<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
<meta http-equiv="X-UA-Compatible" content="IE=9"/>
<title>CVC3: search_fast.cpp Source File</title>
<link href="tabs.css" rel="stylesheet" type="text/css"/>
<script type="text/javascript" src="jquery.js"></script>
<script type="text/javascript" src="dynsections.js"></script>
<link href="doxygen.css" rel="stylesheet" type="text/css" />
</head>
<body>
<div id="top"><!-- do not remove this div, it is closed by doxygen! -->
<div id="titlearea">
<table cellspacing="0" cellpadding="0">
<tbody>
<tr style="height: 56px;">
<td style="padding-left: 0.5em;">
<div id="projectname">CVC3
</div>
</td>
</tr>
</tbody>
</table>
</div>
<!-- end header part -->
<!-- Generated by Doxygen 1.8.2 -->
<div id="navrow1" class="tabs">
<ul class="tablist">
<li><a href="index.html"><span>Main Page</span></a></li>
<li><a href="pages.html"><span>Related Pages</span></a></li>
<li><a href="modules.html"><span>Modules</span></a></li>
<li><a href="namespaces.html"><span>Namespaces</span></a></li>
<li><a href="annotated.html"><span>Classes</span></a></li>
<li class="current"><a href="files.html"><span>Files</span></a></li>
</ul>
</div>
<div id="navrow2" class="tabs2">
<ul class="tablist">
<li><a href="files.html"><span>File List</span></a></li>
<li><a href="globals.html"><span>File Members</span></a></li>
</ul>
</div>
<div id="nav-path" class="navpath">
<ul>
<li class="navelem"><a class="el" href="dir_68267d1309a1af8e8297ef4c3efbcdba.html">src</a></li><li class="navelem"><a class="el" href="dir_5e53e25df8c865d23c4f0f620d3a69fb.html">search</a></li> </ul>
</div>
</div><!-- top -->
<div class="header">
<div class="headertitle">
<div class="title">search_fast.cpp</div> </div>
</div><!--header-->
<div class="contents">
<a href="search__fast_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">///////////////////////////////////////////////////////////////////////////////</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"></span><span class="comment">/*!</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> * \file search_fast.cpp</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> * Author: Mark Zavislak <zavislak@stanford.edu></span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> * Undergraduate</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> * Stanford University </span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> * Created: Mon Jul 21 23:52:39 UTC 2003</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> * <hr></span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> * License to use, copy, modify, sell and/or distribute this software</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> * and its documentation for any purpose is hereby granted without</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> * royalty, subject to the terms and conditions defined in the \ref</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> * LICENSE file provided with this distribution.</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"> * </span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment"> * <hr></span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment">*/</span><span class="comment"></span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment">///////////////////////////////////////////////////////////////////////////////</span></div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment"></span></div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="preprocessor">#include "<a class="code" href="search__fast_8h.html">search_fast.h</a>"</span></div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="preprocessor">#include "<a class="code" href="typecheck__exception_8h.html" title="An exception to be thrown at typecheck error.">typecheck_exception.h</a>"</span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="preprocessor">#include "<a class="code" href="search__rules_8h.html" title="Abstract proof rules interface to the simple search engine.">search_rules.h</a>"</span></div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="preprocessor">#include "<a class="code" href="command__line__flags_8h.html">command_line_flags.h</a>"</span></div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="preprocessor">#include "<a class="code" href="cdmap_8h.html">cdmap.h</a>"</span></div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="preprocessor">#include "<a class="code" href="decision__engine__dfs_8h.html">decision_engine_dfs.h</a>"</span></div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="comment">//#include "decision_engine_caching.h"</span></div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="comment">//#include "decision_engine_mbtf.h"</span></div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="preprocessor">#include "<a class="code" href="expr__transform_8h.html" title="Generally Useful Expression Transformations.">expr_transform.h</a>"</span></div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="preprocessor">#include "<a class="code" href="assumptions_8h.html">assumptions.h</a>"</span></div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> </div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> </div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="keyword">using namespace </span>CVC3;</div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="keyword">using namespace </span>std;</div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span> </div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="comment"></span></div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="comment">//! When set to true, match Chaff behavior as close as possible</span></div>
<div class="line"><a name="l00039"></a><span class="lineno"><a class="code" href="search__fast_8cpp.html#afd7f76a27f781c5a8fe2205dd075d865"> 39</a></span> <span class="comment"></span><span class="preprocessor">#define followChaff false</span></div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> </div>
<div class="line"><a name="l00042"></a><span class="lineno"><a class="code" href="classCVC3_1_1SearchEngineFast_1_1ConflictClauseManager.html#ab6f279d5486d100804dcd8e749cb6665"> 42</a></span> <span class="keywordtype">void</span> <a class="code" href="classCVC3_1_1SearchEngineFast_1_1ConflictClauseManager.html#ab6f279d5486d100804dcd8e749cb6665">SearchEngineFast::ConflictClauseManager::setRestorePoint</a>()</div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span> {</div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"conflict clauses"</span>,</div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  <span class="stringliteral">"ConflictClauseManager::setRestorePoint(): scope="</span>,</div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  d_se->scopeLevel(), <span class="stringliteral">""</span>);</div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  d_se->d_conflictClauseStack.push_back(<span class="keyword">new</span> deque<ClauseOwner>());</div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  d_se->d_conflictClauses = d_se->d_conflictClauseStack.back();</div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  d_restorePoints.push_back(d_se->scopeLevel());</div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span> }</div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span> </div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span> </div>
<div class="line"><a name="l00053"></a><span class="lineno"><a class="code" href="classCVC3_1_1SearchEngineFast_1_1ConflictClauseManager.html#a71dce237fa65a2954f2ab4000369d8cc"> 53</a></span> <span class="keywordtype">void</span> <a class="code" href="classCVC3_1_1SearchEngineFast_1_1ConflictClauseManager.html#a71dce237fa65a2954f2ab4000369d8cc">SearchEngineFast::ConflictClauseManager::notify</a>()</div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span> {</div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  <span class="keywordflow">if</span> (d_restorePoints.size() > 0) {</div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  <span class="keywordtype">int</span> scope = d_restorePoints.back();</div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  <span class="keywordflow">if</span> (scope > d_se->scopeLevel()) {</div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"conflict clauses"</span>,</div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  <span class="stringliteral">"ConflictClauseManager::notify(): restore to scope "</span>, scope, <span class="stringliteral">""</span>);</div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  d_restorePoints.pop_back();</div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  <span class="keywordflow">while</span> (d_se->d_conflictClauses->size() > 0)</div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  d_se->d_conflictClauses->pop_back();</div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  <span class="keyword">delete</span> d_se->d_conflictClauseStack.back();</div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  d_se->d_conflictClauseStack.pop_back();</div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  d_se->d_conflictClauses = d_se->d_conflictClauseStack.back();</div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  }</div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  }</div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span> }</div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span> </div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span> <span class="comment"></span></div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span> <span class="comment">//! Constructor</span></div>
<div class="line"><a name="l00072"></a><span class="lineno"><a class="code" href="group__SE__Fast.html#ga8869c248ac69ea02656c95b40c99ed24"> 72</a></span> <span class="comment"></span><a class="code" href="group__SE__Fast.html#ga8869c248ac69ea02656c95b40c99ed24" title="The main Constructor.">SearchEngineFast::SearchEngineFast</a>(<a class="code" href="classCVC3_1_1TheoryCore.html" title="This theory handles the built-in logical connectives plus equality. It also handles the registration ...">TheoryCore</a>* core)</div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  : <a class="code" href="classCVC3_1_1SearchImplBase.html" title="API to to a generic proof search engine (a.k.a. SAT solver)">SearchImplBase</a>(core),</div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  d_name(<span class="stringliteral">"fast"</span>),</div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  d_unitPropCount(core->getStatistics().counter(<span class="stringliteral">"unit propagations"</span>)),</div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  d_circuitPropCount(core->getStatistics().counter(<span class="stringliteral">"circuit propagations"</span>)),</div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  d_conflictCount(core->getStatistics().counter(<span class="stringliteral">"conflicts"</span>)),</div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  d_conflictClauseCount(core->getStatistics().counter(<span class="stringliteral">"conflict clauses"</span>)),</div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  d_clauses(core->getCM()->getCurrentContext()),</div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  d_unreportedLits(core->getCM()->getCurrentContext()),</div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  d_unreportedLitsHandled(core->getCM()->getCurrentContext()),</div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  d_nonLiterals(core->getCM()->getCurrentContext()),</div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  d_nonLiteralsSaved(core->getCM()->getCurrentContext()),</div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  d_simplifiedThm(core->getCM()->getCurrentContext()),</div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  d_nonlitQueryStart(core->getCM()->getCurrentContext()),</div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  d_nonlitQueryEnd(core->getCM()->getCurrentContext()),</div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  d_clausesQueryStart(core->getCM()->getCurrentContext()),</div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  d_clausesQueryEnd(core->getCM()->getCurrentContext()),</div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  d_conflictClauseManager(core->getCM()->getCurrentContext(), this),</div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  d_literalSet(core->getCM()->getCurrentContext()),</div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  d_useEnqueueFact(false),</div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  d_inCheckSAT(false),</div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  d_litsAlive(core->getCM()->getCurrentContext()),</div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  d_litsMaxScorePos(0),</div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  d_splitterCount(0),</div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  d_litSortCount(0),</div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  d_berkminFlag(false)</div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span> {</div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span> <span class="comment">// if (core->getFlags()["de"].getString() == "caching")</span></div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span> <span class="comment">// d_decisionEngine = new DecisionEngineCaching(core, this);</span></div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span> <span class="comment">// else if (core->getFlags()["de"].getString() == "mbtf")</span></div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span> <span class="comment">// d_decisionEngine = new DecisionEngineMBTF(core, this);</span></div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span> <span class="comment">// else</span></div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  <a class="code" href="group__SE__Fast.html#gafa042a51f718c312ea7728f175958e35" title="Decision Engine.">d_decisionEngine</a> = <span class="keyword">new</span> <a class="code" href="classCVC3_1_1DecisionEngineDFS.html" title="Decision Engine for use with the Search EngineAuthor: Clark Barrett.">DecisionEngineDFS</a>(core, <span class="keyword">this</span>);</div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span> </div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  <a class="code" href="debug_8h.html#a600cb2d68efe7cc413cccbb5714c7016">IF_DEBUG</a> (</div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  <a class="code" href="group__SE__Fast.html#ga07c8e260b60d83042c97453892a15f38" title="Backtrackable list of non-literals (non-CNF formulas).">d_nonLiterals</a>.setName(<span class="stringliteral">"CDList[SearchEngineDefault.d_nonLiterals]"</span>);</div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  <a class="code" href="group__SE__Fast.html#gaa1dd9a29eac4c7da6c669d7888909ca5" title="Backtrackable list of clauses.">d_clauses</a>.setName(<span class="stringliteral">"CDList[SearchEngineDefault.d_clauses]"</span>);</div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  )</div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span> </div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  <a class="code" href="group__SE__Fast.html#ga8e96b8f24bd89c190e561f387a4a30ee" title="Array of conflict clauses: one deque for each outstanding query.">d_conflictClauseStack</a>.push_back(<span class="keyword">new</span> deque<ClauseOwner>());</div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  <a class="code" href="group__SE__Fast.html#gad79601e3b2032aee4d23dc4bbd785fc3" title="Reference to top deque of conflict clauses.">d_conflictClauses</a> = <a class="code" href="group__SE__Fast.html#ga8e96b8f24bd89c190e561f387a4a30ee" title="Array of conflict clauses: one deque for each outstanding query.">d_conflictClauseStack</a>.back();</div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span> }</div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span> <span class="comment"></span></div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span> <span class="comment">//! Destructor</span></div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span> <span class="comment"></span><span class="comment">/*! We own the proof rules (d_rules) and the variable manager (d_vm);</span></div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span> <span class="comment"> delete them. */</span></div>
<div class="line"><a name="l00118"></a><span class="lineno"><a class="code" href="group__SE__Fast.html#ga8f8c0138aa4f31355dad949f604e3927"> 118</a></span> <a class="code" href="group__SE__Fast.html#ga8f8c0138aa4f31355dad949f604e3927" title="Destructor.">SearchEngineFast::~SearchEngineFast</a>() {</div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  <span class="keywordflow">for</span> (<span class="keywordtype">unsigned</span> i=0; i < <a class="code" href="group__SE__Fast.html#ga5db32a771408c468676e407075184b64" title="Mappings of literals to vectors of pointers to the corresponding watched literals.">d_circuits</a>.size(); i++)</div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  <span class="keyword">delete</span> <a class="code" href="group__SE__Fast.html#ga5db32a771408c468676e407075184b64" title="Mappings of literals to vectors of pointers to the corresponding watched literals.">d_circuits</a>[i];</div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  <span class="keyword">delete</span> <a class="code" href="group__SE__Fast.html#gafa042a51f718c312ea7728f175958e35" title="Decision Engine.">d_decisionEngine</a>;</div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  <span class="keywordflow">for</span>(<span class="keywordtype">size_t</span> i=0, iend=<a class="code" href="group__SE__Fast.html#ga8e96b8f24bd89c190e561f387a4a30ee" title="Array of conflict clauses: one deque for each outstanding query.">d_conflictClauseStack</a>.size(); i<iend; ++i)</div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  <span class="keyword">delete</span> <a class="code" href="group__SE__Fast.html#ga8e96b8f24bd89c190e561f387a4a30ee" title="Array of conflict clauses: one deque for each outstanding query.">d_conflictClauseStack</a>[i];</div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span> }</div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span> </div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span> <span class="comment"></span></div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span> <span class="comment">/*! @brief Return a ref to the vector of watched literals. If no</span></div>
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span> <span class="comment"> such vector exists, create it. */</span><span class="comment"></span></div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span> <span class="comment">/*! This function is normally used when the value of 'literal'</span></div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span> <span class="comment"> * becomes false. The vector contains pointers to all clauses where</span></div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span> <span class="comment"> * this literal occurs, and therefore, these clauses may cause unit</span></div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span> <span class="comment"> * propagation. In any case, the watch pointers in these clauses</span></div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span> <span class="comment"> * need to be updated.</span></div>
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span> vector<std::pair<Clause, int> >& </div>
<div class="line"><a name="l00136"></a><span class="lineno"><a class="code" href="group__SE__Fast.html#ga8f4353c8f8c65ed00806861471bd857f"> 136</a></span> <a class="code" href="group__SE__Fast.html#ga8f4353c8f8c65ed00806861471bd857f" title="Return a ref to the vector of watched literals. If no such vector exists, create it.">SearchEngineFast::wp</a>(<span class="keyword">const</span> <a class="code" href="classCVC3_1_1Literal.html">Literal</a>& literal) {</div>
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  <span class="comment">// return d_wp[literal.getExpr()];</span></div>
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  <span class="keywordflow">return</span> literal.<a class="code" href="classCVC3_1_1Literal.html#a93986b2c3cd2889cbbf35fca5d216251">wp</a>();</div>
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span> }</div>
<div class="line"><a name="l00140"></a><span class="lineno"> 140</span> </div>
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span> <span class="preprocessor">#ifdef _CVC3_DEBUG_MODE</span></div>
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span> <span class="preprocessor"></span><span class="keyword">static</span> <span class="keywordtype">void</span> checkAssump(<span class="keyword">const</span> <a class="code" href="classCVC3_1_1Theorem.html">Theorem</a>& t, <span class="keyword">const</span> <a class="code" href="classCVC3_1_1Theorem.html">Theorem</a>& orig,</div>
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  <span class="keyword">const</span> <a class="code" href="classCVC3_1_1CDMap.html">CDMap<Expr,Theorem></a>& assumptions) {</div>
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  <span class="keyword">const</span> <a class="code" href="classCVC3_1_1Assumptions.html">Assumptions</a>& a(t.<a class="code" href="classCVC3_1_1Theorem.html#a5e9ab00a613df15cc02f55edb55a67b3">getAssumptionsRef</a>());</div>
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  <span class="keyword">const</span> <a class="code" href="classCVC3_1_1Assumptions_1_1iterator.html" title="Iterator for the Assumptions: points to class Theorem.">Assumptions::iterator</a> iend = a.end();</div>
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  <span class="keywordflow">if</span>(!(!t.<a class="code" href="classCVC3_1_1Theorem.html#a05282db6832afb4f198d8c6b2b67aeb1">isAssump</a>() || assumptions.<a class="code" href="classCVC3_1_1CDMap.html#af5f700035db0db798c645e36dd0b31bd">count</a>(t.<a class="code" href="classCVC3_1_1Theorem.html#af2b97ae5d270ddf1013bf4f3867a7e5d">getExpr</a>()) > 0))</div>
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  orig.<a class="code" href="classCVC3_1_1Theorem.html#ad9da69b34ab2bab4192e5977e5c10498">printDebug</a>();</div>
<div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>((!t.<a class="code" href="classCVC3_1_1Theorem.html#a05282db6832afb4f198d8c6b2b67aeb1">isAssump</a>() || assumptions.<a class="code" href="classCVC3_1_1CDMap.html#af5f700035db0db798c645e36dd0b31bd">count</a>(t.<a class="code" href="classCVC3_1_1Theorem.html#af2b97ae5d270ddf1013bf4f3867a7e5d">getExpr</a>()) > 0), </div>
<div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  <span class="stringliteral">"checkAssump: found stray theorem:\n "</span></div>
<div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  + t.<a class="code" href="classCVC3_1_1Theorem.html#ac4b1c9570ffb9cc901627ef2abb9ff77">toString</a>());</div>
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  <span class="keywordflow">if</span>(t.<a class="code" href="classCVC3_1_1Theorem.html#a05282db6832afb4f198d8c6b2b67aeb1">isAssump</a>()) <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  <span class="keywordflow">for</span> (<a class="code" href="classCVC3_1_1Assumptions_1_1iterator.html" title="Iterator for the Assumptions: points to class Theorem.">Assumptions::iterator</a> i = a.begin(); i != iend; ++i) {</div>
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  <span class="keywordflow">if</span> (!i->isFlagged()) {</div>
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  i->setFlag();</div>
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  <span class="comment">// comparing only TheoremValue pointers in .find()</span></div>
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  checkAssump(*i, orig, assumptions);</div>
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  }</div>
<div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  }</div>
<div class="line"><a name="l00159"></a><span class="lineno"> 159</span> }</div>
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span> </div>
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span> <span class="comment"></span></div>
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span> <span class="comment">/*! @brief Check that assumptions in the result of checkValid() are a</span></div>
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span> <span class="comment"> subset of assertions */</span><span class="comment"></span></div>
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span> <span class="comment">/*! Only defined in the debug build. </span></div>
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span> <span class="comment"> * \ingroup SE_Default</span></div>
<div class="line"><a name="l00166"></a><span class="lineno"> 166</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00167"></a><span class="lineno"> 167</span> <span class="keyword">static</span> <span class="keywordtype">void</span></div>
<div class="line"><a name="l00168"></a><span class="lineno"> 168</span> checkAssumpDebug(<span class="keyword">const</span> <a class="code" href="classCVC3_1_1Theorem.html">Theorem</a>& res,</div>
<div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  <span class="keyword">const</span> <a class="code" href="classCVC3_1_1CDMap.html">CDMap<Expr,Theorem></a>& assumptions) {</div>
<div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  <span class="comment">// FIXME: (jimz) will need to traverse graph</span></div>
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span> </div>
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  <span class="keywordflow">if</span>(!res.<a class="code" href="classCVC3_1_1Theorem.html#a90349125fe644e8a075e1a47a49872c7">withAssumptions</a>()) <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  res.<a class="code" href="classCVC3_1_1Theorem.html#a621ab2150eedc0e3b38d34275ac206cd" title="Clear the flag attribute in all the theorems.">clearAllFlags</a>();</div>
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  checkAssump(res, res, assumptions);</div>
<div class="line"><a name="l00175"></a><span class="lineno"> 175</span> }</div>
<div class="line"><a name="l00176"></a><span class="lineno"> 176</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00177"></a><span class="lineno"> 177</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span> </div>
<div class="line"><a name="l00179"></a><span class="lineno"> 179</span> </div>
<div class="line"><a name="l00180"></a><span class="lineno"> 180</span> <span class="comment"></span></div>
<div class="line"><a name="l00181"></a><span class="lineno"> 181</span> <span class="comment">////////////////////////////</span></div>
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span> <span class="comment"></span><span class="comment">// New Search Engine Code //</span><span class="comment"></span></div>
<div class="line"><a name="l00183"></a><span class="lineno"> 183</span> <span class="comment">////////////////////////////</span></div>
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span> <span class="comment"></span></div>
<div class="line"><a name="l00185"></a><span class="lineno"> 185</span> </div>
<div class="line"><a name="l00186"></a><span class="lineno"><a class="code" href="group__SE__Fast.html#gac68652e5ed46a097f846ba9a86fcd630"> 186</a></span> <a class="code" href="namespaceCVC3.html#a060d21b3207cc3471e24f8dbcff3498b">QueryResult</a> <a class="code" href="group__SE__Fast.html#gac68652e5ed46a097f846ba9a86fcd630">SearchEngineFast::checkSAT</a>()</div>
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span> {</div>
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  <a class="code" href="group__SE__Fast.html#ga6368ec56b20c12896000e370bbb4a3b6" title="True when checkSAT() is running.">d_inCheckSAT</a>=<span class="keyword">true</span>;</div>
<div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  <a class="code" href="namespaceCVC3.html#a060d21b3207cc3471e24f8dbcff3498b">QueryResult</a> result = <a class="code" href="namespaceCVC3.html#a060d21b3207cc3471e24f8dbcff3498baba54da61f61403de5204b899fe55d92f">UNSATISFIABLE</a>;</div>
<div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  <span class="keywordflow">if</span> (!<a class="code" href="group__SE__Fast.html#gac6d49471ba5c76fffc7581e01e423218" title="Boolean constraint propagation.">bcp</a>()) { <span class="comment">// run an initial bcp</span></div>
<div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(<a class="code" href="group__SE__Fast.html#ga4b05dccebac3de019dc112ab3dffc988" title="Queue of derived facts to be sent to DPs.">d_factQueue</a>.empty(), <span class="stringliteral">"checkSAT()"</span>);</div>
<div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  <span class="keywordflow">if</span> (!<a class="code" href="group__SE__Fast.html#ga4490cc372993398612e7556e14222ff3" title="Determines backtracking level and adds conflict clauses.">fixConflict</a>()) <span class="keywordflow">goto</span> checkSATfinalize;</div>
<div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  }</div>
<div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  <span class="keywordflow">while</span> (!<a class="code" href="group__SE.html#ga3772c6af7eac91b9ed7fc278edf5ef90" title="Access to theory reasoning.">d_core</a>-><a class="code" href="classCVC3_1_1TheoryCore.html#abf168c0ef6bed9274e49dc2c0576312e" title="Return true if resources are exhausted.">outOfResources</a>()) {</div>
<div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  <span class="keywordflow">if</span> (<a class="code" href="group__SE__Fast.html#ga6d05128f71cc4e239030fe0434cda727" title="Choose a splitter.">split</a>()) { <span class="comment">// if we were able to split successfully</span></div>
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  <span class="comment">// Run BCP</span></div>
<div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  <span class="keywordflow">while</span> (!<a class="code" href="group__SE__Fast.html#gac6d49471ba5c76fffc7581e01e423218" title="Boolean constraint propagation.">bcp</a>()) { <span class="comment">// while bcp finds conflicts</span></div>
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(<a class="code" href="group__SE__Fast.html#ga4b05dccebac3de019dc112ab3dffc988" title="Queue of derived facts to be sent to DPs.">d_factQueue</a>.empty(), <span class="stringliteral">"checkSAT()"</span>);</div>
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  <a class="code" href="group__SE__Fast.html#gafa042a51f718c312ea7728f175958e35" title="Decision Engine.">d_decisionEngine</a>-><a class="code" href="group__DE.html#ga7910d09d94bd27c02f53a3f7e0a9af00" title="Search should call this when it derives 'false'.">goalSatisfied</a>();</div>
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span> </div>
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  <span class="comment">// Try to fix those conflicts by rolling back contexts and</span></div>
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  <span class="comment">// adding new conflict clauses to help in the future.</span></div>
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  <span class="keywordflow">if</span> (!<a class="code" href="group__SE__Fast.html#ga4490cc372993398612e7556e14222ff3" title="Determines backtracking level and adds conflict clauses.">fixConflict</a>()) <span class="keywordflow">goto</span> checkSATfinalize;</div>
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  }</div>
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  }</div>
<div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  <span class="comment">// Now we couldn't find a splitter. This may have been caused by</span></div>
<div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  <span class="comment">// other reasons, so we allow them to be processed here.</span></div>
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  result = <a class="code" href="namespaceCVC3.html#a060d21b3207cc3471e24f8dbcff3498bad11a6bd5ab8c3e02ec8503e7a7860a61">SATISFIABLE</a>;</div>
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  }</div>
<div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  }</div>
<div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  checkSATfinalize:</div>
<div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  <a class="code" href="group__SE__Fast.html#ga6368ec56b20c12896000e370bbb4a3b6" title="True when checkSAT() is running.">d_inCheckSAT</a> = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  <span class="keywordflow">if</span> (<a class="code" href="group__SE.html#ga3772c6af7eac91b9ed7fc278edf5ef90" title="Access to theory reasoning.">d_core</a>-><a class="code" href="classCVC3_1_1TheoryCore.html#abf168c0ef6bed9274e49dc2c0576312e" title="Return true if resources are exhausted.">outOfResources</a>()) result = <a class="code" href="namespaceCVC3.html#a060d21b3207cc3471e24f8dbcff3498ba33046505033fa14ebb412efb4474ff56">ABORT</a>;</div>
<div class="line"><a name="l00216"></a><span class="lineno"> 216</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (result == <a class="code" href="namespaceCVC3.html#a060d21b3207cc3471e24f8dbcff3498bad11a6bd5ab8c3e02ec8503e7a7860a61">SATISFIABLE</a> && <a class="code" href="group__SE.html#ga3772c6af7eac91b9ed7fc278edf5ef90" title="Access to theory reasoning.">d_core</a>-><a class="code" href="classCVC3_1_1TheoryCore.html#a36571dc56183d89cd36def27939430b0" title="Check if the current decision branch is marked as incomplete.">incomplete</a>()) result = <a class="code" href="namespaceCVC3.html#a060d21b3207cc3471e24f8dbcff3498ba249f3dbc426c80d4a31cb5073bf07cfa">UNKNOWN</a>;</div>
<div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  <span class="keywordflow">return</span> result;</div>
<div class="line"><a name="l00218"></a><span class="lineno"> 218</span> }</div>
<div class="line"><a name="l00219"></a><span class="lineno"> 219</span> </div>
<div class="line"><a name="l00220"></a><span class="lineno"> 220</span> </div>
<div class="line"><a name="l00221"></a><span class="lineno"> 221</span> <span class="comment">/* There are different heurisitics for splitters available. We would</span></div>
<div class="line"><a name="l00222"></a><span class="lineno"> 222</span> <span class="comment"> * normally try to use the new generic decision class, but initially</span></div>
<div class="line"><a name="l00223"></a><span class="lineno"> 223</span> <span class="comment"> * we want this just to work, and so we use a custom decision class</span></div>
<div class="line"><a name="l00224"></a><span class="lineno"> 224</span> <span class="comment"> * that knows about this particular search engine. We can realize</span></div>
<div class="line"><a name="l00225"></a><span class="lineno"> 225</span> <span class="comment"> * this same behavior using the existing mechanism by having a</span></div>
<div class="line"><a name="l00226"></a><span class="lineno"> 226</span> <span class="comment"> * decision subclass dynamic_cast the received SearchEngine pointer as</span></div>
<div class="line"><a name="l00227"></a><span class="lineno"> 227</span> <span class="comment"> * a SearchEngineFast and work from there. However, as of this time I</span></div>
<div class="line"><a name="l00228"></a><span class="lineno"> 228</span> <span class="comment"> * do not plan on supporting the nextClause() and nextNonClause()</span></div>
<div class="line"><a name="l00229"></a><span class="lineno"> 229</span> <span class="comment"> * functionality, as they don't make much sense in this kind of modern</span></div>
<div class="line"><a name="l00230"></a><span class="lineno"> 230</span> <span class="comment"> * solver. It may make more sense to have the solver and it's literal</span></div>
<div class="line"><a name="l00231"></a><span class="lineno"> 231</span> <span class="comment"> * splitting heuristic tightly connected, but leaving the nonLiteral</span></div>
<div class="line"><a name="l00232"></a><span class="lineno"> 232</span> <span class="comment"> * splitting heurisitic separate, since it is generally independent of</span></div>
<div class="line"><a name="l00233"></a><span class="lineno"> 233</span> <span class="comment"> * the search mechanism.</span></div>
<div class="line"><a name="l00234"></a><span class="lineno"> 234</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00235"></a><span class="lineno"> 235</span> <span class="comment"> * By this point we've already guaranteed that we need to split: no</span></div>
<div class="line"><a name="l00236"></a><span class="lineno"> 236</span> <span class="comment"> * unit clauses, and no conflicts. The procedure is as follows. Ask</span></div>
<div class="line"><a name="l00237"></a><span class="lineno"> 237</span> <span class="comment"> * the decision engine for an expression to split on. The decision</span></div>
<div class="line"><a name="l00238"></a><span class="lineno"> 238</span> <span class="comment"> * engine dutifully returns an expression. We craft an assumption out</span></div>
<div class="line"><a name="l00239"></a><span class="lineno"> 239</span> <span class="comment"> * of this and assert it to the core (after making sure d_assumptions</span></div>
<div class="line"><a name="l00240"></a><span class="lineno"> 240</span> <span class="comment"> * has a copy).</span></div>
<div class="line"><a name="l00241"></a><span class="lineno"> 241</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00242"></a><span class="lineno"> 242</span> <span class="comment"> * If no splitters are available, we still have to let the decision</span></div>
<div class="line"><a name="l00243"></a><span class="lineno"> 243</span> <span class="comment"> * procedures have a final chance at showing the context is</span></div>
<div class="line"><a name="l00244"></a><span class="lineno"> 244</span> <span class="comment"> * inconsistent by calling checkSATcore(). If we get a false out of</span></div>
<div class="line"><a name="l00245"></a><span class="lineno"> 245</span> <span class="comment"> * this, we have to continue processing, so the context is left</span></div>
<div class="line"><a name="l00246"></a><span class="lineno"> 246</span> <span class="comment"> * unchanged, no splitter is chosen, and we return true to let the</span></div>
<div class="line"><a name="l00247"></a><span class="lineno"> 247</span> <span class="comment"> * bcp+conflict processing have another chance. If we get true, then</span></div>
<div class="line"><a name="l00248"></a><span class="lineno"> 248</span> <span class="comment"> * the problem is SAT and we are done, so we return false.</span></div>
<div class="line"><a name="l00249"></a><span class="lineno"> 249</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00250"></a><span class="lineno"> 250</span> <span class="comment"> * Otherwise, we obtain the splitter, then ship it back off to the</span></div>
<div class="line"><a name="l00251"></a><span class="lineno"> 251</span> <span class="comment"> * decision engine for processing.</span></div>
<div class="line"><a name="l00252"></a><span class="lineno"> 252</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00253"></a><span class="lineno"> 253</span> </div>
<div class="line"><a name="l00254"></a><span class="lineno"><a class="code" href="group__SE__Fast.html#ga6d05128f71cc4e239030fe0434cda727"> 254</a></span> <span class="keywordtype">bool</span> <a class="code" href="group__SE__Fast.html#ga6d05128f71cc4e239030fe0434cda727" title="Choose a splitter.">SearchEngineFast::split</a>()</div>
<div class="line"><a name="l00255"></a><span class="lineno"> 255</span> {</div>
<div class="line"><a name="l00256"></a><span class="lineno"> 256</span>  <a class="code" href="debug_8h.html#ad64155edafde9f067f4868817cd04bdf">TRACE_MSG</a>(<span class="stringliteral">"search basic"</span>, <span class="stringliteral">"Choosing splitter"</span>);</div>
<div class="line"><a name="l00257"></a><span class="lineno"> 257</span>  <a class="code" href="classCVC3_1_1Expr.html" title="Data structure of expressions in CVC3.">Expr</a> splitter = <a class="code" href="group__SE__Fast.html#ga711544b769f4c0a5713df247de927019" title="Returns a splitter.">findSplitter</a>();</div>
<div class="line"><a name="l00258"></a><span class="lineno"> 258</span>  <span class="keywordflow">if</span> (splitter.<a class="code" href="group__ExprPkg.html#ga0265d1ca42fa59c95aaff3ca675b6504">isNull</a>()) {</div>
<div class="line"><a name="l00259"></a><span class="lineno"> 259</span>  <a class="code" href="debug_8h.html#ad64155edafde9f067f4868817cd04bdf">TRACE_MSG</a>(<span class="stringliteral">"search basic"</span>, <span class="stringliteral">"No splitter"</span>);</div>
<div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  <span class="keywordtype">bool</span> res(<a class="code" href="group__SE.html#ga3772c6af7eac91b9ed7fc278edf5ef90" title="Access to theory reasoning.">d_core</a>-><a class="code" href="classCVC3_1_1TheoryCore.html#a289340e4457a79f1101f37c3a07a49ed" title="Check if the current context is inconsistent.">inconsistent</a>() || !<a class="code" href="group__SE.html#ga3772c6af7eac91b9ed7fc278edf5ef90" title="Access to theory reasoning.">d_core</a>-><a class="code" href="classCVC3_1_1TheoryCore.html#ae45217f71500d48ef1c4c5118011f254" title="To be called by SearchEngine when it believes the context is satisfiable.">checkSATCore</a>());</div>
<div class="line"><a name="l00261"></a><span class="lineno"> 261</span>  <span class="keywordflow">if</span>(!res) {</div>
<div class="line"><a name="l00262"></a><span class="lineno"> 262</span>  <a class="code" href="group__SE__Fast.html#ga52c9c181bcd623a36ab594e0ee16a67e" title="Internal splitter counter for delaying updateLitScores()">d_splitterCount</a> = 0; <span class="comment">// Force resorting splitters next time</span></div>
<div class="line"><a name="l00263"></a><span class="lineno"> 263</span>  res = !<a class="code" href="group__SE__Fast.html#gac6d49471ba5c76fffc7581e01e423218" title="Boolean constraint propagation.">bcp</a>();</div>
<div class="line"><a name="l00264"></a><span class="lineno"> 264</span>  }</div>
<div class="line"><a name="l00265"></a><span class="lineno"> 265</span>  <span class="keywordflow">return</span> res;</div>
<div class="line"><a name="l00266"></a><span class="lineno"> 266</span>  }</div>
<div class="line"><a name="l00267"></a><span class="lineno"> 267</span>  <a class="code" href="classCVC3_1_1Literal.html">Literal</a> l(<a class="code" href="group__SE.html#gaf0dbbb1806723760ab8744e96a8c6657" title="Construct a Literal out of an Expr or return an existing one.">newLiteral</a>(splitter));</div>
<div class="line"><a name="l00268"></a><span class="lineno"> 268</span>  <a class="code" href="classCVC3_1_1Theorem.html">Theorem</a> simp;</div>
<div class="line"><a name="l00269"></a><span class="lineno"> 269</span>  <span class="keywordflow">if</span>(l.<a class="code" href="classCVC3_1_1Literal.html#a48feb6e7cf83b3a59b94ca0e75627d0f">getValue</a>() != 0) {</div>
<div class="line"><a name="l00270"></a><span class="lineno"> 270</span>  <span class="comment">// The literal is valid at a lower scope than it has been derived,</span></div>
<div class="line"><a name="l00271"></a><span class="lineno"> 271</span>  <span class="comment">// and therefore, it was lost after a scope pop. Reassert it here.</span></div>
<div class="line"><a name="l00272"></a><span class="lineno"> 272</span>  simp = l.<a class="code" href="classCVC3_1_1Literal.html#a9d040e10a412d4a86642a9b2776dd258">deriveTheorem</a>();</div>
<div class="line"><a name="l00273"></a><span class="lineno"> 273</span>  <a class="code" href="group__SE__Fast.html#gaa6a69bd3df4bb72abd1e9b0fe868fc0d" title="Set of literals to be processed by bcp.">d_literals</a>.push_back((l.<a class="code" href="classCVC3_1_1Literal.html#a48feb6e7cf83b3a59b94ca0e75627d0f">getValue</a>() == 1)? l : !l);</div>
<div class="line"><a name="l00274"></a><span class="lineno"> 274</span>  <a class="code" href="group__SE.html#ga3772c6af7eac91b9ed7fc278edf5ef90" title="Access to theory reasoning.">d_core</a>-><a class="code" href="classCVC3_1_1TheoryCore.html#aecef2465eb761f7f112ddce77f93d081" title="Add a new assertion to the core from the user or a SAT solver. Do NOT use it in a decision procedure;...">addFact</a>(simp);</div>
<div class="line"><a name="l00275"></a><span class="lineno"> 275</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a name="l00276"></a><span class="lineno"> 276</span>  }</div>
<div class="line"><a name="l00277"></a><span class="lineno"> 277</span>  <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00278"></a><span class="lineno"> 278</span>  simp = <a class="code" href="group__SE.html#ga3772c6af7eac91b9ed7fc278edf5ef90" title="Access to theory reasoning.">d_core</a>-><a class="code" href="classCVC3_1_1TheoryCore.html#a8a66da5ca687474a3a725448a3be8c41" title="Top-level simplifier.">simplify</a>(splitter);</div>
<div class="line"><a name="l00279"></a><span class="lineno"> 279</span>  <a class="code" href="classCVC3_1_1Expr.html" title="Data structure of expressions in CVC3.">Expr</a> e = simp.<a class="code" href="classCVC3_1_1Theorem.html#a97d957fcbf9094480851b1d2e5d3729f">getRHS</a>();</div>
<div class="line"><a name="l00280"></a><span class="lineno"> 280</span>  <span class="keywordflow">if</span>(e.<a class="code" href="group__ExprPkg.html#ga5c2cee598096c66e80d87490d6505bc4">isBoolConst</a>()) {</div>
<div class="line"><a name="l00281"></a><span class="lineno"> 281</span>  <a class="code" href="debug_8h.html#a600cb2d68efe7cc413cccbb5714c7016">IF_DEBUG</a>(debugger.counter(<span class="stringliteral">"splitter simplified to TRUE or FALSE"</span>)++;)</div>
<div class="line"><a name="l00282"></a><span class="lineno"> 282</span>  <span class="keywordflow">if</span>(e.<a class="code" href="group__ExprPkg.html#gadf8596df73fa69ff8e6a22b9321f5c34">isTrue</a>()) simp = <a class="code" href="group__SE.html#ga63f2a3cfcfa86820bea2f45cb890cc1c" title="Common proof rules.">d_commonRules</a>-><a class="code" href="classCVC3_1_1CommonProofRules.html#ad2edb920405666bf6e9d21ae496ff6b3">iffTrueElim</a>(simp);</div>
<div class="line"><a name="l00283"></a><span class="lineno"> 283</span>  <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00284"></a><span class="lineno"> 284</span>  <span class="keywordflow">if</span>(splitter.<a class="code" href="group__ExprPkg.html#ga1a898858ccadce833df5a294c7740f11">isNot</a>())</div>
<div class="line"><a name="l00285"></a><span class="lineno"> 285</span>  simp = <a class="code" href="group__SE.html#ga63f2a3cfcfa86820bea2f45cb890cc1c" title="Common proof rules.">d_commonRules</a>-><a class="code" href="classCVC3_1_1CommonProofRules.html#ace6786234994faf89bc1b0ac8575278a">notNotElim</a>(<a class="code" href="group__SE.html#ga63f2a3cfcfa86820bea2f45cb890cc1c" title="Common proof rules.">d_commonRules</a>-><a class="code" href="classCVC3_1_1CommonProofRules.html#a11b56754024b56844336954cf789a63a">iffFalseElim</a>(simp));</div>
<div class="line"><a name="l00286"></a><span class="lineno"> 286</span>  <span class="keywordflow">else</span></div>
<div class="line"><a name="l00287"></a><span class="lineno"> 287</span>  simp = <a class="code" href="group__SE.html#ga63f2a3cfcfa86820bea2f45cb890cc1c" title="Common proof rules.">d_commonRules</a>-><a class="code" href="classCVC3_1_1CommonProofRules.html#a11b56754024b56844336954cf789a63a">iffFalseElim</a>(simp);</div>
<div class="line"><a name="l00288"></a><span class="lineno"> 288</span>  }</div>
<div class="line"><a name="l00289"></a><span class="lineno"> 289</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"search full"</span>, <span class="stringliteral">"Simplified candidate: "</span>, splitter.<a class="code" href="group__ExprPkg.html#gaf3028bb1619f8cc69b66ec712e1adb54" title="Print the expression to a string.">toString</a>(), <span class="stringliteral">""</span>);</div>
<div class="line"><a name="l00290"></a><span class="lineno"> 290</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"search full"</span>, <span class="stringliteral">" to: "</span>,</div>
<div class="line"><a name="l00291"></a><span class="lineno"> 291</span>  simp.<a class="code" href="classCVC3_1_1Theorem.html#af2b97ae5d270ddf1013bf4f3867a7e5d">getExpr</a>().<a class="code" href="group__ExprPkg.html#gaf3028bb1619f8cc69b66ec712e1adb54" title="Print the expression to a string.">toString</a>(), <span class="stringliteral">""</span>);</div>
<div class="line"><a name="l00292"></a><span class="lineno"> 292</span>  <span class="comment">// Send this literal to DPs and enqueue it for BCP</span></div>
<div class="line"><a name="l00293"></a><span class="lineno"> 293</span>  <a class="code" href="group__SE.html#ga3772c6af7eac91b9ed7fc278edf5ef90" title="Access to theory reasoning.">d_core</a>-><a class="code" href="classCVC3_1_1TheoryCore.html#aecef2465eb761f7f112ddce77f93d081" title="Add a new assertion to the core from the user or a SAT solver. Do NOT use it in a decision procedure;...">addFact</a>(simp);</div>
<div class="line"><a name="l00294"></a><span class="lineno"> 294</span>  <a class="code" href="group__SE__Fast.html#gaef3113afb8dc9ea1b06217ab77f5d713" title="Notify the search engine about a new literal fact.">addLiteralFact</a>(simp);</div>
<div class="line"><a name="l00295"></a><span class="lineno"> 295</span>  <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(l.<a class="code" href="classCVC3_1_1Literal.html#a48feb6e7cf83b3a59b94ca0e75627d0f">getValue</a>()!=0, <span class="stringliteral">"SearchFast::split(): l = "</span>+l.<a class="code" href="classCVC3_1_1Literal.html#aff53e6b3e4da8c649816441046983a30">toString</a>());</div>
<div class="line"><a name="l00296"></a><span class="lineno"> 296</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a name="l00297"></a><span class="lineno"> 297</span>  }</div>
<div class="line"><a name="l00298"></a><span class="lineno"> 298</span>  }</div>
<div class="line"><a name="l00299"></a><span class="lineno"> 299</span> </div>
<div class="line"><a name="l00300"></a><span class="lineno"> 300</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"search terse"</span>, <span class="stringliteral">"Asserting splitter: #"</span></div>
<div class="line"><a name="l00301"></a><span class="lineno"> 301</span>  +<a class="code" href="namespaceCVC3.html#af69618103f1f0f2eadada0796a2a940c">int2string</a>(<a class="code" href="group__SE.html#ga3772c6af7eac91b9ed7fc278edf5ef90" title="Access to theory reasoning.">d_core</a>-><a class="code" href="classCVC3_1_1TheoryCore.html#a7f119c4fa5313b72feca7dd441e045f0">getStatistics</a>().<a class="code" href="classCVC3_1_1Statistics.html#a9b2503d33c8c41b768f40b1a43c2d3bf">counter</a>(<span class="stringliteral">"splitters"</span>))+<span class="stringliteral">": "</span>,</div>
<div class="line"><a name="l00302"></a><span class="lineno"> 302</span>  splitter, <span class="stringliteral">""</span>);</div>
<div class="line"><a name="l00303"></a><span class="lineno"> 303</span>  <a class="code" href="group__SE__Fast.html#gafa042a51f718c312ea7728f175958e35" title="Decision Engine.">d_decisionEngine</a>-><a class="code" href="group__DE.html#ga03a83031c2361cce4e8ce952842973be" title="Push context and record the splitter.">pushDecision</a>(splitter);</div>
<div class="line"><a name="l00304"></a><span class="lineno"> 304</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a name="l00305"></a><span class="lineno"> 305</span> }</div>
<div class="line"><a name="l00306"></a><span class="lineno"> 306</span> <span class="comment"></span></div>
<div class="line"><a name="l00307"></a><span class="lineno"> 307</span> <span class="comment">//! Total order on literals for the initial sort</span></div>
<div class="line"><a name="l00308"></a><span class="lineno"> 308</span> <span class="comment"></span><span class="comment">/*! Used for debugging, to match Chaff's behavior as close as possible</span></div>
<div class="line"><a name="l00309"></a><span class="lineno"> 309</span> <span class="comment"> and track any discrepancies or inefficiencies. */</span></div>
<div class="line"><a name="l00310"></a><span class="lineno"> 310</span> <span class="comment">// static bool compareInitial(const Literal& l1, const Literal& l2) {</span></div>
<div class="line"><a name="l00311"></a><span class="lineno"> 311</span> <span class="comment">// Expr lit1 = l1.getVar().getExpr();</span></div>
<div class="line"><a name="l00312"></a><span class="lineno"> 312</span> <span class="comment">// Expr lit2 = l2.getVar().getExpr();</span></div>
<div class="line"><a name="l00313"></a><span class="lineno"> 313</span> <span class="comment">// if(lit1.hasOp() && lit2.hasOp()) {</span></div>
<div class="line"><a name="l00314"></a><span class="lineno"> 314</span> <span class="comment">// int i = atoi(&(lit1.getOp().getName().c_str()[2]));</span></div>
<div class="line"><a name="l00315"></a><span class="lineno"> 315</span> <span class="comment">// int j = atoi(&(lit2.getOp().getName().c_str()[2]));</span></div>
<div class="line"><a name="l00316"></a><span class="lineno"> 316</span> <span class="comment">// return (i < j);</span></div>
<div class="line"><a name="l00317"></a><span class="lineno"> 317</span> <span class="comment">// }</span></div>
<div class="line"><a name="l00318"></a><span class="lineno"> 318</span> <span class="comment">// else</span></div>
<div class="line"><a name="l00319"></a><span class="lineno"> 319</span> <span class="comment">// return (l1.score() > l2.score());</span></div>
<div class="line"><a name="l00320"></a><span class="lineno"> 320</span> <span class="comment">// }</span></div>
<div class="line"><a name="l00321"></a><span class="lineno"> 321</span> <span class="comment"></span></div>
<div class="line"><a name="l00322"></a><span class="lineno"> 322</span> <span class="comment">//! Ordering on literals, used to sort them by score</span></div>
<div class="line"><a name="l00323"></a><span class="lineno"><a class="code" href="search__fast_8cpp.html#a55afec8e553f4d1c6487c4e63a0c2375"> 323</a></span> <span class="comment"></span><span class="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">bool</span> <a class="code" href="search__fast_8cpp.html#a55afec8e553f4d1c6487c4e63a0c2375" title="Total order on literals for the initial sort.">compareLits</a>(<span class="keyword">const</span> <a class="code" href="classCVC3_1_1Literal.html">Literal</a>& l1, </div>
<div class="line"><a name="l00324"></a><span class="lineno"> 324</span>  <span class="keyword">const</span> <a class="code" href="classCVC3_1_1Literal.html">Literal</a>& l2) </div>
<div class="line"><a name="l00325"></a><span class="lineno"> 325</span> {</div>
<div class="line"><a name="l00326"></a><span class="lineno"> 326</span>  <span class="keywordflow">return</span> (l1.<a class="code" href="classCVC3_1_1Literal.html#a436c5126780bd81c31bc01a868b5b857">score</a>() > l2.<a class="code" href="classCVC3_1_1Literal.html#a436c5126780bd81c31bc01a868b5b857">score</a>());</div>
<div class="line"><a name="l00327"></a><span class="lineno"> 327</span> }</div>
<div class="line"><a name="l00328"></a><span class="lineno"> 328</span> </div>
<div class="line"><a name="l00329"></a><span class="lineno"><a class="code" href="search__fast_8cpp.html#a103b8b2bf60d232d0c107d749cd1be18"> 329</a></span> <a class="code" href="debug_8h.html#a600cb2d68efe7cc413cccbb5714c7016">IF_DEBUG</a>(<span class="keyword">static</span> <span class="keywordtype">string</span> lits2str(<span class="keyword">const</span> vector<Literal>& lits) {</div>
<div class="line"><a name="l00330"></a><span class="lineno"> 330</span>  ostringstream ss;</div>
<div class="line"><a name="l00331"></a><span class="lineno"> 331</span>  ss << <span class="stringliteral">"\n["</span>;</div>
<div class="line"><a name="l00332"></a><span class="lineno"> 332</span>  <span class="keywordflow">for</span>(vector<Literal>::const_iterator i=lits.begin(), iend=lits.end();</div>
<div class="line"><a name="l00333"></a><span class="lineno"> 333</span>  i!=iend; ++i)</div>
<div class="line"><a name="l00334"></a><span class="lineno"> 334</span>  ss << *i << <span class="stringliteral">"\n "</span>;</div>
<div class="line"><a name="l00335"></a><span class="lineno"> 335</span>  ss << <span class="stringliteral">"\n]"</span>;</div>
<div class="line"><a name="l00336"></a><span class="lineno"> 336</span>  <span class="keywordflow">return</span> ss.str();</div>
<div class="line"><a name="l00337"></a><span class="lineno"> 337</span> })</div>
<div class="line"><a name="l00338"></a><span class="lineno"> 338</span> </div>
<div class="line"><a name="l00339"></a><span class="lineno"> 339</span> <span class="comment"></span></div>
<div class="line"><a name="l00340"></a><span class="lineno"> 340</span> <span class="comment">/*!</span></div>
<div class="line"><a name="l00341"></a><span class="lineno"> 341</span> <span class="comment"> * Recompute the scores for all known literals. This is a relatively</span></div>
<div class="line"><a name="l00342"></a><span class="lineno"> 342</span> <span class="comment"> * expensive procedure, so it should not be called too often.</span></div>
<div class="line"><a name="l00343"></a><span class="lineno"> 343</span> <span class="comment"> * Currently, it is called once per 100 splitters.</span></div>
<div class="line"><a name="l00344"></a><span class="lineno"> 344</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00345"></a><span class="lineno"> 345</span> <span class="keywordtype">void</span> <a class="code" href="group__SE__Fast.html#ga7311848b70f91fad18ca95b7347749cb">SearchEngineFast::updateLitScores</a>(<span class="keywordtype">bool</span> firstTime)</div>
<div class="line"><a name="l00346"></a><span class="lineno"> 346</span> {</div>
<div class="line"><a name="l00347"></a><span class="lineno"> 347</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"search literals"</span>, <span class="stringliteral">"updateLitScores(size="</span>, d_litsByScores.size(),</div>
<div class="line"><a name="l00348"></a><span class="lineno"> 348</span>  <span class="stringliteral">") {"</span>);</div>
<div class="line"><a name="l00349"></a><span class="lineno"> 349</span>  <span class="keywordtype">unsigned</span> count, score;</div>
<div class="line"><a name="l00350"></a><span class="lineno"> 350</span> </div>
<div class="line"><a name="l00351"></a><span class="lineno"> 351</span>  <span class="keywordflow">if</span> (firstTime && <a class="code" href="search__fast_8cpp.html#afd7f76a27f781c5a8fe2205dd075d865" title="When set to true, match Chaff behavior as close as possible.">followChaff</a>) {</div>
<div class="line"><a name="l00352"></a><span class="lineno"> 352</span>  ::stable_sort(d_litsByScores.begin(), d_litsByScores.end(), <a class="code" href="search__fast_8cpp.html#a55afec8e553f4d1c6487c4e63a0c2375" title="Total order on literals for the initial sort.">compareLits</a>);</div>
<div class="line"><a name="l00353"></a><span class="lineno"> 353</span>  }</div>
<div class="line"><a name="l00354"></a><span class="lineno"> 354</span> </div>
<div class="line"><a name="l00355"></a><span class="lineno"> 355</span>  <span class="keywordflow">for</span>(<span class="keywordtype">size_t</span> i=0; i< d_litsByScores.size(); ++i) {</div>
<div class="line"><a name="l00356"></a><span class="lineno"> 356</span>  <span class="comment">// Reading by value, since we'll be modifying the attributes.</span></div>
<div class="line"><a name="l00357"></a><span class="lineno"> 357</span>  <a class="code" href="classCVC3_1_1Literal.html">Literal</a> lit = d_litsByScores[i];</div>
<div class="line"><a name="l00358"></a><span class="lineno"> 358</span>  <span class="comment">// First, clean up the unused literals</span></div>
<div class="line"><a name="l00359"></a><span class="lineno"> 359</span>  <span class="keywordflow">while</span>(lit.<a class="code" href="classCVC3_1_1Literal.html#a4823b2e9ec3a6a13a28c209d22269564">count</a>()==0 && i+1 < d_litsByScores.size()) {</div>
<div class="line"><a name="l00360"></a><span class="lineno"> 360</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"search literals"</span>, <span class="stringliteral">"Removing lit["</span>+<a class="code" href="namespaceCVC3.html#af69618103f1f0f2eadada0796a2a940c">int2string</a>(i)+<span class="stringliteral">"] = "</span>, lit,</div>
<div class="line"><a name="l00361"></a><span class="lineno"> 361</span>  <span class="stringliteral">" from d_litsByScores"</span>);</div>
<div class="line"><a name="l00362"></a><span class="lineno"> 362</span>  <span class="comment">// Remove this literal from the list</span></div>
<div class="line"><a name="l00363"></a><span class="lineno"> 363</span>  lit.<a class="code" href="classCVC3_1_1Literal.html#a49129c1ccac9ad6380af512daae84b34">added</a>()=<span class="keyword">false</span>;</div>
<div class="line"><a name="l00364"></a><span class="lineno"> 364</span>  lit = d_litsByScores.back();</div>
<div class="line"><a name="l00365"></a><span class="lineno"> 365</span>  d_litsByScores[i] = lit;</div>
<div class="line"><a name="l00366"></a><span class="lineno"> 366</span>  d_litsByScores.pop_back();</div>
<div class="line"><a name="l00367"></a><span class="lineno"> 367</span>  }</div>
<div class="line"><a name="l00368"></a><span class="lineno"> 368</span>  <span class="comment">// Take care of the last literal in the vector</span></div>
<div class="line"><a name="l00369"></a><span class="lineno"> 369</span>  <span class="keywordflow">if</span>(lit.<a class="code" href="classCVC3_1_1Literal.html#a4823b2e9ec3a6a13a28c209d22269564">count</a>()==0 && i+1 == d_litsByScores.size()) {</div>
<div class="line"><a name="l00370"></a><span class="lineno"> 370</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"search literals"</span>, <span class="stringliteral">"Removing last lit["</span>+<a class="code" href="namespaceCVC3.html#af69618103f1f0f2eadada0796a2a940c">int2string</a>(i)+<span class="stringliteral">"] = "</span>, lit,</div>
<div class="line"><a name="l00371"></a><span class="lineno"> 371</span>  <span class="stringliteral">" from d_litsByScores"</span>);</div>
<div class="line"><a name="l00372"></a><span class="lineno"> 372</span>  lit.<a class="code" href="classCVC3_1_1Literal.html#a49129c1ccac9ad6380af512daae84b34">added</a>()=<span class="keyword">false</span>;</div>
<div class="line"><a name="l00373"></a><span class="lineno"> 373</span>  d_litsByScores.pop_back();</div>
<div class="line"><a name="l00374"></a><span class="lineno"> 374</span>  <span class="keywordflow">break</span>; <span class="comment">// Break out of the loop -- no more literals to process</span></div>
<div class="line"><a name="l00375"></a><span class="lineno"> 375</span>  }</div>
<div class="line"><a name="l00376"></a><span class="lineno"> 376</span> </div>
<div class="line"><a name="l00377"></a><span class="lineno"> 377</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"search literals"</span>, <span class="stringliteral">"Updating lit["</span>+<a class="code" href="namespaceCVC3.html#af69618103f1f0f2eadada0796a2a940c">int2string</a>(i)+<span class="stringliteral">"] = "</span>, lit, <span class="stringliteral">" {"</span>);</div>
<div class="line"><a name="l00378"></a><span class="lineno"> 378</span> </div>
<div class="line"><a name="l00379"></a><span class="lineno"> 379</span>  <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(lit == d_litsByScores[i], <span class="stringliteral">"lit = "</span>+lit.<a class="code" href="classCVC3_1_1Literal.html#aff53e6b3e4da8c649816441046983a30">toString</a>());</div>
<div class="line"><a name="l00380"></a><span class="lineno"> 380</span>  <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(lit.<a class="code" href="classCVC3_1_1Literal.html#a49129c1ccac9ad6380af512daae84b34">added</a>(), <span class="stringliteral">"lit = "</span>+lit.<a class="code" href="classCVC3_1_1Literal.html#aff53e6b3e4da8c649816441046983a30">toString</a>());</div>
<div class="line"><a name="l00381"></a><span class="lineno"> 381</span>  <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(lit.<a class="code" href="classCVC3_1_1Literal.html#a4823b2e9ec3a6a13a28c209d22269564">count</a>()>0, <span class="stringliteral">"lit = "</span>+lit.<a class="code" href="classCVC3_1_1Literal.html#aff53e6b3e4da8c649816441046983a30">toString</a>());</div>
<div class="line"><a name="l00382"></a><span class="lineno"> 382</span> </div>
<div class="line"><a name="l00383"></a><span class="lineno"> 383</span>  count = lit.<a class="code" href="classCVC3_1_1Literal.html#a4823b2e9ec3a6a13a28c209d22269564">count</a>();</div>
<div class="line"><a name="l00384"></a><span class="lineno"> 384</span>  <span class="keywordtype">unsigned</span>& countPrev = lit.<a class="code" href="classCVC3_1_1Literal.html#ab2a9170779ff251399c8d197c5c5c8ce">countPrev</a>();</div>
<div class="line"><a name="l00385"></a><span class="lineno"> 385</span>  <span class="keywordtype">int</span>& scoreRef = lit.<a class="code" href="classCVC3_1_1Literal.html#a436c5126780bd81c31bc01a868b5b857">score</a>();</div>
<div class="line"><a name="l00386"></a><span class="lineno"> 386</span> </div>
<div class="line"><a name="l00387"></a><span class="lineno"> 387</span>  score = scoreRef/2 + count - countPrev;</div>
<div class="line"><a name="l00388"></a><span class="lineno"> 388</span>  scoreRef = score;</div>
<div class="line"><a name="l00389"></a><span class="lineno"> 389</span>  countPrev = count;</div>
<div class="line"><a name="l00390"></a><span class="lineno"> 390</span> </div>
<div class="line"><a name="l00391"></a><span class="lineno"> 391</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"search literals"</span>, <span class="stringliteral">"Updated lit["</span>+<a class="code" href="namespaceCVC3.html#af69618103f1f0f2eadada0796a2a940c">int2string</a>(i)+<span class="stringliteral">"] = "</span>, lit, <span class="stringliteral">" }"</span>);</div>
<div class="line"><a name="l00392"></a><span class="lineno"> 392</span> <span class="comment">// Literal neglit(!lit);</span></div>
<div class="line"><a name="l00393"></a><span class="lineno"> 393</span> </div>
<div class="line"><a name="l00394"></a><span class="lineno"> 394</span> <span class="comment">// count = neglit.count();</span></div>
<div class="line"><a name="l00395"></a><span class="lineno"> 395</span> <span class="comment">// unsigned& negcountPrev = neglit.countPrev();</span></div>
<div class="line"><a name="l00396"></a><span class="lineno"> 396</span> <span class="comment">// unsigned& negscoreRef = neglit.score();</span></div>
<div class="line"><a name="l00397"></a><span class="lineno"> 397</span> </div>
<div class="line"><a name="l00398"></a><span class="lineno"> 398</span> <span class="comment">// negscore = negscoreRef/2 + count - negcountPrev;</span></div>
<div class="line"><a name="l00399"></a><span class="lineno"> 399</span> <span class="comment">// negscoreRef = negscore;</span></div>
<div class="line"><a name="l00400"></a><span class="lineno"> 400</span> <span class="comment">// negcountPrev = count;</span></div>
<div class="line"><a name="l00401"></a><span class="lineno"> 401</span> </div>
<div class="line"><a name="l00402"></a><span class="lineno"> 402</span> <span class="comment">// if(negscore > score) d_litsByScores[i] = neglit;</span></div>
<div class="line"><a name="l00403"></a><span class="lineno"> 403</span>  }</div>
<div class="line"><a name="l00404"></a><span class="lineno"> 404</span>  ::stable_sort(d_litsByScores.begin(), d_litsByScores.end(), <a class="code" href="search__fast_8cpp.html#a55afec8e553f4d1c6487c4e63a0c2375" title="Total order on literals for the initial sort.">compareLits</a>);</div>
<div class="line"><a name="l00405"></a><span class="lineno"> 405</span>  d_litsMaxScorePos = 0;</div>
<div class="line"><a name="l00406"></a><span class="lineno"> 406</span>  d_litSortCount=d_litsByScores.size();</div>
<div class="line"><a name="l00407"></a><span class="lineno"> 407</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"search splitters"</span>,<span class="stringliteral">"updateLitScores => "</span>, lits2str(d_litsByScores),<span class="stringliteral">""</span>);</div>
<div class="line"><a name="l00408"></a><span class="lineno"> 408</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"search literals"</span>, <span class="stringliteral">"updateLitScores(size="</span>, d_litsByScores.size(),</div>
<div class="line"><a name="l00409"></a><span class="lineno"> 409</span>  <span class="stringliteral">") => }"</span>);</div>
<div class="line"><a name="l00410"></a><span class="lineno"> 410</span> }</div>
<div class="line"><a name="l00411"></a><span class="lineno"> 411</span> </div>
<div class="line"><a name="l00412"></a><span class="lineno"><a class="code" href="group__SE__Fast.html#ga775b06e155128cc8817f254bc293c6c6"> 412</a></span> <span class="keywordtype">void</span> <a class="code" href="group__SE__Fast.html#ga775b06e155128cc8817f254bc293c6c6" title="Add the literals of a new clause to d_litsByScores.">SearchEngineFast::updateLitCounts</a>(<span class="keyword">const</span> <a class="code" href="classCVC3_1_1Clause.html" title="A class representing a CNF clause (a smart pointer)">Clause</a>& c)</div>
<div class="line"><a name="l00413"></a><span class="lineno"> 413</span> {</div>
<div class="line"><a name="l00414"></a><span class="lineno"> 414</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"search literals"</span>, <span class="stringliteral">"updateLitCounts("</span>, <a class="code" href="classCVC3_1_1CompactClause.html">CompactClause</a>(c), <span class="stringliteral">") {"</span>);</div>
<div class="line"><a name="l00415"></a><span class="lineno"> 415</span>  <span class="keywordflow">for</span>(<span class="keywordtype">unsigned</span> i=0; i<c.<a class="code" href="classCVC3_1_1Clause.html#a7cfde40c65fc8eb4f733094fad07dfa1">size</a>(); ++i) {</div>
<div class="line"><a name="l00416"></a><span class="lineno"> 416</span>  <span class="comment">// Assign by value to modify the attributes</span></div>
<div class="line"><a name="l00417"></a><span class="lineno"> 417</span>  <a class="code" href="classCVC3_1_1Literal.html">Literal</a> lit = c[i];</div>
<div class="line"><a name="l00418"></a><span class="lineno"> 418</span>  <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(lit.<a class="code" href="classCVC3_1_1Literal.html#a4a2e0a421bfcb590c3a7964d2583a94c">getExpr</a>().<a class="code" href="group__ExprPkg.html#gaac535dae48f02fcd093a5b1b1a062211" title="Test if e is an abstract literal.">isAbsLiteral</a>(),<span class="stringliteral">"Expected literal"</span>);</div>
<div class="line"><a name="l00419"></a><span class="lineno"> 419</span>  <span class="comment">// Only add the literal if it wasn't added before. The literal</span></div>
<div class="line"><a name="l00420"></a><span class="lineno"> 420</span>  <span class="comment">// counts are taken care of in Clause constructors/destructors.</span></div>
<div class="line"><a name="l00421"></a><span class="lineno"> 421</span> <span class="comment">// if(!lit.added() || lit.count() != lit.countPrev())</span></div>
<div class="line"><a name="l00422"></a><span class="lineno"> 422</span>  <a class="code" href="group__SE__Fast.html#ga2d54fdadc1b167dbbb366e37e0b97a58" title="Internal (decrementing) count of added splitters, to sort d_litByScores.">d_litSortCount</a>--;</div>
<div class="line"><a name="l00423"></a><span class="lineno"> 423</span>  </div>
<div class="line"><a name="l00424"></a><span class="lineno"> 424</span>  <span class="keywordflow">if</span>(!lit.<a class="code" href="classCVC3_1_1Literal.html#a49129c1ccac9ad6380af512daae84b34">added</a>()) {</div>
<div class="line"><a name="l00425"></a><span class="lineno"> 425</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"search literals"</span>, <span class="stringliteral">"adding literal "</span>, lit, <span class="stringliteral">" to d_litsByScores"</span>);</div>
<div class="line"><a name="l00426"></a><span class="lineno"> 426</span>  <a class="code" href="group__SE__Fast.html#ga57c1c1e58ebd2c1d23a57db97880fbbc" title="Vector of literals sorted by score.">d_litsByScores</a>.push_back(lit);</div>
<div class="line"><a name="l00427"></a><span class="lineno"> 427</span>  lit.<a class="code" href="classCVC3_1_1Literal.html#a49129c1ccac9ad6380af512daae84b34">added</a>()=<span class="keyword">true</span>;</div>
<div class="line"><a name="l00428"></a><span class="lineno"> 428</span>  }</div>
<div class="line"><a name="l00429"></a><span class="lineno"> 429</span>  }</div>
<div class="line"><a name="l00430"></a><span class="lineno"> 430</span>  <span class="keywordflow">if</span>(<a class="code" href="group__SE__Fast.html#ga2d54fdadc1b167dbbb366e37e0b97a58" title="Internal (decrementing) count of added splitters, to sort d_litByScores.">d_litSortCount</a> < 0) {</div>
<div class="line"><a name="l00431"></a><span class="lineno"> 431</span>  ::stable_sort(<a class="code" href="group__SE__Fast.html#ga57c1c1e58ebd2c1d23a57db97880fbbc" title="Vector of literals sorted by score.">d_litsByScores</a>.begin(), <a class="code" href="group__SE__Fast.html#ga57c1c1e58ebd2c1d23a57db97880fbbc" title="Vector of literals sorted by score.">d_litsByScores</a>.end(), <a class="code" href="search__fast_8cpp.html#a55afec8e553f4d1c6487c4e63a0c2375" title="Total order on literals for the initial sort.">compareLits</a>);</div>
<div class="line"><a name="l00432"></a><span class="lineno"> 432</span>  <a class="code" href="group__SE__Fast.html#ga2d54fdadc1b167dbbb366e37e0b97a58" title="Internal (decrementing) count of added splitters, to sort d_litByScores.">d_litSortCount</a>=<a class="code" href="group__SE__Fast.html#ga57c1c1e58ebd2c1d23a57db97880fbbc" title="Vector of literals sorted by score.">d_litsByScores</a>.size();</div>
<div class="line"><a name="l00433"></a><span class="lineno"> 433</span>  }</div>
<div class="line"><a name="l00434"></a><span class="lineno"> 434</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"search splitters"</span>,<span class="stringliteral">"updateLitCounts => "</span>, lits2str(<a class="code" href="group__SE__Fast.html#ga57c1c1e58ebd2c1d23a57db97880fbbc" title="Vector of literals sorted by score.">d_litsByScores</a>),<span class="stringliteral">""</span>);</div>
<div class="line"><a name="l00435"></a><span class="lineno"> 435</span>  <a class="code" href="debug_8h.html#ad64155edafde9f067f4868817cd04bdf">TRACE_MSG</a>(<span class="stringliteral">"search literals"</span>, <span class="stringliteral">"updateLitCounts => }"</span>);</div>
<div class="line"><a name="l00436"></a><span class="lineno"> 436</span> }</div>
<div class="line"><a name="l00437"></a><span class="lineno"> 437</span> </div>
<div class="line"><a name="l00438"></a><span class="lineno"><a class="code" href="group__SE__Fast.html#ga711544b769f4c0a5713df247de927019"> 438</a></span> <a class="code" href="classCVC3_1_1Expr.html" title="Data structure of expressions in CVC3.">Expr</a> <a class="code" href="group__SE__Fast.html#ga711544b769f4c0a5713df247de927019" title="Returns a splitter.">SearchEngineFast::findSplitter</a>()</div>
<div class="line"><a name="l00439"></a><span class="lineno"> 439</span> {</div>
<div class="line"><a name="l00440"></a><span class="lineno"> 440</span>  <a class="code" href="debug_8h.html#ad64155edafde9f067f4868817cd04bdf">TRACE_MSG</a>(<span class="stringliteral">"splitters"</span>, <span class="stringliteral">"SearchEngineFast::findSplitter() {"</span>);</div>
<div class="line"><a name="l00441"></a><span class="lineno"> 441</span>  <a class="code" href="classCVC3_1_1Expr.html" title="Data structure of expressions in CVC3.">Expr</a> splitter; <span class="comment">// Null by default</span></div>
<div class="line"><a name="l00442"></a><span class="lineno"> 442</span>  <span class="keywordtype">unsigned</span> i;</div>
<div class="line"><a name="l00443"></a><span class="lineno"> 443</span> </div>
<div class="line"><a name="l00444"></a><span class="lineno"> 444</span>  <span class="comment">// if we have a conflict clause, pick the one inside with the</span></div>
<div class="line"><a name="l00445"></a><span class="lineno"> 445</span>  <span class="comment">// best ac(z) score (from the most recent conflict clause)</span></div>
<div class="line"><a name="l00446"></a><span class="lineno"> 446</span>  <span class="comment">// if (d_berkminFlag && !d_conflictClauses.empty())</span></div>
<div class="line"><a name="l00447"></a><span class="lineno"> 447</span>  <span class="keywordflow">if</span> (<a class="code" href="group__SE__Fast.html#ga3877f82445d777c19c60b6ec117335e2" title="Flag to switch on/off the berkmin heuristic.">d_berkminFlag</a> && !<a class="code" href="group__SE__Fast.html#gad79601e3b2032aee4d23dc4bbd785fc3" title="Reference to top deque of conflict clauses.">d_conflictClauses</a>->empty())</div>
<div class="line"><a name="l00448"></a><span class="lineno"> 448</span>  {</div>
<div class="line"><a name="l00449"></a><span class="lineno"> 449</span>  <span class="keywordtype">unsigned</span> sCount = 0;</div>
<div class="line"><a name="l00450"></a><span class="lineno"> 450</span>  std::deque<ClauseOwner>::reverse_iterator foundUnsat = <a class="code" href="group__SE__Fast.html#gad79601e3b2032aee4d23dc4bbd785fc3" title="Reference to top deque of conflict clauses.">d_conflictClauses</a>->rend();</div>
<div class="line"><a name="l00451"></a><span class="lineno"> 451</span>  <span class="keywordflow">for</span> (std::deque<ClauseOwner>::reverse_iterator i = <a class="code" href="group__SE__Fast.html#gad79601e3b2032aee4d23dc4bbd785fc3" title="Reference to top deque of conflict clauses.">d_conflictClauses</a>->rbegin();</div>
<div class="line"><a name="l00452"></a><span class="lineno"> 452</span>  i != <a class="code" href="group__SE__Fast.html#gad79601e3b2032aee4d23dc4bbd785fc3" title="Reference to top deque of conflict clauses.">d_conflictClauses</a>->rend();</div>
<div class="line"><a name="l00453"></a><span class="lineno"> 453</span>  ++i) {</div>
<div class="line"><a name="l00454"></a><span class="lineno"> 454</span>  ++sCount;</div>
<div class="line"><a name="l00455"></a><span class="lineno"> 455</span>  <span class="keywordflow">if</span> (!((<a class="code" href="classCVC3_1_1Clause.html" title="A class representing a CNF clause (a smart pointer)">Clause</a>)*i).sat(<span class="keyword">true</span>)) {</div>
<div class="line"><a name="l00456"></a><span class="lineno"> 456</span>  foundUnsat = i;</div>
<div class="line"><a name="l00457"></a><span class="lineno"> 457</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00458"></a><span class="lineno"> 458</span>  }</div>
<div class="line"><a name="l00459"></a><span class="lineno"> 459</span>  }</div>
<div class="line"><a name="l00460"></a><span class="lineno"> 460</span>  <span class="keywordflow">if</span> (foundUnsat != <a class="code" href="group__SE__Fast.html#gad79601e3b2032aee4d23dc4bbd785fc3" title="Reference to top deque of conflict clauses.">d_conflictClauses</a>->rend()) {</div>
<div class="line"><a name="l00461"></a><span class="lineno"> 461</span>  <a class="code" href="classCVC3_1_1Clause.html" title="A class representing a CNF clause (a smart pointer)">Clause</a> &topClause = *foundUnsat;</div>
<div class="line"><a name="l00462"></a><span class="lineno"> 462</span>  <span class="keywordtype">int</span> numLits = topClause.<a class="code" href="classCVC3_1_1Clause.html#a7cfde40c65fc8eb4f733094fad07dfa1">size</a>();</div>
<div class="line"><a name="l00463"></a><span class="lineno"> 463</span>  <span class="keywordtype">int</span> bestScore = 0;</div>
<div class="line"><a name="l00464"></a><span class="lineno"> 464</span>  <span class="keywordtype">int</span> bestLit = -1;</div>
<div class="line"><a name="l00465"></a><span class="lineno"> 465</span>  <span class="keywordtype">unsigned</span> numChoices = 0;</div>
<div class="line"><a name="l00466"></a><span class="lineno"> 466</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < numLits; ++i) {</div>
<div class="line"><a name="l00467"></a><span class="lineno"> 467</span>  <span class="keyword">const</span> <a class="code" href="classCVC3_1_1Literal.html">Literal</a>& lit = topClause[i];</div>
<div class="line"><a name="l00468"></a><span class="lineno"> 468</span>  <span class="keywordflow">if</span> (lit.<a class="code" href="classCVC3_1_1Literal.html#a48feb6e7cf83b3a59b94ca0e75627d0f">getValue</a>() != 0) <span class="keywordflow">continue</span>;</div>
<div class="line"><a name="l00469"></a><span class="lineno"> 469</span>  <span class="keywordflow">if</span> (bestLit == -1) bestLit = i;</div>
<div class="line"><a name="l00470"></a><span class="lineno"> 470</span>  ++numChoices;</div>
<div class="line"><a name="l00471"></a><span class="lineno"> 471</span>  <span class="keywordtype">int</span> s = lit.<a class="code" href="classCVC3_1_1Literal.html#a436c5126780bd81c31bc01a868b5b857">score</a>();</div>
<div class="line"><a name="l00472"></a><span class="lineno"> 472</span>  <span class="keywordflow">if</span> (s > bestScore) {</div>
<div class="line"><a name="l00473"></a><span class="lineno"> 473</span>  bestLit = i;</div>
<div class="line"><a name="l00474"></a><span class="lineno"> 474</span>  bestScore = s;</div>
<div class="line"><a name="l00475"></a><span class="lineno"> 475</span>  }</div>
<div class="line"><a name="l00476"></a><span class="lineno"> 476</span>  }</div>
<div class="line"><a name="l00477"></a><span class="lineno"> 477</span>  <span class="keywordflow">if</span> (bestLit != -1) {</div>
<div class="line"><a name="l00478"></a><span class="lineno"> 478</span>  splitter = topClause[bestLit].getExpr();</div>
<div class="line"><a name="l00479"></a><span class="lineno"> 479</span>  <a class="code" href="debug_8h.html#a600cb2d68efe7cc413cccbb5714c7016">IF_DEBUG</a>(debugger.counter(<span class="stringliteral">"BerkMin heuristic"</span>)++;)</div>
<div class="line"><a name="l00480"></a><span class="lineno"> 480</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"splitters"</span>, <span class="stringliteral">"SearchEngineFast::findSplitter()[berkmin] => "</span>,</div>
<div class="line"><a name="l00481"></a><span class="lineno"> 481</span>  splitter, <span class="stringliteral">" }"</span>); </div>
<div class="line"><a name="l00482"></a><span class="lineno"> 482</span>  <span class="keywordflow">return</span> splitter;</div>
<div class="line"><a name="l00483"></a><span class="lineno"> 483</span>  }</div>
<div class="line"><a name="l00484"></a><span class="lineno"> 484</span>  }</div>
<div class="line"><a name="l00485"></a><span class="lineno"> 485</span>  } </div>
<div class="line"><a name="l00486"></a><span class="lineno"> 486</span> </div>
<div class="line"><a name="l00487"></a><span class="lineno"> 487</span>  <span class="comment">/*</span></div>
<div class="line"><a name="l00488"></a><span class="lineno"> 488</span> <span class="comment"> // Search for DP-specific splitters</span></div>
<div class="line"><a name="l00489"></a><span class="lineno"> 489</span> <span class="comment"> for(CDMapOrdered<Splitter,bool>::iterator i=d_dpSplitters.begin(),</span></div>
<div class="line"><a name="l00490"></a><span class="lineno"> 490</span> <span class="comment"> iend=d_dpSplitters.end(); i!=iend; ++i) {</span></div>
<div class="line"><a name="l00491"></a><span class="lineno"> 491</span> <span class="comment"> Expr e((*i).first.expr);</span></div>
<div class="line"><a name="l00492"></a><span class="lineno"> 492</span> <span class="comment"> if(e.isBoolConst() || d_core->find(e).getRHS().isBoolConst())</span></div>
<div class="line"><a name="l00493"></a><span class="lineno"> 493</span> <span class="comment"> continue;</span></div>
<div class="line"><a name="l00494"></a><span class="lineno"> 494</span> <span class="comment"> return e;</span></div>
<div class="line"><a name="l00495"></a><span class="lineno"> 495</span> <span class="comment"> }</span></div>
<div class="line"><a name="l00496"></a><span class="lineno"> 496</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00497"></a><span class="lineno"> 497</span> </div>
<div class="line"><a name="l00498"></a><span class="lineno"> 498</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = <a class="code" href="group__SE__Fast.html#ga07c8e260b60d83042c97453892a15f38" title="Backtrackable list of non-literals (non-CNF formulas).">d_nonLiterals</a>.<a class="code" href="classCVC3_1_1CDList.html#adf92d0f391d73e7ac70da57db135af27">size</a>()-1; i >= 0; --i) {</div>
<div class="line"><a name="l00499"></a><span class="lineno"> 499</span>  <span class="keyword">const</span> <a class="code" href="classCVC3_1_1Expr.html" title="Data structure of expressions in CVC3.">Expr</a>& e = <a class="code" href="group__SE__Fast.html#ga07c8e260b60d83042c97453892a15f38" title="Backtrackable list of non-literals (non-CNF formulas).">d_nonLiterals</a>[i].get().getExpr();</div>
<div class="line"><a name="l00500"></a><span class="lineno"> 500</span>  <span class="keywordflow">if</span> (e.<a class="code" href="group__ExprPkg.html#gadf8596df73fa69ff8e6a22b9321f5c34">isTrue</a>()) <span class="keywordflow">continue</span>;</div>
<div class="line"><a name="l00501"></a><span class="lineno"> 501</span>  <span class="comment">// if (d_nonLiteralSimplified[thm.getExpr()]) continue;</span></div>
<div class="line"><a name="l00502"></a><span class="lineno"> 502</span>  <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(!e.<a class="code" href="group__ExprPkg.html#ga5c2cee598096c66e80d87490d6505bc4">isBoolConst</a>(), <span class="stringliteral">"Expected non-bool const"</span>);</div>
<div class="line"><a name="l00503"></a><span class="lineno"> 503</span>  <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(<a class="code" href="group__SE.html#ga3772c6af7eac91b9ed7fc278edf5ef90" title="Access to theory reasoning.">d_core</a>-><a class="code" href="classCVC3_1_1Theory.html#a9d441225b287419426c80a0374d6c6cb" title="Simplify a term e w.r.t. the current context.">simplifyExpr</a>(e) == e,</div>
<div class="line"><a name="l00504"></a><span class="lineno"> 504</span>  <span class="stringliteral">"Expected non-literal to be simplified:\n e = "</span></div>
<div class="line"><a name="l00505"></a><span class="lineno"> 505</span>  +e.<a class="code" href="group__ExprPkg.html#gaf3028bb1619f8cc69b66ec712e1adb54" title="Print the expression to a string.">toString</a>()+<span class="stringliteral">"\n simplify(e) = "</span></div>
<div class="line"><a name="l00506"></a><span class="lineno"> 506</span>  +<a class="code" href="group__SE.html#ga3772c6af7eac91b9ed7fc278edf5ef90" title="Access to theory reasoning.">d_core</a>-><a class="code" href="classCVC3_1_1Theory.html#a9d441225b287419426c80a0374d6c6cb" title="Simplify a term e w.r.t. the current context.">simplifyExpr</a>(e).<a class="code" href="group__ExprPkg.html#gaf3028bb1619f8cc69b66ec712e1adb54" title="Print the expression to a string.">toString</a>());</div>
<div class="line"><a name="l00507"></a><span class="lineno"> 507</span>  splitter = <a class="code" href="group__SE__Fast.html#gafa042a51f718c312ea7728f175958e35" title="Decision Engine.">d_decisionEngine</a>-><a class="code" href="group__DE.html#ga6f191a7f4edb645e8df7c1f005a50bf8" title="Finds a splitter inside a non const expression. The expression passed in must not be a boolean consta...">findSplitter</a>(e);</div>
<div class="line"><a name="l00508"></a><span class="lineno"> 508</span>  <span class="comment">//DebugAssert(!splitter.isNull(),</span></div>
<div class="line"><a name="l00509"></a><span class="lineno"> 509</span>  <span class="comment">// "findSplitter: can't find splitter in non-literal: "</span></div>
<div class="line"><a name="l00510"></a><span class="lineno"> 510</span>  <span class="comment">// + e.toString());</span></div>
<div class="line"><a name="l00511"></a><span class="lineno"> 511</span>  <span class="keywordflow">if</span> (splitter.isNull()) <span class="keywordflow">continue</span>;</div>
<div class="line"><a name="l00512"></a><span class="lineno"> 512</span>  <a class="code" href="debug_8h.html#a600cb2d68efe7cc413cccbb5714c7016">IF_DEBUG</a>(debugger.counter(<span class="stringliteral">"splitters from non-literals"</span>)++;) </div>
<div class="line"><a name="l00513"></a><span class="lineno"> 513</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"splitters"</span>, <span class="stringliteral">"SearchEngineFast::findSplitter()[non-lit] => "</span>,</div>
<div class="line"><a name="l00514"></a><span class="lineno"> 514</span>  splitter, <span class="stringliteral">" }"</span>); </div>
<div class="line"><a name="l00515"></a><span class="lineno"> 515</span>  <span class="keywordflow">return</span> splitter;</div>
<div class="line"><a name="l00516"></a><span class="lineno"> 516</span>  }</div>
<div class="line"><a name="l00517"></a><span class="lineno"> 517</span> </div>
<div class="line"><a name="l00518"></a><span class="lineno"> 518</span>  <span class="comment">// Update the scores: we are about to choose a splitter based on them</span></div>
<div class="line"><a name="l00519"></a><span class="lineno"> 519</span>  <span class="keywordflow">if</span> (<a class="code" href="group__SE__Fast.html#ga52c9c181bcd623a36ab594e0ee16a67e" title="Internal splitter counter for delaying updateLitScores()">d_splitterCount</a> <= 0) {</div>
<div class="line"><a name="l00520"></a><span class="lineno"> 520</span>  <a class="code" href="group__SE__Fast.html#ga7311848b70f91fad18ca95b7347749cb">updateLitScores</a>(<span class="keyword">false</span>);</div>
<div class="line"><a name="l00521"></a><span class="lineno"> 521</span> <span class="comment">// d_splitterCount = d_litsByScores.size();</span></div>
<div class="line"><a name="l00522"></a><span class="lineno"> 522</span> <span class="comment">// if(d_splitterCount > 100)</span></div>
<div class="line"><a name="l00523"></a><span class="lineno"> 523</span>  <a class="code" href="group__SE__Fast.html#ga52c9c181bcd623a36ab594e0ee16a67e" title="Internal splitter counter for delaying updateLitScores()">d_splitterCount</a> = 0x10;</div>
<div class="line"><a name="l00524"></a><span class="lineno"> 524</span>  } <span class="keywordflow">else</span></div>
<div class="line"><a name="l00525"></a><span class="lineno"> 525</span>  <a class="code" href="group__SE__Fast.html#ga52c9c181bcd623a36ab594e0ee16a67e" title="Internal splitter counter for delaying updateLitScores()">d_splitterCount</a>--;</div>
<div class="line"><a name="l00526"></a><span class="lineno"> 526</span>  <span class="comment">// pick splitter based on score</span></div>
<div class="line"><a name="l00527"></a><span class="lineno"> 527</span>  <span class="keywordflow">for</span> (i=d_litsMaxScorePos; i<<a class="code" href="group__SE__Fast.html#ga57c1c1e58ebd2c1d23a57db97880fbbc" title="Vector of literals sorted by score.">d_litsByScores</a>.size(); ++i) {</div>
<div class="line"><a name="l00528"></a><span class="lineno"> 528</span>  <span class="keyword">const</span> <a class="code" href="classCVC3_1_1Literal.html">Literal</a>& splitterLit = <a class="code" href="group__SE__Fast.html#ga57c1c1e58ebd2c1d23a57db97880fbbc" title="Vector of literals sorted by score.">d_litsByScores</a>[i];</div>
<div class="line"><a name="l00529"></a><span class="lineno"> 529</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"search splitters"</span>, <span class="stringliteral">"d_litsByScores["</span>+<a class="code" href="namespaceCVC3.html#af69618103f1f0f2eadada0796a2a940c">int2string</a>(i)+<span class="stringliteral">"] = "</span>,</div>
<div class="line"><a name="l00530"></a><span class="lineno"> 530</span>  splitterLit,<span class="stringliteral">""</span>);</div>
<div class="line"><a name="l00531"></a><span class="lineno"> 531</span>  <span class="comment">//if (d_core->simplifyExpr(splitter).isBoolConst()) continue;</span></div>
<div class="line"><a name="l00532"></a><span class="lineno"> 532</span>  <span class="keywordflow">if</span>(splitterLit.<a class="code" href="classCVC3_1_1Literal.html#a48feb6e7cf83b3a59b94ca0e75627d0f">getValue</a>() != 0) <span class="keywordflow">continue</span>;</div>
<div class="line"><a name="l00533"></a><span class="lineno"> 533</span>  splitter = splitterLit.<a class="code" href="classCVC3_1_1Literal.html#a4a2e0a421bfcb590c3a7964d2583a94c">getExpr</a>();</div>
<div class="line"><a name="l00534"></a><span class="lineno"> 534</span>  <span class="comment">// Skip auxiliary CNF vars</span></div>
<div class="line"><a name="l00535"></a><span class="lineno"> 535</span>  <span class="keywordflow">if</span>(!<a class="code" href="group__SE.html#gaed4079f44a18e496b87366ce65b20d99" title="Check if a splitter is required for completeness.">isGoodSplitter</a>(splitter)) <span class="keywordflow">continue</span>;</div>
<div class="line"><a name="l00536"></a><span class="lineno"> 536</span>  d_litsMaxScorePos = i+1;</div>
<div class="line"><a name="l00537"></a><span class="lineno"> 537</span>  <a class="code" href="debug_8h.html#a600cb2d68efe7cc413cccbb5714c7016">IF_DEBUG</a>(debugger.counter(<span class="stringliteral">"splitters from literals"</span>)++;)</div>
<div class="line"><a name="l00538"></a><span class="lineno"> 538</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"splitters"</span>, <span class="stringliteral">"d_litsMaxScorePos: "</span>, d_litsMaxScorePos, <span class="stringliteral">""</span>);</div>
<div class="line"><a name="l00539"></a><span class="lineno"> 539</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"splitters"</span>, <span class="stringliteral">"SearchEngineFast::findSplitter()[lit] => "</span>,</div>
<div class="line"><a name="l00540"></a><span class="lineno"> 540</span>  splitter, <span class="stringliteral">" }"</span>); </div>
<div class="line"><a name="l00541"></a><span class="lineno"> 541</span>  <span class="keywordflow">return</span> splitter;</div>
<div class="line"><a name="l00542"></a><span class="lineno"> 542</span>  }</div>
<div class="line"><a name="l00543"></a><span class="lineno"> 543</span>  <a class="code" href="debug_8h.html#ad64155edafde9f067f4868817cd04bdf">TRACE_MSG</a>(<span class="stringliteral">"splitters"</span>,</div>
<div class="line"><a name="l00544"></a><span class="lineno"> 544</span>  <span class="stringliteral">"SearchEngineFast::findSplitter()[not found] => Null }"</span>);</div>
<div class="line"><a name="l00545"></a><span class="lineno"> 545</span>  <span class="keywordflow">return</span> <a class="code" href="classCVC3_1_1Expr.html" title="Data structure of expressions in CVC3.">Expr</a>();</div>
<div class="line"><a name="l00546"></a><span class="lineno"> 546</span> }</div>
<div class="line"><a name="l00547"></a><span class="lineno"> 547</span> </div>
<div class="line"><a name="l00548"></a><span class="lineno"> 548</span> </div>
<div class="line"><a name="l00549"></a><span class="lineno"><a class="code" href="group__SE__Fast.html#ga2ec0e19a01ac0926b690c50a3206c5a3"> 549</a></span> <span class="keywordtype">void</span> <a class="code" href="group__SE__Fast.html#ga2ec0e19a01ac0926b690c50a3206c5a3" title="Process a new derived fact (auxiliary function)">SearchEngineFast::recordFact</a>(<span class="keyword">const</span> <a class="code" href="classCVC3_1_1Theorem.html">Theorem</a>& thm)</div>
<div class="line"><a name="l00550"></a><span class="lineno"> 550</span> {</div>
<div class="line"><a name="l00551"></a><span class="lineno"> 551</span>  <a class="code" href="classCVC3_1_1Literal.html">Literal</a> l(<a class="code" href="group__SE.html#gaf0dbbb1806723760ab8744e96a8c6657" title="Construct a Literal out of an Expr or return an existing one.">newLiteral</a>(thm.<a class="code" href="classCVC3_1_1Theorem.html#af2b97ae5d270ddf1013bf4f3867a7e5d">getExpr</a>()));</div>
<div class="line"><a name="l00552"></a><span class="lineno"> 552</span>  <span class="keywordflow">if</span>(l.<a class="code" href="classCVC3_1_1Literal.html#a48feb6e7cf83b3a59b94ca0e75627d0f">getValue</a>() == 0) {</div>
<div class="line"><a name="l00553"></a><span class="lineno"> 553</span>  l.<a class="code" href="classCVC3_1_1Literal.html#ad731e76b4037cb3e5d797543596514a1">setValue</a>(thm, thm.<a class="code" href="classCVC3_1_1Theorem.html#a112466d9793abcf97015233ffdc4ec5e">getScope</a>());</div>
<div class="line"><a name="l00554"></a><span class="lineno"> 554</span>  <a class="code" href="debug_8h.html#a600cb2d68efe7cc413cccbb5714c7016">IF_DEBUG</a>(debugger.counter(<span class="stringliteral">"recordFact adds unreported lit"</span>)++;)</div>
<div class="line"><a name="l00555"></a><span class="lineno"> 555</span>  <a class="code" href="group__SE__Fast.html#gabe8dbaf4592793c49cd58ff93a897a06" title="Backtrackable set of pending unprocessed literals.">d_unreportedLits</a>.<a class="code" href="classCVC3_1_1CDMap.html#a664a15046de83b0af599f488cb420022">insert</a>(l.<a class="code" href="classCVC3_1_1Literal.html#a4a2e0a421bfcb590c3a7964d2583a94c">getExpr</a>(),thm,thm.<a class="code" href="classCVC3_1_1Theorem.html#a112466d9793abcf97015233ffdc4ec5e">getScope</a>());</div>
<div class="line"><a name="l00556"></a><span class="lineno"> 556</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (l.<a class="code" href="classCVC3_1_1Literal.html#a48feb6e7cf83b3a59b94ca0e75627d0f">getValue</a>() == 1 && l.<a class="code" href="classCVC3_1_1Literal.html#a2abe99239ecdf75235e242282cd672f2">getScope</a>() > thm.<a class="code" href="classCVC3_1_1Theorem.html#a112466d9793abcf97015233ffdc4ec5e">getScope</a>()) {</div>
<div class="line"><a name="l00557"></a><span class="lineno"> 557</span>  <span class="comment">// Cannot do this, it will trigger DebugAssert</span></div>
<div class="line"><a name="l00558"></a><span class="lineno"> 558</span>  <span class="comment">// l.setValue(thm,thm.getScope());</span></div>
<div class="line"><a name="l00559"></a><span class="lineno"> 559</span>  <a class="code" href="debug_8h.html#a600cb2d68efe7cc413cccbb5714c7016">IF_DEBUG</a>(debugger.counter(<span class="stringliteral">"recordFact adds unreported lit"</span>)++;)</div>
<div class="line"><a name="l00560"></a><span class="lineno"> 560</span>  <a class="code" href="group__SE__Fast.html#gabe8dbaf4592793c49cd58ff93a897a06" title="Backtrackable set of pending unprocessed literals.">d_unreportedLits</a>.<a class="code" href="classCVC3_1_1CDMap.html#a664a15046de83b0af599f488cb420022">insert</a>(l.<a class="code" href="classCVC3_1_1Literal.html#a4a2e0a421bfcb590c3a7964d2583a94c">getExpr</a>(),thm,thm.<a class="code" href="classCVC3_1_1Theorem.html#a112466d9793abcf97015233ffdc4ec5e">getScope</a>());</div>
<div class="line"><a name="l00561"></a><span class="lineno"> 561</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(l.<a class="code" href="classCVC3_1_1Literal.html#a48feb6e7cf83b3a59b94ca0e75627d0f">getValue</a>() < 0) { <span class="comment">// Contradiction, bcp will die anyway</span></div>
<div class="line"><a name="l00562"></a><span class="lineno"> 562</span>  <span class="keywordflow">if</span>(l.<a class="code" href="classCVC3_1_1Literal.html#aad653dd8534feb823b9d30f060b4e181">isNegative</a>())</div>
<div class="line"><a name="l00563"></a><span class="lineno"> 563</span>  <a class="code" href="group__SE__Fast.html#ga33ff53b3eeb9811b1510fffd3cdcf234" title="Set the context inconsistent. Takes Theorem(FALSE).">setInconsistent</a>(<a class="code" href="group__SE.html#ga63f2a3cfcfa86820bea2f45cb890cc1c" title="Common proof rules.">d_commonRules</a>-><a class="code" href="classCVC3_1_1CommonProofRules.html#a1074822d52c22daacaa78b34ac0635ba">contradictionRule</a>(l.<a class="code" href="classCVC3_1_1Literal.html#a9d040e10a412d4a86642a9b2776dd258">deriveTheorem</a>(), thm));</div>
<div class="line"><a name="l00564"></a><span class="lineno"> 564</span>  <span class="keywordflow">else</span></div>
<div class="line"><a name="l00565"></a><span class="lineno"> 565</span>  <a class="code" href="group__SE__Fast.html#ga33ff53b3eeb9811b1510fffd3cdcf234" title="Set the context inconsistent. Takes Theorem(FALSE).">setInconsistent</a>(<a class="code" href="group__SE.html#ga63f2a3cfcfa86820bea2f45cb890cc1c" title="Common proof rules.">d_commonRules</a>-><a class="code" href="classCVC3_1_1CommonProofRules.html#a1074822d52c22daacaa78b34ac0635ba">contradictionRule</a>(thm, l.<a class="code" href="classCVC3_1_1Literal.html#a9d040e10a412d4a86642a9b2776dd258">deriveTheorem</a>()));</div>
<div class="line"><a name="l00566"></a><span class="lineno"> 566</span>  }</div>
<div class="line"><a name="l00567"></a><span class="lineno"> 567</span>  <span class="comment">//else if (thm.getScope() < scopeLevel())</span></div>
<div class="line"><a name="l00568"></a><span class="lineno"> 568</span>  <span class="comment">// d_unreportedLits.insert(l.getExpr(),l,thm.getScope());</span></div>
<div class="line"><a name="l00569"></a><span class="lineno"> 569</span>  </div>
<div class="line"><a name="l00570"></a><span class="lineno"> 570</span> }</div>
<div class="line"><a name="l00571"></a><span class="lineno"> 571</span> </div>
<div class="line"><a name="l00572"></a><span class="lineno"> 572</span> <span class="preprocessor">#ifdef _CVC3_DEBUG_MODE</span></div>
<div class="line"><a name="l00573"></a><span class="lineno"> 573</span> <span class="preprocessor"></span><span class="keywordtype">void</span> SearchEngineFast::fullCheck()</div>
<div class="line"><a name="l00574"></a><span class="lineno"> 574</span> {</div>
<div class="line"><a name="l00575"></a><span class="lineno"> 575</span>  <span class="keywordflow">for</span> (<span class="keywordtype">unsigned</span> i = 0;</div>
<div class="line"><a name="l00576"></a><span class="lineno"> 576</span>  i < <a class="code" href="group__SE__Fast.html#gaa1dd9a29eac4c7da6c669d7888909ca5" title="Backtrackable list of clauses.">d_clauses</a>.<a class="code" href="classCVC3_1_1CDList.html#adf92d0f391d73e7ac70da57db135af27">size</a>();</div>
<div class="line"><a name="l00577"></a><span class="lineno"> 577</span>  ++i) {</div>
<div class="line"><a name="l00578"></a><span class="lineno"> 578</span>  <span class="keywordflow">if</span> (!((<a class="code" href="classCVC3_1_1Clause.html" title="A class representing a CNF clause (a smart pointer)">Clause</a>)<a class="code" href="group__SE__Fast.html#gaa1dd9a29eac4c7da6c669d7888909ca5" title="Backtrackable list of clauses.">d_clauses</a>[i]).sat()) {</div>
<div class="line"><a name="l00579"></a><span class="lineno"> 579</span>  <span class="keywordtype">bool</span> sat = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00580"></a><span class="lineno"> 580</span>  <span class="keyword">const</span> <a class="code" href="classCVC3_1_1Clause.html" title="A class representing a CNF clause (a smart pointer)">Clause</a> &theClause = <a class="code" href="group__SE__Fast.html#gaa1dd9a29eac4c7da6c669d7888909ca5" title="Backtrackable list of clauses.">d_clauses</a>[i];</div>
<div class="line"><a name="l00581"></a><span class="lineno"> 581</span>  <span class="keywordtype">unsigned</span> numLits = theClause.<a class="code" href="classCVC3_1_1Clause.html#a7cfde40c65fc8eb4f733094fad07dfa1">size</a>();</div>
<div class="line"><a name="l00582"></a><span class="lineno"> 582</span>  <span class="keywordtype">unsigned</span> numChoices = 0;</div>
<div class="line"><a name="l00583"></a><span class="lineno"> 583</span>  <span class="keywordflow">for</span> (<span class="keywordtype">unsigned</span> j = 0; !sat && j < numLits; ++j) {</div>
<div class="line"><a name="l00584"></a><span class="lineno"> 584</span>  <span class="keywordflow">if</span> (theClause[j].<a class="code" href="group__SE.html#gadf867c70d67d05d72a11895a2cc13971">getValue</a>() == 0)</div>
<div class="line"><a name="l00585"></a><span class="lineno"> 585</span>  ++numChoices;</div>
<div class="line"><a name="l00586"></a><span class="lineno"> 586</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (theClause[j].<a class="code" href="group__SE.html#gadf867c70d67d05d72a11895a2cc13971">getValue</a>() == 1)</div>
<div class="line"><a name="l00587"></a><span class="lineno"> 587</span>  sat = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00588"></a><span class="lineno"> 588</span>  }</div>
<div class="line"><a name="l00589"></a><span class="lineno"> 589</span>  <span class="keywordflow">if</span> (sat) <span class="keywordflow">continue</span>;</div>
<div class="line"><a name="l00590"></a><span class="lineno"> 590</span>  <span class="keywordflow">if</span> (numChoices <= 1 || !theClause.wpCheck()) {</div>
<div class="line"><a name="l00591"></a><span class="lineno"> 591</span>  CVC3::debugger.getOS() << <a class="code" href="classCVC3_1_1CompactClause.html">CompactClause</a>(theClause) << <a class="code" href="group__ExprStream__Manip.html#ga05b0ea7353ec24fa8e7e272d7a7875d8" title="Print the end-of-line.">endl</a>;</div>
<div class="line"><a name="l00592"></a><span class="lineno"> 592</span>  CVC3::debugger.getOS() << theClause.<a class="code" href="classCVC3_1_1Clause.html#a97eeb3430667cd3c05a3c977d7285102">toString</a>() << <a class="code" href="group__ExprStream__Manip.html#ga05b0ea7353ec24fa8e7e272d7a7875d8" title="Print the end-of-line.">endl</a>;</div>
<div class="line"><a name="l00593"></a><span class="lineno"> 593</span>  }</div>
<div class="line"><a name="l00594"></a><span class="lineno"> 594</span>  <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(numChoices > 1, <span class="stringliteral">"BCP postcondition violated: unsat or unit clause(s)"</span>);</div>
<div class="line"><a name="l00595"></a><span class="lineno"> 595</span>  <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(theClause.wpCheck(), <span class="stringliteral">"Watchpointers broken"</span>);</div>
<div class="line"><a name="l00596"></a><span class="lineno"> 596</span>  }</div>
<div class="line"><a name="l00597"></a><span class="lineno"> 597</span>  }</div>
<div class="line"><a name="l00598"></a><span class="lineno"> 598</span> </div>
<div class="line"><a name="l00599"></a><span class="lineno"> 599</span>  <span class="keywordflow">if</span> (!<a class="code" href="group__SE__Fast.html#gad79601e3b2032aee4d23dc4bbd785fc3" title="Reference to top deque of conflict clauses.">d_conflictClauses</a>->empty())</div>
<div class="line"><a name="l00600"></a><span class="lineno"> 600</span>  {</div>
<div class="line"><a name="l00601"></a><span class="lineno"> 601</span>  <span class="keywordflow">for</span> (std::deque<ClauseOwner>::reverse_iterator i = <a class="code" href="group__SE__Fast.html#gad79601e3b2032aee4d23dc4bbd785fc3" title="Reference to top deque of conflict clauses.">d_conflictClauses</a>->rbegin();</div>
<div class="line"><a name="l00602"></a><span class="lineno"> 602</span>  i != <a class="code" href="group__SE__Fast.html#gad79601e3b2032aee4d23dc4bbd785fc3" title="Reference to top deque of conflict clauses.">d_conflictClauses</a>->rend();</div>
<div class="line"><a name="l00603"></a><span class="lineno"> 603</span>  ++i) {</div>
<div class="line"><a name="l00604"></a><span class="lineno"> 604</span>  <span class="keywordflow">if</span> (!((<a class="code" href="classCVC3_1_1Clause.html" title="A class representing a CNF clause (a smart pointer)">Clause</a>)*i).sat()) {</div>
<div class="line"><a name="l00605"></a><span class="lineno"> 605</span>  <span class="keywordtype">bool</span> sat = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00606"></a><span class="lineno"> 606</span>  <a class="code" href="classCVC3_1_1Clause.html" title="A class representing a CNF clause (a smart pointer)">Clause</a> &theClause = *i;</div>
<div class="line"><a name="l00607"></a><span class="lineno"> 607</span>  <span class="keywordtype">unsigned</span> numLits = theClause.<a class="code" href="classCVC3_1_1Clause.html#a7cfde40c65fc8eb4f733094fad07dfa1">size</a>();</div>
<div class="line"><a name="l00608"></a><span class="lineno"> 608</span>  <span class="keywordtype">unsigned</span> numChoices = 0;</div>
<div class="line"><a name="l00609"></a><span class="lineno"> 609</span>  <span class="keywordflow">for</span> (<span class="keywordtype">unsigned</span> j = 0; !sat && j < numLits; ++j) {</div>
<div class="line"><a name="l00610"></a><span class="lineno"> 610</span>  <span class="keywordflow">if</span> (theClause[j].<a class="code" href="group__SE.html#gadf867c70d67d05d72a11895a2cc13971">getValue</a>() == 0)</div>
<div class="line"><a name="l00611"></a><span class="lineno"> 611</span>  ++numChoices; </div>
<div class="line"><a name="l00612"></a><span class="lineno"> 612</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (theClause[j].<a class="code" href="group__SE.html#gadf867c70d67d05d72a11895a2cc13971">getValue</a>() == 1)</div>
<div class="line"><a name="l00613"></a><span class="lineno"> 613</span>  sat = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00614"></a><span class="lineno"> 614</span>  }</div>
<div class="line"><a name="l00615"></a><span class="lineno"> 615</span>  <span class="keywordflow">if</span> (sat) <span class="keywordflow">continue</span>;</div>
<div class="line"><a name="l00616"></a><span class="lineno"> 616</span>  <span class="keywordflow">if</span> (numChoices <= 1 || !theClause.wpCheck()) {</div>
<div class="line"><a name="l00617"></a><span class="lineno"> 617</span>  CVC3::debugger.getOS() << <a class="code" href="classCVC3_1_1CompactClause.html">CompactClause</a>(theClause) << <a class="code" href="group__ExprStream__Manip.html#ga05b0ea7353ec24fa8e7e272d7a7875d8" title="Print the end-of-line.">endl</a>;</div>
<div class="line"><a name="l00618"></a><span class="lineno"> 618</span>  CVC3::debugger.getOS() << theClause.<a class="code" href="classCVC3_1_1Clause.html#a97eeb3430667cd3c05a3c977d7285102">toString</a>() << <a class="code" href="group__ExprStream__Manip.html#ga05b0ea7353ec24fa8e7e272d7a7875d8" title="Print the end-of-line.">endl</a>;</div>
<div class="line"><a name="l00619"></a><span class="lineno"> 619</span>  }</div>
<div class="line"><a name="l00620"></a><span class="lineno"> 620</span>  </div>
<div class="line"><a name="l00621"></a><span class="lineno"> 621</span>  <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(numChoices > 1, <span class="stringliteral">"BCP postcondition violated: unsat or unit conflict clause(s)"</span>);</div>
<div class="line"><a name="l00622"></a><span class="lineno"> 622</span>  <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(theClause.wpCheck(), <span class="stringliteral">"Watchpointers broken"</span>);</div>
<div class="line"><a name="l00623"></a><span class="lineno"> 623</span>  </div>
<div class="line"><a name="l00624"></a><span class="lineno"> 624</span>  }</div>
<div class="line"><a name="l00625"></a><span class="lineno"> 625</span>  }</div>
<div class="line"><a name="l00626"></a><span class="lineno"> 626</span>  } </div>
<div class="line"><a name="l00627"></a><span class="lineno"> 627</span> }</div>
<div class="line"><a name="l00628"></a><span class="lineno"> 628</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00629"></a><span class="lineno"> 629</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00630"></a><span class="lineno"> 630</span> </div>
<div class="line"><a name="l00631"></a><span class="lineno"><a class="code" href="group__SE__Fast.html#gadf72861b6482f6c585f3199d1436f7be"> 631</a></span> <span class="keywordtype">void</span> <a class="code" href="group__SE__Fast.html#gadf72861b6482f6c585f3199d1436f7be" title="Clear the list of asserted literals (d_literals)">SearchEngineFast::clearLiterals</a>() {</div>
<div class="line"><a name="l00632"></a><span class="lineno"> 632</span>  <a class="code" href="debug_8h.html#ad64155edafde9f067f4868817cd04bdf">TRACE_MSG</a>(<span class="stringliteral">"search literals"</span>, <span class="stringliteral">"clearLiterals()"</span>);</div>
<div class="line"><a name="l00633"></a><span class="lineno"> 633</span>  <a class="code" href="group__SE__Fast.html#gaa6a69bd3df4bb72abd1e9b0fe868fc0d" title="Set of literals to be processed by bcp.">d_literals</a>.clear();</div>
<div class="line"><a name="l00634"></a><span class="lineno"> 634</span> }</div>
<div class="line"><a name="l00635"></a><span class="lineno"> 635</span> </div>
<div class="line"><a name="l00636"></a><span class="lineno"> 636</span> </div>
<div class="line"><a name="l00637"></a><span class="lineno"><a class="code" href="group__SE__Fast.html#gac6d49471ba5c76fffc7581e01e423218"> 637</a></span> <span class="keywordtype">bool</span> <a class="code" href="group__SE__Fast.html#gac6d49471ba5c76fffc7581e01e423218" title="Boolean constraint propagation.">SearchEngineFast::bcp</a>()</div>
<div class="line"><a name="l00638"></a><span class="lineno"> 638</span> {</div>
<div class="line"><a name="l00639"></a><span class="lineno"> 639</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"search bcp"</span>, <span class="stringliteral">"bcp@"</span>+<a class="code" href="namespaceCVC3.html#af69618103f1f0f2eadada0796a2a940c">int2string</a>(<a class="code" href="group__SE.html#gab267d9f29c30c8e26b5c7bcc4d15306a" title="Return the current scope level (for convenience)">scopeLevel</a>())+<span class="stringliteral">"(#lits="</span>,</div>
<div class="line"><a name="l00640"></a><span class="lineno"> 640</span>  <a class="code" href="group__SE__Fast.html#gaa6a69bd3df4bb72abd1e9b0fe868fc0d" title="Set of literals to be processed by bcp.">d_literals</a>.size(), <span class="stringliteral">") {"</span>);</div>
<div class="line"><a name="l00641"></a><span class="lineno"> 641</span>  <a class="code" href="debug_8h.html#a600cb2d68efe7cc413cccbb5714c7016">IF_DEBUG</a>(<a class="code" href="debug_8h.html#ad64155edafde9f067f4868817cd04bdf">TRACE_MSG</a>(<span class="stringliteral">"search bcp"</span>, <span class="stringliteral">"literals=[\n"</span>);</div>
<div class="line"><a name="l00642"></a><span class="lineno"> 642</span>  <span class="keywordflow">for</span>(<span class="keywordtype">size_t</span> i=0,iend=<a class="code" href="group__SE__Fast.html#gaa6a69bd3df4bb72abd1e9b0fe868fc0d" title="Set of literals to be processed by bcp.">d_literals</a>.size(); i<iend; i++)</div>
<div class="line"><a name="l00643"></a><span class="lineno"> 643</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"search bcp"</span>, <span class="stringliteral">" "</span>, <a class="code" href="group__SE__Fast.html#gaa6a69bd3df4bb72abd1e9b0fe868fc0d" title="Set of literals to be processed by bcp.">d_literals</a>[i], <span class="stringliteral">","</span>);</div>
<div class="line"><a name="l00644"></a><span class="lineno"> 644</span>  <a class="code" href="debug_8h.html#ad64155edafde9f067f4868817cd04bdf">TRACE_MSG</a>(<span class="stringliteral">"search bcp"</span>, <span class="stringliteral">"]"</span>);)</div>
<div class="line"><a name="l00645"></a><span class="lineno"> 645</span>  <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(<a class="code" href="group__SE__Fast.html#ga4b05dccebac3de019dc112ab3dffc988" title="Queue of derived facts to be sent to DPs.">d_factQueue</a>.empty(), <span class="stringliteral">"bcp(): start"</span>);</div>
<div class="line"><a name="l00646"></a><span class="lineno"> 646</span>  <span class="keywordtype">bool</span> newInfo = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00647"></a><span class="lineno"> 647</span>  <span class="comment">/*</span></div>
<div class="line"><a name="l00648"></a><span class="lineno"> 648</span> <span class="comment"> CDMap<Expr,Theorem>::iterator i = d_unreportedLits.begin(),</span></div>
<div class="line"><a name="l00649"></a><span class="lineno"> 649</span> <span class="comment"> iend = d_unreportedLits.end();</span></div>
<div class="line"><a name="l00650"></a><span class="lineno"> 650</span> <span class="comment"> for (; i != iend; ++i) {</span></div>
<div class="line"><a name="l00651"></a><span class="lineno"> 651</span> <span class="comment"> if (d_unreportedLitsHandled[(*i).first])</span></div>
<div class="line"><a name="l00652"></a><span class="lineno"> 652</span> <span class="comment"> continue;</span></div>
<div class="line"><a name="l00653"></a><span class="lineno"> 653</span> <span class="comment"> Theorem thm((*i).second);</span></div>
<div class="line"><a name="l00654"></a><span class="lineno"> 654</span> <span class="comment"> Literal l(newLiteral(thm.getExpr()));</span></div>
<div class="line"><a name="l00655"></a><span class="lineno"> 655</span> <span class="comment"> DebugAssert(l.getValue() != -1, "Bad unreported literal: "+l.toString());</span></div>
<div class="line"><a name="l00656"></a><span class="lineno"> 656</span> <span class="comment"> if(l.getValue() == 0) l.setValue(thm, scopeLevel());</span></div>
<div class="line"><a name="l00657"></a><span class="lineno"> 657</span> <span class="comment"> IF_DEBUG(debugger.counter("re-assert unreported lits")++;)</span></div>
<div class="line"><a name="l00658"></a><span class="lineno"> 658</span> <span class="comment"> DebugAssert(l.getExpr().isAbsLiteral(),</span></div>
<div class="line"><a name="l00659"></a><span class="lineno"> 659</span> <span class="comment"> "bcp(): pushing non-literal to d_literals:\n "</span></div>
<div class="line"><a name="l00660"></a><span class="lineno"> 660</span> <span class="comment"> +l.getExpr().toString());</span></div>
<div class="line"><a name="l00661"></a><span class="lineno"> 661</span> <span class="comment"> // The literal may be set to 1, but not on the list; push it here</span></div>
<div class="line"><a name="l00662"></a><span class="lineno"> 662</span> <span class="comment"> // explicitly</span></div>
<div class="line"><a name="l00663"></a><span class="lineno"> 663</span> <span class="comment"> d_literals.push_back(l);</span></div>
<div class="line"><a name="l00664"></a><span class="lineno"> 664</span> <span class="comment"> //recordFact((*i).second.getTheorem());</span></div>
<div class="line"><a name="l00665"></a><span class="lineno"> 665</span> <span class="comment"> enqueueFact(thm);</span></div>
<div class="line"><a name="l00666"></a><span class="lineno"> 666</span> <span class="comment"> d_unreportedLitsHandled[(*i).first] = true;</span></div>
<div class="line"><a name="l00667"></a><span class="lineno"> 667</span> <span class="comment"> }</span></div>
<div class="line"><a name="l00668"></a><span class="lineno"> 668</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00669"></a><span class="lineno"> 669</span>  <span class="keywordflow">while</span> (newInfo) {</div>
<div class="line"><a name="l00670"></a><span class="lineno"> 670</span>  <a class="code" href="debug_8h.html#a600cb2d68efe7cc413cccbb5714c7016">IF_DEBUG</a>(debugger.counter(<span class="stringliteral">"BCP: while(newInfo)"</span>)++;)</div>
<div class="line"><a name="l00671"></a><span class="lineno"> 671</span>  <a class="code" href="debug_8h.html#ad64155edafde9f067f4868817cd04bdf">TRACE_MSG</a>(<span class="stringliteral">"search bcp"</span>, <span class="stringliteral">"while(newInfo) {"</span>);</div>
<div class="line"><a name="l00672"></a><span class="lineno"> 672</span>  newInfo = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00673"></a><span class="lineno"> 673</span>  <span class="keywordflow">while</span>(!<a class="code" href="group__SE.html#ga3772c6af7eac91b9ed7fc278edf5ef90" title="Access to theory reasoning.">d_core</a>-><a class="code" href="classCVC3_1_1TheoryCore.html#a289340e4457a79f1101f37c3a07a49ed" title="Check if the current context is inconsistent.">inconsistent</a>() && <a class="code" href="group__SE__Fast.html#gaa6a69bd3df4bb72abd1e9b0fe868fc0d" title="Set of literals to be processed by bcp.">d_literals</a>.size() > 0) {</div>
<div class="line"><a name="l00674"></a><span class="lineno"> 674</span>  <span class="keywordflow">for</span>(<span class="keywordtype">unsigned</span> i=0; !<a class="code" href="group__SE.html#ga3772c6af7eac91b9ed7fc278edf5ef90" title="Access to theory reasoning.">d_core</a>-><a class="code" href="classCVC3_1_1TheoryCore.html#a289340e4457a79f1101f37c3a07a49ed" title="Check if the current context is inconsistent.">inconsistent</a>() && i<<a class="code" href="group__SE__Fast.html#gaa6a69bd3df4bb72abd1e9b0fe868fc0d" title="Set of literals to be processed by bcp.">d_literals</a>.size(); ++i) {</div>
<div class="line"><a name="l00675"></a><span class="lineno"> 675</span>  <a class="code" href="classCVC3_1_1Literal.html">Literal</a> l = <a class="code" href="group__SE__Fast.html#gaa6a69bd3df4bb72abd1e9b0fe868fc0d" title="Set of literals to be processed by bcp.">d_literals</a>[i];</div>
<div class="line"><a name="l00676"></a><span class="lineno"> 676</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"search props"</span>, <span class="stringliteral">"Propagating literal: ["</span>, l.<a class="code" href="classCVC3_1_1Literal.html#aff53e6b3e4da8c649816441046983a30">toString</a>(), <span class="stringliteral">"]"</span>);</div>
<div class="line"><a name="l00677"></a><span class="lineno"> 677</span>  <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(l.<a class="code" href="classCVC3_1_1Literal.html#a48feb6e7cf83b3a59b94ca0e75627d0f">getValue</a>() == 1, <span class="stringliteral">"Bad literal is d_literals: "</span></div>
<div class="line"><a name="l00678"></a><span class="lineno"> 678</span>  +l.<a class="code" href="classCVC3_1_1Literal.html#aff53e6b3e4da8c649816441046983a30">toString</a>());</div>
<div class="line"><a name="l00679"></a><span class="lineno"> 679</span>  <a class="code" href="group__SE__Fast.html#ga0214c0205e48fd792c4d01d3428cd333" title="Set of alive literals that shouldn't be garbage-collected.">d_litsAlive</a>.<a class="code" href="classCVC3_1_1CDList.html#aa1e8d3591c596d1b9c585dec955b519b">push_back</a>(l);</div>
<div class="line"><a name="l00680"></a><span class="lineno"> 680</span>  <span class="comment">// Use the watch pointers to find more literals to assert. Repeat</span></div>
<div class="line"><a name="l00681"></a><span class="lineno"> 681</span>  <span class="comment">// until conflict. Once conflict found, call unsatClause() to</span></div>
<div class="line"><a name="l00682"></a><span class="lineno"> 682</span>  <span class="comment">// assert the contradiction.</span></div>
<div class="line"><a name="l00683"></a><span class="lineno"> 683</span>  std::vector<std::pair<Clause, int> >& wps = <a class="code" href="group__SE__Fast.html#ga8f4353c8f8c65ed00806861471bd857f" title="Return a ref to the vector of watched literals. If no such vector exists, create it.">wp</a>(l);</div>
<div class="line"><a name="l00684"></a><span class="lineno"> 684</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"search props"</span>, <span class="stringliteral">"Appears in "</span>, wps.size(), <span class="stringliteral">" clauses."</span>);</div>
<div class="line"><a name="l00685"></a><span class="lineno"> 685</span>  <span class="keywordflow">for</span>(<span class="keywordtype">unsigned</span> j=0; j<wps.size(); ++j) {</div>
<div class="line"><a name="l00686"></a><span class="lineno"> 686</span>  <span class="keyword">const</span> <a class="code" href="classCVC3_1_1Clause.html" title="A class representing a CNF clause (a smart pointer)">Clause</a>& c = wps[j].first;</div>
<div class="line"><a name="l00687"></a><span class="lineno"> 687</span>  <span class="keywordtype">int</span> k = wps[j].second;</div>
<div class="line"><a name="l00688"></a><span class="lineno"> 688</span>  <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(c.<a class="code" href="classCVC3_1_1Clause.html#a4a2b1e46395f03fe87a6a5b7558292f0">watched</a>(k).<a class="code" href="classCVC3_1_1Literal.html#a4a2e0a421bfcb590c3a7964d2583a94c">getExpr</a>() == (!l).getExpr(),</div>
<div class="line"><a name="l00689"></a><span class="lineno"> 689</span>  <span class="stringliteral">"Bad watched literal:\n l = "</span>+l.<a class="code" href="classCVC3_1_1Literal.html#aff53e6b3e4da8c649816441046983a30">toString</a>()</div>
<div class="line"><a name="l00690"></a><span class="lineno"> 690</span>  +<span class="stringliteral">"\n c[k] = "</span>+c.<a class="code" href="classCVC3_1_1Clause.html#a4a2b1e46395f03fe87a6a5b7558292f0">watched</a>(k).<a class="code" href="classCVC3_1_1Literal.html#aff53e6b3e4da8c649816441046983a30">toString</a>());</div>
<div class="line"><a name="l00691"></a><span class="lineno"> 691</span>  <span class="keywordflow">if</span>(c.<a class="code" href="classCVC3_1_1Clause.html#a420281d9272ac052c75859be690bfd4d">deleted</a>()) { <span class="comment">// Remove the clause from the list</span></div>
<div class="line"><a name="l00692"></a><span class="lineno"> 692</span>  <span class="keywordflow">if</span>(wps.size() > 1) {</div>
<div class="line"><a name="l00693"></a><span class="lineno"> 693</span>  wps[j] = wps.back();</div>
<div class="line"><a name="l00694"></a><span class="lineno"> 694</span>  --j;</div>
<div class="line"><a name="l00695"></a><span class="lineno"> 695</span>  }</div>
<div class="line"><a name="l00696"></a><span class="lineno"> 696</span>  wps.pop_back();</div>
<div class="line"><a name="l00697"></a><span class="lineno"> 697</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(<span class="keyword">true</span> || !c.<a class="code" href="classCVC3_1_1Clause.html#a1e5660eadbc4e0c0ad18c6a9aae45d39" title="Check if the clause marked as SAT.">sat</a>()) {</div>
<div class="line"><a name="l00698"></a><span class="lineno"> 698</span>  <span class="comment">// Call BCP to update the watch pointer</span></div>
<div class="line"><a name="l00699"></a><span class="lineno"> 699</span>  <span class="keywordtype">bool</span> wpUpdated;</div>
<div class="line"><a name="l00700"></a><span class="lineno"> 700</span>  <span class="keywordtype">bool</span> conflict = !<a class="code" href="group__SE__Fast.html#gad7548d572241f215212176af0216cb94" title="Auxiliary function for unit propagation.">propagate</a>(c, k, wpUpdated);</div>
<div class="line"><a name="l00701"></a><span class="lineno"> 701</span>  <span class="comment">// Delete the old watch pointer from the list</span></div>
<div class="line"><a name="l00702"></a><span class="lineno"> 702</span>  <span class="keywordflow">if</span>(wpUpdated) {</div>
<div class="line"><a name="l00703"></a><span class="lineno"> 703</span>  <span class="keywordflow">if</span>(wps.size() > 1) {</div>
<div class="line"><a name="l00704"></a><span class="lineno"> 704</span>  wps[j] = wps.back();</div>
<div class="line"><a name="l00705"></a><span class="lineno"> 705</span>  --j;</div>
<div class="line"><a name="l00706"></a><span class="lineno"> 706</span>  }</div>
<div class="line"><a name="l00707"></a><span class="lineno"> 707</span>  wps.pop_back();</div>
<div class="line"><a name="l00708"></a><span class="lineno"> 708</span>  }</div>
<div class="line"><a name="l00709"></a><span class="lineno"> 709</span>  <span class="keywordflow">if</span> (conflict) {</div>
<div class="line"><a name="l00710"></a><span class="lineno"> 710</span>  <a class="code" href="group__SE__Fast.html#gafa7937cc0b7d14c0aafb1f9c20abf011" title="Clear the local fact queue.">clearFacts</a>();</div>
<div class="line"><a name="l00711"></a><span class="lineno"> 711</span>  <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(<a class="code" href="group__SE__Fast.html#ga4b05dccebac3de019dc112ab3dffc988" title="Queue of derived facts to be sent to DPs.">d_factQueue</a>.empty(), <span class="stringliteral">"bcp(): conflict"</span>);</div>
<div class="line"><a name="l00712"></a><span class="lineno"> 712</span>  <a class="code" href="debug_8h.html#ad64155edafde9f067f4868817cd04bdf">TRACE_MSG</a>(<span class="stringliteral">"search bcp"</span>, <span class="stringliteral">"bcp[conflict] => false }}"</span>);</div>
<div class="line"><a name="l00713"></a><span class="lineno"> 713</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00714"></a><span class="lineno"> 714</span>  }</div>
<div class="line"><a name="l00715"></a><span class="lineno"> 715</span>  }</div>
<div class="line"><a name="l00716"></a><span class="lineno"> 716</span>  }</div>
<div class="line"><a name="l00717"></a><span class="lineno"> 717</span> </div>
<div class="line"><a name="l00718"></a><span class="lineno"> 718</span>  vector<Circuit*>& cps = <a class="code" href="group__SE__Fast.html#ga84bfa366c43221ba288e0a1bd716efc6">d_circuitsByExpr</a>[l.<a class="code" href="classCVC3_1_1Literal.html#a4a2e0a421bfcb590c3a7964d2583a94c">getExpr</a>()];</div>
<div class="line"><a name="l00719"></a><span class="lineno"> 719</span>  <span class="keywordflow">for</span> (vector<Circuit*>::iterator it = cps.begin(), end = cps.end();</div>
<div class="line"><a name="l00720"></a><span class="lineno"> 720</span>  it < end; it++)</div>
<div class="line"><a name="l00721"></a><span class="lineno"> 721</span>  {</div>
<div class="line"><a name="l00722"></a><span class="lineno"> 722</span>  <span class="keywordflow">if</span> (!(*it)->propagate(<span class="keyword">this</span>)) {</div>
<div class="line"><a name="l00723"></a><span class="lineno"> 723</span>  <a class="code" href="group__SE__Fast.html#gafa7937cc0b7d14c0aafb1f9c20abf011" title="Clear the local fact queue.">clearFacts</a>();</div>
<div class="line"><a name="l00724"></a><span class="lineno"> 724</span>  <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(<a class="code" href="group__SE__Fast.html#ga4b05dccebac3de019dc112ab3dffc988" title="Queue of derived facts to be sent to DPs.">d_factQueue</a>.empty(), <span class="stringliteral">"bcp(): conflict-2"</span>);</div>
<div class="line"><a name="l00725"></a><span class="lineno"> 725</span>  <a class="code" href="debug_8h.html#ad64155edafde9f067f4868817cd04bdf">TRACE_MSG</a>(<span class="stringliteral">"search bcp"</span>, <span class="stringliteral">"bcp[circuit propagate] => false }}"</span>);</div>
<div class="line"><a name="l00726"></a><span class="lineno"> 726</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00727"></a><span class="lineno"> 727</span>  }</div>
<div class="line"><a name="l00728"></a><span class="lineno"> 728</span>  }</div>
<div class="line"><a name="l00729"></a><span class="lineno"> 729</span>  }</div>
<div class="line"><a name="l00730"></a><span class="lineno"> 730</span>  <span class="comment">// Finished with BCP* (without DPs).</span></div>
<div class="line"><a name="l00731"></a><span class="lineno"> 731</span>  <a class="code" href="group__SE__Fast.html#gadf72861b6482f6c585f3199d1436f7be" title="Clear the list of asserted literals (d_literals)">clearLiterals</a>();</div>
<div class="line"><a name="l00732"></a><span class="lineno"> 732</span>  <span class="comment">// Now, propagate the facts to DPs and repeat ((BCP*); DP) step</span></div>
<div class="line"><a name="l00733"></a><span class="lineno"> 733</span>  <span class="keywordflow">if</span>(!<a class="code" href="group__SE.html#ga3772c6af7eac91b9ed7fc278edf5ef90" title="Access to theory reasoning.">d_core</a>-><a class="code" href="classCVC3_1_1TheoryCore.html#a289340e4457a79f1101f37c3a07a49ed" title="Check if the current context is inconsistent.">inconsistent</a>()) <a class="code" href="group__SE__Fast.html#ga6d190905fefb2a36650306e5b577dd9a" title="Commit all the enqueued facts to the DPs.">commitFacts</a>();</div>
<div class="line"><a name="l00734"></a><span class="lineno"> 734</span>  }</div>
<div class="line"><a name="l00735"></a><span class="lineno"> 735</span>  <span class="keywordflow">if</span> (<a class="code" href="group__SE.html#ga3772c6af7eac91b9ed7fc278edf5ef90" title="Access to theory reasoning.">d_core</a>-><a class="code" href="classCVC3_1_1TheoryCore.html#a289340e4457a79f1101f37c3a07a49ed" title="Check if the current context is inconsistent.">inconsistent</a>()) {</div>
<div class="line"><a name="l00736"></a><span class="lineno"> 736</span>  <a class="code" href="group__SE__Fast.html#gae961b4fb4bb059a1d867447fc487aaee" title="Theorem(FALSE) which generated a conflict.">d_conflictTheorem</a> = <a class="code" href="group__SE.html#ga3772c6af7eac91b9ed7fc278edf5ef90" title="Access to theory reasoning.">d_core</a>-><a class="code" href="classCVC3_1_1TheoryCore.html#a5c7d2aa7db5db78829b8558d28560ddf" title="Get the proof of inconsistency for the current context.">inconsistentThm</a>();</div>
<div class="line"><a name="l00737"></a><span class="lineno"> 737</span>  <a class="code" href="group__SE__Fast.html#gafa7937cc0b7d14c0aafb1f9c20abf011" title="Clear the local fact queue.">clearFacts</a>();</div>
<div class="line"><a name="l00738"></a><span class="lineno"> 738</span>  <a class="code" href="debug_8h.html#ad64155edafde9f067f4868817cd04bdf">TRACE_MSG</a>(<span class="stringliteral">"search bcp"</span>, <span class="stringliteral">"bcp[DP conflict] => false }}"</span>);</div>
<div class="line"><a name="l00739"></a><span class="lineno"> 739</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00740"></a><span class="lineno"> 740</span>  }</div>
<div class="line"><a name="l00741"></a><span class="lineno"> 741</span>  <span class="keywordflow">else</span></div>
<div class="line"><a name="l00742"></a><span class="lineno"> 742</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"search basic"</span>, <span class="stringliteral">"Processed "</span>, <a class="code" href="group__SE__Fast.html#gaa6a69bd3df4bb72abd1e9b0fe868fc0d" title="Set of literals to be processed by bcp.">d_literals</a>.size(), <span class="stringliteral">" propagations"</span>);</div>
<div class="line"><a name="l00743"></a><span class="lineno"> 743</span>  <a class="code" href="debug_8h.html#a600cb2d68efe7cc413cccbb5714c7016">IF_DEBUG</a>(fullCheck();)</div>
<div class="line"><a name="l00744"></a><span class="lineno"> 744</span>  <a class="code" href="group__SE__Fast.html#gadf72861b6482f6c585f3199d1436f7be" title="Clear the list of asserted literals (d_literals)">clearLiterals</a>();</div>
<div class="line"><a name="l00745"></a><span class="lineno"> 745</span> </div>
<div class="line"><a name="l00746"></a><span class="lineno"> 746</span>  <span class="keywordtype">bool</span> dfs_heuristic = (<a class="code" href="group__SE.html#ga3772c6af7eac91b9ed7fc278edf5ef90" title="Access to theory reasoning.">d_core</a>-><a class="code" href="classCVC3_1_1TheoryCore.html#a46b2792a5c24f95ccfc3fbfc0456b09f">getFlags</a>()[<span class="stringliteral">"de"</span>].getString() == <span class="stringliteral">"dfs"</span>);</div>
<div class="line"><a name="l00747"></a><span class="lineno"> 747</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"search dfs"</span>, <span class="stringliteral">"DFS is "</span>, (dfs_heuristic? <span class="stringliteral">"on"</span> : <span class="stringliteral">"off"</span>),</div>
<div class="line"><a name="l00748"></a><span class="lineno"> 748</span>  <span class="stringliteral">" (de = "</span>+<a class="code" href="group__SE.html#ga3772c6af7eac91b9ed7fc278edf5ef90" title="Access to theory reasoning.">d_core</a>-><a class="code" href="classCVC3_1_1TheoryCore.html#a46b2792a5c24f95ccfc3fbfc0456b09f">getFlags</a>()[<span class="stringliteral">"de"</span>].getString()+<span class="stringliteral">") {"</span>);</div>
<div class="line"><a name="l00749"></a><span class="lineno"> 749</span>  <span class="comment">// When DFS heuristic is used, simplify the nonliterals only until</span></div>
<div class="line"><a name="l00750"></a><span class="lineno"> 750</span>  <span class="comment">// there is a completely simplified one on top of the stack, or</span></div>
<div class="line"><a name="l00751"></a><span class="lineno"> 751</span>  <span class="comment">// all of the non-literals are gone. Start from the end of the</span></div>
<div class="line"><a name="l00752"></a><span class="lineno"> 752</span>  <span class="comment">// list (top of the stack), since that's where the splitter is</span></div>
<div class="line"><a name="l00753"></a><span class="lineno"> 753</span>  <span class="comment">// most likely chosen. This way we are likely to hit something</span></div>
<div class="line"><a name="l00754"></a><span class="lineno"> 754</span>  <span class="comment">// that simplifies very soon.</span></div>
<div class="line"><a name="l00755"></a><span class="lineno"> 755</span> </div>
<div class="line"><a name="l00756"></a><span class="lineno"> 756</span>  <span class="keywordtype">size_t</span> origSize = <a class="code" href="group__SE__Fast.html#ga07c8e260b60d83042c97453892a15f38" title="Backtrackable list of non-literals (non-CNF formulas).">d_nonLiterals</a>.<a class="code" href="classCVC3_1_1CDList.html#adf92d0f391d73e7ac70da57db135af27">size</a>();</div>
<div class="line"><a name="l00757"></a><span class="lineno"> 757</span>  <span class="keywordtype">bool</span> done(<span class="keyword">false</span>);</div>
<div class="line"><a name="l00758"></a><span class="lineno"> 758</span>  <span class="keywordflow">for</span>(<span class="keywordtype">int</span> i=origSize-1; !done && !<a class="code" href="group__SE.html#ga3772c6af7eac91b9ed7fc278edf5ef90" title="Access to theory reasoning.">d_core</a>-><a class="code" href="classCVC3_1_1TheoryCore.html#a289340e4457a79f1101f37c3a07a49ed" title="Check if the current context is inconsistent.">inconsistent</a>() && i>=0; --i) {</div>
<div class="line"><a name="l00759"></a><span class="lineno"> 759</span>  <span class="keyword">const</span> <a class="code" href="classCVC3_1_1Theorem.html">Theorem</a>& thm = <a class="code" href="group__SE__Fast.html#ga07c8e260b60d83042c97453892a15f38" title="Backtrackable list of non-literals (non-CNF formulas).">d_nonLiterals</a>[i].get();</div>
<div class="line"><a name="l00760"></a><span class="lineno"> 760</span>  <span class="keyword">const</span> <a class="code" href="classCVC3_1_1Expr.html" title="Data structure of expressions in CVC3.">Expr</a>& e = thm.<a class="code" href="classCVC3_1_1Theorem.html#af2b97ae5d270ddf1013bf4f3867a7e5d">getExpr</a>();</div>
<div class="line"><a name="l00761"></a><span class="lineno"> 761</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"search dfs"</span>, <span class="stringliteral">"Simplifying non-literal"</span>, e, <span class="stringliteral">""</span>);</div>
<div class="line"><a name="l00762"></a><span class="lineno"> 762</span>  <span class="keywordflow">if</span> (e.<a class="code" href="group__ExprPkg.html#gadf8596df73fa69ff8e6a22b9321f5c34">isTrue</a>()) {</div>
<div class="line"><a name="l00763"></a><span class="lineno"> 763</span>  <span class="comment">// if (d_nonLiteralSimplified[thm.getExpr()]) {</span></div>
<div class="line"><a name="l00764"></a><span class="lineno"> 764</span>  <a class="code" href="debug_8h.html#a600cb2d68efe7cc413cccbb5714c7016">IF_DEBUG</a>(debugger.counter(<span class="stringliteral">"BCP: simplified non-literals: skipped [stale]"</span>)++;)</div>
<div class="line"><a name="l00765"></a><span class="lineno"> 765</span>  <a class="code" href="debug_8h.html#ad64155edafde9f067f4868817cd04bdf">TRACE_MSG</a>(<span class="stringliteral">"search bcp"</span>, <span class="stringliteral">"}[continue]// end of while(newInfo)"</span>);</div>
<div class="line"><a name="l00766"></a><span class="lineno"> 766</span>  <span class="keywordflow">continue</span>;</div>
<div class="line"><a name="l00767"></a><span class="lineno"> 767</span>  }</div>
<div class="line"><a name="l00768"></a><span class="lineno"> 768</span>  <a class="code" href="debug_8h.html#a600cb2d68efe7cc413cccbb5714c7016">IF_DEBUG</a>(debugger.counter(<span class="stringliteral">"BCP: simplified non-literals"</span>)++;)</div>
<div class="line"><a name="l00769"></a><span class="lineno"> 769</span>  <a class="code" href="classCVC3_1_1Theorem.html">Theorem</a> simpThm = <a class="code" href="group__SE.html#gaaa621df0c7e2a2043139e6451eab7072" title="Our version of simplifier: take Theorem(e), apply simplifier to get Theorem(e==e'), return Theorem(e')">simplify</a>(thm);</div>
<div class="line"><a name="l00770"></a><span class="lineno"> 770</span>  <a class="code" href="classCVC3_1_1Expr.html" title="Data structure of expressions in CVC3.">Expr</a> simp = simpThm.getExpr();</div>
<div class="line"><a name="l00771"></a><span class="lineno"> 771</span>  <span class="keywordflow">if</span>(simp != e) {</div>
<div class="line"><a name="l00772"></a><span class="lineno"> 772</span>  <a class="code" href="debug_8h.html#a600cb2d68efe7cc413cccbb5714c7016">IF_DEBUG</a>(debugger.counter(<span class="stringliteral">"BCP: simplified non-literals: changed"</span>)++;)</div>
<div class="line"><a name="l00773"></a><span class="lineno"> 773</span>  newInfo = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00774"></a><span class="lineno"> 774</span>  <span class="comment">// d_nonLiteralSimplified[thm.getExpr()] = true;</span></div>
<div class="line"><a name="l00775"></a><span class="lineno"> 775</span>  <span class="keywordflow">if</span> (!simp.<a class="code" href="group__ExprPkg.html#ga6173f64b22cba76472cd0c814bbf6dae">isFalse</a>()) {</div>
<div class="line"><a name="l00776"></a><span class="lineno"> 776</span>  <span class="keywordflow">while</span> (simp.<a class="code" href="group__ExprPkg.html#ga1c922163af59ed6bc101728d65e04d16">isExists</a>()) {</div>
<div class="line"><a name="l00777"></a><span class="lineno"> 777</span>  simpThm = <a class="code" href="group__SE.html#ga63f2a3cfcfa86820bea2f45cb890cc1c" title="Common proof rules.">d_commonRules</a>-><a class="code" href="classCVC3_1_1CommonProofRules.html#a015539886185195ba5d98c60cd7e8f66">skolemize</a>(simpThm);</div>
<div class="line"><a name="l00778"></a><span class="lineno"> 778</span>  simp = simpThm.getExpr();</div>
<div class="line"><a name="l00779"></a><span class="lineno"> 779</span>  }</div>
<div class="line"><a name="l00780"></a><span class="lineno"> 780</span>  <span class="keywordflow">if</span> (simp.<a class="code" href="group__ExprPkg.html#gaac535dae48f02fcd093a5b1b1a062211" title="Test if e is an abstract literal.">isAbsLiteral</a>()) {</div>
<div class="line"><a name="l00781"></a><span class="lineno"> 781</span>  <a class="code" href="group__SE__Fast.html#ga2c71aa94289db9ece678963617660640" title="Queue up a fact to assert to the DPs later.">enqueueFact</a>(simpThm);</div>
<div class="line"><a name="l00782"></a><span class="lineno"> 782</span>  <a class="code" href="group__SE__Fast.html#ga6d190905fefb2a36650306e5b577dd9a" title="Commit all the enqueued facts to the DPs.">commitFacts</a>();</div>
<div class="line"><a name="l00783"></a><span class="lineno"> 783</span>  }</div>
<div class="line"><a name="l00784"></a><span class="lineno"> 784</span>  <a class="code" href="group__SE__Fast.html#ga07c8e260b60d83042c97453892a15f38" title="Backtrackable list of non-literals (non-CNF formulas).">d_nonLiterals</a>[i] = simpThm;</div>
<div class="line"><a name="l00785"></a><span class="lineno"> 785</span>  <span class="keywordflow">if</span>(dfs_heuristic) {</div>
<div class="line"><a name="l00786"></a><span class="lineno"> 786</span>  <span class="comment">// Something has changed, time to stop this loop. If we</span></div>
<div class="line"><a name="l00787"></a><span class="lineno"> 787</span>  <span class="comment">// also get a new non-literal on top of the stack, and no</span></div>
<div class="line"><a name="l00788"></a><span class="lineno"> 788</span>  <span class="comment">// new literals, then stop the entire BCP (since that</span></div>
<div class="line"><a name="l00789"></a><span class="lineno"> 789</span>  <span class="comment">// non-literal is guaranteed to be fully simplified).</span></div>
<div class="line"><a name="l00790"></a><span class="lineno"> 790</span>  done = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00791"></a><span class="lineno"> 791</span>  <span class="keywordflow">if</span>(<a class="code" href="group__SE__Fast.html#ga07c8e260b60d83042c97453892a15f38" title="Backtrackable list of non-literals (non-CNF formulas).">d_nonLiterals</a>.<a class="code" href="classCVC3_1_1CDList.html#adf92d0f391d73e7ac70da57db135af27">size</a>() > origSize && <a class="code" href="group__SE__Fast.html#gaa6a69bd3df4bb72abd1e9b0fe868fc0d" title="Set of literals to be processed by bcp.">d_literals</a>.empty())</div>
<div class="line"><a name="l00792"></a><span class="lineno"> 792</span>  newInfo = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00793"></a><span class="lineno"> 793</span>  }</div>
<div class="line"><a name="l00794"></a><span class="lineno"> 794</span>  } <span class="keywordflow">else</span></div>
<div class="line"><a name="l00795"></a><span class="lineno"> 795</span>  <a class="code" href="group__SE__Fast.html#ga33ff53b3eeb9811b1510fffd3cdcf234" title="Set the context inconsistent. Takes Theorem(FALSE).">setInconsistent</a>(simpThm);</div>
<div class="line"><a name="l00796"></a><span class="lineno"> 796</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (dfs_heuristic) done = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00797"></a><span class="lineno"> 797</span>  }</div>
<div class="line"><a name="l00798"></a><span class="lineno"> 798</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"search dfs"</span>, <span class="stringliteral">"End of non-literal simplification: newInfo = "</span>,</div>
<div class="line"><a name="l00799"></a><span class="lineno"> 799</span>  (newInfo? <span class="stringliteral">"true"</span> : <span class="stringliteral">"false"</span>), <span class="stringliteral">" }}"</span>);</div>
<div class="line"><a name="l00800"></a><span class="lineno"> 800</span>  <span class="keywordflow">if</span> (<a class="code" href="group__SE.html#ga3772c6af7eac91b9ed7fc278edf5ef90" title="Access to theory reasoning.">d_core</a>-><a class="code" href="classCVC3_1_1TheoryCore.html#a289340e4457a79f1101f37c3a07a49ed" title="Check if the current context is inconsistent.">inconsistent</a>()) {</div>
<div class="line"><a name="l00801"></a><span class="lineno"> 801</span>  <a class="code" href="group__SE__Fast.html#gae961b4fb4bb059a1d867447fc487aaee" title="Theorem(FALSE) which generated a conflict.">d_conflictTheorem</a> = <a class="code" href="group__SE.html#ga3772c6af7eac91b9ed7fc278edf5ef90" title="Access to theory reasoning.">d_core</a>-><a class="code" href="classCVC3_1_1TheoryCore.html#a5c7d2aa7db5db78829b8558d28560ddf" title="Get the proof of inconsistency for the current context.">inconsistentThm</a>();</div>
<div class="line"><a name="l00802"></a><span class="lineno"> 802</span>  <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(<a class="code" href="group__SE__Fast.html#ga4b05dccebac3de019dc112ab3dffc988" title="Queue of derived facts to be sent to DPs.">d_factQueue</a>.empty(), <span class="stringliteral">"bcp(): inconsistent (nonLits)"</span>);</div>
<div class="line"><a name="l00803"></a><span class="lineno"> 803</span>  <a class="code" href="debug_8h.html#ad64155edafde9f067f4868817cd04bdf">TRACE_MSG</a>(<span class="stringliteral">"search bcp"</span>, <span class="stringliteral">"bcp[nonCNF conflict] => false }}"</span>);</div>
<div class="line"><a name="l00804"></a><span class="lineno"> 804</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00805"></a><span class="lineno"> 805</span>  }</div>
<div class="line"><a name="l00806"></a><span class="lineno"> 806</span>  <a class="code" href="debug_8h.html#ad64155edafde9f067f4868817cd04bdf">TRACE_MSG</a>(<span class="stringliteral">"search bcp"</span>, <span class="stringliteral">"}// end of while(newInfo)"</span>);</div>
<div class="line"><a name="l00807"></a><span class="lineno"> 807</span>  }</div>
<div class="line"><a name="l00808"></a><span class="lineno"> 808</span>  <a class="code" href="debug_8h.html#a600cb2d68efe7cc413cccbb5714c7016">IF_DEBUG</a>(fullCheck();)</div>
<div class="line"><a name="l00809"></a><span class="lineno"> 809</span>  <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(<a class="code" href="group__SE__Fast.html#ga4b05dccebac3de019dc112ab3dffc988" title="Queue of derived facts to be sent to DPs.">d_factQueue</a>.empty(), <span class="stringliteral">"bcp(): end"</span>);</div>
<div class="line"><a name="l00810"></a><span class="lineno"> 810</span>  <a class="code" href="debug_8h.html#ad64155edafde9f067f4868817cd04bdf">TRACE_MSG</a>(<span class="stringliteral">"search bcp"</span>, <span class="stringliteral">"bcp => true }"</span>);</div>
<div class="line"><a name="l00811"></a><span class="lineno"> 811</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a name="l00812"></a><span class="lineno"> 812</span> }</div>
<div class="line"><a name="l00813"></a><span class="lineno"> 813</span> </div>
<div class="line"><a name="l00814"></a><span class="lineno"> 814</span> </div>
<div class="line"><a name="l00815"></a><span class="lineno"> 815</span> <span class="comment">// True if successfully propagated. False if conflict.</span></div>
<div class="line"><a name="l00816"></a><span class="lineno"><a class="code" href="group__SE__Fast.html#gad7548d572241f215212176af0216cb94"> 816</a></span> <span class="keywordtype">bool</span> <a class="code" href="group__SE__Fast.html#gad7548d572241f215212176af0216cb94" title="Auxiliary function for unit propagation.">SearchEngineFast::propagate</a>(<span class="keyword">const</span> <a class="code" href="classCVC3_1_1Clause.html" title="A class representing a CNF clause (a smart pointer)">Clause</a> &c, <span class="keywordtype">int</span> idx, <span class="keywordtype">bool</span>& wpUpdated)</div>
<div class="line"><a name="l00817"></a><span class="lineno"> 817</span> {</div>
<div class="line"><a name="l00818"></a><span class="lineno"> 818</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"search propagate"</span>, <span class="stringliteral">"propagate("</span>, <a class="code" href="classCVC3_1_1CompactClause.html">CompactClause</a>(c),</div>
<div class="line"><a name="l00819"></a><span class="lineno"> 819</span>  <span class="stringliteral">", idx = "</span>+<a class="code" href="namespaceCVC3.html#af69618103f1f0f2eadada0796a2a940c">int2string</a>(idx)+<span class="stringliteral">") {"</span>);</div>
<div class="line"><a name="l00820"></a><span class="lineno"> 820</span>  <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(idx==0 || idx==1, <span class="stringliteral">"propagate(): bad index = "</span>+<a class="code" href="namespaceCVC3.html#af69618103f1f0f2eadada0796a2a940c">int2string</a>(idx));</div>
<div class="line"><a name="l00821"></a><span class="lineno"> 821</span>  <span class="comment">// The current watched literal must be set to FALSE, unless the</span></div>
<div class="line"><a name="l00822"></a><span class="lineno"> 822</span>  <span class="comment">// clause is of size 1</span></div>
<div class="line"><a name="l00823"></a><span class="lineno"> 823</span>  <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>((c.<a class="code" href="classCVC3_1_1Clause.html#a7cfde40c65fc8eb4f733094fad07dfa1">size</a>() == 1) || c.<a class="code" href="classCVC3_1_1Clause.html#a4a2b1e46395f03fe87a6a5b7558292f0">watched</a>(idx).<a class="code" href="classCVC3_1_1Literal.html#a48feb6e7cf83b3a59b94ca0e75627d0f">getValue</a>() < 0,</div>
<div class="line"><a name="l00824"></a><span class="lineno"> 824</span>  <span class="stringliteral">"propagate(): this literal must be FALSE: c.watched("</span></div>
<div class="line"><a name="l00825"></a><span class="lineno"> 825</span>  +<a class="code" href="namespaceCVC3.html#af69618103f1f0f2eadada0796a2a940c">int2string</a>(idx)+<span class="stringliteral">")\n c = "</span>+c.<a class="code" href="classCVC3_1_1Clause.html#a97eeb3430667cd3c05a3c977d7285102">toString</a>());</div>
<div class="line"><a name="l00826"></a><span class="lineno"> 826</span>  wpUpdated = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00827"></a><span class="lineno"> 827</span>  <span class="keywordtype">int</span> lit = c.<a class="code" href="classCVC3_1_1Clause.html#ad399ff73eb62edf9cc4d1135e91afdcb">wp</a>(idx), otherLit = c.<a class="code" href="classCVC3_1_1Clause.html#ad399ff73eb62edf9cc4d1135e91afdcb">wp</a>(1-idx);</div>
<div class="line"><a name="l00828"></a><span class="lineno"> 828</span>  <span class="keywordtype">int</span> dir = c.<a class="code" href="classCVC3_1_1Clause.html#a4c9a2e81c05572893ba1a3b09526d172">dir</a>(idx);</div>
<div class="line"><a name="l00829"></a><span class="lineno"> 829</span>  <span class="keywordtype">int</span> size = c.<a class="code" href="classCVC3_1_1Clause.html#a7cfde40c65fc8eb4f733094fad07dfa1">size</a>();</div>
<div class="line"><a name="l00830"></a><span class="lineno"> 830</span>  <span class="keywordflow">while</span>(<span class="keyword">true</span>) {</div>
<div class="line"><a name="l00831"></a><span class="lineno"> 831</span>  <a class="code" href="debug_8h.html#ad64155edafde9f067f4868817cd04bdf">TRACE_MSG</a>(<span class="stringliteral">"search propagate"</span>, <span class="stringliteral">"propagate: lit="</span>+<a class="code" href="namespaceCVC3.html#af69618103f1f0f2eadada0796a2a940c">int2string</a>(lit)</div>
<div class="line"><a name="l00832"></a><span class="lineno"> 832</span>  +<span class="stringliteral">", otherLit="</span>+<a class="code" href="namespaceCVC3.html#af69618103f1f0f2eadada0796a2a940c">int2string</a>(otherLit)+<span class="stringliteral">", dir="</span>+<a class="code" href="namespaceCVC3.html#af69618103f1f0f2eadada0796a2a940c">int2string</a>(dir));</div>
<div class="line"><a name="l00833"></a><span class="lineno"> 833</span>  lit += dir;</div>
<div class="line"><a name="l00834"></a><span class="lineno"> 834</span>  <span class="keywordflow">if</span>(lit < 0 || lit >= size) { <span class="comment">// hit the edge</span></div>
<div class="line"><a name="l00835"></a><span class="lineno"> 835</span>  <span class="keywordflow">if</span>(dir == c.<a class="code" href="classCVC3_1_1Clause.html#a4c9a2e81c05572893ba1a3b09526d172">dir</a>(idx)) {</div>
<div class="line"><a name="l00836"></a><span class="lineno"> 836</span>  <span class="comment">// Finished first half of the clause, do the other half</span></div>
<div class="line"><a name="l00837"></a><span class="lineno"> 837</span>  lit = c.<a class="code" href="classCVC3_1_1Clause.html#ad399ff73eb62edf9cc4d1135e91afdcb">wp</a>(idx);</div>
<div class="line"><a name="l00838"></a><span class="lineno"> 838</span>  dir = -dir;</div>
<div class="line"><a name="l00839"></a><span class="lineno"> 839</span>  <span class="keywordflow">continue</span>;</div>
<div class="line"><a name="l00840"></a><span class="lineno"> 840</span>  }</div>
<div class="line"><a name="l00841"></a><span class="lineno"> 841</span>  <span class="comment">// All literals are false, except for the other watched literal.</span></div>
<div class="line"><a name="l00842"></a><span class="lineno"> 842</span>  <span class="comment">// Check its value.</span></div>
<div class="line"><a name="l00843"></a><span class="lineno"> 843</span>  <a class="code" href="classCVC3_1_1Literal.html">Literal</a> l(c[otherLit]);</div>
<div class="line"><a name="l00844"></a><span class="lineno"> 844</span>  <span class="keywordflow">if</span>(l.<a class="code" href="classCVC3_1_1Literal.html#a48feb6e7cf83b3a59b94ca0e75627d0f">getValue</a>() < 0) { <span class="comment">// a conflict</span></div>
<div class="line"><a name="l00845"></a><span class="lineno"> 845</span>  <span class="comment">//Literal ff(newLiteral(d_vcl->getEM()->falseExpr()));</span></div>
<div class="line"><a name="l00846"></a><span class="lineno"> 846</span>  <span class="comment">//ff.setValue(1, c, -1);</span></div>
<div class="line"><a name="l00847"></a><span class="lineno"> 847</span>  <span class="comment">//d_lastBCPConflict = ff;</span></div>
<div class="line"><a name="l00848"></a><span class="lineno"> 848</span>  vector<Theorem> thms;</div>
<div class="line"><a name="l00849"></a><span class="lineno"> 849</span>  <span class="keywordflow">for</span> (<span class="keywordtype">unsigned</span> i = 0; i < c.<a class="code" href="classCVC3_1_1Clause.html#a7cfde40c65fc8eb4f733094fad07dfa1">size</a>(); ++i)</div>
<div class="line"><a name="l00850"></a><span class="lineno"> 850</span>  thms.push_back(c[i].<a class="code" href="classCVC3_1_1Clause.html#aa933cec7528780d7971be0c10b76dc02">getTheorem</a>());</div>
<div class="line"><a name="l00851"></a><span class="lineno"> 851</span>  <a class="code" href="group__SE__Fast.html#gae961b4fb4bb059a1d867447fc487aaee" title="Theorem(FALSE) which generated a conflict.">d_conflictTheorem</a> = <a class="code" href="group__SE.html#ga879b68112123e2b4ae7175d85a03bfec" title="Proof rules for the search engine.">d_rules</a>-><a class="code" href="group__SE__Rules.html#ga9c74425b4471d411f58f16781951c441" title=""Conflict" rule (all literals in a clause become FALSE) ">conflictRule</a>(thms,c.<a class="code" href="classCVC3_1_1Clause.html#aa933cec7528780d7971be0c10b76dc02">getTheorem</a>());</div>
<div class="line"><a name="l00852"></a><span class="lineno"> 852</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"search propagate"</span>, <span class="stringliteral">"propagate["</span>, <a class="code" href="classCVC3_1_1CompactClause.html">CompactClause</a>(c),</div>
<div class="line"><a name="l00853"></a><span class="lineno"> 853</span>  <span class="stringliteral">"] => false }"</span>);</div>
<div class="line"><a name="l00854"></a><span class="lineno"> 854</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00855"></a><span class="lineno"> 855</span>  }</div>
<div class="line"><a name="l00856"></a><span class="lineno"> 856</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span>(l.<a class="code" href="classCVC3_1_1Literal.html#a48feb6e7cf83b3a59b94ca0e75627d0f">getValue</a>() == 0) {</div>
<div class="line"><a name="l00857"></a><span class="lineno"> 857</span>  <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(c.<a class="code" href="classCVC3_1_1Clause.html#a7cfde40c65fc8eb4f733094fad07dfa1">size</a>() > 1 && l.<a class="code" href="classCVC3_1_1Literal.html#a4a2e0a421bfcb590c3a7964d2583a94c">getExpr</a>().<a class="code" href="group__ExprPkg.html#gaac535dae48f02fcd093a5b1b1a062211" title="Test if e is an abstract literal.">isAbsLiteral</a>(), <span class="stringliteral">"BCP: Expr should be literal"</span>);</div>
<div class="line"><a name="l00858"></a><span class="lineno"> 858</span>  <a class="code" href="group__SE__Fast.html#ga29e749a0ca7cbe86118a0d72e02e0696" title="Total number of unit propagations.">d_unitPropCount</a>++;</div>
<div class="line"><a name="l00859"></a><span class="lineno"> 859</span>  c.<a class="code" href="classCVC3_1_1Clause.html#ae266a9c156142d2f9f53ec741d7304df">markSat</a>();</div>
<div class="line"><a name="l00860"></a><span class="lineno"> 860</span>  <span class="comment">// Let's prove the new literal instead of playing assumption games</span></div>
<div class="line"><a name="l00861"></a><span class="lineno"> 861</span>  <a class="code" href="group__SE__Fast.html#ga88d524fb175ae8156696cc73cb182ffd" title="Do the unit propagation for the clause.">unitPropagation</a>(c,otherLit);</div>
<div class="line"><a name="l00862"></a><span class="lineno"> 862</span>  <span class="comment">//l.setValue(1, c, otherLit);</span></div>
<div class="line"><a name="l00863"></a><span class="lineno"> 863</span>  <span class="comment">//d_core->addFact(createAssumption(l));</span></div>
<div class="line"><a name="l00864"></a><span class="lineno"> 864</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"search propagate"</span>, <span class="stringliteral">"propagate["</span>, <a class="code" href="classCVC3_1_1CompactClause.html">CompactClause</a>(c),</div>
<div class="line"><a name="l00865"></a><span class="lineno"> 865</span>  <span class="stringliteral">"] => true }"</span>);</div>
<div class="line"><a name="l00866"></a><span class="lineno"> 866</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a name="l00867"></a><span class="lineno"> 867</span>  }</div>
<div class="line"><a name="l00868"></a><span class="lineno"> 868</span>  <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00869"></a><span class="lineno"> 869</span>  c.<a class="code" href="classCVC3_1_1Clause.html#ae266a9c156142d2f9f53ec741d7304df">markSat</a>();</div>
<div class="line"><a name="l00870"></a><span class="lineno"> 870</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"search propagate"</span>, <span class="stringliteral">"propagate["</span>, <a class="code" href="classCVC3_1_1CompactClause.html">CompactClause</a>(c),</div>
<div class="line"><a name="l00871"></a><span class="lineno"> 871</span>  <span class="stringliteral">"] => true }"</span>);</div>
<div class="line"><a name="l00872"></a><span class="lineno"> 872</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a name="l00873"></a><span class="lineno"> 873</span>  }</div>
<div class="line"><a name="l00874"></a><span class="lineno"> 874</span>  }</div>
<div class="line"><a name="l00875"></a><span class="lineno"> 875</span>  <span class="comment">// If it's the other watched literal, skip it</span></div>
<div class="line"><a name="l00876"></a><span class="lineno"> 876</span>  <span class="keywordflow">if</span>(lit == otherLit) <span class="keywordflow">continue</span>;</div>
<div class="line"><a name="l00877"></a><span class="lineno"> 877</span> </div>
<div class="line"><a name="l00878"></a><span class="lineno"> 878</span>  <a class="code" href="classCVC3_1_1Literal.html">Literal</a> l(c[lit]);</div>
<div class="line"><a name="l00879"></a><span class="lineno"> 879</span>  <span class="keywordtype">int</span> val(l.<a class="code" href="classCVC3_1_1Literal.html#a48feb6e7cf83b3a59b94ca0e75627d0f">getValue</a>());</div>
<div class="line"><a name="l00880"></a><span class="lineno"> 880</span>  <span class="comment">// if it is false, keep looking</span></div>
<div class="line"><a name="l00881"></a><span class="lineno"> 881</span>  <span class="keywordflow">if</span>(val < 0) <span class="keywordflow">continue</span>;</div>
<div class="line"><a name="l00882"></a><span class="lineno"> 882</span>  <span class="comment">// OPTIMIZATION: if lit is TRUE, mark the clause SAT and give up.</span></div>
<div class="line"><a name="l00883"></a><span class="lineno"> 883</span>  <span class="comment">// FIXME: this is different from Chaff. Make sure it doesn't harm</span></div>
<div class="line"><a name="l00884"></a><span class="lineno"> 884</span>  <span class="comment">// the performance.</span></div>
<div class="line"><a name="l00885"></a><span class="lineno"> 885</span>  <span class="keywordflow">if</span>(val > 0) {</div>
<div class="line"><a name="l00886"></a><span class="lineno"> 886</span>  c.<a class="code" href="classCVC3_1_1Clause.html#ae266a9c156142d2f9f53ec741d7304df">markSat</a>();</div>
<div class="line"><a name="l00887"></a><span class="lineno"> 887</span> <span class="comment">// return true;</span></div>
<div class="line"><a name="l00888"></a><span class="lineno"> 888</span>  }</div>
<div class="line"><a name="l00889"></a><span class="lineno"> 889</span> </div>
<div class="line"><a name="l00890"></a><span class="lineno"> 890</span>  <span class="comment">// Now the value of 'lit' is unknown. Set the watch pointer to</span></div>
<div class="line"><a name="l00891"></a><span class="lineno"> 891</span>  <span class="comment">// this literal, if it is indeed a literal (it may be any formula</span></div>
<div class="line"><a name="l00892"></a><span class="lineno"> 892</span>  <span class="comment">// in a pseudo-clause), and update the direction.</span></div>
<div class="line"><a name="l00893"></a><span class="lineno"> 893</span>  c.<a class="code" href="classCVC3_1_1Clause.html#ad399ff73eb62edf9cc4d1135e91afdcb">wp</a>(idx, lit);</div>
<div class="line"><a name="l00894"></a><span class="lineno"> 894</span>  c.<a class="code" href="classCVC3_1_1Clause.html#a4c9a2e81c05572893ba1a3b09526d172">dir</a>(idx, dir);</div>
<div class="line"><a name="l00895"></a><span class="lineno"> 895</span>  <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(c.<a class="code" href="classCVC3_1_1Clause.html#a4a2b1e46395f03fe87a6a5b7558292f0">watched</a>(idx).<a class="code" href="classCVC3_1_1Literal.html#a48feb6e7cf83b3a59b94ca0e75627d0f">getValue</a>() >= 0,</div>
<div class="line"><a name="l00896"></a><span class="lineno"> 896</span>  <span class="stringliteral">"Bad watched literals in clause:\n"</span></div>
<div class="line"><a name="l00897"></a><span class="lineno"> 897</span>  +<a class="code" href="classCVC3_1_1CompactClause.html">CompactClause</a>(c).<a class="code" href="classCVC3_1_1CompactClause.html#abb55c9dc63b8ac52030738cbacea0141">toString</a>());</div>
<div class="line"><a name="l00898"></a><span class="lineno"> 898</span>  <span class="comment">// Get the expression of the literal's inverse</span></div>
<div class="line"><a name="l00899"></a><span class="lineno"> 899</span>  <a class="code" href="classCVC3_1_1Literal.html">Literal</a> inv(!c[lit]);</div>
<div class="line"><a name="l00900"></a><span class="lineno"> 900</span>  <span class="comment">// If it is indeed a literal, update the watch pointers</span></div>
<div class="line"><a name="l00901"></a><span class="lineno"> 901</span>  <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(inv.getExpr().isAbsLiteral(), <span class="stringliteral">"Expr should be literal: inv = "</span></div>
<div class="line"><a name="l00902"></a><span class="lineno"> 902</span>  +inv.getExpr().toString());</div>
<div class="line"><a name="l00903"></a><span class="lineno"> 903</span>  <span class="comment">// Add the new watched literal to the watch pointer list</span></div>
<div class="line"><a name="l00904"></a><span class="lineno"> 904</span>  pair<Clause, int> p(c, idx);</div>
<div class="line"><a name="l00905"></a><span class="lineno"> 905</span>  <a class="code" href="group__SE__Fast.html#ga8f4353c8f8c65ed00806861471bd857f" title="Return a ref to the vector of watched literals. If no such vector exists, create it.">wp</a>(inv).push_back(p);</div>
<div class="line"><a name="l00906"></a><span class="lineno"> 906</span> </div>
<div class="line"><a name="l00907"></a><span class="lineno"> 907</span>  <span class="comment">// Signal to remove the old watch pointer</span></div>
<div class="line"><a name="l00908"></a><span class="lineno"> 908</span>  wpUpdated = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00909"></a><span class="lineno"> 909</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"search propagate"</span>, <span class="stringliteral">"propagate["</span>, <a class="code" href="classCVC3_1_1CompactClause.html">CompactClause</a>(c),</div>
<div class="line"><a name="l00910"></a><span class="lineno"> 910</span>  <span class="stringliteral">"] => true }"</span>);</div>
<div class="line"><a name="l00911"></a><span class="lineno"> 911</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a name="l00912"></a><span class="lineno"> 912</span>  }</div>
<div class="line"><a name="l00913"></a><span class="lineno"> 913</span> }</div>
<div class="line"><a name="l00914"></a><span class="lineno"> 914</span> </div>
<div class="line"><a name="l00915"></a><span class="lineno"><a class="code" href="group__SE__Fast.html#ga88d524fb175ae8156696cc73cb182ffd"> 915</a></span> <span class="keywordtype">void</span> <a class="code" href="group__SE__Fast.html#ga88d524fb175ae8156696cc73cb182ffd" title="Do the unit propagation for the clause.">SearchEngineFast::unitPropagation</a>(<span class="keyword">const</span> <a class="code" href="classCVC3_1_1Clause.html" title="A class representing a CNF clause (a smart pointer)">Clause</a> &c, <span class="keywordtype">unsigned</span> idx)</div>
<div class="line"><a name="l00916"></a><span class="lineno"> 916</span> { </div>
<div class="line"><a name="l00917"></a><span class="lineno"> 917</span>  vector<Theorem> thms;</div>
<div class="line"><a name="l00918"></a><span class="lineno"> 918</span>  <span class="keywordflow">for</span> (<span class="keywordtype">unsigned</span> i = 0; i < c.<a class="code" href="classCVC3_1_1Clause.html#a7cfde40c65fc8eb4f733094fad07dfa1">size</a>(); ++i)</div>
<div class="line"><a name="l00919"></a><span class="lineno"> 919</span>  <span class="keywordflow">if</span> (i != idx) {</div>
<div class="line"><a name="l00920"></a><span class="lineno"> 920</span>  thms.push_back(c[i].getTheorem());</div>
<div class="line"><a name="l00921"></a><span class="lineno"> 921</span>  <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(!thms.back().isNull(),</div>
<div class="line"><a name="l00922"></a><span class="lineno"> 922</span>  <span class="stringliteral">"unitPropagation(idx = "</span>+<a class="code" href="namespaceCVC3.html#af69618103f1f0f2eadada0796a2a940c">int2string</a>(idx)+<span class="stringliteral">", i = "</span></div>
<div class="line"><a name="l00923"></a><span class="lineno"> 923</span>  +<a class="code" href="namespaceCVC3.html#af69618103f1f0f2eadada0796a2a940c">int2string</a>(i)+<span class="stringliteral">",\n"</span>+c.<a class="code" href="classCVC3_1_1Clause.html#a97eeb3430667cd3c05a3c977d7285102">toString</a>()+<span class="stringliteral">")"</span>);</div>
<div class="line"><a name="l00924"></a><span class="lineno"> 924</span>  }</div>
<div class="line"><a name="l00925"></a><span class="lineno"> 925</span>  <a class="code" href="classCVC3_1_1Theorem.html">Theorem</a> thm(<a class="code" href="group__SE.html#ga879b68112123e2b4ae7175d85a03bfec" title="Proof rules for the search engine.">d_rules</a>-><a class="code" href="group__SE__Rules.html#gae7221bb8b77313a9b53a4beca9cc0aa0" title="Unit propagation rule: .">unitProp</a>(thms,c.<a class="code" href="classCVC3_1_1Clause.html#aa933cec7528780d7971be0c10b76dc02">getTheorem</a>(),idx));</div>
<div class="line"><a name="l00926"></a><span class="lineno"> 926</span>  <a class="code" href="group__SE__Fast.html#ga2c71aa94289db9ece678963617660640" title="Queue up a fact to assert to the DPs later.">enqueueFact</a>(thm); <span class="comment">// d_core->addFact(thm);</span></div>
<div class="line"><a name="l00927"></a><span class="lineno"> 927</span>  <span class="comment">// recordFact(thm);</span></div>
<div class="line"><a name="l00928"></a><span class="lineno"> 928</span> </div>
<div class="line"><a name="l00929"></a><span class="lineno"> 929</span>  <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(thm.<a class="code" href="classCVC3_1_1Theorem.html#aed1590a02166f6099e5538dbf681a60c" title="Check if the theorem is a literal.">isAbsLiteral</a>(),</div>
<div class="line"><a name="l00930"></a><span class="lineno"> 930</span>  <span class="stringliteral">"unitPropagation(): pushing non-literal to d_literals:\n "</span></div>
<div class="line"><a name="l00931"></a><span class="lineno"> 931</span>  +thm.<a class="code" href="classCVC3_1_1Theorem.html#af2b97ae5d270ddf1013bf4f3867a7e5d">getExpr</a>().<a class="code" href="group__ExprPkg.html#gaf3028bb1619f8cc69b66ec712e1adb54" title="Print the expression to a string.">toString</a>());</div>
<div class="line"><a name="l00932"></a><span class="lineno"> 932</span>  <a class="code" href="classCVC3_1_1Literal.html">Literal</a> l(<a class="code" href="group__SE.html#gaf0dbbb1806723760ab8744e96a8c6657" title="Construct a Literal out of an Expr or return an existing one.">newLiteral</a>(thm.<a class="code" href="classCVC3_1_1Theorem.html#af2b97ae5d270ddf1013bf4f3867a7e5d">getExpr</a>()));</div>
<div class="line"><a name="l00933"></a><span class="lineno"> 933</span>  <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(l.getValue() == 1, <span class="stringliteral">"unitPropagation: bad literal: "</span></div>
<div class="line"><a name="l00934"></a><span class="lineno"> 934</span>  +l.toString());</div>
<div class="line"><a name="l00935"></a><span class="lineno"> 935</span>  <a class="code" href="group__SE__Fast.html#gaa6a69bd3df4bb72abd1e9b0fe868fc0d" title="Set of literals to be processed by bcp.">d_literals</a>.push_back(l);</div>
<div class="line"><a name="l00936"></a><span class="lineno"> 936</span> }</div>
<div class="line"><a name="l00937"></a><span class="lineno"> 937</span> </div>
<div class="line"><a name="l00938"></a><span class="lineno"> 938</span> </div>
<div class="line"><a name="l00939"></a><span class="lineno"><a class="code" href="group__SE__Fast.html#ga4490cc372993398612e7556e14222ff3"> 939</a></span> <span class="keywordtype">bool</span> <a class="code" href="group__SE__Fast.html#ga4490cc372993398612e7556e14222ff3" title="Determines backtracking level and adds conflict clauses.">SearchEngineFast::fixConflict</a>()</div>
<div class="line"><a name="l00940"></a><span class="lineno"> 940</span> {</div>
<div class="line"><a name="l00941"></a><span class="lineno"> 941</span>  <a class="code" href="debug_8h.html#ad64155edafde9f067f4868817cd04bdf">TRACE_MSG</a>(<span class="stringliteral">"search basic"</span>, <span class="stringliteral">"FixConflict"</span>);</div>
<div class="line"><a name="l00942"></a><span class="lineno"> 942</span>  <a class="code" href="classCVC3_1_1Theorem.html">Theorem</a> res, conf;</div>
<div class="line"><a name="l00943"></a><span class="lineno"> 943</span>  <a class="code" href="group__SE__Fast.html#gaecd7cc2115fe235653a62acf93ccb1e5" title="Total number of conflicts.">d_conflictCount</a>++;</div>
<div class="line"><a name="l00944"></a><span class="lineno"> 944</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"conflicts"</span>, <span class="stringliteral">"found conflict # "</span>, <a class="code" href="group__SE__Fast.html#gaecd7cc2115fe235653a62acf93ccb1e5" title="Total number of conflicts.">d_conflictCount</a>, <span class="stringliteral">""</span>);</div>
<div class="line"><a name="l00945"></a><span class="lineno"> 945</span>  <a class="code" href="debug_8h.html#a600cb2d68efe7cc413cccbb5714c7016">IF_DEBUG</a>(<span class="keywordflow">if</span>(debugger.trace(<span class="stringliteral">"impl graph verbose"</span>)) {</div>
<div class="line"><a name="l00946"></a><span class="lineno"> 946</span>  <a class="code" href="group__SE__Fast.html#gae961b4fb4bb059a1d867447fc487aaee" title="Theorem(FALSE) which generated a conflict.">d_conflictTheorem</a>.<a class="code" href="classCVC3_1_1Theorem.html#ad9da69b34ab2bab4192e5977e5c10498">printDebug</a>();</div>
<div class="line"><a name="l00947"></a><span class="lineno"> 947</span>  })</div>
<div class="line"><a name="l00948"></a><span class="lineno"> 948</span> </div>
<div class="line"><a name="l00949"></a><span class="lineno"> 949</span>  <span class="keywordflow">if</span> (<a class="code" href="group__SE.html#gab267d9f29c30c8e26b5c7bcc4d15306a" title="Return the current scope level (for convenience)">scopeLevel</a>() == <a class="code" href="group__SE.html#ga640e08e2b051e08f2abdd4111b9a2e71" title="The bottom-most scope for the current call to checkSAT (where conflict clauses are still valid)...">d_bottomScope</a>)</div>
<div class="line"><a name="l00950"></a><span class="lineno"> 950</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00951"></a><span class="lineno"> 951</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span>(<a class="code" href="group__SE__Fast.html#gae961b4fb4bb059a1d867447fc487aaee" title="Theorem(FALSE) which generated a conflict.">d_conflictTheorem</a>.<a class="code" href="classCVC3_1_1Theorem.html#a112466d9793abcf97015233ffdc4ec5e">getScope</a>() <= <a class="code" href="group__SE.html#ga640e08e2b051e08f2abdd4111b9a2e71" title="The bottom-most scope for the current call to checkSAT (where conflict clauses are still valid)...">d_bottomScope</a>) {</div>
<div class="line"><a name="l00952"></a><span class="lineno"> 952</span>  <a class="code" href="group__SE__Fast.html#gafa042a51f718c312ea7728f175958e35" title="Decision Engine.">d_decisionEngine</a>-><a class="code" href="group__DE.html#ga90d2e881c4cc004754708ee579682d85" title="Pop to given scope.">popTo</a>(<a class="code" href="group__SE.html#ga640e08e2b051e08f2abdd4111b9a2e71" title="The bottom-most scope for the current call to checkSAT (where conflict clauses are still valid)...">d_bottomScope</a>);</div>
<div class="line"><a name="l00953"></a><span class="lineno"> 953</span>  d_litsMaxScorePos = 0; <span class="comment">// from decision engine</span></div>
<div class="line"><a name="l00954"></a><span class="lineno"> 954</span>  <a class="code" href="group__SE__Fast.html#gadf72861b6482f6c585f3199d1436f7be" title="Clear the list of asserted literals (d_literals)">clearLiterals</a>();</div>
<div class="line"><a name="l00955"></a><span class="lineno"> 955</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00956"></a><span class="lineno"> 956</span>  }</div>
<div class="line"><a name="l00957"></a><span class="lineno"> 957</span> </div>
<div class="line"><a name="l00958"></a><span class="lineno"> 958</span>  <a class="code" href="group__SE__Fast.html#gab3f2a42375c5b3875ad18acd47ee124d" title="First pass in conflict analysis; takes a theorem of FALSE.">traceConflict</a>(<a class="code" href="group__SE__Fast.html#gae961b4fb4bb059a1d867447fc487aaee" title="Theorem(FALSE) which generated a conflict.">d_conflictTheorem</a>);</div>
<div class="line"><a name="l00959"></a><span class="lineno"> 959</span>  </div>
<div class="line"><a name="l00960"></a><span class="lineno"> 960</span>  <span class="keywordflow">if</span> (<a class="code" href="group__SE__Fast.html#gab27227ee9e005ab22a9e2a251bc7c6d1" title="The scope of the last conflict.">d_lastConflictScope</a> <= <a class="code" href="group__SE.html#ga640e08e2b051e08f2abdd4111b9a2e71" title="The bottom-most scope for the current call to checkSAT (where conflict clauses are still valid)...">d_bottomScope</a>)</div>
<div class="line"><a name="l00961"></a><span class="lineno"> 961</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00962"></a><span class="lineno"> 962</span> </div>
<div class="line"><a name="l00963"></a><span class="lineno"> 963</span>  <span class="comment">// If we have unit conflict clauses, then we have to bounce back to</span></div>
<div class="line"><a name="l00964"></a><span class="lineno"> 964</span>  <span class="comment">// the original scope and assert them.</span></div>
<div class="line"><a name="l00965"></a><span class="lineno"> 965</span>  <span class="keywordflow">if</span>(<a class="code" href="group__SE__Fast.html#gad05f577d00e93fefed74eb0c19015090" title="Unprocessed unit conflict clauses.">d_unitConflictClauses</a>.size() > 0) {</div>
<div class="line"><a name="l00966"></a><span class="lineno"> 966</span>  <a class="code" href="debug_8h.html#ad64155edafde9f067f4868817cd04bdf">TRACE_MSG</a>(<span class="stringliteral">"search basic"</span>, <span class="stringliteral">"Found unit conflict clause"</span>);</div>
<div class="line"><a name="l00967"></a><span class="lineno"> 967</span>  <a class="code" href="group__SE__Fast.html#gafa042a51f718c312ea7728f175958e35" title="Decision Engine.">d_decisionEngine</a>-><a class="code" href="group__DE.html#ga90d2e881c4cc004754708ee579682d85" title="Pop to given scope.">popTo</a>(<a class="code" href="group__SE.html#ga640e08e2b051e08f2abdd4111b9a2e71" title="The bottom-most scope for the current call to checkSAT (where conflict clauses are still valid)...">d_bottomScope</a>);</div>
<div class="line"><a name="l00968"></a><span class="lineno"> 968</span>  d_litsMaxScorePos = 0; <span class="comment">// from decision engine</span></div>
<div class="line"><a name="l00969"></a><span class="lineno"> 969</span>  <a class="code" href="group__SE__Fast.html#gadf72861b6482f6c585f3199d1436f7be" title="Clear the list of asserted literals (d_literals)">clearLiterals</a>();</div>
<div class="line"><a name="l00970"></a><span class="lineno"> 970</span>  <span class="keywordflow">for</span> (vector<Clause>::reverse_iterator i = <a class="code" href="group__SE__Fast.html#gad05f577d00e93fefed74eb0c19015090" title="Unprocessed unit conflict clauses.">d_unitConflictClauses</a>.rbegin();</div>
<div class="line"><a name="l00971"></a><span class="lineno"> 971</span>  i != <a class="code" href="group__SE__Fast.html#gad05f577d00e93fefed74eb0c19015090" title="Unprocessed unit conflict clauses.">d_unitConflictClauses</a>.rend();</div>
<div class="line"><a name="l00972"></a><span class="lineno"> 972</span>  ++i) {</div>
<div class="line"><a name="l00973"></a><span class="lineno"> 973</span>  <span class="comment">//IF_DEBUG(checkAssumpDebug(i->getTheorem(), d_assumptions);)</span></div>
<div class="line"><a name="l00974"></a><span class="lineno"> 974</span>  <span class="comment">// The theorem of *i is, most likely, (OR lit); rewrite it to just `lit'</span></div>
<div class="line"><a name="l00975"></a><span class="lineno"> 975</span>  <a class="code" href="classCVC3_1_1Theorem.html">Theorem</a> thm = i-><a class="code" href="classCVC3_1_1Clause.html#aa933cec7528780d7971be0c10b76dc02">getTheorem</a>();</div>
<div class="line"><a name="l00976"></a><span class="lineno"> 976</span>  <span class="keywordflow">if</span>(thm.<a class="code" href="classCVC3_1_1Theorem.html#af2b97ae5d270ddf1013bf4f3867a7e5d">getExpr</a>().<a class="code" href="group__ExprPkg.html#ga36f1eff876808586db368dc1b6da5f56">isOr</a>())</div>
<div class="line"><a name="l00977"></a><span class="lineno"> 977</span>  thm = <a class="code" href="group__SE.html#ga63f2a3cfcfa86820bea2f45cb890cc1c" title="Common proof rules.">d_commonRules</a>-><a class="code" href="classCVC3_1_1CommonProofRules.html#aebbcd4a194e4fdca0bcd16143fb03a75">iffMP</a>(thm, <a class="code" href="group__SE.html#ga63f2a3cfcfa86820bea2f45cb890cc1c" title="Common proof rules.">d_commonRules</a>-><a class="code" href="classCVC3_1_1CommonProofRules.html#aa3cfb7d47a6d6bc84c85c7fa6a3e1242" title="==> OR(e1,...,en) IFF [simplified expr]">rewriteOr</a>(thm.<a class="code" href="classCVC3_1_1Theorem.html#af2b97ae5d270ddf1013bf4f3867a7e5d">getExpr</a>()));</div>
<div class="line"><a name="l00978"></a><span class="lineno"> 978</span>  <a class="code" href="group__SE__Fast.html#ga2c71aa94289db9ece678963617660640" title="Queue up a fact to assert to the DPs later.">enqueueFact</a>(thm);</div>
<div class="line"><a name="l00979"></a><span class="lineno"> 979</span>  <a class="code" href="group__SE__Fast.html#ga6d190905fefb2a36650306e5b577dd9a" title="Commit all the enqueued facts to the DPs.">commitFacts</a>(); <span class="comment">// Make sure facts propagate to DPs</span></div>
<div class="line"><a name="l00980"></a><span class="lineno"> 980</span>  }</div>
<div class="line"><a name="l00981"></a><span class="lineno"> 981</span>  <a class="code" href="group__SE__Fast.html#gad05f577d00e93fefed74eb0c19015090" title="Unprocessed unit conflict clauses.">d_unitConflictClauses</a>.clear();</div>
<div class="line"><a name="l00982"></a><span class="lineno"> 982</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>; <span class="comment">// Let bcp take care of the rest.</span></div>
<div class="line"><a name="l00983"></a><span class="lineno"> 983</span>  }</div>
<div class="line"><a name="l00984"></a><span class="lineno"> 984</span> </div>
<div class="line"><a name="l00985"></a><span class="lineno"> 985</span>  <span class="comment">// Otherwise, we need to make our failure driven assertion.</span></div>
<div class="line"><a name="l00986"></a><span class="lineno"> 986</span>  <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(!<a class="code" href="group__SE__Fast.html#ga46e91bb5d782794c6dca6abaa99dc4f9" title="The last conflict clause (for checkSAT()). May be Null.">d_lastConflictClause</a>.<a class="code" href="classCVC3_1_1Clause.html#a60c298aa79d5cec791f8eeef2086e92f">isNull</a>(), <span class="stringliteral">""</span>);</div>
<div class="line"><a name="l00987"></a><span class="lineno"> 987</span> </div>
<div class="line"><a name="l00988"></a><span class="lineno"> 988</span>  <span class="comment">// We need to calculate the backtracking level. We do this by</span></div>
<div class="line"><a name="l00989"></a><span class="lineno"> 989</span>  <span class="comment">// examining the decision levels of all the literals involved in the</span></div>
<div class="line"><a name="l00990"></a><span class="lineno"> 990</span>  <span class="comment">// last conflict clause.</span></div>
<div class="line"><a name="l00991"></a><span class="lineno"> 991</span> </div>
<div class="line"><a name="l00992"></a><span class="lineno"> 992</span>  <a class="code" href="classCVC3_1_1Clause.html" title="A class representing a CNF clause (a smart pointer)">Clause</a> &c = <a class="code" href="group__SE__Fast.html#ga46e91bb5d782794c6dca6abaa99dc4f9" title="The last conflict clause (for checkSAT()). May be Null.">d_lastConflictClause</a>;</div>
<div class="line"><a name="l00993"></a><span class="lineno"> 993</span>  <a class="code" href="classCVC3_1_1Literal.html">Literal</a> unit_lit;</div>
<div class="line"><a name="l00994"></a><span class="lineno"> 994</span>  <span class="keywordtype">unsigned</span> idx=0;</div>
<div class="line"><a name="l00995"></a><span class="lineno"> 995</span>  <span class="keywordtype">unsigned</span> current_dl = <a class="code" href="group__SE__Fast.html#gab27227ee9e005ab22a9e2a251bc7c6d1" title="The scope of the last conflict.">d_lastConflictScope</a>;</div>
<div class="line"><a name="l00996"></a><span class="lineno"> 996</span>  <span class="keywordtype">unsigned</span> back_dl = <a class="code" href="group__SE.html#ga640e08e2b051e08f2abdd4111b9a2e71" title="The bottom-most scope for the current call to checkSAT (where conflict clauses are still valid)...">d_bottomScope</a>;</div>
<div class="line"><a name="l00997"></a><span class="lineno"> 997</span>  <span class="keywordflow">for</span> (<span class="keywordtype">unsigned</span> i = 0; i < c.<a class="code" href="classCVC3_1_1Clause.html#a7cfde40c65fc8eb4f733094fad07dfa1">size</a>(); ++i) {</div>
<div class="line"><a name="l00998"></a><span class="lineno"> 998</span>  <span class="keywordtype">unsigned</span> dl = c[i].getVar().getScope();</div>
<div class="line"><a name="l00999"></a><span class="lineno"> 999</span>  <span class="keywordflow">if</span> (dl < current_dl) {</div>
<div class="line"><a name="l01000"></a><span class="lineno"> 1000</span>  <span class="keywordflow">if</span> (dl > back_dl)</div>
<div class="line"><a name="l01001"></a><span class="lineno"> 1001</span>  back_dl = dl;</div>
<div class="line"><a name="l01002"></a><span class="lineno"> 1002</span>  }</div>
<div class="line"><a name="l01003"></a><span class="lineno"> 1003</span>  <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l01004"></a><span class="lineno"> 1004</span>  <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(unit_lit.<a class="code" href="classCVC3_1_1Literal.html#a4a2e0a421bfcb590c3a7964d2583a94c">getExpr</a>().<a class="code" href="group__ExprPkg.html#ga0265d1ca42fa59c95aaff3ca675b6504">isNull</a>(),</div>
<div class="line"><a name="l01005"></a><span class="lineno"> 1005</span>  <span class="stringliteral">"Only one lit from the current decision level is allowed.\n"</span></div>
<div class="line"><a name="l01006"></a><span class="lineno"> 1006</span>  <span class="stringliteral">"current_dl="</span></div>
<div class="line"><a name="l01007"></a><span class="lineno"> 1007</span>  +<a class="code" href="namespaceCVC3.html#af69618103f1f0f2eadada0796a2a940c">int2string</a>(current_dl)+<span class="stringliteral">", scopeLevel="</span></div>
<div class="line"><a name="l01008"></a><span class="lineno"> 1008</span>  +<a class="code" href="namespaceCVC3.html#af69618103f1f0f2eadada0796a2a940c">int2string</a>(<a class="code" href="group__SE.html#gab267d9f29c30c8e26b5c7bcc4d15306a" title="Return the current scope level (for convenience)">scopeLevel</a>())</div>
<div class="line"><a name="l01009"></a><span class="lineno"> 1009</span>  +<span class="stringliteral">"\n l1 = "</span></div>
<div class="line"><a name="l01010"></a><span class="lineno"> 1010</span>  +unit_lit.<a class="code" href="classCVC3_1_1Literal.html#aff53e6b3e4da8c649816441046983a30">toString</a>()</div>
<div class="line"><a name="l01011"></a><span class="lineno"> 1011</span>  +<span class="stringliteral">"\n l2 = "</span>+c[i].toString()</div>
<div class="line"><a name="l01012"></a><span class="lineno"> 1012</span>  +<span class="stringliteral">"\nConflict clause: "</span>+c.toString());</div>
<div class="line"><a name="l01013"></a><span class="lineno"> 1013</span>  unit_lit = c[i];</div>
<div class="line"><a name="l01014"></a><span class="lineno"> 1014</span>  idx = i;</div>
<div class="line"><a name="l01015"></a><span class="lineno"> 1015</span>  }</div>
<div class="line"><a name="l01016"></a><span class="lineno"> 1016</span>  }</div>
<div class="line"><a name="l01017"></a><span class="lineno"> 1017</span> </div>
<div class="line"><a name="l01018"></a><span class="lineno"> 1018</span> </div>
<div class="line"><a name="l01019"></a><span class="lineno"> 1019</span>  <span class="comment">// Now we have the backtracking decision level.</span></div>
<div class="line"><a name="l01020"></a><span class="lineno"> 1020</span>  <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(!unit_lit.<a class="code" href="classCVC3_1_1Literal.html#a4a2e0a421bfcb590c3a7964d2583a94c">getExpr</a>().<a class="code" href="group__ExprPkg.html#ga0265d1ca42fa59c95aaff3ca675b6504">isNull</a>(),<span class="stringliteral">"Need to have an FDA in "</span></div>
<div class="line"><a name="l01021"></a><span class="lineno"> 1021</span>  <span class="stringliteral">"conflict clause: "</span>+c.toString());</div>
<div class="line"><a name="l01022"></a><span class="lineno"> 1022</span>  <a class="code" href="group__SE__Fast.html#gafa042a51f718c312ea7728f175958e35" title="Decision Engine.">d_decisionEngine</a>-><a class="code" href="group__DE.html#ga90d2e881c4cc004754708ee579682d85" title="Pop to given scope.">popTo</a>(back_dl);</div>
<div class="line"><a name="l01023"></a><span class="lineno"> 1023</span>  d_litsMaxScorePos = 0; <span class="comment">// from decision engine</span></div>
<div class="line"><a name="l01024"></a><span class="lineno"> 1024</span>  <a class="code" href="group__SE__Fast.html#gadf72861b6482f6c585f3199d1436f7be" title="Clear the list of asserted literals (d_literals)">clearLiterals</a>();</div>
<div class="line"><a name="l01025"></a><span class="lineno"> 1025</span>  <a class="code" href="group__SE__Fast.html#ga88d524fb175ae8156696cc73cb182ffd" title="Do the unit propagation for the clause.">unitPropagation</a>(c,idx);</div>
<div class="line"><a name="l01026"></a><span class="lineno"> 1026</span>  <a class="code" href="group__SE__Fast.html#ga6d190905fefb2a36650306e5b577dd9a" title="Commit all the enqueued facts to the DPs.">commitFacts</a>(); <span class="comment">// Make sure facts propagate to DPs</span></div>
<div class="line"><a name="l01027"></a><span class="lineno"> 1027</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a name="l01028"></a><span class="lineno"> 1028</span> }</div>
<div class="line"><a name="l01029"></a><span class="lineno"> 1029</span> </div>
<div class="line"><a name="l01030"></a><span class="lineno"> 1030</span> </div>
<div class="line"><a name="l01031"></a><span class="lineno"><a class="code" href="group__SE__Fast.html#ga2c71aa94289db9ece678963617660640"> 1031</a></span> <span class="keywordtype">void</span> <a class="code" href="group__SE__Fast.html#ga2c71aa94289db9ece678963617660640" title="Queue up a fact to assert to the DPs later.">SearchEngineFast::enqueueFact</a>(<span class="keyword">const</span> <a class="code" href="classCVC3_1_1Theorem.html">Theorem</a>& thm) {</div>
<div class="line"><a name="l01032"></a><span class="lineno"> 1032</span>  <span class="comment">// d_core->addFact(thm);</span></div>
<div class="line"><a name="l01033"></a><span class="lineno"> 1033</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"search props"</span>, <span class="stringliteral">"SearchEngineFast::enqueueFact("</span>,</div>
<div class="line"><a name="l01034"></a><span class="lineno"> 1034</span>  thm.<a class="code" href="classCVC3_1_1Theorem.html#af2b97ae5d270ddf1013bf4f3867a7e5d">getExpr</a>(), <span class="stringliteral">") {"</span>);</div>
<div class="line"><a name="l01035"></a><span class="lineno"> 1035</span>  <span class="keywordflow">if</span>(thm.<a class="code" href="classCVC3_1_1Theorem.html#aed1590a02166f6099e5538dbf681a60c" title="Check if the theorem is a literal.">isAbsLiteral</a>()) {</div>
<div class="line"><a name="l01036"></a><span class="lineno"> 1036</span>  <a class="code" href="group__SE__Fast.html#gaef3113afb8dc9ea1b06217ab77f5d713" title="Notify the search engine about a new literal fact.">addLiteralFact</a>(thm);</div>
<div class="line"><a name="l01037"></a><span class="lineno"> 1037</span>  }</div>
<div class="line"><a name="l01038"></a><span class="lineno"> 1038</span>  <a class="code" href="group__SE__Fast.html#ga4b05dccebac3de019dc112ab3dffc988" title="Queue of derived facts to be sent to DPs.">d_factQueue</a>.push_back(thm);</div>
<div class="line"><a name="l01039"></a><span class="lineno"> 1039</span>  <a class="code" href="debug_8h.html#ad64155edafde9f067f4868817cd04bdf">TRACE_MSG</a>(<span class="stringliteral">"search props"</span>, <span class="stringliteral">"SearchEngineFast::enqueueFact => }"</span>);</div>
<div class="line"><a name="l01040"></a><span class="lineno"> 1040</span> }</div>
<div class="line"><a name="l01041"></a><span class="lineno"> 1041</span> </div>
<div class="line"><a name="l01042"></a><span class="lineno"> 1042</span> </div>
<div class="line"><a name="l01043"></a><span class="lineno"><a class="code" href="group__SE__Fast.html#ga33ff53b3eeb9811b1510fffd3cdcf234"> 1043</a></span> <span class="keywordtype">void</span> <a class="code" href="group__SE__Fast.html#ga33ff53b3eeb9811b1510fffd3cdcf234" title="Set the context inconsistent. Takes Theorem(FALSE).">SearchEngineFast::setInconsistent</a>(<span class="keyword">const</span> <a class="code" href="classCVC3_1_1Theorem.html">Theorem</a>& thm) {</div>
<div class="line"><a name="l01044"></a><span class="lineno"> 1044</span>  <a class="code" href="debug_8h.html#ad64155edafde9f067f4868817cd04bdf">TRACE_MSG</a>(<span class="stringliteral">"search props"</span>, <span class="stringliteral">"SearchEngineFast::setInconsistent()"</span>);</div>
<div class="line"><a name="l01045"></a><span class="lineno"> 1045</span>  <a class="code" href="group__SE__Fast.html#ga4b05dccebac3de019dc112ab3dffc988" title="Queue of derived facts to be sent to DPs.">d_factQueue</a>.clear();</div>
<div class="line"><a name="l01046"></a><span class="lineno"> 1046</span>  <a class="code" href="debug_8h.html#a600cb2d68efe7cc413cccbb5714c7016">IF_DEBUG</a>(debugger.counter(<span class="stringliteral">"conflicts from SAT solver"</span>)++;)</div>
<div class="line"><a name="l01047"></a><span class="lineno"> 1047</span>  <a class="code" href="group__SE.html#ga3772c6af7eac91b9ed7fc278edf5ef90" title="Access to theory reasoning.">d_core</a>-><a class="code" href="classCVC3_1_1TheoryCore.html#a4a87431f344c128dc58d5c2bd9206784">setInconsistent</a>(thm);</div>
<div class="line"><a name="l01048"></a><span class="lineno"> 1048</span> }</div>
<div class="line"><a name="l01049"></a><span class="lineno"> 1049</span> </div>
<div class="line"><a name="l01050"></a><span class="lineno"><a class="code" href="group__SE__Fast.html#ga6d190905fefb2a36650306e5b577dd9a"> 1050</a></span> <span class="keywordtype">void</span> <a class="code" href="group__SE__Fast.html#ga6d190905fefb2a36650306e5b577dd9a" title="Commit all the enqueued facts to the DPs.">SearchEngineFast::commitFacts</a>() {</div>
<div class="line"><a name="l01051"></a><span class="lineno"> 1051</span>  <span class="keywordflow">for</span>(vector<Theorem>::iterator i=<a class="code" href="group__SE__Fast.html#ga4b05dccebac3de019dc112ab3dffc988" title="Queue of derived facts to be sent to DPs.">d_factQueue</a>.begin(), iend=<a class="code" href="group__SE__Fast.html#ga4b05dccebac3de019dc112ab3dffc988" title="Queue of derived facts to be sent to DPs.">d_factQueue</a>.end();</div>
<div class="line"><a name="l01052"></a><span class="lineno"> 1052</span>  i!=iend; ++i) {</div>
<div class="line"><a name="l01053"></a><span class="lineno"> 1053</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"search props"</span>, <span class="stringliteral">"commitFacts("</span>, i->getExpr(), <span class="stringliteral">")"</span>);</div>
<div class="line"><a name="l01054"></a><span class="lineno"> 1054</span>  <span class="keywordflow">if</span>(<a class="code" href="group__SE__Fast.html#gaa1ea8707c10a13a631402860eff87026" title="When true, use TheoryCore::enqueueFact() instead of addFact() in commitFacts()">d_useEnqueueFact</a>)</div>
<div class="line"><a name="l01055"></a><span class="lineno"> 1055</span>  <a class="code" href="group__SE.html#ga3772c6af7eac91b9ed7fc278edf5ef90" title="Access to theory reasoning.">d_core</a>-><a class="code" href="classCVC3_1_1TheoryCore.html#a0ceab59114fc3864bac9a347c61ec444" title="Enqueue a new fact.">enqueueFact</a>(*i);</div>
<div class="line"><a name="l01056"></a><span class="lineno"> 1056</span>  <span class="keywordflow">else</span></div>
<div class="line"><a name="l01057"></a><span class="lineno"> 1057</span>  <a class="code" href="group__SE.html#ga3772c6af7eac91b9ed7fc278edf5ef90" title="Access to theory reasoning.">d_core</a>-><a class="code" href="classCVC3_1_1TheoryCore.html#aecef2465eb761f7f112ddce77f93d081" title="Add a new assertion to the core from the user or a SAT solver. Do NOT use it in a decision procedure;...">addFact</a>(*i);</div>
<div class="line"><a name="l01058"></a><span class="lineno"> 1058</span>  }</div>
<div class="line"><a name="l01059"></a><span class="lineno"> 1059</span>  <a class="code" href="group__SE__Fast.html#ga4b05dccebac3de019dc112ab3dffc988" title="Queue of derived facts to be sent to DPs.">d_factQueue</a>.clear();</div>
<div class="line"><a name="l01060"></a><span class="lineno"> 1060</span> }</div>
<div class="line"><a name="l01061"></a><span class="lineno"> 1061</span> </div>
<div class="line"><a name="l01062"></a><span class="lineno"> 1062</span> </div>
<div class="line"><a name="l01063"></a><span class="lineno"><a class="code" href="group__SE__Fast.html#gafa7937cc0b7d14c0aafb1f9c20abf011"> 1063</a></span> <span class="keywordtype">void</span> <a class="code" href="group__SE__Fast.html#gafa7937cc0b7d14c0aafb1f9c20abf011" title="Clear the local fact queue.">SearchEngineFast::clearFacts</a>() {</div>
<div class="line"><a name="l01064"></a><span class="lineno"> 1064</span>  <a class="code" href="debug_8h.html#ad64155edafde9f067f4868817cd04bdf">TRACE_MSG</a>(<span class="stringliteral">"search props"</span>, <span class="stringliteral">"clearFacts()"</span>);</div>
<div class="line"><a name="l01065"></a><span class="lineno"> 1065</span>  <a class="code" href="group__SE__Fast.html#ga4b05dccebac3de019dc112ab3dffc988" title="Queue of derived facts to be sent to DPs.">d_factQueue</a>.clear();</div>
<div class="line"><a name="l01066"></a><span class="lineno"> 1066</span> }</div>
<div class="line"><a name="l01067"></a><span class="lineno"> 1067</span> </div>
<div class="line"><a name="l01068"></a><span class="lineno"> 1068</span> </div>
<div class="line"><a name="l01069"></a><span class="lineno"><a class="code" href="group__SE__Fast.html#ga6e64b8f0a42bd4b42d22b50b351219c9"> 1069</a></span> <span class="keywordtype">void</span> <a class="code" href="group__SE__Fast.html#ga6e64b8f0a42bd4b42d22b50b351219c9" title="Go through all the clauses and check the watch pointers (for debugging)">SearchEngineFast::addNewClause</a>(<a class="code" href="classCVC3_1_1Clause.html" title="A class representing a CNF clause (a smart pointer)">Clause</a> &c)</div>
<div class="line"><a name="l01070"></a><span class="lineno"> 1070</span> {</div>
<div class="line"><a name="l01071"></a><span class="lineno"> 1071</span>  <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(c.<a class="code" href="classCVC3_1_1Clause.html#a7cfde40c65fc8eb4f733094fad07dfa1">size</a>() > 1, <span class="stringliteral">"New clauses should have size > 1"</span>);</div>
<div class="line"><a name="l01072"></a><span class="lineno"> 1072</span>  <a class="code" href="group__SE__Fast.html#gaa1dd9a29eac4c7da6c669d7888909ca5" title="Backtrackable list of clauses.">d_clauses</a>.<a class="code" href="classCVC3_1_1CDList.html#aa1e8d3591c596d1b9c585dec955b519b">push_back</a>(c);</div>
<div class="line"><a name="l01073"></a><span class="lineno"> 1073</span>  <a class="code" href="group__SE__Fast.html#ga775b06e155128cc8817f254bc293c6c6" title="Add the literals of a new clause to d_litsByScores.">updateLitCounts</a>(c);</div>
<div class="line"><a name="l01074"></a><span class="lineno"> 1074</span>  <span class="comment">// Set up the watch pointers to this clause: find two unassigned</span></div>
<div class="line"><a name="l01075"></a><span class="lineno"> 1075</span>  <span class="comment">// literals (otherwise we shouldn't even receive it as a clause)</span></div>
<div class="line"><a name="l01076"></a><span class="lineno"> 1076</span>  <span class="keywordtype">size_t</span> i=0, iend=c.<a class="code" href="classCVC3_1_1Clause.html#a7cfde40c65fc8eb4f733094fad07dfa1">size</a>();</div>
<div class="line"><a name="l01077"></a><span class="lineno"> 1077</span>  <span class="keywordflow">for</span>(; i<iend && c[i].getValue() != 0; ++i);</div>
<div class="line"><a name="l01078"></a><span class="lineno"> 1078</span>  <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(i<iend, <span class="stringliteral">"SearchEngineFast::addNewClause:\n"</span></div>
<div class="line"><a name="l01079"></a><span class="lineno"> 1079</span>  <span class="stringliteral">"no unassigned literals in the clause:\nc = "</span></div>
<div class="line"><a name="l01080"></a><span class="lineno"> 1080</span>  +<a class="code" href="classCVC3_1_1CompactClause.html">CompactClause</a>(c).toString());</div>
<div class="line"><a name="l01081"></a><span class="lineno"> 1081</span>  c.<a class="code" href="classCVC3_1_1Clause.html#ad399ff73eb62edf9cc4d1135e91afdcb">wp</a>(0,i); ++i;</div>
<div class="line"><a name="l01082"></a><span class="lineno"> 1082</span>  <span class="keywordflow">for</span>(; i<iend && c[i].getValue() != 0; ++i);</div>
<div class="line"><a name="l01083"></a><span class="lineno"> 1083</span>  <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(i<iend, <span class="stringliteral">"SearchEngineFast::addNewClause:\n"</span></div>
<div class="line"><a name="l01084"></a><span class="lineno"> 1084</span>  <span class="stringliteral">"Only one unassigned literal in the clause:\nc = "</span></div>
<div class="line"><a name="l01085"></a><span class="lineno"> 1085</span>  +<a class="code" href="classCVC3_1_1CompactClause.html">CompactClause</a>(c).toString());</div>
<div class="line"><a name="l01086"></a><span class="lineno"> 1086</span>  c.<a class="code" href="classCVC3_1_1Clause.html#ad399ff73eb62edf9cc4d1135e91afdcb">wp</a>(1,i);</div>
<div class="line"><a name="l01087"></a><span class="lineno"> 1087</span>  <span class="comment">// Add the watched pointers to the appropriate lists</span></div>
<div class="line"><a name="l01088"></a><span class="lineno"> 1088</span>  <span class="keywordflow">for</span>(<span class="keywordtype">int</span> i=0; i<=1; i++) {</div>
<div class="line"><a name="l01089"></a><span class="lineno"> 1089</span>  <a class="code" href="classCVC3_1_1Literal.html">Literal</a> l(!c.<a class="code" href="classCVC3_1_1Clause.html#a4a2b1e46395f03fe87a6a5b7558292f0">watched</a>(i));</div>
<div class="line"><a name="l01090"></a><span class="lineno"> 1090</span>  <span class="comment">// Add the pointer to l's list</span></div>
<div class="line"><a name="l01091"></a><span class="lineno"> 1091</span>  pair<Clause, int> p(c, i);</div>
<div class="line"><a name="l01092"></a><span class="lineno"> 1092</span>  <a class="code" href="group__SE__Fast.html#ga8f4353c8f8c65ed00806861471bd857f" title="Return a ref to the vector of watched literals. If no such vector exists, create it.">wp</a>(l).push_back(p);</div>
<div class="line"><a name="l01093"></a><span class="lineno"> 1093</span>  }</div>
<div class="line"><a name="l01094"></a><span class="lineno"> 1094</span> }</div>
<div class="line"><a name="l01095"></a><span class="lineno"> 1095</span> </div>
<div class="line"><a name="l01096"></a><span class="lineno"><a class="code" href="search__fast_8cpp.html#a262e92a64449205cbd952a704be68952"> 1096</a></span> <span class="keyword">inline</span> <span class="keywordtype">bool</span> <a class="code" href="search__fast_8cpp.html#a262e92a64449205cbd952a704be68952">TheoremEq</a>(<span class="keyword">const</span> <a class="code" href="classCVC3_1_1Theorem.html">Theorem</a>& t1, <span class="keyword">const</span> <a class="code" href="classCVC3_1_1Theorem.html">Theorem</a>& t2) {</div>
<div class="line"><a name="l01097"></a><span class="lineno"> 1097</span>  <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(!t1.<a class="code" href="classCVC3_1_1Theorem.html#afc6fdb0507eb3669e28d9be5ed0bd333">isNull</a>() && !t2.<a class="code" href="classCVC3_1_1Theorem.html#afc6fdb0507eb3669e28d9be5ed0bd333">isNull</a>(),</div>
<div class="line"><a name="l01098"></a><span class="lineno"> 1098</span>  <span class="stringliteral">"analyzeUIPs() Null Theorem found"</span>);</div>
<div class="line"><a name="l01099"></a><span class="lineno"> 1099</span>  <span class="keywordflow">return</span> t1.<a class="code" href="classCVC3_1_1Theorem.html#af2b97ae5d270ddf1013bf4f3867a7e5d">getExpr</a>() == t2.<a class="code" href="classCVC3_1_1Theorem.html#af2b97ae5d270ddf1013bf4f3867a7e5d">getExpr</a>();</div>
<div class="line"><a name="l01100"></a><span class="lineno"> 1100</span> }</div>
<div class="line"><a name="l01101"></a><span class="lineno"> 1101</span> </div>
<div class="line"><a name="l01102"></a><span class="lineno"> 1102</span> <span class="comment"></span></div>
<div class="line"><a name="l01103"></a><span class="lineno"> 1103</span> <span class="comment">//! Auxiliary function used in analyzeUIPs()</span></div>
<div class="line"><a name="l01104"></a><span class="lineno"> 1104</span> <span class="comment"></span><span class="comment">/*! It processes a node and populates the relevant sets used in the</span></div>
<div class="line"><a name="l01105"></a><span class="lineno"> 1105</span> <span class="comment"> * algorithm.</span></div>
<div class="line"><a name="l01106"></a><span class="lineno"> 1106</span> <span class="comment"> * \sa analyzeUIPs() for more detail). </span></div>
<div class="line"><a name="l01107"></a><span class="lineno"> 1107</span> <span class="comment"> */</span></div>
<div class="line"><a name="l01108"></a><span class="lineno"><a class="code" href="search__fast_8cpp.html#a0ffbe582e8cf359e6b82a5bfc8c028ed"> 1108</a></span> <span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code" href="search__fast_8cpp.html#a0ffbe582e8cf359e6b82a5bfc8c028ed" title="Auxiliary function used in analyzeUIPs()">processNode</a>(<span class="keyword">const</span> <a class="code" href="classCVC3_1_1Theorem.html">Theorem</a>& thm, </div>
<div class="line"><a name="l01109"></a><span class="lineno"> 1109</span>  vector<Theorem>& lits,</div>
<div class="line"><a name="l01110"></a><span class="lineno"> 1110</span>  vector<Theorem>& gamma,</div>
<div class="line"><a name="l01111"></a><span class="lineno"> 1111</span>  vector<Theorem>& fringe,</div>
<div class="line"><a name="l01112"></a><span class="lineno"> 1112</span>  <span class="keywordtype">int</span>& pending) {</div>
<div class="line"><a name="l01113"></a><span class="lineno"> 1113</span>  <span class="comment">// Decrease the fan-out count</span></div>
<div class="line"><a name="l01114"></a><span class="lineno"> 1114</span>  <span class="keywordtype">int</span> fanOutCount(thm.<a class="code" href="classCVC3_1_1Theorem.html#a0062fd610006e5bc0b4093ae72943342" title="Check if the flag attribute is set.">getCachedValue</a>() - 1);</div>
<div class="line"><a name="l01115"></a><span class="lineno"> 1115</span>  thm.<a class="code" href="classCVC3_1_1Theorem.html#a293ebbc3162763fbbeaa9fbd8ea1c657" title="Check if the flag attribute is set.">setCachedValue</a>(fanOutCount);</div>
<div class="line"><a name="l01116"></a><span class="lineno"> 1116</span>  <span class="keywordtype">bool</span> wasFlagged(thm.<a class="code" href="classCVC3_1_1Theorem.html#a1695c9afc9a5c1f8cd000d40b9e2a9cd" title="Check if the flag attribute is set.">isFlagged</a>());</div>
<div class="line"><a name="l01117"></a><span class="lineno"> 1117</span>  thm.<a class="code" href="classCVC3_1_1Theorem.html#af83d6b4d71bfb558296a1c296a69c3d7" title="Set the flag attribute.">setFlag</a>();</div>
<div class="line"><a name="l01118"></a><span class="lineno"> 1118</span>  <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(fanOutCount >= 0, </div>
<div class="line"><a name="l01119"></a><span class="lineno"> 1119</span>  <span class="stringliteral">"analyzeUIPs(): node visited too many times: "</span></div>
<div class="line"><a name="l01120"></a><span class="lineno"> 1120</span>  +thm.<a class="code" href="classCVC3_1_1Theorem.html#ac4b1c9570ffb9cc901627ef2abb9ff77">toString</a>());</div>
<div class="line"><a name="l01121"></a><span class="lineno"> 1121</span>  <span class="keywordflow">if</span>(fanOutCount == 0) {</div>
<div class="line"><a name="l01122"></a><span class="lineno"> 1122</span>  <span class="keywordflow">if</span>(thm.<a class="code" href="classCVC3_1_1Theorem.html#a2eefa550b2e04a012adc03ba456af38b" title="Check the "expand" attribute.">getExpandFlag</a>()) {</div>
<div class="line"><a name="l01123"></a><span class="lineno"> 1123</span>  <span class="keywordflow">if</span>(wasFlagged) {</div>
<div class="line"><a name="l01124"></a><span class="lineno"> 1124</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"impl graph"</span>, <span class="stringliteral">"pending.erase("</span>, thm.<a class="code" href="classCVC3_1_1Theorem.html#af2b97ae5d270ddf1013bf4f3867a7e5d">getExpr</a>(), <span class="stringliteral">")"</span>);</div>
<div class="line"><a name="l01125"></a><span class="lineno"> 1125</span>  <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(pending > 0, </div>
<div class="line"><a name="l01126"></a><span class="lineno"> 1126</span>  <span class="stringliteral">"analyzeUIPs(): pending set shouldn't be empty here"</span>);</div>
<div class="line"><a name="l01127"></a><span class="lineno"> 1127</span>  pending--;</div>
<div class="line"><a name="l01128"></a><span class="lineno"> 1128</span>  }</div>
<div class="line"><a name="l01129"></a><span class="lineno"> 1129</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"impl graph"</span>, <span class="stringliteral">"fringe.insert("</span>, thm.<a class="code" href="classCVC3_1_1Theorem.html#af2b97ae5d270ddf1013bf4f3867a7e5d">getExpr</a>(), <span class="stringliteral">")"</span>);</div>
<div class="line"><a name="l01130"></a><span class="lineno"> 1130</span>  fringe.push_back(thm);</div>
<div class="line"><a name="l01131"></a><span class="lineno"> 1131</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(thm.<a class="code" href="classCVC3_1_1Theorem.html#a8442e9bc88086d84648ccea5b373cdb0" title="Check the "literal" attribute.">getLitFlag</a>()) {</div>
<div class="line"><a name="l01132"></a><span class="lineno"> 1132</span>  <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(thm.<a class="code" href="classCVC3_1_1Theorem.html#aed1590a02166f6099e5538dbf681a60c" title="Check if the theorem is a literal.">isAbsLiteral</a>(), <span class="stringliteral">"analyzeUIPs(): bad flag on "</span></div>
<div class="line"><a name="l01133"></a><span class="lineno"> 1133</span>  +thm.<a class="code" href="classCVC3_1_1Theorem.html#ac4b1c9570ffb9cc901627ef2abb9ff77">toString</a>());</div>
<div class="line"><a name="l01134"></a><span class="lineno"> 1134</span>  <span class="keywordflow">if</span>(wasFlagged) {</div>
<div class="line"><a name="l01135"></a><span class="lineno"> 1135</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"impl graph"</span>, <span class="stringliteral">"pending.erase("</span>, thm.<a class="code" href="classCVC3_1_1Theorem.html#af2b97ae5d270ddf1013bf4f3867a7e5d">getExpr</a>(), <span class="stringliteral">")"</span>);</div>
<div class="line"><a name="l01136"></a><span class="lineno"> 1136</span>  <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(pending > 0, </div>
<div class="line"><a name="l01137"></a><span class="lineno"> 1137</span>  <span class="stringliteral">"analyzeUIPs(): pending set shouldn't be empty here"</span>);</div>
<div class="line"><a name="l01138"></a><span class="lineno"> 1138</span>  pending--;</div>
<div class="line"><a name="l01139"></a><span class="lineno"> 1139</span>  }</div>
<div class="line"><a name="l01140"></a><span class="lineno"> 1140</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"impl graph"</span>, <span class="stringliteral">"lits.insert("</span>, thm.<a class="code" href="classCVC3_1_1Theorem.html#af2b97ae5d270ddf1013bf4f3867a7e5d">getExpr</a>(), <span class="stringliteral">")"</span>);</div>
<div class="line"><a name="l01141"></a><span class="lineno"> 1141</span>  lits.push_back(thm);</div>
<div class="line"><a name="l01142"></a><span class="lineno"> 1142</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l01143"></a><span class="lineno"> 1143</span>  <span class="keywordflow">if</span>(!wasFlagged) {</div>
<div class="line"><a name="l01144"></a><span class="lineno"> 1144</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"impl graph"</span>, <span class="stringliteral">"gamma.insert("</span>, thm.<a class="code" href="classCVC3_1_1Theorem.html#af2b97ae5d270ddf1013bf4f3867a7e5d">getExpr</a>(), <span class="stringliteral">")"</span>);</div>
<div class="line"><a name="l01145"></a><span class="lineno"> 1145</span>  gamma.push_back(thm);</div>
<div class="line"><a name="l01146"></a><span class="lineno"> 1146</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l01147"></a><span class="lineno"> 1147</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"impl graph"</span>, <span class="stringliteral">"already in gamma: "</span>, thm.<a class="code" href="classCVC3_1_1Theorem.html#af2b97ae5d270ddf1013bf4f3867a7e5d">getExpr</a>(), <span class="stringliteral">""</span>);</div>
<div class="line"><a name="l01148"></a><span class="lineno"> 1148</span>  }</div>
<div class="line"><a name="l01149"></a><span class="lineno"> 1149</span>  }</div>
<div class="line"><a name="l01150"></a><span class="lineno"> 1150</span>  } <span class="keywordflow">else</span> { <span class="comment">// Fan-out count is non-zero</span></div>
<div class="line"><a name="l01151"></a><span class="lineno"> 1151</span>  <span class="keywordflow">if</span>(thm.<a class="code" href="classCVC3_1_1Theorem.html#a2eefa550b2e04a012adc03ba456af38b" title="Check the "expand" attribute.">getExpandFlag</a>()) {</div>
<div class="line"><a name="l01152"></a><span class="lineno"> 1152</span>  <span class="comment">// Too early to expand; stash in pending</span></div>
<div class="line"><a name="l01153"></a><span class="lineno"> 1153</span>  <span class="keywordflow">if</span>(!wasFlagged) {</div>
<div class="line"><a name="l01154"></a><span class="lineno"> 1154</span>  pending++;</div>
<div class="line"><a name="l01155"></a><span class="lineno"> 1155</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"impl graph"</span>, <span class="stringliteral">"pending.insert("</span>, thm.<a class="code" href="classCVC3_1_1Theorem.html#af2b97ae5d270ddf1013bf4f3867a7e5d">getExpr</a>(), <span class="stringliteral">")"</span>);</div>
<div class="line"><a name="l01156"></a><span class="lineno"> 1156</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l01157"></a><span class="lineno"> 1157</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"impl graph"</span>, <span class="stringliteral">"already in pending: "</span>, thm.<a class="code" href="classCVC3_1_1Theorem.html#af2b97ae5d270ddf1013bf4f3867a7e5d">getExpr</a>(), <span class="stringliteral">""</span>);</div>
<div class="line"><a name="l01158"></a><span class="lineno"> 1158</span>  }</div>
<div class="line"><a name="l01159"></a><span class="lineno"> 1159</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(thm.<a class="code" href="classCVC3_1_1Theorem.html#a8442e9bc88086d84648ccea5b373cdb0" title="Check the "literal" attribute.">getLitFlag</a>()) {</div>
<div class="line"><a name="l01160"></a><span class="lineno"> 1160</span>  <span class="comment">// It's a literal which goes into pending</span></div>
<div class="line"><a name="l01161"></a><span class="lineno"> 1161</span>  <span class="keywordflow">if</span>(!wasFlagged) {</div>
<div class="line"><a name="l01162"></a><span class="lineno"> 1162</span>  pending++;</div>
<div class="line"><a name="l01163"></a><span class="lineno"> 1163</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"impl graph"</span>, <span class="stringliteral">"pending.insert("</span>, thm.<a class="code" href="classCVC3_1_1Theorem.html#af2b97ae5d270ddf1013bf4f3867a7e5d">getExpr</a>(), <span class="stringliteral">")"</span>);</div>
<div class="line"><a name="l01164"></a><span class="lineno"> 1164</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l01165"></a><span class="lineno"> 1165</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"impl graph"</span>, <span class="stringliteral">"already in pending: "</span>, thm.<a class="code" href="classCVC3_1_1Theorem.html#af2b97ae5d270ddf1013bf4f3867a7e5d">getExpr</a>(), <span class="stringliteral">""</span>);</div>
<div class="line"><a name="l01166"></a><span class="lineno"> 1166</span>  }</div>
<div class="line"><a name="l01167"></a><span class="lineno"> 1167</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l01168"></a><span class="lineno"> 1168</span>  <span class="keywordflow">if</span>(!wasFlagged) {</div>
<div class="line"><a name="l01169"></a><span class="lineno"> 1169</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"impl graph"</span>, <span class="stringliteral">"gamma.insert("</span>, thm.<a class="code" href="classCVC3_1_1Theorem.html#af2b97ae5d270ddf1013bf4f3867a7e5d">getExpr</a>(), <span class="stringliteral">")"</span>);</div>
<div class="line"><a name="l01170"></a><span class="lineno"> 1170</span>  gamma.push_back(thm);</div>
<div class="line"><a name="l01171"></a><span class="lineno"> 1171</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l01172"></a><span class="lineno"> 1172</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"impl graph"</span>, <span class="stringliteral">"already in gamma: "</span>, thm.<a class="code" href="classCVC3_1_1Theorem.html#af2b97ae5d270ddf1013bf4f3867a7e5d">getExpr</a>(), <span class="stringliteral">""</span>);</div>
<div class="line"><a name="l01173"></a><span class="lineno"> 1173</span>  }</div>
<div class="line"><a name="l01174"></a><span class="lineno"> 1174</span>  }</div>
<div class="line"><a name="l01175"></a><span class="lineno"> 1175</span>  }</div>
<div class="line"><a name="l01176"></a><span class="lineno"> 1176</span>  <span class="comment">// FIXME: uniquify theorems in lits, gamma, and fringe by</span></div>
<div class="line"><a name="l01177"></a><span class="lineno"> 1177</span>  <span class="comment">// expression; the smallest scope theorem should supersede all the</span></div>
<div class="line"><a name="l01178"></a><span class="lineno"> 1178</span>  <span class="comment">// duplicates. Question: can we do it safely, without breaking the</span></div>
<div class="line"><a name="l01179"></a><span class="lineno"> 1179</span>  <span class="comment">// UIP algorithm?</span></div>
<div class="line"><a name="l01180"></a><span class="lineno"> 1180</span> }</div>
<div class="line"><a name="l01181"></a><span class="lineno"> 1181</span> <span class="comment"></span></div>
<div class="line"><a name="l01182"></a><span class="lineno"> 1182</span> <span class="comment">/*! </span></div>
<div class="line"><a name="l01183"></a><span class="lineno"> 1183</span> <span class="comment"> <strong>Finding UIPs (Unique Implication Pointers)</strong></span></div>
<div class="line"><a name="l01184"></a><span class="lineno"> 1184</span> <span class="comment"></span></div>
<div class="line"><a name="l01185"></a><span class="lineno"> 1185</span> <span class="comment"> This is basically the same as finding hammocks of the subset of the</span></div>
<div class="line"><a name="l01186"></a><span class="lineno"> 1186</span> <span class="comment"> implication graph composed of only the nodes from the current scope.</span></div>
<div class="line"><a name="l01187"></a><span class="lineno"> 1187</span> <span class="comment"> A hammock is a portion of the graph which has a single source and/or</span></div>
<div class="line"><a name="l01188"></a><span class="lineno"> 1188</span> <span class="comment"> sink such that removing that single node makes the graph</span></div>
<div class="line"><a name="l01189"></a><span class="lineno"> 1189</span> <span class="comment"> disconnected.</span></div>
<div class="line"><a name="l01190"></a><span class="lineno"> 1190</span> <span class="comment"></span></div>
<div class="line"><a name="l01191"></a><span class="lineno"> 1191</span> <span class="comment"> Conceptually, the algorithm maintains four sets of nodes: literals</span></div>
<div class="line"><a name="l01192"></a><span class="lineno"> 1192</span> <span class="comment"> (named <em>lits</em>), gamma, fringe, and pending. Literals are</span></div>
<div class="line"><a name="l01193"></a><span class="lineno"> 1193</span> <span class="comment"> nodes whose expressions will become literals in the conflict clause</span></div>
<div class="line"><a name="l01194"></a><span class="lineno"> 1194</span> <span class="comment"> of the current hammock, and the nodes in gamma are assumptions from</span></div>
<div class="line"><a name="l01195"></a><span class="lineno"> 1195</span> <span class="comment"> which such conflict clause theorem is derived. Nodes in fringe are</span></div>
<div class="line"><a name="l01196"></a><span class="lineno"> 1196</span> <span class="comment"> intermediate nodes which are ready to be "expanded" (see the</span></div>
<div class="line"><a name="l01197"></a><span class="lineno"> 1197</span> <span class="comment"> algorithm description below). The pending nodes are those which are</span></div>
<div class="line"><a name="l01198"></a><span class="lineno"> 1198</span> <span class="comment"> not yet ready to be processed (they later become literal or fringe</span></div>
<div class="line"><a name="l01199"></a><span class="lineno"> 1199</span> <span class="comment"> nodes).</span></div>
<div class="line"><a name="l01200"></a><span class="lineno"> 1200</span> <span class="comment"></span></div>
<div class="line"><a name="l01201"></a><span class="lineno"> 1201</span> <span class="comment"> These sets are maintained as vectors, and are updated in such a way</span></div>
<div class="line"><a name="l01202"></a><span class="lineno"> 1202</span> <span class="comment"> that the nodes in the vectors never repeat. The exception is the</span></div>
<div class="line"><a name="l01203"></a><span class="lineno"> 1203</span> <span class="comment"> pending set, for which only a size counter is maintained. A node</span></div>
<div class="line"><a name="l01204"></a><span class="lineno"> 1204</span> <span class="comment"> belongs to the pending set if it has been visited (isFlagged()</span></div>
<div class="line"><a name="l01205"></a><span class="lineno"> 1205</span> <span class="comment"> method), and its fan-out count is non-zero (stored in the cache,</span></div>
<div class="line"><a name="l01206"></a><span class="lineno"> 1206</span> <span class="comment"> getCachedValue()). In other words, pending nodes are those that have</span></div>
<div class="line"><a name="l01207"></a><span class="lineno"> 1207</span> <span class="comment"> been visited, but not sufficient number of times.</span></div>
<div class="line"><a name="l01208"></a><span class="lineno"> 1208</span> <span class="comment"></span></div>
<div class="line"><a name="l01209"></a><span class="lineno"> 1209</span> <span class="comment"> Also, fringe is maintained as a pair of vectors. One vector is</span></div>
<div class="line"><a name="l01210"></a><span class="lineno"> 1210</span> <span class="comment"> always the current fringe, and the other one is built when the</span></div>
<div class="line"><a name="l01211"></a><span class="lineno"> 1211</span> <span class="comment"> current is processed. When processing of the current fringe is</span></div>
<div class="line"><a name="l01212"></a><span class="lineno"> 1212</span> <span class="comment"> finished, it is cleared, and the other vector becomes the current</span></div>
<div class="line"><a name="l01213"></a><span class="lineno"> 1213</span> <span class="comment"> fringe (that is, they swap roles).</span></div>
<div class="line"><a name="l01214"></a><span class="lineno"> 1214</span> <span class="comment"></span></div>
<div class="line"><a name="l01215"></a><span class="lineno"> 1215</span> <span class="comment"> A node is expanded if it is marked for expansion (getExpandFlag()).</span></div>
<div class="line"><a name="l01216"></a><span class="lineno"> 1216</span> <span class="comment"> If its fan-out count is not yet zero, it is added to the set of</span></div>
<div class="line"><a name="l01217"></a><span class="lineno"> 1217</span> <span class="comment"> pending nodes.</span></div>
<div class="line"><a name="l01218"></a><span class="lineno"> 1218</span> <span class="comment"></span></div>
<div class="line"><a name="l01219"></a><span class="lineno"> 1219</span> <span class="comment"> If a node has a literal flag (getLitFlag()), it goes into literals</span></div>
<div class="line"><a name="l01220"></a><span class="lineno"> 1220</span> <span class="comment"> when its fan-out count reaches zero. Since this will be the last</span></div>
<div class="line"><a name="l01221"></a><span class="lineno"> 1221</span> <span class="comment"> time the node is visited, it is added to the vector only once.</span></div>
<div class="line"><a name="l01222"></a><span class="lineno"> 1222</span> <span class="comment"></span></div>
<div class="line"><a name="l01223"></a><span class="lineno"> 1223</span> <span class="comment"> A node neither marked for expansion nor with the literal flag goes</span></div>
<div class="line"><a name="l01224"></a><span class="lineno"> 1224</span> <span class="comment"> into the gamma set. It is added the first time the node is visited</span></div>
<div class="line"><a name="l01225"></a><span class="lineno"> 1225</span> <span class="comment"> (isFlagged() returns false), and therefore, is added to the vector</span></div>
<div class="line"><a name="l01226"></a><span class="lineno"> 1226</span> <span class="comment"> only once. This is an important distinction from the other sets,</span></div>
<div class="line"><a name="l01227"></a><span class="lineno"> 1227</span> <span class="comment"> since a gamma-node may be used by several conflict clauses.</span></div>
<div class="line"><a name="l01228"></a><span class="lineno"> 1228</span> <span class="comment"></span></div>
<div class="line"><a name="l01229"></a><span class="lineno"> 1229</span> <span class="comment"> Clearing the gamma set after each UIP requires both clearing the</span></div>
<div class="line"><a name="l01230"></a><span class="lineno"> 1230</span> <span class="comment"> vector and resetting all flags (clearAllFlags()).</span></div>
<div class="line"><a name="l01231"></a><span class="lineno"> 1231</span> <span class="comment"></span></div>
<div class="line"><a name="l01232"></a><span class="lineno"> 1232</span> <span class="comment"> <strong>The algorithm</strong></span></div>
<div class="line"><a name="l01233"></a><span class="lineno"> 1233</span> <span class="comment"></span></div>
<div class="line"><a name="l01234"></a><span class="lineno"> 1234</span> <span class="comment"><ol></span></div>
<div class="line"><a name="l01235"></a><span class="lineno"> 1235</span> <span class="comment"></span></div>
<div class="line"><a name="l01236"></a><span class="lineno"> 1236</span> <span class="comment"><li> Initially, the fringe contains exactly the predecessors of</span></div>
<div class="line"><a name="l01237"></a><span class="lineno"> 1237</span> <span class="comment"> falseThm from the current scope which are ready to be expanded</span></div>
<div class="line"><a name="l01238"></a><span class="lineno"> 1238</span> <span class="comment"> (fan-out count is zero). All the other predecessors of falseThm</span></div>
<div class="line"><a name="l01239"></a><span class="lineno"> 1239</span> <span class="comment"> go to the appropriate sets of literals, gamma, and pending.</span></div>
<div class="line"><a name="l01240"></a><span class="lineno"> 1240</span> <span class="comment"></span></div>
<div class="line"><a name="l01241"></a><span class="lineno"> 1241</span> <span class="comment"><li> If fringe.size() <= 1 and the set of pending nodes is empty, then</span></div>
<div class="line"><a name="l01242"></a><span class="lineno"> 1242</span> <span class="comment"> the element in the fringe (if it's non-empty) is a UIP. Generate</span></div>
<div class="line"><a name="l01243"></a><span class="lineno"> 1243</span> <span class="comment"> a conflict clause from the UIP and the literals (using gamma as</span></div>
<div class="line"><a name="l01244"></a><span class="lineno"> 1244</span> <span class="comment"> the set of assumptions), empty the sets, and continue with the</span></div>
<div class="line"><a name="l01245"></a><span class="lineno"> 1245</span> <span class="comment"> next step. Note, that the UIP remains in the fringe, and will be</span></div>
<div class="line"><a name="l01246"></a><span class="lineno"> 1246</span> <span class="comment"> expanded in the next step.</span></div>
<div class="line"><a name="l01247"></a><span class="lineno"> 1247</span> <span class="comment"></span></div>
<div class="line"><a name="l01248"></a><span class="lineno"> 1248</span> <span class="comment"> The important exception: if the only element in the fringe is</span></div>
<div class="line"><a name="l01249"></a><span class="lineno"> 1249</span> <span class="comment"> marked for expansion, then this is a false UIP (the SAT solver</span></div>
<div class="line"><a name="l01250"></a><span class="lineno"> 1250</span> <span class="comment"> doesn't know about this node), and it should not appear in the</span></div>
<div class="line"><a name="l01251"></a><span class="lineno"> 1251</span> <span class="comment"> conflict clause. In this case, simply proceed to step 3 as if</span></div>
<div class="line"><a name="l01252"></a><span class="lineno"> 1252</span> <span class="comment"> nothing happened.</span></div>
<div class="line"><a name="l01253"></a><span class="lineno"> 1253</span> <span class="comment"></span></div>
<div class="line"><a name="l01254"></a><span class="lineno"> 1254</span> <span class="comment"><li> If fringe.size()==0, stop (the set of pending nodes must also be</span></div>
<div class="line"><a name="l01255"></a><span class="lineno"> 1255</span> <span class="comment"> empty at this point). Otherwise, for *every* node in the fringe,</span></div>
<div class="line"><a name="l01256"></a><span class="lineno"> 1256</span> <span class="comment"> decrement the fan-out for each of its predecessors, and empty the</span></div>
<div class="line"><a name="l01257"></a><span class="lineno"> 1257</span> <span class="comment"> fringe. Take the predecessors from the current scope, and add</span></div>
<div class="line"><a name="l01258"></a><span class="lineno"> 1258</span> <span class="comment"> those to the fringe for which fan-out count is zero, and remove</span></div>
<div class="line"><a name="l01259"></a><span class="lineno"> 1259</span> <span class="comment"> them from the set of pending nodes. Add the other predecessors</span></div>
<div class="line"><a name="l01260"></a><span class="lineno"> 1260</span> <span class="comment"> from the current scope to the set of pending nodes. Add the</span></div>
<div class="line"><a name="l01261"></a><span class="lineno"> 1261</span> <span class="comment"> remaining predecessors (not from the current scope) to the</span></div>
<div class="line"><a name="l01262"></a><span class="lineno"> 1262</span> <span class="comment"> literals or gamma, as appropriate. Continue with step 2.</span></div>
<div class="line"><a name="l01263"></a><span class="lineno"> 1263</span> <span class="comment"></span></div>
<div class="line"><a name="l01264"></a><span class="lineno"> 1264</span> <span class="comment"></ol></span></div>
<div class="line"><a name="l01265"></a><span class="lineno"> 1265</span> <span class="comment">*/</span></div>
<div class="line"><a name="l01266"></a><span class="lineno"><a class="code" href="group__SE__Fast.html#gaac9cb2de28ec162fe5ecfe042ad7b101"> 1266</a></span> <span class="keywordtype">void</span> <a class="code" href="group__SE__Fast.html#gaac9cb2de28ec162fe5ecfe042ad7b101" title="Analyse the conflict, find the UIPs, etc.">SearchEngineFast::analyzeUIPs</a>(<span class="keyword">const</span> <a class="code" href="classCVC3_1_1Theorem.html">Theorem</a> &falseThm, <span class="keywordtype">int</span> conflictScope)</div>
<div class="line"><a name="l01267"></a><span class="lineno"> 1267</span> {</div>
<div class="line"><a name="l01268"></a><span class="lineno"> 1268</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"impl graph"</span>, <span class="stringliteral">"analyzeUIPs(scope = "</span>, conflictScope, <span class="stringliteral">") {"</span>);</div>
<div class="line"><a name="l01269"></a><span class="lineno"> 1269</span>  vector<Theorem> fringe[2]; <span class="comment">// 2-element array of vectors (new & curr. fringe)</span></div>
<div class="line"><a name="l01270"></a><span class="lineno"> 1270</span>  <span class="keywordtype">unsigned</span> curr(0), next(1);</div>
<div class="line"><a name="l01271"></a><span class="lineno"> 1271</span> </div>
<div class="line"><a name="l01272"></a><span class="lineno"> 1272</span>  <span class="keywordtype">int</span> pending(0);</div>
<div class="line"><a name="l01273"></a><span class="lineno"> 1273</span>  vector<Theorem> lits;</div>
<div class="line"><a name="l01274"></a><span class="lineno"> 1274</span>  vector<Theorem> gamma;</div>
<div class="line"><a name="l01275"></a><span class="lineno"> 1275</span>  </div>
<div class="line"><a name="l01276"></a><span class="lineno"> 1276</span>  <a class="code" href="classCVC3_1_1Theorem.html">Theorem</a> start = falseThm;</div>
<div class="line"><a name="l01277"></a><span class="lineno"> 1277</span>  <a class="code" href="group__SE__Fast.html#ga46e91bb5d782794c6dca6abaa99dc4f9" title="The last conflict clause (for checkSAT()). May be Null.">d_lastConflictClause</a> = <a class="code" href="classCVC3_1_1Clause.html" title="A class representing a CNF clause (a smart pointer)">Clause</a>();</div>
<div class="line"><a name="l01278"></a><span class="lineno"> 1278</span>  <a class="code" href="group__SE__Fast.html#gab27227ee9e005ab22a9e2a251bc7c6d1" title="The scope of the last conflict.">d_lastConflictScope</a> = conflictScope;</div>
<div class="line"><a name="l01279"></a><span class="lineno"> 1279</span>  start.<a class="code" href="classCVC3_1_1Theorem.html#a621ab2150eedc0e3b38d34275ac206cd" title="Clear the flag attribute in all the theorems.">clearAllFlags</a>();</div>
<div class="line"><a name="l01280"></a><span class="lineno"> 1280</span> </div>
<div class="line"><a name="l01281"></a><span class="lineno"> 1281</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"search full"</span>, <span class="stringliteral">"Analysing UIPs at level: "</span>, conflictScope, <span class="stringliteral">""</span>);</div>
<div class="line"><a name="l01282"></a><span class="lineno"> 1282</span> </div>
<div class="line"><a name="l01283"></a><span class="lineno"> 1283</span>  <span class="comment">// Initialize all the sets</span></div>
<div class="line"><a name="l01284"></a><span class="lineno"> 1284</span>  <span class="keyword">const</span> <a class="code" href="classCVC3_1_1Assumptions.html">Assumptions</a>& a=start.<a class="code" href="classCVC3_1_1Theorem.html#a5e9ab00a613df15cc02f55edb55a67b3">getAssumptionsRef</a>();</div>
<div class="line"><a name="l01285"></a><span class="lineno"> 1285</span>  <span class="keywordflow">for</span>(<a class="code" href="classCVC3_1_1Assumptions_1_1iterator.html" title="Iterator for the Assumptions: points to class Theorem.">Assumptions::iterator</a> i=a.<a class="code" href="classCVC3_1_1Assumptions.html#ac3e7d0e1796c83edf687aac063bdba06">begin</a>(), iend=a.<a class="code" href="classCVC3_1_1Assumptions.html#afc875bbe97e4e2d74a2cdc824f783bfb">end</a>(); i!=iend; ++i) {</div>
<div class="line"><a name="l01286"></a><span class="lineno"> 1286</span>  <a class="code" href="search__fast_8cpp.html#a0ffbe582e8cf359e6b82a5bfc8c028ed" title="Auxiliary function used in analyzeUIPs()">processNode</a>(*i, lits, gamma, fringe[curr], pending);</div>
<div class="line"><a name="l01287"></a><span class="lineno"> 1287</span>  }</div>
<div class="line"><a name="l01288"></a><span class="lineno"> 1288</span> </div>
<div class="line"><a name="l01289"></a><span class="lineno"> 1289</span>  <span class="keywordflow">while</span> (<span class="keyword">true</span>) {</div>
<div class="line"><a name="l01290"></a><span class="lineno"> 1290</span>  <a class="code" href="debug_8h.html#ad64155edafde9f067f4868817cd04bdf">TRACE_MSG</a>(<span class="stringliteral">"impl graph"</span>, <span class="stringliteral">"analyzeUIPs(): fringe size = "</span></div>
<div class="line"><a name="l01291"></a><span class="lineno"> 1291</span>  +<a class="code" href="namespaceCVC3.html#af69618103f1f0f2eadada0796a2a940c">int2string</a>(fringe[curr].size())</div>
<div class="line"><a name="l01292"></a><span class="lineno"> 1292</span>  +<span class="stringliteral">", pending size = "</span>+<a class="code" href="namespaceCVC3.html#af69618103f1f0f2eadada0796a2a940c">int2string</a>(pending));</div>
<div class="line"><a name="l01293"></a><span class="lineno"> 1293</span>  <span class="comment">// Wrap up a conflict clause if:</span></div>
<div class="line"><a name="l01294"></a><span class="lineno"> 1294</span>  <span class="comment">// (1) There are no pending nodes</span></div>
<div class="line"><a name="l01295"></a><span class="lineno"> 1295</span>  <span class="comment">// (2) The fringe has at most one element</span></div>
<div class="line"><a name="l01296"></a><span class="lineno"> 1296</span>  <span class="comment">// (3) If fringe is not empty, its node should not be flagged for expansion</span></div>
<div class="line"><a name="l01297"></a><span class="lineno"> 1297</span>  <span class="keywordflow">if</span>(fringe[curr].size() <= 1 && pending == 0</div>
<div class="line"><a name="l01298"></a><span class="lineno"> 1298</span>  && (fringe[curr].size() == 0</div>
<div class="line"><a name="l01299"></a><span class="lineno"> 1299</span>  || !fringe[curr].back().getExpandFlag())) {</div>
<div class="line"><a name="l01300"></a><span class="lineno"> 1300</span>  <span class="comment">// Found UIP or end of graph. Generate conflict clause.</span></div>
<div class="line"><a name="l01301"></a><span class="lineno"> 1301</span>  <span class="keywordflow">if</span>(fringe[curr].size() > 0)</div>
<div class="line"><a name="l01302"></a><span class="lineno"> 1302</span>  lits.push_back(fringe[curr].back());</div>
<div class="line"><a name="l01303"></a><span class="lineno"> 1303</span>  <a class="code" href="debug_8h.html#a600cb2d68efe7cc413cccbb5714c7016">IF_DEBUG</a>(<span class="keywordflow">if</span>(debugger.trace(<span class="stringliteral">"impl graph"</span>)) {</div>
<div class="line"><a name="l01304"></a><span class="lineno"> 1304</span>  ostream& os = debugger.getOS();</div>
<div class="line"><a name="l01305"></a><span class="lineno"> 1305</span>  os << <span class="stringliteral">"Creating conflict clause:"</span></div>
<div class="line"><a name="l01306"></a><span class="lineno"> 1306</span>  << <span class="stringliteral">"\n start: "</span> << start.<a class="code" href="classCVC3_1_1Theorem.html#af2b97ae5d270ddf1013bf4f3867a7e5d">getExpr</a>()</div>
<div class="line"><a name="l01307"></a><span class="lineno"> 1307</span>  << <span class="stringliteral">"\n Lits: [\n"</span>;</div>
<div class="line"><a name="l01308"></a><span class="lineno"> 1308</span>  <span class="keywordflow">for</span>(<span class="keywordtype">size_t</span> i=0; i<lits.size(); i++)</div>
<div class="line"><a name="l01309"></a><span class="lineno"> 1309</span>  os << <span class="stringliteral">" "</span> << lits[i].getExpr() << <span class="stringliteral">"\n"</span>;</div>
<div class="line"><a name="l01310"></a><span class="lineno"> 1310</span>  os << <span class="stringliteral">"]\n Gamma: [\n"</span>;</div>
<div class="line"><a name="l01311"></a><span class="lineno"> 1311</span>  <span class="keywordflow">for</span>(<span class="keywordtype">size_t</span> i=0; i<gamma.size(); i++)</div>
<div class="line"><a name="l01312"></a><span class="lineno"> 1312</span>  os << <span class="stringliteral">" "</span> << gamma[i].getExpr() << <span class="stringliteral">"\n"</span>;</div>
<div class="line"><a name="l01313"></a><span class="lineno"> 1313</span>  os << <span class="stringliteral">"]"</span> << <a class="code" href="group__ExprStream__Manip.html#ga05b0ea7353ec24fa8e7e272d7a7875d8" title="Print the end-of-line.">endl</a>;</div>
<div class="line"><a name="l01314"></a><span class="lineno"> 1314</span>  })</div>
<div class="line"><a name="l01315"></a><span class="lineno"> 1315</span>  <span class="comment">// Derive a theorem for the conflict clause</span></div>
<div class="line"><a name="l01316"></a><span class="lineno"> 1316</span>  <a class="code" href="classCVC3_1_1Theorem.html">Theorem</a> clause = <a class="code" href="group__SE.html#ga879b68112123e2b4ae7175d85a03bfec" title="Proof rules for the search engine.">d_rules</a>-><a class="code" href="group__SE__Rules.html#ga03be39f8ffe84a1bcc09bba60f45245c" title="Conflict clause rule: .">conflictClause</a>(start, lits, gamma);</div>
<div class="line"><a name="l01317"></a><span class="lineno"> 1317</span>  <a class="code" href="group__SE__Fast.html#ga483cb3c4c889013b03e2c923977d4ae5" title="Total number of conflict clauses generated (not all may be active)">d_conflictClauseCount</a>++;</div>
<div class="line"><a name="l01318"></a><span class="lineno"> 1318</span>  <span class="comment">// Generate the actual clause and set it up</span></div>
<div class="line"><a name="l01319"></a><span class="lineno"> 1319</span>  <a class="code" href="classCVC3_1_1Clause.html" title="A class representing a CNF clause (a smart pointer)">Clause</a> c(<a class="code" href="group__SE.html#ga3772c6af7eac91b9ed7fc278edf5ef90" title="Access to theory reasoning.">d_core</a>, <a class="code" href="group__SE.html#ga626a0fe24f363d007d729e16d13349e5" title="Variable manager for classes Variable and Literal.">d_vm</a>, clause, <a class="code" href="group__SE.html#ga640e08e2b051e08f2abdd4111b9a2e71" title="The bottom-most scope for the current call to checkSAT (where conflict clauses are still valid)...">d_bottomScope</a>, __FILE__, __LINE__);</div>
<div class="line"><a name="l01320"></a><span class="lineno"> 1320</span>  <a class="code" href="group__SE__Fast.html#ga775b06e155128cc8817f254bc293c6c6" title="Add the literals of a new clause to d_litsByScores.">updateLitCounts</a>(c);</div>
<div class="line"><a name="l01321"></a><span class="lineno"> 1321</span>  <span class="keywordflow">if</span> (c.<a class="code" href="classCVC3_1_1Clause.html#a7cfde40c65fc8eb4f733094fad07dfa1">size</a>() > 1) {</div>
<div class="line"><a name="l01322"></a><span class="lineno"> 1322</span>  <span class="comment">// Set the watched pointers to the two literals with the</span></div>
<div class="line"><a name="l01323"></a><span class="lineno"> 1323</span>  <span class="comment">// highest scopes</span></div>
<div class="line"><a name="l01324"></a><span class="lineno"> 1324</span>  <span class="keywordtype">int</span> firstLit = 0;</div>
<div class="line"><a name="l01325"></a><span class="lineno"> 1325</span>  <span class="keywordtype">int</span> secondLit = 1;</div>
<div class="line"><a name="l01326"></a><span class="lineno"> 1326</span>  <span class="keywordtype">int</span> firstDL = c[0].<a class="code" href="classCVC3_1_1Clause.html#af505679fdb9d5b220115747cb4548612">getScope</a>();</div>
<div class="line"><a name="l01327"></a><span class="lineno"> 1327</span>  <span class="keywordtype">int</span> secondDL = c[1].<a class="code" href="classCVC3_1_1Clause.html#af505679fdb9d5b220115747cb4548612">getScope</a>();</div>
<div class="line"><a name="l01328"></a><span class="lineno"> 1328</span>  <span class="comment">// Invariant: firstDL >= secondDL</span></div>
<div class="line"><a name="l01329"></a><span class="lineno"> 1329</span>  <span class="keywordflow">if</span>(firstDL < secondDL) {</div>
<div class="line"><a name="l01330"></a><span class="lineno"> 1330</span>  firstLit=1; secondLit=0;</div>
<div class="line"><a name="l01331"></a><span class="lineno"> 1331</span>  <span class="keywordtype">int</span> tmp(secondDL);</div>
<div class="line"><a name="l01332"></a><span class="lineno"> 1332</span>  secondDL=firstDL; firstDL=tmp;</div>
<div class="line"><a name="l01333"></a><span class="lineno"> 1333</span>  }</div>
<div class="line"><a name="l01334"></a><span class="lineno"> 1334</span>  <span class="keywordflow">for</span>(<span class="keywordtype">unsigned</span> i = 2; i < c.<a class="code" href="classCVC3_1_1Clause.html#a7cfde40c65fc8eb4f733094fad07dfa1">size</a>(); ++i) {</div>
<div class="line"><a name="l01335"></a><span class="lineno"> 1335</span>  <span class="keywordtype">int</span> cur = c[i].<a class="code" href="classCVC3_1_1Clause.html#af505679fdb9d5b220115747cb4548612">getScope</a>();</div>
<div class="line"><a name="l01336"></a><span class="lineno"> 1336</span>  <span class="keywordflow">if</span>(cur >= firstDL) {</div>
<div class="line"><a name="l01337"></a><span class="lineno"> 1337</span>  secondLit=firstLit; secondDL=firstDL;</div>
<div class="line"><a name="l01338"></a><span class="lineno"> 1338</span>  firstLit=i; firstDL=cur;</div>
<div class="line"><a name="l01339"></a><span class="lineno"> 1339</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(cur > secondDL) {</div>
<div class="line"><a name="l01340"></a><span class="lineno"> 1340</span>  secondLit=i; secondDL=cur;</div>
<div class="line"><a name="l01341"></a><span class="lineno"> 1341</span>  }</div>
<div class="line"><a name="l01342"></a><span class="lineno"> 1342</span>  }</div>
<div class="line"><a name="l01343"></a><span class="lineno"> 1343</span> </div>
<div class="line"><a name="l01344"></a><span class="lineno"> 1344</span>  c.<a class="code" href="classCVC3_1_1Clause.html#ad399ff73eb62edf9cc4d1135e91afdcb">wp</a>(0, firstLit);</div>
<div class="line"><a name="l01345"></a><span class="lineno"> 1345</span>  c.<a class="code" href="classCVC3_1_1Clause.html#ad399ff73eb62edf9cc4d1135e91afdcb">wp</a>(1, secondLit);</div>
<div class="line"><a name="l01346"></a><span class="lineno"> 1346</span>  </div>
<div class="line"><a name="l01347"></a><span class="lineno"> 1347</span>  <span class="comment">// Add the watch pointers to the d_wp lists</span></div>
<div class="line"><a name="l01348"></a><span class="lineno"> 1348</span>  <span class="keywordflow">for</span>(<span class="keywordtype">int</span> i=0; i<=1; i++) {</div>
<div class="line"><a name="l01349"></a><span class="lineno"> 1349</span>  <span class="comment">// Negated watched literal</span></div>
<div class="line"><a name="l01350"></a><span class="lineno"> 1350</span>  <a class="code" href="classCVC3_1_1Literal.html">Literal</a> l(!c.<a class="code" href="classCVC3_1_1Clause.html#a4a2b1e46395f03fe87a6a5b7558292f0">watched</a>(i));</div>
<div class="line"><a name="l01351"></a><span class="lineno"> 1351</span>  <span class="comment">// Add the pointer to l's list</span></div>
<div class="line"><a name="l01352"></a><span class="lineno"> 1352</span>  pair<Clause, int> p(c, i);</div>
<div class="line"><a name="l01353"></a><span class="lineno"> 1353</span>  <a class="code" href="group__SE__Fast.html#ga8f4353c8f8c65ed00806861471bd857f" title="Return a ref to the vector of watched literals. If no such vector exists, create it.">wp</a>(l).push_back(p);</div>
<div class="line"><a name="l01354"></a><span class="lineno"> 1354</span>  }</div>
<div class="line"><a name="l01355"></a><span class="lineno"> 1355</span>  }</div>
<div class="line"><a name="l01356"></a><span class="lineno"> 1356</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"conflict clauses"</span>,</div>
<div class="line"><a name="l01357"></a><span class="lineno"> 1357</span>  <span class="stringliteral">"Conflict clause #"</span>+<a class="code" href="namespaceCVC3.html#af69618103f1f0f2eadada0796a2a940c">int2string</a>(<a class="code" href="group__SE__Fast.html#ga483cb3c4c889013b03e2c923977d4ae5" title="Total number of conflict clauses generated (not all may be active)">d_conflictClauseCount</a>)</div>
<div class="line"><a name="l01358"></a><span class="lineno"> 1358</span>  +<span class="stringliteral">": "</span>, <a class="code" href="classCVC3_1_1CompactClause.html">CompactClause</a>(c), <span class="stringliteral">""</span>);</div>
<div class="line"><a name="l01359"></a><span class="lineno"> 1359</span>  <span class="keywordflow">if</span>(c.<a class="code" href="classCVC3_1_1Clause.html#a7cfde40c65fc8eb4f733094fad07dfa1">size</a>() == 1) {</div>
<div class="line"><a name="l01360"></a><span class="lineno"> 1360</span>  <span class="comment">// Unit clause: stash it for later unit propagation</span></div>
<div class="line"><a name="l01361"></a><span class="lineno"> 1361</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"conflict clauses"</span>, <span class="stringliteral">"analyzeUIPs(): unit clause: "</span>,</div>
<div class="line"><a name="l01362"></a><span class="lineno"> 1362</span>  <a class="code" href="classCVC3_1_1CompactClause.html">CompactClause</a>(c), <span class="stringliteral">""</span>);</div>
<div class="line"><a name="l01363"></a><span class="lineno"> 1363</span>  <a class="code" href="group__SE__Fast.html#gad05f577d00e93fefed74eb0c19015090" title="Unprocessed unit conflict clauses.">d_unitConflictClauses</a>.push_back(c);</div>
<div class="line"><a name="l01364"></a><span class="lineno"> 1364</span>  }</div>
<div class="line"><a name="l01365"></a><span class="lineno"> 1365</span>  <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l01366"></a><span class="lineno"> 1366</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"conflict clauses"</span>, <span class="stringliteral">"analyzeUIPs(): conflict clause "</span>,</div>
<div class="line"><a name="l01367"></a><span class="lineno"> 1367</span>  <a class="code" href="classCVC3_1_1CompactClause.html">CompactClause</a>(c), <span class="stringliteral">""</span>);</div>
<div class="line"><a name="l01368"></a><span class="lineno"> 1368</span>  <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(c.<a class="code" href="classCVC3_1_1Clause.html#af505679fdb9d5b220115747cb4548612">getScope</a>() <= <a class="code" href="group__SE.html#ga640e08e2b051e08f2abdd4111b9a2e71" title="The bottom-most scope for the current call to checkSAT (where conflict clauses are still valid)...">d_bottomScope</a>,</div>
<div class="line"><a name="l01369"></a><span class="lineno"> 1369</span>  <span class="stringliteral">"Conflict clause should be at bottom scope."</span>);</div>
<div class="line"><a name="l01370"></a><span class="lineno"> 1370</span>  <a class="code" href="group__SE__Fast.html#gad79601e3b2032aee4d23dc4bbd785fc3" title="Reference to top deque of conflict clauses.">d_conflictClauses</a>->push_back(c);</div>
<div class="line"><a name="l01371"></a><span class="lineno"> 1371</span>  <span class="keywordflow">if</span> (<a class="code" href="group__SE__Fast.html#ga46e91bb5d782794c6dca6abaa99dc4f9" title="The last conflict clause (for checkSAT()). May be Null.">d_lastConflictClause</a>.<a class="code" href="classCVC3_1_1Clause.html#a60c298aa79d5cec791f8eeef2086e92f">isNull</a>()) {</div>
<div class="line"><a name="l01372"></a><span class="lineno"> 1372</span>  <a class="code" href="group__SE__Fast.html#ga46e91bb5d782794c6dca6abaa99dc4f9" title="The last conflict clause (for checkSAT()). May be Null.">d_lastConflictClause</a> = c;</div>
<div class="line"><a name="l01373"></a><span class="lineno"> 1373</span> <span class="comment">// IF_DEBUG(for(unsigned i=0; i<c.size(); ++i)</span></div>
<div class="line"><a name="l01374"></a><span class="lineno"> 1374</span> <span class="comment">// DebugAssert(c[i].getValue() == -1, "Bad conflict clause: "</span></div>
<div class="line"><a name="l01375"></a><span class="lineno"> 1375</span> <span class="comment">// +c.toString());)</span></div>
<div class="line"><a name="l01376"></a><span class="lineno"> 1376</span>  }</div>
<div class="line"><a name="l01377"></a><span class="lineno"> 1377</span>  }</div>
<div class="line"><a name="l01378"></a><span class="lineno"> 1378</span>  <span class="keywordflow">if</span>(fringe[curr].size() > 0) {</div>
<div class="line"><a name="l01379"></a><span class="lineno"> 1379</span>  <span class="comment">// This was a UIP. Leave it in the fringe for later expansion.</span></div>
<div class="line"><a name="l01380"></a><span class="lineno"> 1380</span>  <a class="code" href="debug_8h.html#a600cb2d68efe7cc413cccbb5714c7016">IF_DEBUG</a>(debugger.counter(<span class="stringliteral">"UIPs"</span>)++;)</div>
<div class="line"><a name="l01381"></a><span class="lineno"> 1381</span>  start = fringe[curr].back();</div>
<div class="line"><a name="l01382"></a><span class="lineno"> 1382</span>  lits.clear();</div>
<div class="line"><a name="l01383"></a><span class="lineno"> 1383</span>  gamma.clear();</div>
<div class="line"><a name="l01384"></a><span class="lineno"> 1384</span>  start.<a class="code" href="classCVC3_1_1Theorem.html#a621ab2150eedc0e3b38d34275ac206cd" title="Clear the flag attribute in all the theorems.">clearAllFlags</a>();</div>
<div class="line"><a name="l01385"></a><span class="lineno"> 1385</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l01386"></a><span class="lineno"> 1386</span>  <span class="comment">// No more conflict clauses, we are done. This is the only</span></div>
<div class="line"><a name="l01387"></a><span class="lineno"> 1387</span>  <span class="comment">// way this function can return.</span></div>
<div class="line"><a name="l01388"></a><span class="lineno"> 1388</span>  <a class="code" href="debug_8h.html#ad64155edafde9f067f4868817cd04bdf">TRACE_MSG</a>(<span class="stringliteral">"impl graph"</span>, <span class="stringliteral">"analyzeUIPs => }"</span>);</div>
<div class="line"><a name="l01389"></a><span class="lineno"> 1389</span>  <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l01390"></a><span class="lineno"> 1390</span>  }</div>
<div class="line"><a name="l01391"></a><span class="lineno"> 1391</span>  }</div>
<div class="line"><a name="l01392"></a><span class="lineno"> 1392</span>  <span class="comment">// Now expand all the nodes in the fringe</span></div>
<div class="line"><a name="l01393"></a><span class="lineno"> 1393</span>  <span class="keywordflow">for</span>(vector<Theorem>::iterator i=fringe[curr].begin(),</div>
<div class="line"><a name="l01394"></a><span class="lineno"> 1394</span>  iend=fringe[curr].end();</div>
<div class="line"><a name="l01395"></a><span class="lineno"> 1395</span>  i!=iend; ++i) {</div>
<div class="line"><a name="l01396"></a><span class="lineno"> 1396</span>  <span class="keyword">const</span> <a class="code" href="classCVC3_1_1Assumptions.html">Assumptions</a>& a=i->getAssumptionsRef();</div>
<div class="line"><a name="l01397"></a><span class="lineno"> 1397</span>  <span class="keywordflow">for</span>(<a class="code" href="classCVC3_1_1Assumptions_1_1iterator.html" title="Iterator for the Assumptions: points to class Theorem.">Assumptions::iterator</a> j=a.<a class="code" href="classCVC3_1_1Assumptions.html#ac3e7d0e1796c83edf687aac063bdba06">begin</a>(), jend=a.<a class="code" href="classCVC3_1_1Assumptions.html#afc875bbe97e4e2d74a2cdc824f783bfb">end</a>(); j!=jend; ++j) {</div>
<div class="line"><a name="l01398"></a><span class="lineno"> 1398</span>  <a class="code" href="search__fast_8cpp.html#a0ffbe582e8cf359e6b82a5bfc8c028ed" title="Auxiliary function used in analyzeUIPs()">processNode</a>(*j, lits, gamma, fringe[next], pending);</div>
<div class="line"><a name="l01399"></a><span class="lineno"> 1399</span>  }</div>
<div class="line"><a name="l01400"></a><span class="lineno"> 1400</span>  }</div>
<div class="line"><a name="l01401"></a><span class="lineno"> 1401</span>  <span class="comment">// Swap the current and next fringes</span></div>
<div class="line"><a name="l01402"></a><span class="lineno"> 1402</span>  fringe[curr].clear();</div>
<div class="line"><a name="l01403"></a><span class="lineno"> 1403</span>  curr = 1 - curr;</div>
<div class="line"><a name="l01404"></a><span class="lineno"> 1404</span>  next = 1 - next;</div>
<div class="line"><a name="l01405"></a><span class="lineno"> 1405</span>  <a class="code" href="debug_8h.html#a600cb2d68efe7cc413cccbb5714c7016">IF_DEBUG</a>(<span class="keywordflow">if</span>(pending > 0 && fringe[curr].size()==0)</div>
<div class="line"><a name="l01406"></a><span class="lineno"> 1406</span>  falseThm.<a class="code" href="classCVC3_1_1Theorem.html#ad9da69b34ab2bab4192e5977e5c10498">printDebug</a>();)</div>
<div class="line"><a name="l01407"></a><span class="lineno"> 1407</span>  <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(pending == 0 || fringe[curr].size() > 0,</div>
<div class="line"><a name="l01408"></a><span class="lineno"> 1408</span>  <span class="stringliteral">"analyzeUIPs(scope = "</span></div>
<div class="line"><a name="l01409"></a><span class="lineno"> 1409</span>  +<a class="code" href="namespaceCVC3.html#af69618103f1f0f2eadada0796a2a940c">int2string</a>(conflictScope)+<span class="stringliteral">"): empty fringe"</span>);</div>
<div class="line"><a name="l01410"></a><span class="lineno"> 1410</span>  }</div>
<div class="line"><a name="l01411"></a><span class="lineno"> 1411</span> }</div>
<div class="line"><a name="l01412"></a><span class="lineno"> 1412</span> </div>
<div class="line"><a name="l01413"></a><span class="lineno"> 1413</span> <span class="comment"></span></div>
<div class="line"><a name="l01414"></a><span class="lineno"> 1414</span> <span class="comment">////////////////////////////////</span></div>
<div class="line"><a name="l01415"></a><span class="lineno"> 1415</span> <span class="comment"></span><span class="comment">// End New Search Engine Code //</span><span class="comment"></span></div>
<div class="line"><a name="l01416"></a><span class="lineno"> 1416</span> <span class="comment">////////////////////////////////</span></div>
<div class="line"><a name="l01417"></a><span class="lineno"> 1417</span> <span class="comment"></span></div>
<div class="line"><a name="l01418"></a><span class="lineno"> 1418</span> <span class="comment"></span></div>
<div class="line"><a name="l01419"></a><span class="lineno"> 1419</span> <span class="comment">//! Redefine the counterexample generation.</span></div>
<div class="line"><a name="l01420"></a><span class="lineno"> 1420</span> <span class="comment"></span><span class="comment">/*! FIXME: for now, it just dumps all the assumptions (same as</span></div>
<div class="line"><a name="l01421"></a><span class="lineno"> 1421</span> <span class="comment"> * getAssumptions()). Eventually, it will simplify the related</span></div>
<div class="line"><a name="l01422"></a><span class="lineno"> 1422</span> <span class="comment"> * formulas to TRUE, merge all the generated assumptions into</span></div>
<div class="line"><a name="l01423"></a><span class="lineno"> 1423</span> <span class="comment"> * d_lastCounterExample, and call the parent's method. */</span></div>
<div class="line"><a name="l01424"></a><span class="lineno"><a class="code" href="group__SE__Fast.html#ga104e5e0abacb4c9492b0cb818b7d968a"> 1424</a></span> <span class="keywordtype">void</span> <a class="code" href="group__SE__Fast.html#ga104e5e0abacb4c9492b0cb818b7d968a" title="Redefine the counterexample generation.">SearchEngineFast::getCounterExample</a>(std::vector<Expr>& assertions) {</div>
<div class="line"><a name="l01425"></a><span class="lineno"> 1425</span>  <span class="comment">// This will not add anything, since the counterexample is empty,</span></div>
<div class="line"><a name="l01426"></a><span class="lineno"> 1426</span>  <span class="comment">// but will check if we are allowed to be called</span></div>
<div class="line"><a name="l01427"></a><span class="lineno"> 1427</span>  <a class="code" href="group__SE.html#gacf93ae1a488573c6d34dee7721007351" title="Will return the set of assertions which make the queried formula false.">SearchImplBase::getCounterExample</a>(assertions);</div>
<div class="line"><a name="l01428"></a><span class="lineno"> 1428</span>  <a class="code" href="group__SE.html#gadadf46fa5200744c9f30ca548080d35d" title="Get all assumptions made in this and all previous contexts.">getAssumptions</a>(assertions);</div>
<div class="line"><a name="l01429"></a><span class="lineno"> 1429</span> }</div>
<div class="line"><a name="l01430"></a><span class="lineno"> 1430</span> </div>
<div class="line"><a name="l01431"></a><span class="lineno"> 1431</span> <span class="comment"></span></div>
<div class="line"><a name="l01432"></a><span class="lineno"> 1432</span> <span class="comment">//! Notify the search engine about a new non-literal fact.</span></div>
<div class="line"><a name="l01433"></a><span class="lineno"> 1433</span> <span class="comment"></span><span class="comment">/*! It should be called by TheoryCore::assertFactCore().</span></div>
<div class="line"><a name="l01434"></a><span class="lineno"> 1434</span> <span class="comment"> *</span></div>
<div class="line"><a name="l01435"></a><span class="lineno"> 1435</span> <span class="comment"> * If the fact is an AND, we split it into individual conjuncts and</span></div>
<div class="line"><a name="l01436"></a><span class="lineno"> 1436</span> <span class="comment"> * add them individually.</span></div>
<div class="line"><a name="l01437"></a><span class="lineno"> 1437</span> <span class="comment"> *</span></div>
<div class="line"><a name="l01438"></a><span class="lineno"> 1438</span> <span class="comment"> * If the fact is an OR, we check whether it's a CNF clause; that is,</span></div>
<div class="line"><a name="l01439"></a><span class="lineno"> 1439</span> <span class="comment"> * whether all disjuncts are literals. If they are, we add it as a</span></div>
<div class="line"><a name="l01440"></a><span class="lineno"> 1440</span> <span class="comment"> * CNF clause.</span></div>
<div class="line"><a name="l01441"></a><span class="lineno"> 1441</span> <span class="comment"> *</span></div>
<div class="line"><a name="l01442"></a><span class="lineno"> 1442</span> <span class="comment"> * Otherwise add the fact to d_nonLiterals as it is.</span></div>
<div class="line"><a name="l01443"></a><span class="lineno"> 1443</span> <span class="comment"> */</span></div>
<div class="line"><a name="l01444"></a><span class="lineno"> 1444</span> <span class="keywordtype">void</span></div>
<div class="line"><a name="l01445"></a><span class="lineno"><a class="code" href="group__SE__Fast.html#ga03501a968c3c7122a999b1f57d6640a0"> 1445</a></span> <a class="code" href="group__SE__Fast.html#ga03501a968c3c7122a999b1f57d6640a0" title="Notify the search engine about a new non-literal fact.">SearchEngineFast::addNonLiteralFact</a>(<span class="keyword">const</span> <a class="code" href="classCVC3_1_1Theorem.html">Theorem</a>& thm) {</div>
<div class="line"><a name="l01446"></a><span class="lineno"> 1446</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"search"</span>, <span class="stringliteral">"addNonLiteralFact("</span>, thm, <span class="stringliteral">") {"</span>);</div>
<div class="line"><a name="l01447"></a><span class="lineno"> 1447</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"search"</span>, <span class="stringliteral">"d_nonLiteralsSaved.size()="</span>,<a class="code" href="group__SE__Fast.html#gae88240871407db238ad8c6a795ba6b91" title="prevent reprocessing">d_nonLiteralsSaved</a>.<a class="code" href="classCVC3_1_1CDMap.html#a2cf256af978e1a3bf82407a13ba85c13">size</a>(),</div>
<div class="line"><a name="l01448"></a><span class="lineno"> 1448</span>  <span class="stringliteral">"@"</span>+<a class="code" href="namespaceCVC3.html#af69618103f1f0f2eadada0796a2a940c">int2string</a>(<a class="code" href="group__SE.html#gab267d9f29c30c8e26b5c7bcc4d15306a" title="Return the current scope level (for convenience)">scopeLevel</a>()));</div>
<div class="line"><a name="l01449"></a><span class="lineno"> 1449</span>  <span class="comment">//IF_DEBUG(checkAssumpDebug(thm, d_assumptions);)</span></div>
<div class="line"><a name="l01450"></a><span class="lineno"> 1450</span>  <span class="keyword">const</span> <a class="code" href="classCVC3_1_1Expr.html" title="Data structure of expressions in CVC3.">Expr</a>& e(thm.<a class="code" href="classCVC3_1_1Theorem.html#af2b97ae5d270ddf1013bf4f3867a7e5d">getExpr</a>());</div>
<div class="line"><a name="l01451"></a><span class="lineno"> 1451</span>  <span class="keywordflow">if</span>(<a class="code" href="group__SE__Fast.html#gae88240871407db238ad8c6a795ba6b91" title="prevent reprocessing">d_nonLiteralsSaved</a>.<a class="code" href="classCVC3_1_1CDMap.html#af5f700035db0db798c645e36dd0b31bd">count</a>(e) > 0) {</div>
<div class="line"><a name="l01452"></a><span class="lineno"> 1452</span>  <span class="comment">// We've seen this non-literal before.</span></div>
<div class="line"><a name="l01453"></a><span class="lineno"> 1453</span>  <a class="code" href="debug_8h.html#ad64155edafde9f067f4868817cd04bdf">TRACE_MSG</a>(<span class="stringliteral">"search"</span>, <span class="stringliteral">"addNonLiteralFact[skipping] => }"</span>);</div>
<div class="line"><a name="l01454"></a><span class="lineno"> 1454</span>  <a class="code" href="debug_8h.html#a600cb2d68efe7cc413cccbb5714c7016">IF_DEBUG</a>(debugger.counter(<span class="stringliteral">"skipped repeated non-literals"</span>)++;)</div>
<div class="line"><a name="l01455"></a><span class="lineno"> 1455</span>  <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l01456"></a><span class="lineno"> 1456</span>  }</div>
<div class="line"><a name="l01457"></a><span class="lineno"> 1457</span>  <span class="comment">// Save the non-literal</span></div>
<div class="line"><a name="l01458"></a><span class="lineno"> 1458</span>  <a class="code" href="group__SE__Fast.html#gae88240871407db238ad8c6a795ba6b91" title="prevent reprocessing">d_nonLiteralsSaved</a>[e]=thm;</div>
<div class="line"><a name="l01459"></a><span class="lineno"> 1459</span>  <span class="keywordtype">bool</span> isCNFclause(<span class="keyword">false</span>);</div>
<div class="line"><a name="l01460"></a><span class="lineno"> 1460</span>  <span class="comment">// Split conjunctions into individual assertions and add them to the</span></div>
<div class="line"><a name="l01461"></a><span class="lineno"> 1461</span>  <span class="comment">// appropriate lists</span></div>
<div class="line"><a name="l01462"></a><span class="lineno"> 1462</span> </div>
<div class="line"><a name="l01463"></a><span class="lineno"> 1463</span>  <span class="keywordtype">int</span> k = e.getKind();</div>
<div class="line"><a name="l01464"></a><span class="lineno"> 1464</span>  <span class="keywordflow">if</span> (k == <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5baf18208f4921c8175373d32e4ce909d42">AND_R</a> || k == <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5bab3535bf1f1c26490d56f63dc20696fa6">IFF_R</a> || k == <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba096c0758089b7d7d0a596b1b4c89a084">ITE_R</a>)</div>
<div class="line"><a name="l01465"></a><span class="lineno"> 1465</span>  {</div>
<div class="line"><a name="l01466"></a><span class="lineno"> 1466</span>  <a class="code" href="group__SE__Fast.html#ga5db32a771408c468676e407075184b64" title="Mappings of literals to vectors of pointers to the corresponding watched literals.">d_circuits</a>.push_back(<span class="keyword">new</span> <a class="code" href="classCVC3_1_1SearchEngineFast.html#a120b136c2c9bc1938e0cd2cca80d91e4">Circuit</a>(<span class="keyword">this</span>, thm));</div>
<div class="line"><a name="l01467"></a><span class="lineno"> 1467</span>  }</div>
<div class="line"><a name="l01468"></a><span class="lineno"> 1468</span> </div>
<div class="line"><a name="l01469"></a><span class="lineno"> 1469</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span>(e.isAnd()) {</div>
<div class="line"><a name="l01470"></a><span class="lineno"> 1470</span>  <span class="keywordflow">for</span>(<span class="keywordtype">int</span> i=0, iend=e.arity(); i<iend; ++i) {</div>
<div class="line"><a name="l01471"></a><span class="lineno"> 1471</span>  <a class="code" href="classCVC3_1_1Theorem.html">Theorem</a> t_i(<a class="code" href="group__SE.html#ga63f2a3cfcfa86820bea2f45cb890cc1c" title="Common proof rules.">d_commonRules</a>-><a class="code" href="classCVC3_1_1CommonProofRules.html#a3f3592ac74d0aa0caa3b9224ea7e61f4">andElim</a>(thm, i));</div>
<div class="line"><a name="l01472"></a><span class="lineno"> 1472</span>  <span class="comment">// Call enqueueFact(), not addFact(), since we are called from</span></div>
<div class="line"><a name="l01473"></a><span class="lineno"> 1473</span>  <span class="comment">// addFact() here</span></div>
<div class="line"><a name="l01474"></a><span class="lineno"> 1474</span>  <span class="keywordflow">if</span>(e[i].isAbsLiteral()) {</div>
<div class="line"><a name="l01475"></a><span class="lineno"> 1475</span>  <a class="code" href="group__SE.html#ga3772c6af7eac91b9ed7fc278edf5ef90" title="Access to theory reasoning.">d_core</a>-><a class="code" href="classCVC3_1_1TheoryCore.html#a0ceab59114fc3864bac9a347c61ec444" title="Enqueue a new fact.">enqueueFact</a>(t_i);</div>
<div class="line"><a name="l01476"></a><span class="lineno"> 1476</span>  }</div>
<div class="line"><a name="l01477"></a><span class="lineno"> 1477</span>  <span class="keywordflow">else</span> <a class="code" href="group__SE__Fast.html#ga03501a968c3c7122a999b1f57d6640a0" title="Notify the search engine about a new non-literal fact.">addNonLiteralFact</a>(t_i);</div>
<div class="line"><a name="l01478"></a><span class="lineno"> 1478</span>  }</div>
<div class="line"><a name="l01479"></a><span class="lineno"> 1479</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l01480"></a><span class="lineno"> 1480</span>  <span class="keywordtype">int</span> unsetLits(0); <span class="comment">// Count the number of unset literals</span></div>
<div class="line"><a name="l01481"></a><span class="lineno"> 1481</span>  <span class="keywordtype">size_t</span> unitLit(0); <span class="comment">// If the #unsetLits==1, this is the only unset literal</span></div>
<div class="line"><a name="l01482"></a><span class="lineno"> 1482</span>  vector<Theorem> thms; <span class="comment">// collect proofs of !l_i for unit prop.</span></div>
<div class="line"><a name="l01483"></a><span class="lineno"> 1483</span>  <span class="keywordflow">if</span>(e.isOr()) {</div>
<div class="line"><a name="l01484"></a><span class="lineno"> 1484</span>  isCNFclause = <span class="keyword">true</span>;</div>
<div class="line"><a name="l01485"></a><span class="lineno"> 1485</span>  <span class="keywordflow">for</span>(<span class="keywordtype">int</span> i=0; isCNFclause && i<e.arity(); ++i) {</div>
<div class="line"><a name="l01486"></a><span class="lineno"> 1486</span>  isCNFclause=e[i].isAbsLiteral();</div>
<div class="line"><a name="l01487"></a><span class="lineno"> 1487</span>  <span class="keywordflow">if</span>(isCNFclause) {</div>
<div class="line"><a name="l01488"></a><span class="lineno"> 1488</span>  <span class="comment">// Check the value of the literal</span></div>
<div class="line"><a name="l01489"></a><span class="lineno"> 1489</span>  <a class="code" href="classCVC3_1_1Literal.html">Literal</a> l(<a class="code" href="group__SE.html#gaf0dbbb1806723760ab8744e96a8c6657" title="Construct a Literal out of an Expr or return an existing one.">newLiteral</a>(e[i]));</div>
<div class="line"><a name="l01490"></a><span class="lineno"> 1490</span>  <span class="keywordflow">if</span>(l.<a class="code" href="classCVC3_1_1Literal.html#a48feb6e7cf83b3a59b94ca0e75627d0f">getValue</a>() > 0) <span class="comment">// The entire clause is true; ignore it</span></div>
<div class="line"><a name="l01491"></a><span class="lineno"> 1491</span>  <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l01492"></a><span class="lineno"> 1492</span>  <span class="keywordflow">if</span>(l.<a class="code" href="classCVC3_1_1Literal.html#a48feb6e7cf83b3a59b94ca0e75627d0f">getValue</a>() == 0) { <span class="comment">// Found unset literal</span></div>
<div class="line"><a name="l01493"></a><span class="lineno"> 1493</span>  unsetLits++; unitLit = i;</div>
<div class="line"><a name="l01494"></a><span class="lineno"> 1494</span>  } <span class="keywordflow">else</span> <span class="comment">// Literal is false, collect the theorem for it</span></div>
<div class="line"><a name="l01495"></a><span class="lineno"> 1495</span>  thms.push_back(l.<a class="code" href="classCVC3_1_1Literal.html#a9d040e10a412d4a86642a9b2776dd258">deriveTheorem</a>());</div>
<div class="line"><a name="l01496"></a><span class="lineno"> 1496</span>  }</div>
<div class="line"><a name="l01497"></a><span class="lineno"> 1497</span>  }</div>
<div class="line"><a name="l01498"></a><span class="lineno"> 1498</span>  }</div>
<div class="line"><a name="l01499"></a><span class="lineno"> 1499</span>  <span class="keywordflow">if</span>(isCNFclause) {</div>
<div class="line"><a name="l01500"></a><span class="lineno"> 1500</span>  <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(e.arity() > 1, <span class="stringliteral">"Clause should have more than one literal"</span>);</div>
<div class="line"><a name="l01501"></a><span class="lineno"> 1501</span>  <span class="comment">// Check if clause is unit or unsat</span></div>
<div class="line"><a name="l01502"></a><span class="lineno"> 1502</span>  <span class="keywordflow">if</span>(unsetLits==0) { <span class="comment">// Contradiction</span></div>
<div class="line"><a name="l01503"></a><span class="lineno"> 1503</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"search"</span>, <span class="stringliteral">"contradictory clause:\n"</span>,</div>
<div class="line"><a name="l01504"></a><span class="lineno"> 1504</span>  <a class="code" href="classCVC3_1_1CompactClause.html">CompactClause</a>(<a class="code" href="classCVC3_1_1Clause.html" title="A class representing a CNF clause (a smart pointer)">Clause</a>(<a class="code" href="group__SE.html#ga3772c6af7eac91b9ed7fc278edf5ef90" title="Access to theory reasoning.">d_core</a>, <a class="code" href="group__SE.html#ga626a0fe24f363d007d729e16d13349e5" title="Variable manager for classes Variable and Literal.">d_vm</a>, thm, <a class="code" href="group__SE.html#gab267d9f29c30c8e26b5c7bcc4d15306a" title="Return the current scope level (for convenience)">scopeLevel</a>())),<span class="stringliteral">""</span>);</div>
<div class="line"><a name="l01505"></a><span class="lineno"> 1505</span>  <a class="code" href="group__SE__Fast.html#ga33ff53b3eeb9811b1510fffd3cdcf234" title="Set the context inconsistent. Takes Theorem(FALSE).">setInconsistent</a>(<a class="code" href="group__SE.html#ga879b68112123e2b4ae7175d85a03bfec" title="Proof rules for the search engine.">d_rules</a>-><a class="code" href="group__SE__Rules.html#ga9c74425b4471d411f58f16781951c441" title=""Conflict" rule (all literals in a clause become FALSE) ">conflictRule</a>(thms, thm));</div>
<div class="line"><a name="l01506"></a><span class="lineno"> 1506</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(unsetLits==1) { <span class="comment">// Unit clause: propagate literal</span></div>
<div class="line"><a name="l01507"></a><span class="lineno"> 1507</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"search"</span>, <span class="stringliteral">"unit clause, unitLit = "</span>+<a class="code" href="namespaceCVC3.html#af69618103f1f0f2eadada0796a2a940c">int2string</a>(unitLit)+<span class="stringliteral">":\n"</span>, </div>
<div class="line"><a name="l01508"></a><span class="lineno"> 1508</span>  <a class="code" href="classCVC3_1_1CompactClause.html">CompactClause</a>(<a class="code" href="classCVC3_1_1Clause.html" title="A class representing a CNF clause (a smart pointer)">Clause</a>(<a class="code" href="group__SE.html#ga3772c6af7eac91b9ed7fc278edf5ef90" title="Access to theory reasoning.">d_core</a>, <a class="code" href="group__SE.html#ga626a0fe24f363d007d729e16d13349e5" title="Variable manager for classes Variable and Literal.">d_vm</a>, thm, <a class="code" href="group__SE.html#gab267d9f29c30c8e26b5c7bcc4d15306a" title="Return the current scope level (for convenience)">scopeLevel</a>())),<span class="stringliteral">""</span>);</div>
<div class="line"><a name="l01509"></a><span class="lineno"> 1509</span>  <a class="code" href="group__SE.html#ga3772c6af7eac91b9ed7fc278edf5ef90" title="Access to theory reasoning.">d_core</a>-><a class="code" href="classCVC3_1_1TheoryCore.html#a0ceab59114fc3864bac9a347c61ec444" title="Enqueue a new fact.">enqueueFact</a>(<a class="code" href="group__SE.html#ga879b68112123e2b4ae7175d85a03bfec" title="Proof rules for the search engine.">d_rules</a>-><a class="code" href="group__SE__Rules.html#gae7221bb8b77313a9b53a4beca9cc0aa0" title="Unit propagation rule: .">unitProp</a>(thms, thm, unitLit));</div>
<div class="line"><a name="l01510"></a><span class="lineno"> 1510</span>  } <span class="keywordflow">else</span> { <span class="comment">// Wrap up the clause</span></div>
<div class="line"><a name="l01511"></a><span class="lineno"> 1511</span>  <a class="code" href="classCVC3_1_1Clause.html" title="A class representing a CNF clause (a smart pointer)">Clause</a> c(<a class="code" href="group__SE.html#ga3772c6af7eac91b9ed7fc278edf5ef90" title="Access to theory reasoning.">d_core</a>, <a class="code" href="group__SE.html#ga626a0fe24f363d007d729e16d13349e5" title="Variable manager for classes Variable and Literal.">d_vm</a>, thm, <a class="code" href="group__SE.html#gab267d9f29c30c8e26b5c7bcc4d15306a" title="Return the current scope level (for convenience)">scopeLevel</a>(), __FILE__, __LINE__);</div>
<div class="line"><a name="l01512"></a><span class="lineno"> 1512</span>  <a class="code" href="debug_8h.html#a600cb2d68efe7cc413cccbb5714c7016">IF_DEBUG</a>(debugger.counter(<span class="stringliteral">"CNF clauses added"</span>)++;)</div>
<div class="line"><a name="l01513"></a><span class="lineno"> 1513</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"search"</span>, <span class="stringliteral">"addNonLiteralFact: adding CNF: "</span>, c, <span class="stringliteral">""</span>);</div>
<div class="line"><a name="l01514"></a><span class="lineno"> 1514</span>  <a class="code" href="group__SE__Fast.html#ga6e64b8f0a42bd4b42d22b50b351219c9" title="Go through all the clauses and check the watch pointers (for debugging)">addNewClause</a>(c);</div>
<div class="line"><a name="l01515"></a><span class="lineno"> 1515</span>  }</div>
<div class="line"><a name="l01516"></a><span class="lineno"> 1516</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l01517"></a><span class="lineno"> 1517</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"search"</span>, <span class="stringliteral">"addNonLiteralFact: adding non-literal: "</span>, thm, <span class="stringliteral">""</span>);</div>
<div class="line"><a name="l01518"></a><span class="lineno"> 1518</span>  <a class="code" href="debug_8h.html#a600cb2d68efe7cc413cccbb5714c7016">IF_DEBUG</a>(debugger.counter(<span class="stringliteral">"added non-literals"</span>)++;)</div>
<div class="line"><a name="l01519"></a><span class="lineno"> 1519</span>  <a class="code" href="group__SE__Fast.html#ga07c8e260b60d83042c97453892a15f38" title="Backtrackable list of non-literals (non-CNF formulas).">d_nonLiterals</a>.<a class="code" href="classCVC3_1_1CDList.html#aa1e8d3591c596d1b9c585dec955b519b">push_back</a>(<a class="code" href="classCVC3_1_1SmartCDO.html">SmartCDO<Theorem></a>(<a class="code" href="group__SE.html#ga3772c6af7eac91b9ed7fc278edf5ef90" title="Access to theory reasoning.">d_core</a>-><a class="code" href="classCVC3_1_1TheoryCore.html#a9377f423f4fd59fdac396794363733a6">getCM</a>()-><a class="code" href="classCVC3_1_1ContextManager.html#a66a7d900301c1459de90b048623d9297">getCurrentContext</a>(), thm));</div>
<div class="line"><a name="l01520"></a><span class="lineno"> 1520</span>  <span class="comment">// d_nonLiteralSimplified[thm.getExpr()] = false;</span></div>
<div class="line"><a name="l01521"></a><span class="lineno"> 1521</span>  }</div>
<div class="line"><a name="l01522"></a><span class="lineno"> 1522</span>  }</div>
<div class="line"><a name="l01523"></a><span class="lineno"> 1523</span>  <a class="code" href="debug_8h.html#ad64155edafde9f067f4868817cd04bdf">TRACE_MSG</a>(<span class="stringliteral">"search"</span>, <span class="stringliteral">"addNonLiteralFact => }"</span>);</div>
<div class="line"><a name="l01524"></a><span class="lineno"> 1524</span> }</div>
<div class="line"><a name="l01525"></a><span class="lineno"> 1525</span> </div>
<div class="line"><a name="l01526"></a><span class="lineno"> 1526</span> <span class="comment"></span></div>
<div class="line"><a name="l01527"></a><span class="lineno"> 1527</span> <span class="comment">//! Notify the search engine about a new literal fact.</span></div>
<div class="line"><a name="l01528"></a><span class="lineno"> 1528</span> <span class="comment"></span><span class="comment">/*! It should be called by TheoryCore::assertFactCore() */</span></div>
<div class="line"><a name="l01529"></a><span class="lineno"> 1529</span> <span class="keywordtype">void</span></div>
<div class="line"><a name="l01530"></a><span class="lineno"><a class="code" href="group__SE__Fast.html#gaef3113afb8dc9ea1b06217ab77f5d713"> 1530</a></span> <a class="code" href="group__SE__Fast.html#gaef3113afb8dc9ea1b06217ab77f5d713" title="Notify the search engine about a new literal fact.">SearchEngineFast::addLiteralFact</a>(<span class="keyword">const</span> <a class="code" href="classCVC3_1_1Theorem.html">Theorem</a>& thm) {</div>
<div class="line"><a name="l01531"></a><span class="lineno"> 1531</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"search"</span>, <span class="stringliteral">"addLiteralFact("</span>, thm, <span class="stringliteral">")"</span>);</div>
<div class="line"><a name="l01532"></a><span class="lineno"> 1532</span>  <span class="comment">// Save the value of the flag to restore it later</span></div>
<div class="line"><a name="l01533"></a><span class="lineno"> 1533</span>  <span class="keywordtype">bool</span> useEF(<a class="code" href="group__SE__Fast.html#gaa1ea8707c10a13a631402860eff87026" title="When true, use TheoryCore::enqueueFact() instead of addFact() in commitFacts()">d_useEnqueueFact</a>);</div>
<div class="line"><a name="l01534"></a><span class="lineno"> 1534</span>  <a class="code" href="group__SE__Fast.html#gaa1ea8707c10a13a631402860eff87026" title="When true, use TheoryCore::enqueueFact() instead of addFact() in commitFacts()">d_useEnqueueFact</a>=<span class="keyword">true</span>;</div>
<div class="line"><a name="l01535"></a><span class="lineno"> 1535</span> </div>
<div class="line"><a name="l01536"></a><span class="lineno"> 1536</span>  <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(thm.<a class="code" href="classCVC3_1_1Theorem.html#aed1590a02166f6099e5538dbf681a60c" title="Check if the theorem is a literal.">isAbsLiteral</a>(),</div>
<div class="line"><a name="l01537"></a><span class="lineno"> 1537</span>  <span class="stringliteral">"addLiteralFact: not a literal: "</span> + thm.<a class="code" href="classCVC3_1_1Theorem.html#ac4b1c9570ffb9cc901627ef2abb9ff77">toString</a>());</div>
<div class="line"><a name="l01538"></a><span class="lineno"> 1538</span>  <span class="comment">//IF_DEBUG(checkAssumpDebug(thm, d_assumptions);)</span></div>
<div class="line"><a name="l01539"></a><span class="lineno"> 1539</span>  <a class="code" href="classCVC3_1_1Literal.html">Literal</a> l(<a class="code" href="group__SE.html#gaf0dbbb1806723760ab8744e96a8c6657" title="Construct a Literal out of an Expr or return an existing one.">newLiteral</a>(thm.<a class="code" href="classCVC3_1_1Theorem.html#af2b97ae5d270ddf1013bf4f3867a7e5d">getExpr</a>()));</div>
<div class="line"><a name="l01540"></a><span class="lineno"> 1540</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"search"</span>, <span class="stringliteral">"addLiteralFact: literal = "</span>, l, <span class="stringliteral">""</span>);</div>
<div class="line"><a name="l01541"></a><span class="lineno"> 1541</span>  <span class="comment">// Only add the literal if it doesn't have any value; otherwise it's</span></div>
<div class="line"><a name="l01542"></a><span class="lineno"> 1542</span>  <span class="comment">// either a contradiction, or it must already be in the list</span></div>
<div class="line"><a name="l01543"></a><span class="lineno"> 1543</span>  <span class="comment">// FIXME: why did we need thm.getScope() != 0 ???</span></div>
<div class="line"><a name="l01544"></a><span class="lineno"> 1544</span>  <span class="keywordflow">if</span> ((l.getValue() == 0 <span class="comment">/* && thm.getScope() != 0 */</span>)</div>
<div class="line"><a name="l01545"></a><span class="lineno"> 1545</span>  <span class="comment">/* || (l.getValue() == 1 && l.getScope() > thm.getScope()) */</span>) {</div>
<div class="line"><a name="l01546"></a><span class="lineno"> 1546</span>  l.setValue(thm, <a class="code" href="group__SE.html#gab267d9f29c30c8e26b5c7bcc4d15306a" title="Return the current scope level (for convenience)">scopeLevel</a>());</div>
<div class="line"><a name="l01547"></a><span class="lineno"> 1547</span>  <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(l.getExpr().isAbsLiteral(),</div>
<div class="line"><a name="l01548"></a><span class="lineno"> 1548</span>  <span class="stringliteral">"addLiteralFact(): pushing non-literal to d_literals:\n "</span></div>
<div class="line"><a name="l01549"></a><span class="lineno"> 1549</span>  +l.getExpr().toString());</div>
<div class="line"><a name="l01550"></a><span class="lineno"> 1550</span>  <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(l.getValue() == 1, <span class="stringliteral">"addLiteralFact(): l = "</span>+l.toString());</div>
<div class="line"><a name="l01551"></a><span class="lineno"> 1551</span>  <a class="code" href="group__SE__Fast.html#gaa6a69bd3df4bb72abd1e9b0fe868fc0d" title="Set of literals to be processed by bcp.">d_literals</a>.push_back(l);</div>
<div class="line"><a name="l01552"></a><span class="lineno"> 1552</span>  <a class="code" href="group__SE__Fast.html#gaf720bf50e81fc4e2561b587d97ec2839" title="Set of asserted literals which may survive accross checkValid() calls.">d_literalSet</a>.<a class="code" href="classCVC3_1_1CDMap.html#a664a15046de83b0af599f488cb420022">insert</a>(l.getExpr(),l);</div>
<div class="line"><a name="l01553"></a><span class="lineno"> 1553</span>  <span class="comment">// Immediately propagate the literal with BCP, unless the SAT</span></div>
<div class="line"><a name="l01554"></a><span class="lineno"> 1554</span>  <span class="comment">// solver is already running</span></div>
<div class="line"><a name="l01555"></a><span class="lineno"> 1555</span>  <span class="keywordflow">if</span>(!<a class="code" href="group__SE__Fast.html#ga6368ec56b20c12896000e370bbb4a3b6" title="True when checkSAT() is running.">d_inCheckSAT</a>) <a class="code" href="group__SE__Fast.html#gac6d49471ba5c76fffc7581e01e423218" title="Boolean constraint propagation.">bcp</a>();</div>
<div class="line"><a name="l01556"></a><span class="lineno"> 1556</span> </div>
<div class="line"><a name="l01557"></a><span class="lineno"> 1557</span> <span class="comment">// if (thm.getScope() != scopeLevel()) {</span></div>
<div class="line"><a name="l01558"></a><span class="lineno"> 1558</span> <span class="comment">// IF_DEBUG(debugger.counter("addLiteralFact adds unreported lit")++;)</span></div>
<div class="line"><a name="l01559"></a><span class="lineno"> 1559</span> <span class="comment">// d_unreportedLits.insert(l.getExpr(),thm,thm.getScope());</span></div>
<div class="line"><a name="l01560"></a><span class="lineno"> 1560</span> <span class="comment">// }</span></div>
<div class="line"><a name="l01561"></a><span class="lineno"> 1561</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(l.getValue() < 0) { <span class="comment">// Contradiction, bcp will die anyway</span></div>
<div class="line"><a name="l01562"></a><span class="lineno"> 1562</span>  <span class="keywordflow">if</span>(l.isNegative())</div>
<div class="line"><a name="l01563"></a><span class="lineno"> 1563</span>  <a class="code" href="group__SE__Fast.html#ga33ff53b3eeb9811b1510fffd3cdcf234" title="Set the context inconsistent. Takes Theorem(FALSE).">setInconsistent</a>(<a class="code" href="group__SE.html#ga63f2a3cfcfa86820bea2f45cb890cc1c" title="Common proof rules.">d_commonRules</a>-><a class="code" href="classCVC3_1_1CommonProofRules.html#a1074822d52c22daacaa78b34ac0635ba">contradictionRule</a>(l.deriveTheorem(), thm));</div>
<div class="line"><a name="l01564"></a><span class="lineno"> 1564</span>  <span class="keywordflow">else</span></div>
<div class="line"><a name="l01565"></a><span class="lineno"> 1565</span>  <a class="code" href="group__SE__Fast.html#ga33ff53b3eeb9811b1510fffd3cdcf234" title="Set the context inconsistent. Takes Theorem(FALSE).">setInconsistent</a>(<a class="code" href="group__SE.html#ga63f2a3cfcfa86820bea2f45cb890cc1c" title="Common proof rules.">d_commonRules</a>-><a class="code" href="classCVC3_1_1CommonProofRules.html#a1074822d52c22daacaa78b34ac0635ba">contradictionRule</a>(thm, l.deriveTheorem()));</div>
<div class="line"><a name="l01566"></a><span class="lineno"> 1566</span>  }</div>
<div class="line"><a name="l01567"></a><span class="lineno"> 1567</span>  <a class="code" href="group__SE__Fast.html#gaa1ea8707c10a13a631402860eff87026" title="When true, use TheoryCore::enqueueFact() instead of addFact() in commitFacts()">d_useEnqueueFact</a>=useEF;</div>
<div class="line"><a name="l01568"></a><span class="lineno"> 1568</span> }</div>
<div class="line"><a name="l01569"></a><span class="lineno"> 1569</span> <span class="comment"></span></div>
<div class="line"><a name="l01570"></a><span class="lineno"> 1570</span> <span class="comment">/*! @brief Redefine newIntAssumption(): we need to add the new theorem</span></div>
<div class="line"><a name="l01571"></a><span class="lineno"> 1571</span> <span class="comment"> * to the appropriate Literal */</span></div>
<div class="line"><a name="l01572"></a><span class="lineno"> 1572</span> <a class="code" href="classCVC3_1_1Theorem.html">Theorem</a></div>
<div class="line"><a name="l01573"></a><span class="lineno"><a class="code" href="group__SE__Fast.html#gaf54422149559aa048f32723a3dc6fcce"> 1573</a></span> <a class="code" href="group__SE__Fast.html#gaf54422149559aa048f32723a3dc6fcce" title="Redefine newIntAssumption(): we need to add the new theorem to the appropriate Literal.">SearchEngineFast::newIntAssumption</a>(<span class="keyword">const</span> <a class="code" href="classCVC3_1_1Expr.html" title="Data structure of expressions in CVC3.">Expr</a>& e) {</div>
<div class="line"><a name="l01574"></a><span class="lineno"> 1574</span>  <a class="code" href="classCVC3_1_1Theorem.html">Theorem</a> thm(<a class="code" href="group__SE.html#ga635768498a239f0193de5f1445676f65" title="Add a new internal asserion.">SearchImplBase::newIntAssumption</a>(e));</div>
<div class="line"><a name="l01575"></a><span class="lineno"> 1575</span>  <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(thm.<a class="code" href="classCVC3_1_1Theorem.html#a05282db6832afb4f198d8c6b2b67aeb1">isAssump</a>(), <span class="stringliteral">"Splitter should be an assumption:"</span> + thm.<a class="code" href="classCVC3_1_1Theorem.html#ac4b1c9570ffb9cc901627ef2abb9ff77">toString</a>());</div>
<div class="line"><a name="l01576"></a><span class="lineno"> 1576</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"search full"</span>, <span class="stringliteral">"Splitter: "</span>, thm.<a class="code" href="classCVC3_1_1Theorem.html#ac4b1c9570ffb9cc901627ef2abb9ff77">toString</a>(), <span class="stringliteral">""</span>);</div>
<div class="line"><a name="l01577"></a><span class="lineno"> 1577</span>  <span class="keyword">const</span> <a class="code" href="classCVC3_1_1Expr.html" title="Data structure of expressions in CVC3.">Expr</a>& expr = thm.<a class="code" href="classCVC3_1_1Theorem.html#af2b97ae5d270ddf1013bf4f3867a7e5d">getExpr</a>();</div>
<div class="line"><a name="l01578"></a><span class="lineno"> 1578</span>  <a class="code" href="classCVC3_1_1Literal.html">Literal</a> l(<a class="code" href="group__SE.html#gaf0dbbb1806723760ab8744e96a8c6657" title="Construct a Literal out of an Expr or return an existing one.">newLiteral</a>(expr));</div>
<div class="line"><a name="l01579"></a><span class="lineno"> 1579</span>  <span class="keywordflow">if</span>(l.<a class="code" href="classCVC3_1_1Literal.html#a48feb6e7cf83b3a59b94ca0e75627d0f">getValue</a>() == 0) {</div>
<div class="line"><a name="l01580"></a><span class="lineno"> 1580</span>  l.<a class="code" href="classCVC3_1_1Literal.html#ad731e76b4037cb3e5d797543596514a1">setValue</a>(thm, <a class="code" href="group__SE.html#gab267d9f29c30c8e26b5c7bcc4d15306a" title="Return the current scope level (for convenience)">scopeLevel</a>());</div>
<div class="line"><a name="l01581"></a><span class="lineno"> 1581</span>  <span class="keywordflow">if</span>(l.<a class="code" href="classCVC3_1_1Literal.html#a4a2e0a421bfcb590c3a7964d2583a94c">getExpr</a>().<a class="code" href="group__ExprPkg.html#gaac535dae48f02fcd093a5b1b1a062211" title="Test if e is an abstract literal.">isAbsLiteral</a>()) {</div>
<div class="line"><a name="l01582"></a><span class="lineno"> 1582</span>  <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(l.<a class="code" href="classCVC3_1_1Literal.html#a48feb6e7cf83b3a59b94ca0e75627d0f">getValue</a>() == 1, <span class="stringliteral">"newIntAssumption(): l = "</span>+l.<a class="code" href="classCVC3_1_1Literal.html#aff53e6b3e4da8c649816441046983a30">toString</a>());</div>
<div class="line"><a name="l01583"></a><span class="lineno"> 1583</span>  <a class="code" href="group__SE__Fast.html#gaa6a69bd3df4bb72abd1e9b0fe868fc0d" title="Set of literals to be processed by bcp.">d_literals</a>.push_back(l);</div>
<div class="line"><a name="l01584"></a><span class="lineno"> 1584</span>  }</div>
<div class="line"><a name="l01585"></a><span class="lineno"> 1585</span>  <span class="keywordflow">else</span></div>
<div class="line"><a name="l01586"></a><span class="lineno"> 1586</span>  <a class="code" href="group__SE__Fast.html#ga0214c0205e48fd792c4d01d3428cd333" title="Set of alive literals that shouldn't be garbage-collected.">d_litsAlive</a>.<a class="code" href="classCVC3_1_1CDList.html#aa1e8d3591c596d1b9c585dec955b519b">push_back</a>(l);</div>
<div class="line"><a name="l01587"></a><span class="lineno"> 1587</span>  }</div>
<div class="line"><a name="l01588"></a><span class="lineno"> 1588</span> </div>
<div class="line"><a name="l01589"></a><span class="lineno"> 1589</span>  </div>
<div class="line"><a name="l01590"></a><span class="lineno"> 1590</span>  <span class="keywordflow">return</span> thm;</div>
<div class="line"><a name="l01591"></a><span class="lineno"> 1591</span> }</div>
<div class="line"><a name="l01592"></a><span class="lineno"> 1592</span> </div>
<div class="line"><a name="l01593"></a><span class="lineno"> 1593</span> <span class="keywordtype">bool</span> </div>
<div class="line"><a name="l01594"></a><span class="lineno"><a class="code" href="group__SE__Fast.html#ga4b55b5f49d921ca4b63f874d8404c4d5"> 1594</a></span> <a class="code" href="group__SE__Fast.html#ga4b55b5f49d921ca4b63f874d8404c4d5" title="Check if the formula has been assumed.">SearchEngineFast::isAssumption</a>(<span class="keyword">const</span> <a class="code" href="classCVC3_1_1Expr.html" title="Data structure of expressions in CVC3.">Expr</a>& e) {</div>
<div class="line"><a name="l01595"></a><span class="lineno"> 1595</span>  <span class="keywordflow">return</span> (<a class="code" href="group__SE.html#ga38ec2c19ebab8525ebc3c6249bf97442" title="Check if the formula has been assumed.">SearchImplBase::isAssumption</a>(e)</div>
<div class="line"><a name="l01596"></a><span class="lineno"> 1596</span>  || (<a class="code" href="group__SE__Fast.html#gae88240871407db238ad8c6a795ba6b91" title="prevent reprocessing">d_nonLiteralsSaved</a>.<a class="code" href="classCVC3_1_1CDMap.html#af5f700035db0db798c645e36dd0b31bd">count</a>(e) > 0));</div>
<div class="line"><a name="l01597"></a><span class="lineno"> 1597</span> }</div>
<div class="line"><a name="l01598"></a><span class="lineno"> 1598</span> </div>
<div class="line"><a name="l01599"></a><span class="lineno"> 1599</span> </div>
<div class="line"><a name="l01600"></a><span class="lineno"> 1600</span> <span class="keywordtype">void</span></div>
<div class="line"><a name="l01601"></a><span class="lineno"><a class="code" href="group__SE__Fast.html#ga40b361c2f9374c541282feca1e237dba"> 1601</a></span> <a class="code" href="group__SE__Fast.html#ga40b361c2f9374c541282feca1e237dba" title="Suggest a splitter to the SearchEngine.">SearchEngineFast::addSplitter</a>(<span class="keyword">const</span> <a class="code" href="classCVC3_1_1Expr.html" title="Data structure of expressions in CVC3.">Expr</a>& e, <span class="keywordtype">int</span> priority) {</div>
<div class="line"><a name="l01602"></a><span class="lineno"> 1602</span>  <span class="comment">// SearchEngine::addSplitter(e, priority);</span></div>
<div class="line"><a name="l01603"></a><span class="lineno"> 1603</span>  <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(e.<a class="code" href="group__ExprPkg.html#gaac535dae48f02fcd093a5b1b1a062211" title="Test if e is an abstract literal.">isAbsLiteral</a>(), <span class="stringliteral">"SearchEngineFast::addSplitter("</span>+e.<a class="code" href="group__ExprPkg.html#gaf3028bb1619f8cc69b66ec712e1adb54" title="Print the expression to a string.">toString</a>()+<span class="stringliteral">")"</span>);</div>
<div class="line"><a name="l01604"></a><span class="lineno"> 1604</span>  <a class="code" href="classCVC3_1_1Literal.html">Literal</a> lit(<a class="code" href="group__SE.html#gaf0dbbb1806723760ab8744e96a8c6657" title="Construct a Literal out of an Expr or return an existing one.">newLiteral</a>(e));</div>
<div class="line"><a name="l01605"></a><span class="lineno"> 1605</span>  <a class="code" href="group__SE.html#ga8ea9b2ab9f50d3ddf595595b1f3d7974" title="Backtracking ordered set of DP-suggested splitters.">d_dpSplitters</a>.<a class="code" href="classCVC3_1_1CDList.html#aa1e8d3591c596d1b9c585dec955b519b">push_back</a>(<a class="code" href="classCVC3_1_1SearchImplBase_1_1Splitter.html" title="Representation of a DP-suggested splitter.">Splitter</a>(lit));</div>
<div class="line"><a name="l01606"></a><span class="lineno"> 1606</span>  <span class="keywordflow">if</span>(priority != 0) {</div>
<div class="line"><a name="l01607"></a><span class="lineno"> 1607</span>  <a class="code" href="group__SE__Fast.html#ga2d54fdadc1b167dbbb366e37e0b97a58" title="Internal (decrementing) count of added splitters, to sort d_litByScores.">d_litSortCount</a>--;</div>
<div class="line"><a name="l01608"></a><span class="lineno"> 1608</span>  lit.score() += priority*10;</div>
<div class="line"><a name="l01609"></a><span class="lineno"> 1609</span>  }</div>
<div class="line"><a name="l01610"></a><span class="lineno"> 1610</span>  <span class="keywordflow">if</span>(!lit.added()) {</div>
<div class="line"><a name="l01611"></a><span class="lineno"> 1611</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"search literals"</span>, <span class="stringliteral">"addSplitter(): adding literal "</span>, lit, <span class="stringliteral">" to d_litsByScores"</span>);</div>
<div class="line"><a name="l01612"></a><span class="lineno"> 1612</span>  <a class="code" href="group__SE__Fast.html#ga57c1c1e58ebd2c1d23a57db97880fbbc" title="Vector of literals sorted by score.">d_litsByScores</a>.push_back(lit);</div>
<div class="line"><a name="l01613"></a><span class="lineno"> 1613</span>  lit.added()=<span class="keyword">true</span>;</div>
<div class="line"><a name="l01614"></a><span class="lineno"> 1614</span>  <span class="keywordflow">if</span>(priority == 0) <a class="code" href="group__SE__Fast.html#ga2d54fdadc1b167dbbb366e37e0b97a58" title="Internal (decrementing) count of added splitters, to sort d_litByScores.">d_litSortCount</a>--;</div>
<div class="line"><a name="l01615"></a><span class="lineno"> 1615</span>  }</div>
<div class="line"><a name="l01616"></a><span class="lineno"> 1616</span>  <span class="keywordflow">if</span>(<a class="code" href="group__SE__Fast.html#ga2d54fdadc1b167dbbb366e37e0b97a58" title="Internal (decrementing) count of added splitters, to sort d_litByScores.">d_litSortCount</a> < 0) {</div>
<div class="line"><a name="l01617"></a><span class="lineno"> 1617</span>  ::stable_sort(<a class="code" href="group__SE__Fast.html#ga57c1c1e58ebd2c1d23a57db97880fbbc" title="Vector of literals sorted by score.">d_litsByScores</a>.begin(), <a class="code" href="group__SE__Fast.html#ga57c1c1e58ebd2c1d23a57db97880fbbc" title="Vector of literals sorted by score.">d_litsByScores</a>.end(), <a class="code" href="search__fast_8cpp.html#a55afec8e553f4d1c6487c4e63a0c2375" title="Total order on literals for the initial sort.">compareLits</a>);</div>
<div class="line"><a name="l01618"></a><span class="lineno"> 1618</span>  <a class="code" href="group__SE__Fast.html#ga2d54fdadc1b167dbbb366e37e0b97a58" title="Internal (decrementing) count of added splitters, to sort d_litByScores.">d_litSortCount</a>=<a class="code" href="group__SE__Fast.html#ga57c1c1e58ebd2c1d23a57db97880fbbc" title="Vector of literals sorted by score.">d_litsByScores</a>.size();</div>
<div class="line"><a name="l01619"></a><span class="lineno"> 1619</span>  }</div>
<div class="line"><a name="l01620"></a><span class="lineno"> 1620</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"search splitters"</span>,<span class="stringliteral">"addSplitter => "</span>, lits2str(<a class="code" href="group__SE__Fast.html#ga57c1c1e58ebd2c1d23a57db97880fbbc" title="Vector of literals sorted by score.">d_litsByScores</a>),<span class="stringliteral">""</span>);</div>
<div class="line"><a name="l01621"></a><span class="lineno"> 1621</span> }</div>
<div class="line"><a name="l01622"></a><span class="lineno"> 1622</span> </div>
<div class="line"><a name="l01623"></a><span class="lineno"> 1623</span> </div>
<div class="line"><a name="l01624"></a><span class="lineno"><a class="code" href="group__SE__Fast.html#gaac7ba666d67d3d4808642c5c7858db95"> 1624</a></span> <a class="code" href="namespaceCVC3.html#a060d21b3207cc3471e24f8dbcff3498b">QueryResult</a> <a class="code" href="group__SE__Fast.html#gaac7ba666d67d3d4808642c5c7858db95" title="Private helper function for checkValid and restart.">SearchEngineFast::checkValidMain</a>(<span class="keyword">const</span> <a class="code" href="classCVC3_1_1Expr.html" title="Data structure of expressions in CVC3.">Expr</a>& e2)</div>
<div class="line"><a name="l01625"></a><span class="lineno"> 1625</span> {</div>
<div class="line"><a name="l01626"></a><span class="lineno"> 1626</span>  <span class="comment">// Propagate the literals asserted before checkValid()</span></div>
<div class="line"><a name="l01627"></a><span class="lineno"> 1627</span>  <span class="keywordflow">for</span>(<a class="code" href="classCVC3_1_1CDMap.html">CDMap<Expr,Literal>::iterator</a> i=<a class="code" href="group__SE__Fast.html#gaf720bf50e81fc4e2561b587d97ec2839" title="Set of asserted literals which may survive accross checkValid() calls.">d_literalSet</a>.<a class="code" href="classCVC3_1_1CDMap.html#a5d57eb1210dab2fadcd85a2f01e6d6d1">begin</a>(),</div>
<div class="line"><a name="l01628"></a><span class="lineno"> 1628</span>  iend=<a class="code" href="group__SE__Fast.html#gaf720bf50e81fc4e2561b587d97ec2839" title="Set of asserted literals which may survive accross checkValid() calls.">d_literalSet</a>.<a class="code" href="classCVC3_1_1CDMap.html#a2a26c7cc4db12cb17d273db5cfa5a890">end</a>(); i!=iend; ++i)</div>
<div class="line"><a name="l01629"></a><span class="lineno"> 1629</span>  <a class="code" href="group__SE__Fast.html#gaa6a69bd3df4bb72abd1e9b0fe868fc0d" title="Set of literals to be processed by bcp.">d_literals</a>.push_back((*i).second);</div>
<div class="line"><a name="l01630"></a><span class="lineno"> 1630</span> </div>
<div class="line"><a name="l01631"></a><span class="lineno"> 1631</span>  <span class="comment">// Run the SAT solver</span></div>
<div class="line"><a name="l01632"></a><span class="lineno"> 1632</span>  <a class="code" href="namespaceCVC3.html#a060d21b3207cc3471e24f8dbcff3498b">QueryResult</a> result = <a class="code" href="group__SE__Fast.html#gac68652e5ed46a097f846ba9a86fcd630">checkSAT</a>();</div>
<div class="line"><a name="l01633"></a><span class="lineno"> 1633</span> </div>
<div class="line"><a name="l01634"></a><span class="lineno"> 1634</span>  <a class="code" href="classCVC3_1_1Theorem.html">Theorem</a> res;</div>
<div class="line"><a name="l01635"></a><span class="lineno"> 1635</span>  <span class="keywordflow">if</span> (result == <a class="code" href="namespaceCVC3.html#a060d21b3207cc3471e24f8dbcff3498baba54da61f61403de5204b899fe55d92f">UNSATISFIABLE</a>)</div>
<div class="line"><a name="l01636"></a><span class="lineno"> 1636</span>  res = <a class="code" href="group__SE__Fast.html#gae961b4fb4bb059a1d867447fc487aaee" title="Theorem(FALSE) which generated a conflict.">d_conflictTheorem</a>;</div>
<div class="line"><a name="l01637"></a><span class="lineno"> 1637</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (result == <a class="code" href="namespaceCVC3.html#a060d21b3207cc3471e24f8dbcff3498bad11a6bd5ab8c3e02ec8503e7a7860a61">SATISFIABLE</a>) {</div>
<div class="line"><a name="l01638"></a><span class="lineno"> 1638</span>  <span class="comment">// Set counter-example</span></div>
<div class="line"><a name="l01639"></a><span class="lineno"> 1639</span>  vector<Expr> a;</div>
<div class="line"><a name="l01640"></a><span class="lineno"> 1640</span>  <span class="keywordtype">unsigned</span> i;</div>
<div class="line"><a name="l01641"></a><span class="lineno"> 1641</span>  <a class="code" href="classCVC3_1_1Theorem.html">Theorem</a> thm;</div>
<div class="line"><a name="l01642"></a><span class="lineno"> 1642</span> </div>
<div class="line"><a name="l01643"></a><span class="lineno"> 1643</span>  <a class="code" href="group__SE.html#gaf6841e86841006b6917d46664de64d21" title="Assumptions from the last unsuccessful checkValid call. These are used by getCounterExample.">d_lastCounterExample</a>.<a class="code" href="classCVC3_1_1ExprHashMap.html#aa20f14dba09537171af45bf479b99c66">clear</a>();</div>
<div class="line"><a name="l01644"></a><span class="lineno"> 1644</span>  <span class="keywordflow">for</span> (i=<a class="code" href="group__SE__Fast.html#gae4a9e9926613365979d36e2a98769381" title="Size of d_nonLiterals before most recent query.">d_nonlitQueryStart</a>; i < <a class="code" href="group__SE__Fast.html#ga8472c82be89057f32c68a0f0423215a2" title="Size of d_nonLiterals after query (not including DP-generated non-literals)">d_nonlitQueryEnd</a>; ++i) {</div>
<div class="line"><a name="l01645"></a><span class="lineno"> 1645</span>  thm = <a class="code" href="group__SE__Fast.html#ga07c8e260b60d83042c97453892a15f38" title="Backtrackable list of non-literals (non-CNF formulas).">d_nonLiterals</a>[i].get();</div>
<div class="line"><a name="l01646"></a><span class="lineno"> 1646</span>  <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(thm.<a class="code" href="classCVC3_1_1Theorem.html#af2b97ae5d270ddf1013bf4f3867a7e5d">getExpr</a>().<a class="code" href="group__ExprPkg.html#gadf8596df73fa69ff8e6a22b9321f5c34">isTrue</a>(),</div>
<div class="line"><a name="l01647"></a><span class="lineno"> 1647</span>  <span class="stringliteral">"original nonLiteral doesn't simplify to true"</span>);</div>
<div class="line"><a name="l01648"></a><span class="lineno"> 1648</span>  thm.<a class="code" href="classCVC3_1_1Theorem.html#a524b4dafa4fb8f14742baa856612d92b">getLeafAssumptions</a>(a);</div>
<div class="line"><a name="l01649"></a><span class="lineno"> 1649</span>  <span class="keywordflow">for</span> (vector<Expr>::iterator i=a.begin(), iend=a.end(); i != iend; ++i) {</div>
<div class="line"><a name="l01650"></a><span class="lineno"> 1650</span>  <a class="code" href="group__SE.html#gaf6841e86841006b6917d46664de64d21" title="Assumptions from the last unsuccessful checkValid call. These are used by getCounterExample.">d_lastCounterExample</a>[*i] = <span class="keyword">true</span>;</div>
<div class="line"><a name="l01651"></a><span class="lineno"> 1651</span>  }</div>
<div class="line"><a name="l01652"></a><span class="lineno"> 1652</span>  a.clear();</div>
<div class="line"><a name="l01653"></a><span class="lineno"> 1653</span>  }</div>
<div class="line"><a name="l01654"></a><span class="lineno"> 1654</span>  <span class="keywordflow">for</span> (i=<a class="code" href="group__SE__Fast.html#ga71a2e31fe2a16420a416b5aeced09455" title="Size of d_clauses before most recent query.">d_clausesQueryStart</a>; i < <a class="code" href="group__SE__Fast.html#ga6dbfd2cd66dee5634f096593f26c47e7" title="Size of d_clauses after query.">d_clausesQueryEnd</a>; ++i) {</div>
<div class="line"><a name="l01655"></a><span class="lineno"> 1655</span>  thm = <a class="code" href="group__SE.html#gaaa621df0c7e2a2043139e6451eab7072" title="Our version of simplifier: take Theorem(e), apply simplifier to get Theorem(e==e'), return Theorem(e')">simplify</a>(((<a class="code" href="classCVC3_1_1Clause.html" title="A class representing a CNF clause (a smart pointer)">Clause</a>)<a class="code" href="group__SE__Fast.html#gaa1dd9a29eac4c7da6c669d7888909ca5" title="Backtrackable list of clauses.">d_clauses</a>[i]).getTheorem());</div>
<div class="line"><a name="l01656"></a><span class="lineno"> 1656</span>  <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(thm.<a class="code" href="classCVC3_1_1Theorem.html#af2b97ae5d270ddf1013bf4f3867a7e5d">getExpr</a>().<a class="code" href="group__ExprPkg.html#gadf8596df73fa69ff8e6a22b9321f5c34">isTrue</a>(),</div>
<div class="line"><a name="l01657"></a><span class="lineno"> 1657</span>  <span class="stringliteral">"original nonLiteral doesn't simplify to true"</span>);</div>
<div class="line"><a name="l01658"></a><span class="lineno"> 1658</span>  thm.<a class="code" href="classCVC3_1_1Theorem.html#a524b4dafa4fb8f14742baa856612d92b">getLeafAssumptions</a>(a);</div>
<div class="line"><a name="l01659"></a><span class="lineno"> 1659</span>  <span class="keywordflow">for</span> (vector<Expr>::iterator i=a.begin(), iend=a.end(); i != iend; ++i) {</div>
<div class="line"><a name="l01660"></a><span class="lineno"> 1660</span>  <a class="code" href="group__SE.html#gaf6841e86841006b6917d46664de64d21" title="Assumptions from the last unsuccessful checkValid call. These are used by getCounterExample.">d_lastCounterExample</a>[*i] = <span class="keyword">true</span>;</div>
<div class="line"><a name="l01661"></a><span class="lineno"> 1661</span>  }</div>
<div class="line"><a name="l01662"></a><span class="lineno"> 1662</span>  a.clear();</div>
<div class="line"><a name="l01663"></a><span class="lineno"> 1663</span>  }</div>
<div class="line"><a name="l01664"></a><span class="lineno"> 1664</span>  }</div>
<div class="line"><a name="l01665"></a><span class="lineno"> 1665</span>  <span class="keywordflow">else</span> <span class="keywordflow">return</span> result;</div>
<div class="line"><a name="l01666"></a><span class="lineno"> 1666</span> </div>
<div class="line"><a name="l01667"></a><span class="lineno"> 1667</span>  <a class="code" href="group__SE.html#ga0d509e38a03048dcbdb9e28f3f5da724" title="Process result of checkValid.">processResult</a>(res, e2);</div>
<div class="line"><a name="l01668"></a><span class="lineno"> 1668</span> </div>
<div class="line"><a name="l01669"></a><span class="lineno"> 1669</span>  <span class="keywordflow">if</span> (result == <a class="code" href="namespaceCVC3.html#a060d21b3207cc3471e24f8dbcff3498baba54da61f61403de5204b899fe55d92f">UNSATISFIABLE</a>) {</div>
<div class="line"><a name="l01670"></a><span class="lineno"> 1670</span>  <a class="code" href="group__SE.html#ga3772c6af7eac91b9ed7fc278edf5ef90" title="Access to theory reasoning.">d_core</a>-><a class="code" href="classCVC3_1_1TheoryCore.html#a9377f423f4fd59fdac396794363733a6">getCM</a>()-><a class="code" href="classCVC3_1_1ContextManager.html#a0a0dc6f3a5a7ce61cf02566fe31b8691">popto</a>(<a class="code" href="group__SE.html#ga640e08e2b051e08f2abdd4111b9a2e71" title="The bottom-most scope for the current call to checkSAT (where conflict clauses are still valid)...">d_bottomScope</a>);</div>
<div class="line"><a name="l01671"></a><span class="lineno"> 1671</span>  d_litsMaxScorePos = 0; <span class="comment">// from decision engine</span></div>
<div class="line"><a name="l01672"></a><span class="lineno"> 1672</span> </div>
<div class="line"><a name="l01673"></a><span class="lineno"> 1673</span>  <span class="comment">// Clear data structures</span></div>
<div class="line"><a name="l01674"></a><span class="lineno"> 1674</span>  <a class="code" href="group__SE__Fast.html#gad05f577d00e93fefed74eb0c19015090" title="Unprocessed unit conflict clauses.">d_unitConflictClauses</a>.clear();</div>
<div class="line"><a name="l01675"></a><span class="lineno"> 1675</span>  <a class="code" href="group__SE__Fast.html#gadf72861b6482f6c585f3199d1436f7be" title="Clear the list of asserted literals (d_literals)">clearLiterals</a>();</div>
<div class="line"><a name="l01676"></a><span class="lineno"> 1676</span>  <a class="code" href="group__SE__Fast.html#gafa7937cc0b7d14c0aafb1f9c20abf011" title="Clear the local fact queue.">clearFacts</a>();</div>
<div class="line"><a name="l01677"></a><span class="lineno"> 1677</span> </div>
<div class="line"><a name="l01678"></a><span class="lineno"> 1678</span>  <a class="code" href="classCVC3_1_1Theorem.html">Theorem</a> e_iff_e2(<a class="code" href="group__SE.html#ga63f2a3cfcfa86820bea2f45cb890cc1c" title="Common proof rules.">d_commonRules</a>-><a class="code" href="classCVC3_1_1CommonProofRules.html#af38f25446a561384c3de66392c4d3544" title="e1 <=> e2 ==> ~e1 <=> ~e2">iffContrapositive</a>(<a class="code" href="group__SE__Fast.html#gaa8b578a017bcddd578e943add44c2940" title="Theorem which records simplification of the last query.">d_simplifiedThm</a>));</div>
<div class="line"><a name="l01679"></a><span class="lineno"> 1679</span>  <a class="code" href="group__SE.html#ga88ba664573602ecfca1d6eadc14a30af" title="Theorem from the last successful checkValid call. It is used by getProof and getAssumptions.">d_lastValid</a> =</div>
<div class="line"><a name="l01680"></a><span class="lineno"> 1680</span>  <a class="code" href="group__SE.html#ga63f2a3cfcfa86820bea2f45cb890cc1c" title="Common proof rules.">d_commonRules</a>-><a class="code" href="classCVC3_1_1CommonProofRules.html#aebbcd4a194e4fdca0bcd16143fb03a75">iffMP</a>(d_lastValid, <a class="code" href="group__SE.html#ga63f2a3cfcfa86820bea2f45cb890cc1c" title="Common proof rules.">d_commonRules</a>-><a class="code" href="classCVC3_1_1CommonProofRules.html#a0a87e88508f49b73037e0024afa841bf" title=" (same for IFF)">symmetryRule</a>(e_iff_e2));</div>
<div class="line"><a name="l01681"></a><span class="lineno"> 1681</span>  <a class="code" href="debug_8h.html#a600cb2d68efe7cc413cccbb5714c7016">IF_DEBUG</a>(checkAssumpDebug(d_lastValid, <a class="code" href="group__SE.html#ga83dfe2d2d85bacf5e4aa10c0320a140b" title="Maintain the list of current assumptions (user asserts and splitters) for getAssumptions().">d_assumptions</a>);)</div>
<div class="line"><a name="l01682"></a><span class="lineno"> 1682</span>  <a class="code" href="debug_8h.html#ad64155edafde9f067f4868817cd04bdf">TRACE_MSG</a>(<span class="stringliteral">"search terse"</span>, <span class="stringliteral">"checkValid => true}"</span>);</div>
<div class="line"><a name="l01683"></a><span class="lineno"> 1683</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"search"</span>, <span class="stringliteral">"checkValid => true; theorem = "</span>, d_lastValid, <span class="stringliteral">"}"</span>);</div>
<div class="line"><a name="l01684"></a><span class="lineno"> 1684</span>  <a class="code" href="group__SE.html#ga3772c6af7eac91b9ed7fc278edf5ef90" title="Access to theory reasoning.">d_core</a>-><a class="code" href="classCVC3_1_1TheoryCore.html#a9377f423f4fd59fdac396794363733a6">getCM</a>()-><a class="code" href="classCVC3_1_1ContextManager.html#ae74b114a270baff44940a8916d958e9c">pop</a>();</div>
<div class="line"><a name="l01685"></a><span class="lineno"> 1685</span>  }</div>
<div class="line"><a name="l01686"></a><span class="lineno"> 1686</span>  <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l01687"></a><span class="lineno"> 1687</span>  <a class="code" href="debug_8h.html#ad64155edafde9f067f4868817cd04bdf">TRACE_MSG</a>(<span class="stringliteral">"search terse"</span>, <span class="stringliteral">"checkValid => false}"</span>);</div>
<div class="line"><a name="l01688"></a><span class="lineno"> 1688</span>  <a class="code" href="debug_8h.html#ad64155edafde9f067f4868817cd04bdf">TRACE_MSG</a>(<span class="stringliteral">"search"</span>, <span class="stringliteral">"checkValid => false; }"</span>);</div>
<div class="line"><a name="l01689"></a><span class="lineno"> 1689</span>  <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(<a class="code" href="group__SE__Fast.html#gad05f577d00e93fefed74eb0c19015090" title="Unprocessed unit conflict clauses.">d_unitConflictClauses</a>.size() == 0, <span class="stringliteral">"checkValid(): d_unitConflictClauses postcondition violated"</span>);</div>
<div class="line"><a name="l01690"></a><span class="lineno"> 1690</span>  <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(<a class="code" href="group__SE__Fast.html#gaa6a69bd3df4bb72abd1e9b0fe868fc0d" title="Set of literals to be processed by bcp.">d_literals</a>.size() == 0, <span class="stringliteral">"checkValid(): d_literals postcondition violated"</span>);</div>
<div class="line"><a name="l01691"></a><span class="lineno"> 1691</span>  <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(<a class="code" href="group__SE__Fast.html#ga4b05dccebac3de019dc112ab3dffc988" title="Queue of derived facts to be sent to DPs.">d_factQueue</a>.empty(), <span class="stringliteral">"checkValid(): d_factQueue postcondition violated"</span>);</div>
<div class="line"><a name="l01692"></a><span class="lineno"> 1692</span>  }</div>
<div class="line"><a name="l01693"></a><span class="lineno"> 1693</span>  <span class="keywordflow">return</span> result;</div>
<div class="line"><a name="l01694"></a><span class="lineno"> 1694</span> }</div>
<div class="line"><a name="l01695"></a><span class="lineno"> 1695</span> </div>
<div class="line"><a name="l01696"></a><span class="lineno"> 1696</span> </div>
<div class="line"><a name="l01697"></a><span class="lineno"><a class="code" href="group__SE__Fast.html#ga1db688bc99f93a978079b3d2efd1bd9f"> 1697</a></span> <a class="code" href="namespaceCVC3.html#a060d21b3207cc3471e24f8dbcff3498b">QueryResult</a> <a class="code" href="group__SE__Fast.html#ga1db688bc99f93a978079b3d2efd1bd9f" title="Implementation of the API call.">SearchEngineFast::checkValidInternal</a>(<span class="keyword">const</span> <a class="code" href="classCVC3_1_1Expr.html" title="Data structure of expressions in CVC3.">Expr</a>& e)</div>
<div class="line"><a name="l01698"></a><span class="lineno"> 1698</span> {</div>
<div class="line"><a name="l01699"></a><span class="lineno"> 1699</span>  <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(<a class="code" href="group__SE__Fast.html#gad05f577d00e93fefed74eb0c19015090" title="Unprocessed unit conflict clauses.">d_unitConflictClauses</a>.size() == 0, <span class="stringliteral">"checkValid(): d_unitConflitClauses precondition violated"</span>);</div>
<div class="line"><a name="l01700"></a><span class="lineno"> 1700</span>  <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(<a class="code" href="group__SE__Fast.html#ga4b05dccebac3de019dc112ab3dffc988" title="Queue of derived facts to be sent to DPs.">d_factQueue</a>.empty(), <span class="stringliteral">"checkValid(): d_factQueue precondition violated"</span>);</div>
<div class="line"><a name="l01701"></a><span class="lineno"> 1701</span> </div>
<div class="line"><a name="l01702"></a><span class="lineno"> 1702</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"search"</span>, <span class="stringliteral">"checkValid("</span>, e, <span class="stringliteral">") {"</span>);</div>
<div class="line"><a name="l01703"></a><span class="lineno"> 1703</span>  <a class="code" href="debug_8h.html#ad64155edafde9f067f4868817cd04bdf">TRACE_MSG</a>(<span class="stringliteral">"search terse"</span>, <span class="stringliteral">"checkValid() {"</span>);</div>
<div class="line"><a name="l01704"></a><span class="lineno"> 1704</span> </div>
<div class="line"><a name="l01705"></a><span class="lineno"> 1705</span>  <span class="keywordflow">if</span> (!e.<a class="code" href="group__ExprPkg.html#ga42929221eb172250697b72c28af6de07" title="Get the type. Recursively compute if necessary.">getType</a>().<a class="code" href="classCVC3_1_1Type.html#a38bba404056eadf3c283a67ab2347e02">isBool</a>()) {</div>
<div class="line"><a name="l01706"></a><span class="lineno"> 1706</span>  <span class="keywordflow">throw</span> <a class="code" href="classCVC3_1_1TypecheckException.html">TypecheckException</a></div>
<div class="line"><a name="l01707"></a><span class="lineno"> 1707</span>  (<span class="stringliteral">"checking validity of a non-boolean expression:\n\n "</span></div>
<div class="line"><a name="l01708"></a><span class="lineno"> 1708</span>  + e.<a class="code" href="group__ExprPkg.html#gaf3028bb1619f8cc69b66ec712e1adb54" title="Print the expression to a string.">toString</a>()</div>
<div class="line"><a name="l01709"></a><span class="lineno"> 1709</span>  + <span class="stringliteral">"\n\nwhich has the following type:\n\n "</span></div>
<div class="line"><a name="l01710"></a><span class="lineno"> 1710</span>  + e.<a class="code" href="group__ExprPkg.html#ga42929221eb172250697b72c28af6de07" title="Get the type. Recursively compute if necessary.">getType</a>().<a class="code" href="classCVC3_1_1Type.html#a2f5ce4b1973ec02b2f2b2eba8ce3cc50">toString</a>());</div>
<div class="line"><a name="l01711"></a><span class="lineno"> 1711</span>  }</div>
<div class="line"><a name="l01712"></a><span class="lineno"> 1712</span> </div>
<div class="line"><a name="l01713"></a><span class="lineno"> 1713</span>  <span class="comment">// A successful query should leave the context unchanged</span></div>
<div class="line"><a name="l01714"></a><span class="lineno"> 1714</span>  <a class="code" href="group__SE.html#ga3772c6af7eac91b9ed7fc278edf5ef90" title="Access to theory reasoning.">d_core</a>-><a class="code" href="classCVC3_1_1TheoryCore.html#a9377f423f4fd59fdac396794363733a6">getCM</a>()-><a class="code" href="classCVC3_1_1ContextManager.html#a90e301927cc935d561b81761d4ab2ee8">push</a>();</div>
<div class="line"><a name="l01715"></a><span class="lineno"> 1715</span>  <a class="code" href="group__SE__Fast.html#gaab577b22f09d51b9b15954b9a529c05d">d_conflictClauseManager</a>.<a class="code" href="classCVC3_1_1SearchEngineFast_1_1ConflictClauseManager.html#ab6f279d5486d100804dcd8e749cb6665">setRestorePoint</a>();</div>
<div class="line"><a name="l01716"></a><span class="lineno"> 1716</span>  <a class="code" href="group__SE.html#ga640e08e2b051e08f2abdd4111b9a2e71" title="The bottom-most scope for the current call to checkSAT (where conflict clauses are still valid)...">d_bottomScope</a> = <a class="code" href="group__SE.html#gab267d9f29c30c8e26b5c7bcc4d15306a" title="Return the current scope level (for convenience)">scopeLevel</a>();</div>
<div class="line"><a name="l01717"></a><span class="lineno"> 1717</span> </div>
<div class="line"><a name="l01718"></a><span class="lineno"> 1718</span>  <span class="comment">// First, simplify the NEGATION of the given expression: that's what</span></div>
<div class="line"><a name="l01719"></a><span class="lineno"> 1719</span>  <span class="comment">// we'll assert</span></div>
<div class="line"><a name="l01720"></a><span class="lineno"> 1720</span>  <a class="code" href="group__SE__Fast.html#gaa8b578a017bcddd578e943add44c2940" title="Theorem which records simplification of the last query.">d_simplifiedThm</a> = <a class="code" href="group__SE.html#ga3772c6af7eac91b9ed7fc278edf5ef90" title="Access to theory reasoning.">d_core</a>-><a class="code" href="classCVC3_1_1TheoryCore.html#acc963fd43994f06d3647394b731e835c">getExprTrans</a>()-><a class="code" href="classCVC3_1_1ExprTransform.html#a39652560061ab1172040113d9dfa25f6">preprocess</a>(e.<a class="code" href="group__ExprPkg.html#gab1ce461dc931af73bf04e88c8d37dcbc">negate</a>());</div>
<div class="line"><a name="l01721"></a><span class="lineno"> 1721</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"search"</span>, <span class="stringliteral">"checkValid: simplifiedThm = "</span>, <a class="code" href="group__SE__Fast.html#gaa8b578a017bcddd578e943add44c2940" title="Theorem which records simplification of the last query.">d_simplifiedThm</a>, <span class="stringliteral">""</span>);</div>
<div class="line"><a name="l01722"></a><span class="lineno"> 1722</span> </div>
<div class="line"><a name="l01723"></a><span class="lineno"> 1723</span>  <span class="keyword">const</span> <a class="code" href="classCVC3_1_1Expr.html" title="Data structure of expressions in CVC3.">Expr</a>& not_e2 = <a class="code" href="group__SE__Fast.html#gaa8b578a017bcddd578e943add44c2940" title="Theorem which records simplification of the last query.">d_simplifiedThm</a>.<a class="code" href="classCVC3_1_1CDO.html#a818fcacc7b30b0f05347335ab125626c">get</a>().<a class="code" href="classCVC3_1_1Theorem.html#a97d957fcbf9094480851b1d2e5d3729f">getRHS</a>();</div>
<div class="line"><a name="l01724"></a><span class="lineno"> 1724</span>  <a class="code" href="classCVC3_1_1Expr.html" title="Data structure of expressions in CVC3.">Expr</a> e2 = not_e2.<a class="code" href="group__ExprPkg.html#gab1ce461dc931af73bf04e88c8d37dcbc">negate</a>();</div>
<div class="line"><a name="l01725"></a><span class="lineno"> 1725</span> </div>
<div class="line"><a name="l01726"></a><span class="lineno"> 1726</span>  <span class="comment">// Assert not_e2 if it's not already asserted</span></div>
<div class="line"><a name="l01727"></a><span class="lineno"> 1727</span>  <a class="code" href="debug_8h.html#ad64155edafde9f067f4868817cd04bdf">TRACE_MSG</a>(<span class="stringliteral">"search terse"</span>, <span class="stringliteral">"checkValid: Asserting !e: "</span>);</div>
<div class="line"><a name="l01728"></a><span class="lineno"> 1728</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"search"</span>, <span class="stringliteral">"checkValid: Asserting !e: "</span>, not_e2, <span class="stringliteral">""</span>);</div>
<div class="line"><a name="l01729"></a><span class="lineno"> 1729</span>  <a class="code" href="classCVC3_1_1Theorem.html">Theorem</a> not_e2_thm;</div>
<div class="line"><a name="l01730"></a><span class="lineno"> 1730</span>  <a class="code" href="group__SE__Fast.html#gae4a9e9926613365979d36e2a98769381" title="Size of d_nonLiterals before most recent query.">d_nonlitQueryStart</a> = <a class="code" href="group__SE__Fast.html#ga07c8e260b60d83042c97453892a15f38" title="Backtrackable list of non-literals (non-CNF formulas).">d_nonLiterals</a>.<a class="code" href="classCVC3_1_1CDList.html#adf92d0f391d73e7ac70da57db135af27">size</a>();</div>
<div class="line"><a name="l01731"></a><span class="lineno"> 1731</span>  <a class="code" href="group__SE__Fast.html#ga71a2e31fe2a16420a416b5aeced09455" title="Size of d_clauses before most recent query.">d_clausesQueryStart</a> = <a class="code" href="group__SE__Fast.html#gaa1dd9a29eac4c7da6c669d7888909ca5" title="Backtrackable list of clauses.">d_clauses</a>.<a class="code" href="classCVC3_1_1CDList.html#adf92d0f391d73e7ac70da57db135af27">size</a>();</div>
<div class="line"><a name="l01732"></a><span class="lineno"> 1732</span>  <span class="keywordflow">if</span>(<a class="code" href="group__SE.html#ga83dfe2d2d85bacf5e4aa10c0320a140b" title="Maintain the list of current assumptions (user asserts and splitters) for getAssumptions().">d_assumptions</a>.<a class="code" href="classCVC3_1_1CDMap.html#af5f700035db0db798c645e36dd0b31bd">count</a>(not_e2) == 0) {</div>
<div class="line"><a name="l01733"></a><span class="lineno"> 1733</span>  not_e2_thm = <a class="code" href="group__SE.html#gaf46a82b16f76c9e97cfe252d4398eac7" title="Generate and add a new assertion to the set of assertions in the current context. This should only be...">newUserAssumption</a>(not_e2);</div>
<div class="line"><a name="l01734"></a><span class="lineno"> 1734</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l01735"></a><span class="lineno"> 1735</span>  not_e2_thm = <a class="code" href="group__SE.html#ga83dfe2d2d85bacf5e4aa10c0320a140b" title="Maintain the list of current assumptions (user asserts and splitters) for getAssumptions().">d_assumptions</a>[not_e2];</div>
<div class="line"><a name="l01736"></a><span class="lineno"> 1736</span>  }</div>
<div class="line"><a name="l01737"></a><span class="lineno"> 1737</span>  <span class="comment">// d_core->addFact(not_e2_thm);</span></div>
<div class="line"><a name="l01738"></a><span class="lineno"> 1738</span>  <a class="code" href="group__SE__Fast.html#ga8472c82be89057f32c68a0f0423215a2" title="Size of d_nonLiterals after query (not including DP-generated non-literals)">d_nonlitQueryEnd</a> = <a class="code" href="group__SE__Fast.html#ga07c8e260b60d83042c97453892a15f38" title="Backtrackable list of non-literals (non-CNF formulas).">d_nonLiterals</a>.<a class="code" href="classCVC3_1_1CDList.html#adf92d0f391d73e7ac70da57db135af27">size</a>();</div>
<div class="line"><a name="l01739"></a><span class="lineno"> 1739</span>  <a class="code" href="group__SE__Fast.html#ga6dbfd2cd66dee5634f096593f26c47e7" title="Size of d_clauses after query.">d_clausesQueryEnd</a> = <a class="code" href="group__SE__Fast.html#gaa1dd9a29eac4c7da6c669d7888909ca5" title="Backtrackable list of clauses.">d_clauses</a>.<a class="code" href="classCVC3_1_1CDList.html#adf92d0f391d73e7ac70da57db135af27">size</a>();</div>
<div class="line"><a name="l01740"></a><span class="lineno"> 1740</span> </div>
<div class="line"><a name="l01741"></a><span class="lineno"> 1741</span>  <span class="comment">// Reset the splitter counter. This will force a call to</span></div>
<div class="line"><a name="l01742"></a><span class="lineno"> 1742</span>  <span class="comment">// updateLitScores() the first time we need to find a splitter, and</span></div>
<div class="line"><a name="l01743"></a><span class="lineno"> 1743</span>  <span class="comment">// clean out junk from the previous calls to checkValid().</span></div>
<div class="line"><a name="l01744"></a><span class="lineno"> 1744</span>  <a class="code" href="group__SE__Fast.html#ga52c9c181bcd623a36ab594e0ee16a67e" title="Internal splitter counter for delaying updateLitScores()">d_splitterCount</a>=0;</div>
<div class="line"><a name="l01745"></a><span class="lineno"> 1745</span> </div>
<div class="line"><a name="l01746"></a><span class="lineno"> 1746</span>  <span class="keywordflow">return</span> <a class="code" href="group__SE__Fast.html#gaac7ba666d67d3d4808642c5c7858db95" title="Private helper function for checkValid and restart.">checkValidMain</a>(e2);</div>
<div class="line"><a name="l01747"></a><span class="lineno"> 1747</span> }</div>
<div class="line"><a name="l01748"></a><span class="lineno"> 1748</span> </div>
<div class="line"><a name="l01749"></a><span class="lineno"> 1749</span> </div>
<div class="line"><a name="l01750"></a><span class="lineno"><a class="code" href="group__SE__Fast.html#ga99dd1f1c52ecae319bd0b5a3b689a31d"> 1750</a></span> <a class="code" href="namespaceCVC3.html#a060d21b3207cc3471e24f8dbcff3498b">QueryResult</a> <a class="code" href="group__SE__Fast.html#ga99dd1f1c52ecae319bd0b5a3b689a31d" title="Reruns last check with e as an additional assumption.">SearchEngineFast::restartInternal</a>(<span class="keyword">const</span> <a class="code" href="classCVC3_1_1Expr.html" title="Data structure of expressions in CVC3.">Expr</a>& e)</div>
<div class="line"><a name="l01751"></a><span class="lineno"> 1751</span> {</div>
<div class="line"><a name="l01752"></a><span class="lineno"> 1752</span>  <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(<a class="code" href="group__SE__Fast.html#gad05f577d00e93fefed74eb0c19015090" title="Unprocessed unit conflict clauses.">d_unitConflictClauses</a>.size() == 0, <span class="stringliteral">"restart(): d_unitConflitClauses precondition violated"</span>);</div>
<div class="line"><a name="l01753"></a><span class="lineno"> 1753</span>  <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(<a class="code" href="group__SE__Fast.html#ga4b05dccebac3de019dc112ab3dffc988" title="Queue of derived facts to be sent to DPs.">d_factQueue</a>.empty(), <span class="stringliteral">"restart(): d_factQueue precondition violated"</span>);</div>
<div class="line"><a name="l01754"></a><span class="lineno"> 1754</span> </div>
<div class="line"><a name="l01755"></a><span class="lineno"> 1755</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"search"</span>, <span class="stringliteral">"restart("</span>, e, <span class="stringliteral">") {"</span>);</div>
<div class="line"><a name="l01756"></a><span class="lineno"> 1756</span>  <a class="code" href="debug_8h.html#ad64155edafde9f067f4868817cd04bdf">TRACE_MSG</a>(<span class="stringliteral">"search terse"</span>, <span class="stringliteral">"restart() {"</span>);</div>
<div class="line"><a name="l01757"></a><span class="lineno"> 1757</span> </div>
<div class="line"><a name="l01758"></a><span class="lineno"> 1758</span>  <span class="keywordflow">if</span> (!e.<a class="code" href="group__ExprPkg.html#ga42929221eb172250697b72c28af6de07" title="Get the type. Recursively compute if necessary.">getType</a>().<a class="code" href="classCVC3_1_1Type.html#a38bba404056eadf3c283a67ab2347e02">isBool</a>()) {</div>
<div class="line"><a name="l01759"></a><span class="lineno"> 1759</span>  <span class="keywordflow">throw</span> <a class="code" href="classCVC3_1_1TypecheckException.html">TypecheckException</a></div>
<div class="line"><a name="l01760"></a><span class="lineno"> 1760</span>  (<span class="stringliteral">"argument to restart is a non-boolean expression:\n\n "</span></div>
<div class="line"><a name="l01761"></a><span class="lineno"> 1761</span>  + e.<a class="code" href="group__ExprPkg.html#gaf3028bb1619f8cc69b66ec712e1adb54" title="Print the expression to a string.">toString</a>()</div>
<div class="line"><a name="l01762"></a><span class="lineno"> 1762</span>  + <span class="stringliteral">"\n\nwhich has the following type:\n\n "</span></div>
<div class="line"><a name="l01763"></a><span class="lineno"> 1763</span>  + e.<a class="code" href="group__ExprPkg.html#ga42929221eb172250697b72c28af6de07" title="Get the type. Recursively compute if necessary.">getType</a>().<a class="code" href="classCVC3_1_1Type.html#a2f5ce4b1973ec02b2f2b2eba8ce3cc50">toString</a>());</div>
<div class="line"><a name="l01764"></a><span class="lineno"> 1764</span>  }</div>
<div class="line"><a name="l01765"></a><span class="lineno"> 1765</span> </div>
<div class="line"><a name="l01766"></a><span class="lineno"> 1766</span>  <span class="keywordflow">if</span> (<a class="code" href="group__SE.html#ga640e08e2b051e08f2abdd4111b9a2e71" title="The bottom-most scope for the current call to checkSAT (where conflict clauses are still valid)...">d_bottomScope</a> == 0) {</div>
<div class="line"><a name="l01767"></a><span class="lineno"> 1767</span>  <span class="keywordflow">throw</span> <a class="code" href="classCVC3_1_1Exception.html">Exception</a>(<span class="stringliteral">"Call to restart with no current query"</span>);</div>
<div class="line"><a name="l01768"></a><span class="lineno"> 1768</span>  }</div>
<div class="line"><a name="l01769"></a><span class="lineno"> 1769</span>  <a class="code" href="group__SE.html#ga3772c6af7eac91b9ed7fc278edf5ef90" title="Access to theory reasoning.">d_core</a>-><a class="code" href="classCVC3_1_1TheoryCore.html#a9377f423f4fd59fdac396794363733a6">getCM</a>()-><a class="code" href="classCVC3_1_1ContextManager.html#a0a0dc6f3a5a7ce61cf02566fe31b8691">popto</a>(<a class="code" href="group__SE.html#ga640e08e2b051e08f2abdd4111b9a2e71" title="The bottom-most scope for the current call to checkSAT (where conflict clauses are still valid)...">d_bottomScope</a>);</div>
<div class="line"><a name="l01770"></a><span class="lineno"> 1770</span> </div>
<div class="line"><a name="l01771"></a><span class="lineno"> 1771</span>  <a class="code" href="classCVC3_1_1Expr.html" title="Data structure of expressions in CVC3.">Expr</a> e2 = <a class="code" href="group__SE__Fast.html#gaa8b578a017bcddd578e943add44c2940" title="Theorem which records simplification of the last query.">d_simplifiedThm</a>.<a class="code" href="classCVC3_1_1CDO.html#a818fcacc7b30b0f05347335ab125626c">get</a>().<a class="code" href="classCVC3_1_1Theorem.html#a97d957fcbf9094480851b1d2e5d3729f">getRHS</a>().<a class="code" href="group__ExprPkg.html#gab1ce461dc931af73bf04e88c8d37dcbc">negate</a>();</div>
<div class="line"><a name="l01772"></a><span class="lineno"> 1772</span> </div>
<div class="line"><a name="l01773"></a><span class="lineno"> 1773</span>  <a class="code" href="debug_8h.html#ad64155edafde9f067f4868817cd04bdf">TRACE_MSG</a>(<span class="stringliteral">"search terse"</span>, <span class="stringliteral">"restart: Asserting e: "</span>);</div>
<div class="line"><a name="l01774"></a><span class="lineno"> 1774</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"search"</span>, <span class="stringliteral">"restart: Asserting e: "</span>, e, <span class="stringliteral">""</span>);</div>
<div class="line"><a name="l01775"></a><span class="lineno"> 1775</span>  <span class="keywordflow">if</span>(<a class="code" href="group__SE.html#ga83dfe2d2d85bacf5e4aa10c0320a140b" title="Maintain the list of current assumptions (user asserts and splitters) for getAssumptions().">d_assumptions</a>.<a class="code" href="classCVC3_1_1CDMap.html#af5f700035db0db798c645e36dd0b31bd">count</a>(e) == 0) {</div>
<div class="line"><a name="l01776"></a><span class="lineno"> 1776</span>  <a class="code" href="group__SE.html#ga3772c6af7eac91b9ed7fc278edf5ef90" title="Access to theory reasoning.">d_core</a>-><a class="code" href="classCVC3_1_1TheoryCore.html#aecef2465eb761f7f112ddce77f93d081" title="Add a new assertion to the core from the user or a SAT solver. Do NOT use it in a decision procedure;...">addFact</a>(<a class="code" href="group__SE.html#gaf46a82b16f76c9e97cfe252d4398eac7" title="Generate and add a new assertion to the set of assertions in the current context. This should only be...">newUserAssumption</a>(e));</div>
<div class="line"><a name="l01777"></a><span class="lineno"> 1777</span>  }</div>
<div class="line"><a name="l01778"></a><span class="lineno"> 1778</span> </div>
<div class="line"><a name="l01779"></a><span class="lineno"> 1779</span>  <span class="keywordflow">return</span> <a class="code" href="group__SE__Fast.html#gaac7ba666d67d3d4808642c5c7858db95" title="Private helper function for checkValid and restart.">checkValidMain</a>(e2);</div>
<div class="line"><a name="l01780"></a><span class="lineno"> 1780</span> }</div>
<div class="line"><a name="l01781"></a><span class="lineno"> 1781</span> <span class="comment"></span></div>
<div class="line"><a name="l01782"></a><span class="lineno"> 1782</span> <span class="comment">/*!</span></div>
<div class="line"><a name="l01783"></a><span class="lineno"> 1783</span> <span class="comment"> * The purpose of this method is to mark up the assumption graph of</span></div>
<div class="line"><a name="l01784"></a><span class="lineno"> 1784</span> <span class="comment"> * the FALSE Theorem (conflictThm) for the later UIP analysis. The</span></div>
<div class="line"><a name="l01785"></a><span class="lineno"> 1785</span> <span class="comment"> * required flags for each assumption in the graph are:</span></div>
<div class="line"><a name="l01786"></a><span class="lineno"> 1786</span> <span class="comment"> *</span></div>
<div class="line"><a name="l01787"></a><span class="lineno"> 1787</span> <span class="comment"> * <strong>ExpandFlag:</strong> whether to "expand" the node or not;</span></div>
<div class="line"><a name="l01788"></a><span class="lineno"> 1788</span> <span class="comment"> * that is, whether to consider the current node as a final assumption</span></div>
<div class="line"><a name="l01789"></a><span class="lineno"> 1789</span> <span class="comment"> * (either as a conflict clause literal, or a context assumption from</span></div>
<div class="line"><a name="l01790"></a><span class="lineno"> 1790</span> <span class="comment"> * \f$\Gamma\f$)</span></div>
<div class="line"><a name="l01791"></a><span class="lineno"> 1791</span> <span class="comment"> *</span></div>
<div class="line"><a name="l01792"></a><span class="lineno"> 1792</span> <span class="comment"> * <strong>LitFlag:</strong> the node (actually, its inverse) is a</span></div>
<div class="line"><a name="l01793"></a><span class="lineno"> 1793</span> <span class="comment"> * literal of the conflict clause</span></div>
<div class="line"><a name="l01794"></a><span class="lineno"> 1794</span> <span class="comment"> *</span></div>
<div class="line"><a name="l01795"></a><span class="lineno"> 1795</span> <span class="comment"> * <strong>CachedValue:</strong> the "fanout" count, how many nodes in</span></div>
<div class="line"><a name="l01796"></a><span class="lineno"> 1796</span> <span class="comment"> * the assumption graph are derived from the current node.</span></div>
<div class="line"><a name="l01797"></a><span class="lineno"> 1797</span> <span class="comment"> * </span></div>
<div class="line"><a name="l01798"></a><span class="lineno"> 1798</span> <span class="comment"> * INVARIANTS (after the method returns):</span></div>
<div class="line"><a name="l01799"></a><span class="lineno"> 1799</span> <span class="comment"> *</span></div>
<div class="line"><a name="l01800"></a><span class="lineno"> 1800</span> <span class="comment"> * -# The currect scope is the "true" conflict scope,</span></div>
<div class="line"><a name="l01801"></a><span class="lineno"> 1801</span> <span class="comment"> * i.e. scopeLevel() == conflictThm.getScope()</span></div>
<div class="line"><a name="l01802"></a><span class="lineno"> 1802</span> <span class="comment"> * -# The literals marked with LitFlag (CC literals) are known to the</span></div>
<div class="line"><a name="l01803"></a><span class="lineno"> 1803</span> <span class="comment"> * SAT solver, i.e. their Literal class has a value == 1</span></div>
<div class="line"><a name="l01804"></a><span class="lineno"> 1804</span> <span class="comment"> * -# The only CC literal from the current scope is the latest splitter</span></div>
<div class="line"><a name="l01805"></a><span class="lineno"> 1805</span> <span class="comment"> *</span></div>
<div class="line"><a name="l01806"></a><span class="lineno"> 1806</span> <span class="comment"> * ASSUMPTIONS: </span></div>
<div class="line"><a name="l01807"></a><span class="lineno"> 1807</span> <span class="comment"> * </span></div>
<div class="line"><a name="l01808"></a><span class="lineno"> 1808</span> <span class="comment"> * -# The Theorem scope of an assumption is the same as its Literal scope;</span></div>
<div class="line"><a name="l01809"></a><span class="lineno"> 1809</span> <span class="comment"> * i.e. if thm is a splitter, then </span></div>
<div class="line"><a name="l01810"></a><span class="lineno"> 1810</span> <span class="comment"> * thm.getScope() == newLiteral(thm.getExpr()).getScope()</span></div>
<div class="line"><a name="l01811"></a><span class="lineno"> 1811</span> <span class="comment"> *</span></div>
<div class="line"><a name="l01812"></a><span class="lineno"> 1812</span> <span class="comment"> * Algorithm:</span></div>
<div class="line"><a name="l01813"></a><span class="lineno"> 1813</span> <span class="comment"> * </span></div>
<div class="line"><a name="l01814"></a><span class="lineno"> 1814</span> <span class="comment"> * First, backtrack to the scope level of the conflict. Then,</span></div>
<div class="line"><a name="l01815"></a><span class="lineno"> 1815</span> <span class="comment"> * traverse the implication graph until we either hit a literal known</span></div>
<div class="line"><a name="l01816"></a><span class="lineno"> 1816</span> <span class="comment"> * to the SAT solver at a lower scope:</span></div>
<div class="line"><a name="l01817"></a><span class="lineno"> 1817</span> <span class="comment"> * newLiteral(e).getScope()<scopeLevel(), or a splitter (assumption), or a</span></div>
<div class="line"><a name="l01818"></a><span class="lineno"> 1818</span> <span class="comment"> * fact from the bottom scope. The literals from the first two</span></div>
<div class="line"><a name="l01819"></a><span class="lineno"> 1819</span> <span class="comment"> * categories are marked with LitFlag (they'll comprise the conflict</span></div>
<div class="line"><a name="l01820"></a><span class="lineno"> 1820</span> <span class="comment"> * clause), and the bottom scope facts will be the assumptions in the</span></div>
<div class="line"><a name="l01821"></a><span class="lineno"> 1821</span> <span class="comment"> * conflict clause's theorem.</span></div>
<div class="line"><a name="l01822"></a><span class="lineno"> 1822</span> <span class="comment"> *</span></div>
<div class="line"><a name="l01823"></a><span class="lineno"> 1823</span> <span class="comment"> * The traversed nodes are cached by the .isFlagged() flag, and</span></div>
<div class="line"><a name="l01824"></a><span class="lineno"> 1824</span> <span class="comment"> * subsequent hits only increase the fanout count of the node.</span></div>
<div class="line"><a name="l01825"></a><span class="lineno"> 1825</span> <span class="comment"> *</span></div>
<div class="line"><a name="l01826"></a><span class="lineno"> 1826</span> <span class="comment"> * Notice, that there can only be one literal in the conflict clause</span></div>
<div class="line"><a name="l01827"></a><span class="lineno"> 1827</span> <span class="comment"> * from the current scope. Also, even if some intermediate literals</span></div>
<div class="line"><a name="l01828"></a><span class="lineno"> 1828</span> <span class="comment"> * were delayed by the DPs and reported to the SAT solver at or below</span></div>
<div class="line"><a name="l01829"></a><span class="lineno"> 1829</span> <span class="comment"> * the conflict scope (which may be below their "true" Theorem scope),</span></div>
<div class="line"><a name="l01830"></a><span class="lineno"> 1830</span> <span class="comment"> * they will be skipped, and their assumptions will be used.</span></div>
<div class="line"><a name="l01831"></a><span class="lineno"> 1831</span> <span class="comment"> *</span></div>
<div class="line"><a name="l01832"></a><span class="lineno"> 1832</span> <span class="comment"> * In other words, it is safe to backtrack to the "true" conflict</span></div>
<div class="line"><a name="l01833"></a><span class="lineno"> 1833</span> <span class="comment"> * level, since, in the worst case, we traverse the graph all the way</span></div>
<div class="line"><a name="l01834"></a><span class="lineno"> 1834</span> <span class="comment"> * to the splitters, and make a conflict clause out of those. The</span></div>
<div class="line"><a name="l01835"></a><span class="lineno"> 1835</span> <span class="comment"> * hope is, however, that this wouldn't happen too often.</span></div>
<div class="line"><a name="l01836"></a><span class="lineno"> 1836</span> <span class="comment"> */</span></div>
<div class="line"><a name="l01837"></a><span class="lineno"><a class="code" href="group__SE__Fast.html#gab3f2a42375c5b3875ad18acd47ee124d"> 1837</a></span> <span class="keywordtype">void</span> <a class="code" href="group__SE__Fast.html#gab3f2a42375c5b3875ad18acd47ee124d" title="First pass in conflict analysis; takes a theorem of FALSE.">SearchEngineFast::traceConflict</a>(<span class="keyword">const</span> <a class="code" href="classCVC3_1_1Theorem.html">Theorem</a>& conflictThm) {</div>
<div class="line"><a name="l01838"></a><span class="lineno"> 1838</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"impl graph"</span>, <span class="stringliteral">"traceConflict("</span>, conflictThm.<a class="code" href="classCVC3_1_1Theorem.html#af2b97ae5d270ddf1013bf4f3867a7e5d">getExpr</a>(), <span class="stringliteral">") {"</span>);</div>
<div class="line"><a name="l01839"></a><span class="lineno"> 1839</span>  </div>
<div class="line"><a name="l01840"></a><span class="lineno"> 1840</span>  <span class="comment">// Always process conflict at its true scope or the bottom scope,</span></div>
<div class="line"><a name="l01841"></a><span class="lineno"> 1841</span>  <span class="comment">// whichever is greater.</span></div>
<div class="line"><a name="l01842"></a><span class="lineno"> 1842</span>  <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(conflictThm.<a class="code" href="classCVC3_1_1Theorem.html#a112466d9793abcf97015233ffdc4ec5e">getScope</a>() <= <a class="code" href="group__SE.html#gab267d9f29c30c8e26b5c7bcc4d15306a" title="Return the current scope level (for convenience)">scopeLevel</a>(),</div>
<div class="line"><a name="l01843"></a><span class="lineno"> 1843</span>  <span class="stringliteral">"conflictThm.getScope()="</span>+<a class="code" href="namespaceCVC3.html#af69618103f1f0f2eadada0796a2a940c">int2string</a>(conflictThm.<a class="code" href="classCVC3_1_1Theorem.html#a112466d9793abcf97015233ffdc4ec5e">getScope</a>())</div>
<div class="line"><a name="l01844"></a><span class="lineno"> 1844</span>  +<span class="stringliteral">", scopeLevel()="</span>+<a class="code" href="namespaceCVC3.html#af69618103f1f0f2eadada0796a2a940c">int2string</a>(<a class="code" href="group__SE.html#gab267d9f29c30c8e26b5c7bcc4d15306a" title="Return the current scope level (for convenience)">scopeLevel</a>()));</div>
<div class="line"><a name="l01845"></a><span class="lineno"> 1845</span>  <span class="keywordflow">if</span>(conflictThm.<a class="code" href="classCVC3_1_1Theorem.html#a112466d9793abcf97015233ffdc4ec5e">getScope</a>() < <a class="code" href="group__SE.html#gab267d9f29c30c8e26b5c7bcc4d15306a" title="Return the current scope level (for convenience)">scopeLevel</a>()) {</div>
<div class="line"><a name="l01846"></a><span class="lineno"> 1846</span>  <span class="keywordtype">int</span> scope(conflictThm.<a class="code" href="classCVC3_1_1Theorem.html#a112466d9793abcf97015233ffdc4ec5e">getScope</a>());</div>
<div class="line"><a name="l01847"></a><span class="lineno"> 1847</span>  <span class="keywordflow">if</span>(scope < <a class="code" href="group__SE.html#ga640e08e2b051e08f2abdd4111b9a2e71" title="The bottom-most scope for the current call to checkSAT (where conflict clauses are still valid)...">d_bottomScope</a>) scope = <a class="code" href="group__SE.html#ga640e08e2b051e08f2abdd4111b9a2e71" title="The bottom-most scope for the current call to checkSAT (where conflict clauses are still valid)...">d_bottomScope</a>;</div>
<div class="line"><a name="l01848"></a><span class="lineno"> 1848</span>  <a class="code" href="group__SE__Fast.html#gafa042a51f718c312ea7728f175958e35" title="Decision Engine.">d_decisionEngine</a>-><a class="code" href="group__DE.html#ga90d2e881c4cc004754708ee579682d85" title="Pop to given scope.">popTo</a>(scope);</div>
<div class="line"><a name="l01849"></a><span class="lineno"> 1849</span>  }</div>
<div class="line"><a name="l01850"></a><span class="lineno"> 1850</span> </div>
<div class="line"><a name="l01851"></a><span class="lineno"> 1851</span>  <span class="keywordflow">if</span>(<a class="code" href="group__SE.html#gab267d9f29c30c8e26b5c7bcc4d15306a" title="Return the current scope level (for convenience)">scopeLevel</a>() <= <a class="code" href="group__SE.html#ga640e08e2b051e08f2abdd4111b9a2e71" title="The bottom-most scope for the current call to checkSAT (where conflict clauses are still valid)...">d_bottomScope</a>) {</div>
<div class="line"><a name="l01852"></a><span class="lineno"> 1852</span>  <span class="comment">// This is a top-level conflict, nothing to analyze.</span></div>
<div class="line"><a name="l01853"></a><span class="lineno"> 1853</span>  <a class="code" href="debug_8h.html#ad64155edafde9f067f4868817cd04bdf">TRACE_MSG</a>(<span class="stringliteral">"impl graph"</span>, <span class="stringliteral">"traceConflict[bottom scope] => }"</span>);</div>
<div class="line"><a name="l01854"></a><span class="lineno"> 1854</span>  <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l01855"></a><span class="lineno"> 1855</span>  }</div>
<div class="line"><a name="l01856"></a><span class="lineno"> 1856</span> </div>
<div class="line"><a name="l01857"></a><span class="lineno"> 1857</span>  <span class="comment">// DFS stack</span></div>
<div class="line"><a name="l01858"></a><span class="lineno"> 1858</span>  vector<Theorem> stack;</div>
<div class="line"><a name="l01859"></a><span class="lineno"> 1859</span>  <span class="comment">// Max assumption scope for the contradiction</span></div>
<div class="line"><a name="l01860"></a><span class="lineno"> 1860</span>  <span class="keywordtype">int</span> maxScope(<a class="code" href="group__SE.html#ga640e08e2b051e08f2abdd4111b9a2e71" title="The bottom-most scope for the current call to checkSAT (where conflict clauses are still valid)...">d_bottomScope</a>);</div>
<div class="line"><a name="l01861"></a><span class="lineno"> 1861</span>  <span class="comment">// Collect potential top-level splitters</span></div>
<div class="line"><a name="l01862"></a><span class="lineno"> 1862</span>  <a class="code" href="debug_8h.html#a600cb2d68efe7cc413cccbb5714c7016">IF_DEBUG</a>(vector<Theorem> splitters;)</div>
<div class="line"><a name="l01863"></a><span class="lineno"> 1863</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"impl graph"</span>, <span class="stringliteral">"traceConflict: maxScope = "</span>, maxScope, <span class="stringliteral">""</span>);</div>
<div class="line"><a name="l01864"></a><span class="lineno"> 1864</span> </div>
<div class="line"><a name="l01865"></a><span class="lineno"> 1865</span>  conflictThm.<a class="code" href="classCVC3_1_1Theorem.html#a621ab2150eedc0e3b38d34275ac206cd" title="Clear the flag attribute in all the theorems.">clearAllFlags</a>();</div>
<div class="line"><a name="l01866"></a><span class="lineno"> 1866</span>  conflictThm.<a class="code" href="classCVC3_1_1Theorem.html#a30644e9241516daa6483f5d9c0be4caf" title="Set the "expand" attribute.">setExpandFlag</a>(<span class="keyword">true</span>);</div>
<div class="line"><a name="l01867"></a><span class="lineno"> 1867</span>  conflictThm.<a class="code" href="classCVC3_1_1Theorem.html#a293ebbc3162763fbbeaa9fbd8ea1c657" title="Check if the flag attribute is set.">setCachedValue</a>(0);</div>
<div class="line"><a name="l01868"></a><span class="lineno"> 1868</span> </div>
<div class="line"><a name="l01869"></a><span class="lineno"> 1869</span>  <span class="keyword">const</span> <a class="code" href="classCVC3_1_1Assumptions.html">Assumptions</a>& assump = conflictThm.<a class="code" href="classCVC3_1_1Theorem.html#a5e9ab00a613df15cc02f55edb55a67b3">getAssumptionsRef</a>();</div>
<div class="line"><a name="l01870"></a><span class="lineno"> 1870</span>  <span class="keywordflow">for</span>(<a class="code" href="classCVC3_1_1Assumptions_1_1iterator.html" title="Iterator for the Assumptions: points to class Theorem.">Assumptions::iterator</a> i=assump.<a class="code" href="classCVC3_1_1Assumptions.html#ac3e7d0e1796c83edf687aac063bdba06">begin</a>(),iend=assump.<a class="code" href="classCVC3_1_1Assumptions.html#afc875bbe97e4e2d74a2cdc824f783bfb">end</a>();i!=iend;++i) {</div>
<div class="line"><a name="l01871"></a><span class="lineno"> 1871</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"impl graph"</span>, <span class="stringliteral">"traceConflict: adding "</span>, *i, <span class="stringliteral">""</span>);</div>
<div class="line"><a name="l01872"></a><span class="lineno"> 1872</span>  stack.push_back(*i);</div>
<div class="line"><a name="l01873"></a><span class="lineno"> 1873</span>  }</div>
<div class="line"><a name="l01874"></a><span class="lineno"> 1874</span> </div>
<div class="line"><a name="l01875"></a><span class="lineno"> 1875</span>  <span class="comment">// Do the non-recursive DFS, mark up the assumption graph</span></div>
<div class="line"><a name="l01876"></a><span class="lineno"> 1876</span>  <a class="code" href="debug_8h.html#a600cb2d68efe7cc413cccbb5714c7016">IF_DEBUG</a>(<a class="code" href="classCVC3_1_1Literal.html">Literal</a> maxScopeLit;)</div>
<div class="line"><a name="l01877"></a><span class="lineno"> 1877</span>  <span class="keywordflow">while</span>(stack.size() > 0) {</div>
<div class="line"><a name="l01878"></a><span class="lineno"> 1878</span>  <a class="code" href="classCVC3_1_1Theorem.html">Theorem</a> thm(stack.back());</div>
<div class="line"><a name="l01879"></a><span class="lineno"> 1879</span>  stack.pop_back();</div>
<div class="line"><a name="l01880"></a><span class="lineno"> 1880</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"impl graph"</span>, <span class="stringliteral">"traceConflict: while() { thm = "</span>, thm, <span class="stringliteral">""</span>);</div>
<div class="line"><a name="l01881"></a><span class="lineno"> 1881</span>  <span class="keywordflow">if</span> (thm.isFlagged()) {</div>
<div class="line"><a name="l01882"></a><span class="lineno"> 1882</span>  <span class="comment">// We've seen this theorem before. Update fanout count.</span></div>
<div class="line"><a name="l01883"></a><span class="lineno"> 1883</span>  thm.setCachedValue(thm.getCachedValue() + 1);</div>
<div class="line"><a name="l01884"></a><span class="lineno"> 1884</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"impl graph"</span>, <span class="stringliteral">"Found again: "</span>, thm.getExpr().toString(), <span class="stringliteral">""</span>);</div>
<div class="line"><a name="l01885"></a><span class="lineno"> 1885</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"impl graph"</span>, <span class="stringliteral">"With fanout: "</span>, thm.getCachedValue(), <span class="stringliteral">""</span>);</div>
<div class="line"><a name="l01886"></a><span class="lineno"> 1886</span>  }</div>
<div class="line"><a name="l01887"></a><span class="lineno"> 1887</span>  <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l01888"></a><span class="lineno"> 1888</span>  <span class="comment">// This is a new theorem. Process it.</span></div>
<div class="line"><a name="l01889"></a><span class="lineno"> 1889</span>  thm.setCachedValue(1);</div>
<div class="line"><a name="l01890"></a><span class="lineno"> 1890</span>  thm.setFlag();</div>
<div class="line"><a name="l01891"></a><span class="lineno"> 1891</span>  thm.setLitFlag(<span class="keyword">false</span>); <span class="comment">// Clear this flag (it may be set later)</span></div>
<div class="line"><a name="l01892"></a><span class="lineno"> 1892</span>  <span class="keywordtype">bool</span> expand(<span class="keyword">false</span>);</div>
<div class="line"><a name="l01893"></a><span class="lineno"> 1893</span>  <span class="keywordtype">int</span> scope = thm.getScope();</div>
<div class="line"><a name="l01894"></a><span class="lineno"> 1894</span>  <span class="keywordtype">bool</span> isAssump = thm.isAssump();</div>
<div class="line"><a name="l01895"></a><span class="lineno"> 1895</span> </div>
<div class="line"><a name="l01896"></a><span class="lineno"> 1896</span>  <a class="code" href="debug_8h.html#a600cb2d68efe7cc413cccbb5714c7016">IF_DEBUG</a>({</div>
<div class="line"><a name="l01897"></a><span class="lineno"> 1897</span>  <span class="keywordtype">int</span> s = scope;</div>
<div class="line"><a name="l01898"></a><span class="lineno"> 1898</span>  <span class="keywordflow">if</span>(thm.isAbsLiteral()) {</div>
<div class="line"><a name="l01899"></a><span class="lineno"> 1899</span>  <a class="code" href="classCVC3_1_1Literal.html">Literal</a> l(<a class="code" href="group__SE.html#gaf0dbbb1806723760ab8744e96a8c6657" title="Construct a Literal out of an Expr or return an existing one.">newLiteral</a>(thm.getExpr()));</div>
<div class="line"><a name="l01900"></a><span class="lineno"> 1900</span>  <span class="keywordflow">if</span>(l.<a class="code" href="classCVC3_1_1Literal.html#a48feb6e7cf83b3a59b94ca0e75627d0f">getValue</a>() == 1) s = l.<a class="code" href="classCVC3_1_1Literal.html#a2abe99239ecdf75235e242282cd672f2">getScope</a>();</div>
<div class="line"><a name="l01901"></a><span class="lineno"> 1901</span>  }</div>
<div class="line"><a name="l01902"></a><span class="lineno"> 1902</span>  <span class="comment">// maxScope will be reset: clear the splitters</span></div>
<div class="line"><a name="l01903"></a><span class="lineno"> 1903</span>  <span class="keywordflow">if</span>(s > maxScope) splitters.clear();</div>
<div class="line"><a name="l01904"></a><span class="lineno"> 1904</span>  })</div>
<div class="line"><a name="l01905"></a><span class="lineno"> 1905</span> </div>
<div class="line"><a name="l01906"></a><span class="lineno"> 1906</span>  <span class="keywordflow">if</span>(thm.isAbsLiteral()) {</div>
<div class="line"><a name="l01907"></a><span class="lineno"> 1907</span>  <a class="code" href="classCVC3_1_1Literal.html">Literal</a> l(<a class="code" href="group__SE.html#gaf0dbbb1806723760ab8744e96a8c6657" title="Construct a Literal out of an Expr or return an existing one.">newLiteral</a>(thm.getExpr()));</div>
<div class="line"><a name="l01908"></a><span class="lineno"> 1908</span>  <span class="keywordtype">bool</span> isTrue(l.<a class="code" href="classCVC3_1_1Literal.html#a48feb6e7cf83b3a59b94ca0e75627d0f">getValue</a>()==1);</div>
<div class="line"><a name="l01909"></a><span class="lineno"> 1909</span>  <span class="keywordflow">if</span>(isTrue) scope = l.<a class="code" href="classCVC3_1_1Literal.html#a2abe99239ecdf75235e242282cd672f2">getScope</a>();</div>
<div class="line"><a name="l01910"></a><span class="lineno"> 1910</span>  <span class="keywordflow">if</span>(!isAssump && (!isTrue || scope == <a class="code" href="group__SE.html#gab267d9f29c30c8e26b5c7bcc4d15306a" title="Return the current scope level (for convenience)">scopeLevel</a>()))</div>
<div class="line"><a name="l01911"></a><span class="lineno"> 1911</span>  expand=<span class="keyword">true</span>;</div>
<div class="line"><a name="l01912"></a><span class="lineno"> 1912</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span>(scope > <a class="code" href="group__SE.html#ga640e08e2b051e08f2abdd4111b9a2e71" title="The bottom-most scope for the current call to checkSAT (where conflict clauses are still valid)...">d_bottomScope</a>) {<span class="comment">// Found a literal of a conflict clause</span></div>
<div class="line"><a name="l01913"></a><span class="lineno"> 1913</span>  <a class="code" href="debug_8h.html#a600cb2d68efe7cc413cccbb5714c7016">IF_DEBUG</a>(<span class="keywordflow">if</span>(scope >= maxScope) splitters.push_back(thm);)</div>
<div class="line"><a name="l01914"></a><span class="lineno"> 1914</span>  thm.setLitFlag(<span class="keyword">true</span>);</div>
<div class="line"><a name="l01915"></a><span class="lineno"> 1915</span>  }</div>
<div class="line"><a name="l01916"></a><span class="lineno"> 1916</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l01917"></a><span class="lineno"> 1917</span>  <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(scope <= <a class="code" href="group__SE.html#ga640e08e2b051e08f2abdd4111b9a2e71" title="The bottom-most scope for the current call to checkSAT (where conflict clauses are still valid)...">d_bottomScope</a> || !isAssump,</div>
<div class="line"><a name="l01918"></a><span class="lineno"> 1918</span>  <span class="stringliteral">"SearchEngineFast::traceConflict: thm = "</span></div>
<div class="line"><a name="l01919"></a><span class="lineno"> 1919</span>  +thm.toString());</div>
<div class="line"><a name="l01920"></a><span class="lineno"> 1920</span>  <span class="keywordflow">if</span>(!isAssump && scope > <a class="code" href="group__SE.html#ga640e08e2b051e08f2abdd4111b9a2e71" title="The bottom-most scope for the current call to checkSAT (where conflict clauses are still valid)...">d_bottomScope</a>)</div>
<div class="line"><a name="l01921"></a><span class="lineno"> 1921</span>  expand=<span class="keyword">true</span>;</div>
<div class="line"><a name="l01922"></a><span class="lineno"> 1922</span>  }</div>
<div class="line"><a name="l01923"></a><span class="lineno"> 1923</span> </div>
<div class="line"><a name="l01924"></a><span class="lineno"> 1924</span>  <span class="keywordflow">if</span>(scope > maxScope) {</div>
<div class="line"><a name="l01925"></a><span class="lineno"> 1925</span>  maxScope = scope;</div>
<div class="line"><a name="l01926"></a><span class="lineno"> 1926</span>  <a class="code" href="debug_8h.html#a600cb2d68efe7cc413cccbb5714c7016">IF_DEBUG</a>(maxScopeLit = <a class="code" href="group__SE.html#gaf0dbbb1806723760ab8744e96a8c6657" title="Construct a Literal out of an Expr or return an existing one.">newLiteral</a>(thm.getExpr());)</div>
<div class="line"><a name="l01927"></a><span class="lineno"> 1927</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"impl graph"</span>, <span class="stringliteral">"traceConflict: maxScope = "</span>, maxScope, <span class="stringliteral">""</span>);</div>
<div class="line"><a name="l01928"></a><span class="lineno"> 1928</span>  }</div>
<div class="line"><a name="l01929"></a><span class="lineno"> 1929</span> </div>
<div class="line"><a name="l01930"></a><span class="lineno"> 1930</span>  <span class="keywordflow">if</span>(expand) {</div>
<div class="line"><a name="l01931"></a><span class="lineno"> 1931</span>  <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(!thm.isAssump(),</div>
<div class="line"><a name="l01932"></a><span class="lineno"> 1932</span>  <span class="stringliteral">"traceConflict: thm = "</span>+thm.toString());</div>
<div class="line"><a name="l01933"></a><span class="lineno"> 1933</span>  thm.setExpandFlag(<span class="keyword">true</span>);</div>
<div class="line"><a name="l01934"></a><span class="lineno"> 1934</span>  <span class="keyword">const</span> <a class="code" href="classCVC3_1_1Assumptions.html">Assumptions</a>& assump = thm.getAssumptionsRef();</div>
<div class="line"><a name="l01935"></a><span class="lineno"> 1935</span>  <span class="keywordflow">for</span>(<a class="code" href="classCVC3_1_1Assumptions_1_1iterator.html" title="Iterator for the Assumptions: points to class Theorem.">Assumptions::iterator</a> i=assump.<a class="code" href="classCVC3_1_1Assumptions.html#ac3e7d0e1796c83edf687aac063bdba06">begin</a>(),iend=assump.<a class="code" href="classCVC3_1_1Assumptions.html#afc875bbe97e4e2d74a2cdc824f783bfb">end</a>();</div>
<div class="line"><a name="l01936"></a><span class="lineno"> 1936</span>  i!=iend; ++i) {</div>
<div class="line"><a name="l01937"></a><span class="lineno"> 1937</span>  <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"impl graph"</span>, <span class="stringliteral">"traceConflict: adding "</span>, *i, <span class="stringliteral">""</span>);</div>
<div class="line"><a name="l01938"></a><span class="lineno"> 1938</span>  stack.push_back(*i);</div>
<div class="line"><a name="l01939"></a><span class="lineno"> 1939</span>  }</div>
<div class="line"><a name="l01940"></a><span class="lineno"> 1940</span>  } <span class="keywordflow">else</span></div>
<div class="line"><a name="l01941"></a><span class="lineno"> 1941</span>  thm.setExpandFlag(<span class="keyword">false</span>);</div>
<div class="line"><a name="l01942"></a><span class="lineno"> 1942</span>  }</div>
<div class="line"><a name="l01943"></a><span class="lineno"> 1943</span>  <a class="code" href="debug_8h.html#ad64155edafde9f067f4868817cd04bdf">TRACE_MSG</a>(<span class="stringliteral">"impl graph"</span>, <span class="stringliteral">"traceConflict: end of while() }"</span>);</div>
<div class="line"><a name="l01944"></a><span class="lineno"> 1944</span>  }</div>
<div class="line"><a name="l01945"></a><span class="lineno"> 1945</span>  <a class="code" href="debug_8h.html#a600cb2d68efe7cc413cccbb5714c7016">IF_DEBUG</a>(<span class="keywordflow">if</span>(maxScope != <a class="code" href="group__SE.html#gab267d9f29c30c8e26b5c7bcc4d15306a" title="Return the current scope level (for convenience)">scopeLevel</a>()) conflictThm.<a class="code" href="classCVC3_1_1Theorem.html#ad9da69b34ab2bab4192e5977e5c10498">printDebug</a>();)</div>
<div class="line"><a name="l01946"></a><span class="lineno"> 1946</span>  <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(maxScope == <a class="code" href="group__SE.html#gab267d9f29c30c8e26b5c7bcc4d15306a" title="Return the current scope level (for convenience)">scopeLevel</a>(), <span class="stringliteral">"maxScope="</span>+<a class="code" href="namespaceCVC3.html#af69618103f1f0f2eadada0796a2a940c">int2string</a>(maxScope)</div>
<div class="line"><a name="l01947"></a><span class="lineno"> 1947</span>  +<span class="stringliteral">", scopeLevel()="</span>+<a class="code" href="namespaceCVC3.html#af69618103f1f0f2eadada0796a2a940c">int2string</a>(<a class="code" href="group__SE.html#gab267d9f29c30c8e26b5c7bcc4d15306a" title="Return the current scope level (for convenience)">scopeLevel</a>())</div>
<div class="line"><a name="l01948"></a><span class="lineno"> 1948</span>  +<span class="stringliteral">"\n maxScopeLit = "</span>+maxScopeLit.toString());</div>
<div class="line"><a name="l01949"></a><span class="lineno"> 1949</span>  <a class="code" href="debug_8h.html#a600cb2d68efe7cc413cccbb5714c7016">IF_DEBUG</a>(</div>
<div class="line"><a name="l01950"></a><span class="lineno"> 1950</span>  <span class="keywordflow">if</span>(!(maxScope == <a class="code" href="group__SE.html#ga640e08e2b051e08f2abdd4111b9a2e71" title="The bottom-most scope for the current call to checkSAT (where conflict clauses are still valid)...">d_bottomScope</a> || splitters.size() == 1)) {</div>
<div class="line"><a name="l01951"></a><span class="lineno"> 1951</span>  conflictThm.<a class="code" href="classCVC3_1_1Theorem.html#ad9da69b34ab2bab4192e5977e5c10498">printDebug</a>();</div>
<div class="line"><a name="l01952"></a><span class="lineno"> 1952</span>  ostream& os = debugger.getOS();</div>
<div class="line"><a name="l01953"></a><span class="lineno"> 1953</span>  os << <span class="stringliteral">"\n\nsplitters = ["</span>;</div>
<div class="line"><a name="l01954"></a><span class="lineno"> 1954</span>  <span class="keywordflow">for</span>(<span class="keywordtype">size_t</span> i=0; i<splitters.<a class="code" href="classCVC3_1_1Clause.html#a7cfde40c65fc8eb4f733094fad07dfa1">size</a>(); ++i)</div>
<div class="line"><a name="l01955"></a><span class="lineno"> 1955</span>  os << splitters[i] << <span class="stringliteral">"\n"</span>;</div>
<div class="line"><a name="l01956"></a><span class="lineno"> 1956</span>  os << <span class="stringliteral">"]"</span> << <a class="code" href="group__ExprStream__Manip.html#ga05b0ea7353ec24fa8e7e272d7a7875d8" title="Print the end-of-line.">endl</a>;</div>
<div class="line"><a name="l01957"></a><span class="lineno"> 1957</span>  }</div>
<div class="line"><a name="l01958"></a><span class="lineno"> 1958</span>  )</div>
<div class="line"><a name="l01959"></a><span class="lineno"> 1959</span>  <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(maxScope == <a class="code" href="group__SE.html#ga640e08e2b051e08f2abdd4111b9a2e71" title="The bottom-most scope for the current call to checkSAT (where conflict clauses are still valid)...">d_bottomScope</a> || splitters.size() == 1,</div>
<div class="line"><a name="l01960"></a><span class="lineno"> 1960</span>  <span class="stringliteral">"Wrong number of splitters found at maxScope="</span></div>
<div class="line"><a name="l01961"></a><span class="lineno"> 1961</span>  +<a class="code" href="namespaceCVC3.html#af69618103f1f0f2eadada0796a2a940c">int2string</a>(maxScope)</div>
<div class="line"><a name="l01962"></a><span class="lineno"> 1962</span>  +<span class="stringliteral">": "</span>+<a class="code" href="namespaceCVC3.html#af69618103f1f0f2eadada0796a2a940c">int2string</a>(splitters.size())+<span class="stringliteral">" splitters."</span>);</div>
<div class="line"><a name="l01963"></a><span class="lineno"> 1963</span>  <a class="code" href="group__SE__Fast.html#gab27227ee9e005ab22a9e2a251bc7c6d1" title="The scope of the last conflict.">d_lastConflictScope</a> = maxScope;</div>
<div class="line"><a name="l01964"></a><span class="lineno"> 1964</span>  <a class="code" href="group__SE__Fast.html#gaac9cb2de28ec162fe5ecfe042ad7b101" title="Analyse the conflict, find the UIPs, etc.">analyzeUIPs</a>(conflictThm, maxScope);</div>
<div class="line"><a name="l01965"></a><span class="lineno"> 1965</span>  <a class="code" href="debug_8h.html#ad64155edafde9f067f4868817cd04bdf">TRACE_MSG</a>(<span class="stringliteral">"impl graph"</span>, <span class="stringliteral">"traceConflict => }"</span>);</div>
<div class="line"><a name="l01966"></a><span class="lineno"> 1966</span> }</div>
</div><!-- fragment --></div><!-- contents -->
<!-- start footer part -->
<hr class="footer"/><address class="footer"><small>
Generated on Thu May 16 2013 13:25:14 for CVC3 by  <a href="http://www.doxygen.org/index.html">
<img class="footer" src="doxygen.png" alt="doxygen"/>
</a> 1.8.2
</small></address>
</body>
</html>
