<!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: dpllt.h 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_b0856f6b0d80ccb263b2f415c91f9e17.html">include</a></li> </ul>
</div>
</div><!-- top -->
<div class="header">
<div class="headertitle">
<div class="title">dpllt.h</div> </div>
</div><!--header-->
<div class="contents">
<a href="dpllt_8h.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><span class="comment"></span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment">/*!</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> *\file dpllt.h</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> *\brief Generic DPLL(T) module</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> * Author: Clark Barrett</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> * Created: Mon Dec 12 16:28:08 2005</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> */</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> </div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="preprocessor">#ifndef _cvc3__include__dpllt_h_</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="preprocessor"></span><span class="preprocessor">#define _cvc3__include__dpllt_h_</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="preprocessor">#include "<a class="code" href="queryresult_8h.html" title="enumerated type for result of queries">queryresult.h</a>"</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="preprocessor">#include "<a class="code" href="cnf_8h.html" title="Basic classes for reasoning about formulas in CNF.">cnf.h</a>"</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="preprocessor">#include "<a class="code" href="cnf__manager_8h.html" title="Manager for conversion to and traversal of CNF formulas.">cnf_manager.h</a>"</span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="preprocessor">#include "<a class="code" href="proof_8h.html">proof.h</a>"</span> </div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="preprocessor">#include "<a class="code" href="theory__core_8h.html">theory_core.h</a>"</span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> </div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="keyword">namespace </span>SAT {</div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> </div>
<div class="line"><a name="l00023"></a><span class="lineno"><a class="code" href="classSAT_1_1DPLLT.html"> 23</a></span> <span class="keyword">class </span><a class="code" href="classSAT_1_1DPLLT.html">DPLLT</a> {</div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="keyword">public</span>:</div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> </div>
<div class="line"><a name="l00026"></a><span class="lineno"><a class="code" href="classSAT_1_1DPLLT.html#ac612908684032ffe76ad97f04afd0ca8ab418da559e5bf8e1e7bb7f21dbd1b8ac"> 26</a></span>  <span class="keyword">enum</span> <a class="code" href="classSAT_1_1DPLLT.html#ac612908684032ffe76ad97f04afd0ca8">ConsistentResult</a> {<a class="code" href="classSAT_1_1DPLLT.html#ac612908684032ffe76ad97f04afd0ca8a1dbdf8ba98f0b618f9f4dffcbc947f95">INCONSISTENT</a>, <a class="code" href="classSAT_1_1DPLLT.html#ac612908684032ffe76ad97f04afd0ca8ab418da559e5bf8e1e7bb7f21dbd1b8ac">MAYBE_CONSISTENT</a>, <a class="code" href="classSAT_1_1DPLLT.html#ac612908684032ffe76ad97f04afd0ca8ae8ec5d9933decee81ba80f5bd5cfbed2">CONSISTENT</a> };</div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> </div>
<div class="line"><a name="l00028"></a><span class="lineno"><a class="code" href="classSAT_1_1DPLLT_1_1TheoryAPI.html"> 28</a></span>  <span class="keyword">class </span><a class="code" href="classSAT_1_1DPLLT_1_1TheoryAPI.html">TheoryAPI</a> {</div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>  <span class="keyword">public</span>:</div>
<div class="line"><a name="l00030"></a><span class="lineno"><a class="code" href="classSAT_1_1DPLLT_1_1TheoryAPI.html#a87a03cac4fa22a6211ff22ff2bedefef"> 30</a></span>  <a class="code" href="classSAT_1_1DPLLT_1_1TheoryAPI.html#a87a03cac4fa22a6211ff22ff2bedefef">TheoryAPI</a>() {}</div>
<div class="line"><a name="l00031"></a><span class="lineno"><a class="code" href="classSAT_1_1DPLLT_1_1TheoryAPI.html#a74605aae23f2c5b78c220bd37a02d6d0"> 31</a></span>  <span class="keyword">virtual</span> <a class="code" href="classSAT_1_1DPLLT_1_1TheoryAPI.html#a74605aae23f2c5b78c220bd37a02d6d0">~TheoryAPI</a>() {}</div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="comment"></span></div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="comment"> //! Set a checkpoint for backtracking</span></div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="comment"></span> <span class="keyword">virtual</span> <span class="keywordtype">void</span> <a class="code" href="classSAT_1_1DPLLT_1_1TheoryAPI.html#a771e84ea6308cb7d3f7d02e7858b37db" title="Set a checkpoint for backtracking.">push</a>() = 0;<span class="comment"></span></div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="comment"> //! Restore most recent checkpoint</span></div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="comment"></span> <span class="keyword">virtual</span> <span class="keywordtype">void</span> <a class="code" href="classSAT_1_1DPLLT_1_1TheoryAPI.html#a51a08aab04c2185513676a316aee14b4" title="Restore most recent checkpoint.">pop</a>() = 0;</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"> //! Notify theory when a literal is set to true</span></div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="comment"></span> <span class="keyword">virtual</span> <span class="keywordtype">void</span> <a class="code" href="classSAT_1_1DPLLT_1_1TheoryAPI.html#a3b3ef70567e0298cd3e971fd57d26fa6" title="Notify theory when a literal is set to true.">assertLit</a>(<a class="code" href="classSAT_1_1Lit.html">Lit</a> l) = 0;</div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="comment"></span></div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="comment"> //! Check consistency of the current assignment.</span></div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="comment"></span><span class="comment"> /*! The result is either INCONSISTENT, MAYBE_CONSISTENT, or CONSISTENT</span></div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="comment"> * Most of the time, fullEffort should be false, and the result will most</span></div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="comment"> * likely be either INCONSISTENT or MAYBE_CONSISTENT. To force a full</span></div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="comment"> * check, set fullEffort to true. When fullEffort is set to true, the</span></div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="comment"> * only way the result can be MAYBE_CONSISTENT is if there are new clauses</span></div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="comment"> * to get (via getNewClauses).</span></div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="comment"> * \param cnf should be empty initially. If INCONSISTENT is returned,</span></div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="comment"> * then cnf will contain one or more clauses ruling out the current</span></div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="comment"> * assignment when it returns. Otherwise, cnf is unchanged.</span></div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="comment"> * \param fullEffort true for a full check, false for a fast check</span></div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  <span class="keyword">virtual</span> <a class="code" href="classSAT_1_1DPLLT.html#ac612908684032ffe76ad97f04afd0ca8">ConsistentResult</a> <a class="code" href="classSAT_1_1DPLLT_1_1TheoryAPI.html#a4b3f4a97dbac21236e479a157d866545" title="Check consistency of the current assignment.">checkConsistent</a>(<a class="code" href="classSAT_1_1CNF__Formula.html">CNF_Formula</a>& cnf, <span class="keywordtype">bool</span> fullEffort) = 0;</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="comment"></span></div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span> <span class="comment"> //! Check if the work budget has been exceeded</span></div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="comment"></span><span class="comment"> /*! If true, it means that the engine should quit and return ABORT.</span></div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="comment"> * Otherwise, it should proceed normally. This should be checked regularly.</span></div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  <span class="keyword">virtual</span> <span class="keywordtype">bool</span> <a class="code" href="classSAT_1_1DPLLT_1_1TheoryAPI.html#a6484231750edf5bd9d10d9408c6b5a59" title="Check if the work budget has been exceeded.">outOfResources</a>() = 0;</div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span> <span class="comment"></span></div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="comment"> //! Get a literal that is implied by the current assignment.</span></div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="comment"></span><span class="comment"> /*! This is theory propagation. It can be called repeatedly and returns a</span></div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span> <span class="comment"> * Null literal when there are no more literals to propagate. It should</span></div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span> <span class="comment"> * only be called when the assignment is not known to be inconsistent.</span></div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  <span class="keyword">virtual</span> <a class="code" href="classSAT_1_1Lit.html">Lit</a> <a class="code" href="classSAT_1_1DPLLT_1_1TheoryAPI.html#ad61236a10860b9771e1e09505ab501b5" title="Get a literal that is implied by the current assignment.">getImplication</a>() = 0;</div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span> <span class="comment"></span></div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span> <span class="comment"> //! Get an explanation for a literal that was implied</span></div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span> <span class="comment"></span><span class="comment"> /*! Given a literal l that is true in the current assignment as a result of</span></div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span> <span class="comment"> * an earlier call to getImplication(), this method returns a set of clauses which</span></div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span> <span class="comment"> * justifies the propagation of that literal. The clauses will contain the</span></div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span> <span class="comment"> * literal l as well as other literals that are in the current assignment.</span></div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span> <span class="comment"> * The clauses are such that they would have propagated l via unit</span></div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span> <span class="comment"> * propagation at the time getImplication() was called.</span></div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span> <span class="comment"> * \param l the literal</span></div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span> <span class="comment"> * \param c should be empty initially. */</span></div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  <span class="keyword">virtual</span> <span class="keywordtype">void</span> <a class="code" href="classSAT_1_1DPLLT_1_1TheoryAPI.html#ab7a85a15823cb0771d1e9bb4c0ce0703" title="Get an explanation for a literal that was implied.">getExplanation</a>(<a class="code" href="classSAT_1_1Lit.html">Lit</a> l, <a class="code" href="classSAT_1_1CNF__Formula.html">CNF_Formula</a>& c) = 0;</div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span> <span class="comment"></span></div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span> <span class="comment"> //! Get new clauses from the theory.</span></div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span> <span class="comment"></span><span class="comment"> /*! This is extended theory learning. Returns false if there are no new</span></div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span> <span class="comment"> * clauses to get. Otherwise, returns true and new clauses are added to</span></div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span> <span class="comment"> * cnf. Note that the new clauses (if any) are theory lemmas, i.e. clauses</span></div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span> <span class="comment"> * that are valid in the theory and not dependent on the current</span></div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span> <span class="comment"> * assignment. The clauses may contain new literals as well as literals</span></div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span> <span class="comment"> * that are true in the current assignment.</span></div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span> <span class="comment"> * \param cnf should be empty initially. */</span></div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  <span class="keyword">virtual</span> <span class="keywordtype">bool</span> <a class="code" href="classSAT_1_1DPLLT_1_1TheoryAPI.html#a7d4bf4b22f7e9f19174a4f2813294acd" title="Get new clauses from the theory.">getNewClauses</a>(<a class="code" href="classSAT_1_1CNF__Formula.html">CNF_Formula</a>& cnf) = 0;</div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span> </div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  };</div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span> </div>
<div class="line"><a name="l00092"></a><span class="lineno"><a class="code" href="classSAT_1_1DPLLT_1_1Decider.html"> 92</a></span>  <span class="keyword">class </span><a class="code" href="classSAT_1_1DPLLT_1_1Decider.html">Decider</a> {</div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  <span class="keyword">public</span>:</div>
<div class="line"><a name="l00094"></a><span class="lineno"><a class="code" href="classSAT_1_1DPLLT_1_1Decider.html#ae11de891aaf31257d4d8d391655cd039"> 94</a></span>  <a class="code" href="classSAT_1_1DPLLT_1_1Decider.html#ae11de891aaf31257d4d8d391655cd039">Decider</a>() {}</div>
<div class="line"><a name="l00095"></a><span class="lineno"><a class="code" href="classSAT_1_1DPLLT_1_1Decider.html#a4ce54644af02bd4c93cfd8cb15754cec"> 95</a></span>  <span class="keyword">virtual</span> <a class="code" href="classSAT_1_1DPLLT_1_1Decider.html#a4ce54644af02bd4c93cfd8cb15754cec">~Decider</a>() {}</div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span> <span class="comment"></span></div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span> <span class="comment"> //! Make a decision.</span></div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span> <span class="comment"></span> <span class="comment">/* Returns a NULL Lit if there are no more decisions to make */</span></div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  <span class="keyword">virtual</span> <a class="code" href="classSAT_1_1Lit.html">Lit</a> <a class="code" href="classSAT_1_1DPLLT_1_1Decider.html#a9a15df2a6d6fdd38d9719f5681c068f2" title="Make a decision.">makeDecision</a>() = 0;</div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span> </div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  };</div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span> </div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span> <span class="keyword">protected</span>:</div>
<div class="line"><a name="l00104"></a><span class="lineno"><a class="code" href="classSAT_1_1DPLLT.html#aafa21967afbd30f8c18ebc9f6c37bfa9"> 104</a></span>  <a class="code" href="classSAT_1_1DPLLT_1_1TheoryAPI.html">TheoryAPI</a>* <a class="code" href="classSAT_1_1DPLLT.html#aafa21967afbd30f8c18ebc9f6c37bfa9">d_theoryAPI</a>;</div>
<div class="line"><a name="l00105"></a><span class="lineno"><a class="code" href="classSAT_1_1DPLLT.html#aebea99801d1e6b690feb9610403f1162"> 105</a></span>  <a class="code" href="classSAT_1_1DPLLT_1_1Decider.html">Decider</a>* <a class="code" href="classSAT_1_1DPLLT.html#aebea99801d1e6b690feb9610403f1162">d_decider</a>;</div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span> </div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span> <span class="keyword">public</span>:<span class="comment"></span></div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span> <span class="comment"> //! Constructor</span></div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span> <span class="comment"></span><span class="comment"> /*! The client constructing DPLLT must provide an implementation of</span></div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span> <span class="comment"> * TheoryAPI. It may also optionally provide an implementation of Decider.</span></div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span> <span class="comment"> * If decider is NULL, then the DPLLT class must make its own decisions.</span></div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00113"></a><span class="lineno"><a class="code" href="classSAT_1_1DPLLT.html#abb3fd219fe5a66e70a70fe33b34b45f5"> 113</a></span>  <a class="code" href="classSAT_1_1DPLLT.html#abb3fd219fe5a66e70a70fe33b34b45f5" title="Constructor.">DPLLT</a>(<a class="code" href="classSAT_1_1DPLLT_1_1TheoryAPI.html">TheoryAPI</a>* <a class="code" href="classSAT_1_1DPLLT.html#adec2886c41b3443c264b852bc5f5a84c">theoryAPI</a>, <a class="code" href="classSAT_1_1DPLLT_1_1Decider.html">Decider</a>* <a class="code" href="classSAT_1_1DPLLT.html#add78f8065e68c538dd0914949fb87aef">decider</a>)</div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  : <a class="code" href="classSAT_1_1DPLLT.html#aafa21967afbd30f8c18ebc9f6c37bfa9">d_theoryAPI</a>(theoryAPI), <a class="code" href="classSAT_1_1DPLLT.html#aebea99801d1e6b690feb9610403f1162">d_decider</a>(decider) {}</div>
<div class="line"><a name="l00115"></a><span class="lineno"><a class="code" href="classSAT_1_1DPLLT.html#a59bc482fa7ea2517b7dcccbfd5690420"> 115</a></span>  <span class="keyword">virtual</span> <a class="code" href="classSAT_1_1DPLLT.html#a59bc482fa7ea2517b7dcccbfd5690420">~DPLLT</a>() {}</div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span> </div>
<div class="line"><a name="l00117"></a><span class="lineno"><a class="code" href="classSAT_1_1DPLLT.html#adec2886c41b3443c264b852bc5f5a84c"> 117</a></span>  <a class="code" href="classSAT_1_1DPLLT_1_1TheoryAPI.html">TheoryAPI</a>* <a class="code" href="classSAT_1_1DPLLT.html#adec2886c41b3443c264b852bc5f5a84c">theoryAPI</a>() { <span class="keywordflow">return</span> <a class="code" href="classSAT_1_1DPLLT.html#aafa21967afbd30f8c18ebc9f6c37bfa9">d_theoryAPI</a>; }</div>
<div class="line"><a name="l00118"></a><span class="lineno"><a class="code" href="classSAT_1_1DPLLT.html#add78f8065e68c538dd0914949fb87aef"> 118</a></span>  <a class="code" href="classSAT_1_1DPLLT_1_1Decider.html">Decider</a>* <a class="code" href="classSAT_1_1DPLLT.html#add78f8065e68c538dd0914949fb87aef">decider</a>() { <span class="keywordflow">return</span> <a class="code" href="classSAT_1_1DPLLT.html#aebea99801d1e6b690feb9610403f1162">d_decider</a>; }</div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span> </div>
<div class="line"><a name="l00120"></a><span class="lineno"><a class="code" href="classSAT_1_1DPLLT.html#adbf7530318ac373ba6c82983dc4dd595"> 120</a></span>  <span class="keywordtype">void</span> <a class="code" href="classSAT_1_1DPLLT.html#adbf7530318ac373ba6c82983dc4dd595">setDecider</a>(<a class="code" href="classSAT_1_1DPLLT_1_1Decider.html">Decider</a>* <a class="code" href="classSAT_1_1DPLLT.html#add78f8065e68c538dd0914949fb87aef">decider</a>) { <a class="code" href="classSAT_1_1DPLLT.html#aebea99801d1e6b690feb9610403f1162">d_decider</a> = <a class="code" href="classSAT_1_1DPLLT.html#add78f8065e68c538dd0914949fb87aef">decider</a>; }</div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span> <span class="comment"></span></div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span> <span class="comment"> //! Set a checkpoint for backtracking</span></div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span> <span class="comment"></span><span class="comment"> /*! This should effectively save the current state of the solver. Note that</span></div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span> <span class="comment"> * it should also result in a call to TheoryAPI::push.</span></div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  <span class="keyword">virtual</span> <span class="keywordtype">void</span> <a class="code" href="classSAT_1_1DPLLT.html#aa074d69f0937b579b5f6cfefabadd083" title="Set a checkpoint for backtracking.">push</a>() = 0;</div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span> <span class="comment"></span></div>
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span> <span class="comment"> //! Restore checkpoint</span></div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span> <span class="comment"></span><span class="comment"> /*! This should return the state to what it was immediately before the last</span></div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span> <span class="comment"> * call to push. In particular, if one or more calls to checkSat,</span></div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span> <span class="comment"> * continueCheck, or addAssertion have been made since the last push, these</span></div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span> <span class="comment"> * should be undone. Note also that in this case, a single call to</span></div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span> <span class="comment"> * DPLLT::pop may result in multiple calls to TheoryAPI::pop.</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>  <span class="keyword">virtual</span> <span class="keywordtype">void</span> <a class="code" href="classSAT_1_1DPLLT.html#a59925cdeed3751c4fe4b5d759ebd755c" title="Restore checkpoint.">pop</a>() = 0;</div>
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span> <span class="comment"></span></div>
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span> <span class="comment"> //! Add new clauses to the SAT solver</span></div>
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span> <span class="comment"></span><span class="comment"> /*! This is used to add clauses that form a "context" for the next call to</span></div>
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span> <span class="comment"> * checkSat</span></div>
<div class="line"><a name="l00140"></a><span class="lineno"> 140</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  <span class="keyword">virtual</span> <span class="keywordtype">void</span> <a class="code" href="classSAT_1_1DPLLT.html#aaaa6884de9ebd8b9596e85167e8f9273" title="Add new clauses to the SAT solver.">addAssertion</a>(<span class="keyword">const</span> <a class="code" href="classSAT_1_1CNF__Formula.html">CNF_Formula</a>& cnf) = 0;</div>
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span> </div>
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  <span class="keyword">virtual</span> std::vector<SAT::Lit> <a class="code" href="classSAT_1_1DPLLT.html#a46312fb7854ac482f28c28564f83494d">getCurAssignments</a>() =0 ;</div>
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  <span class="keyword">virtual</span> std::vector<std::vector<SAT::Lit> > <a class="code" href="classSAT_1_1DPLLT.html#ac73560398ae2ae153d318b53d37c7c71">getCurClauses</a>() =0 ;</div>
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span> <span class="comment"></span></div>
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span> <span class="comment"> //! Check the satisfiability of a set of clauses in the current context</span></div>
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span> <span class="comment"></span><span class="comment"> /*! If the result is SATISFIABLE, UNKNOWN, or ABORT, the DPLLT engine should</span></div>
<div class="line"><a name="l00148"></a><span class="lineno"> 148</span> <span class="comment"> * remain in the state it is in until pop() is called. If the result is</span></div>
<div class="line"><a name="l00149"></a><span class="lineno"> 149</span> <span class="comment"> * UNSATISFIABLE, the DPLLT engine should return to the state it was in when</span></div>
<div class="line"><a name="l00150"></a><span class="lineno"> 150</span> <span class="comment"> * called. Note that it should be possible to call checkSat multiple times,</span></div>
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span> <span class="comment"> * even if the result is true (each additional call should use the context</span></div>
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span> <span class="comment"> * left by the previous call).</span></div>
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  <span class="keyword">virtual</span> <a class="code" href="namespaceCVC3.html#a060d21b3207cc3471e24f8dbcff3498b">CVC3::QueryResult</a> <a class="code" href="classSAT_1_1DPLLT.html#a245df0d49bda0e9bdf69a1153e0d76be" title="Check the satisfiability of a set of clauses in the current context.">checkSat</a>(<span class="keyword">const</span> <a class="code" href="classSAT_1_1CNF__Formula.html">CNF_Formula</a>& cnf) = 0;</div>
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span> <span class="comment"></span></div>
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span> <span class="comment"> //! Continue checking the last check with additional constraints</span></div>
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span> <span class="comment"></span><span class="comment"> /*! Should only be called after a previous call to checkSat (or</span></div>
<div class="line"><a name="l00158"></a><span class="lineno"> 158</span> <span class="comment"> * continueCheck) that returned SATISFIABLE. It should add the clauses in</span></div>
<div class="line"><a name="l00159"></a><span class="lineno"> 159</span> <span class="comment"> * cnf to the existing clause database and search for a satisfying</span></div>
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span> <span class="comment"> * assignment. As with checkSat, if the result is not UNSATISFIABLE, the</span></div>
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span> <span class="comment"> * DPLLT engine should remain in the state containing the satisfiable</span></div>
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span> <span class="comment"> * assignment until pop() is called. Similarly, if the result is</span></div>
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span> <span class="comment"> * UNSATISFIABLE, the DPLLT engine should return to the state it was in when</span></div>
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span> <span class="comment"> * checkSat was last called.</span></div>
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  <span class="keyword">virtual</span> <a class="code" href="namespaceCVC3.html#a060d21b3207cc3471e24f8dbcff3498b">CVC3::QueryResult</a> <a class="code" href="classSAT_1_1DPLLT.html#a713db9fe798e2a9be337b8726540a24e" title="Continue checking the last check with additional constraints.">continueCheck</a>(<span class="keyword">const</span> <a class="code" href="classSAT_1_1CNF__Formula.html">CNF_Formula</a>& cnf) = 0;</div>
<div class="line"><a name="l00167"></a><span class="lineno"> 167</span> <span class="comment"></span></div>
<div class="line"><a name="l00168"></a><span class="lineno"> 168</span> <span class="comment"> //! Get value of variable: unassigned, false, or true</span></div>
<div class="line"><a name="l00169"></a><span class="lineno"> 169</span> <span class="comment"></span> <span class="keyword">virtual</span> <a class="code" href="classSAT_1_1Var.html#ac9cf10f19f5f4d86ad539777fd8ca5ae">Var::Val</a> <a class="code" href="classSAT_1_1DPLLT.html#a961364ed0ea77af61dbabd7a3a07670c" title="Get value of variable: unassigned, false, or true.">getValue</a>(<a class="code" href="classSAT_1_1Var.html">Var</a> v) = 0;</div>
<div class="line"><a name="l00170"></a><span class="lineno"> 170</span> <span class="comment"></span></div>
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span> <span class="comment"> //! Get the proof from SAT engine. </span></div>
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span> <span class="comment"></span> <span class="keyword">virtual</span> <a class="code" href="classCVC3_1_1Proof.html">CVC3::Proof</a> <a class="code" href="classSAT_1_1DPLLT.html#ada559a7b19d3dfe82acfa084b8b634ad" title="Get the proof from SAT engine.">getSatProof</a>(<a class="code" href="classSAT_1_1CNF__Manager.html">CNF_Manager</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 ...">CVC3::TheoryCore</a>*) = 0 ; </div>
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span> </div>
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span> };</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> }</div>
<div class="line"><a name="l00177"></a><span class="lineno"> 177</span> </div>
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span> <span class="preprocessor">#endif</span></div>
</div><!-- fragment --></div><!-- contents -->
<!-- start footer part -->
<hr class="footer"/><address class="footer"><small>
Generated on Thu May 16 2013 13:25:13 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>
