<!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"/>
<title>CVC3: dpllt_basic.cpp Source File</title>
<link href="tabs.css" rel="stylesheet" type="text/css"/>
<link href="doxygen.css" rel="stylesheet" type="text/css"/>
</head>
<body>
<!-- Generated by Doxygen 1.7.4 -->
<div id="top">
<div id="titlearea">
<table cellspacing="0" cellpadding="0">
<tbody>
<tr style="height: 56px;">
<td style="padding-left: 0.5em;">
<div id="projectname">CVC3 <span id="projectnumber">2.4.1</span></div>
</td>
</tr>
</tbody>
</table>
</div>
<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 class="header">
<div class="headertitle">
<div class="title">dpllt_basic.cpp</div> </div>
</div>
<div class="contents">
<a href="dpllt__basic_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*****************************************************************************/</span><span class="comment"></span>
<a name="l00002"></a>00002 <span class="comment">/*!</span>
<a name="l00003"></a>00003 <span class="comment"> *\file dpllt_basic.cpp</span>
<a name="l00004"></a>00004 <span class="comment"> *\brief Basic implementation of dpllt module using generic sat solver</span>
<a name="l00005"></a>00005 <span class="comment"> *</span>
<a name="l00006"></a>00006 <span class="comment"> * Author: Clark Barrett</span>
<a name="l00007"></a>00007 <span class="comment"> *</span>
<a name="l00008"></a>00008 <span class="comment"> * Created: Mon Dec 12 19:09:43 2005</span>
<a name="l00009"></a>00009 <span class="comment"> *</span>
<a name="l00010"></a>00010 <span class="comment"> * <hr></span>
<a name="l00011"></a>00011 <span class="comment"> *</span>
<a name="l00012"></a>00012 <span class="comment"> * License to use, copy, modify, sell and/or distribute this software</span>
<a name="l00013"></a>00013 <span class="comment"> * and its documentation for any purpose is hereby granted without</span>
<a name="l00014"></a>00014 <span class="comment"> * royalty, subject to the terms and conditions defined in the \ref</span>
<a name="l00015"></a>00015 <span class="comment"> * LICENSE file provided with this distribution.</span>
<a name="l00016"></a>00016 <span class="comment"> *</span>
<a name="l00017"></a>00017 <span class="comment"> * <hr></span>
<a name="l00018"></a>00018 <span class="comment"> */</span>
<a name="l00019"></a>00019 <span class="comment">/*****************************************************************************/</span>
<a name="l00020"></a>00020
<a name="l00021"></a>00021
<a name="l00022"></a>00022 <span class="preprocessor">#include "<a class="code" href="dpllt__basic_8h.html" title="Basic implementation of dpllt module.">dpllt_basic.h</a>"</span>
<a name="l00023"></a>00023 <span class="preprocessor">#include "<a class="code" href="cnf_8h.html" title="Basic classes for reasoning about formulas in CNF.">cnf.h</a>"</span>
<a name="l00024"></a>00024 <span class="preprocessor">#include "<a class="code" href="sat__api_8h.html">sat_api.h</a>"</span>
<a name="l00025"></a>00025 <span class="preprocessor">#include "<a class="code" href="exception_8h.html">exception.h</a>"</span>
<a name="l00026"></a>00026
<a name="l00027"></a>00027
<a name="l00028"></a>00028 <span class="keyword">using namespace </span>std;
<a name="l00029"></a>00029 <span class="keyword">using namespace </span>CVC3;
<a name="l00030"></a>00030 <span class="keyword">using namespace </span>SAT;
<a name="l00031"></a>00031
<a name="l00032"></a>00032
<a name="l00033"></a>00033 <span class="comment">//int level_ = 0;</span>
<a name="l00034"></a>00034
<a name="l00035"></a><a class="code" href="dpllt__basic_8cpp.html#a94f5febfa6e9f596f28dff5592b701bc">00035</a> <span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code" href="dpllt__basic_8cpp.html#a94f5febfa6e9f596f28dff5592b701bc">SATDLevelHook</a>(<span class="keywordtype">void</span> *cookie, <span class="keywordtype">int</span> change)
<a name="l00036"></a>00036 {
<a name="l00037"></a>00037 <span class="comment">//cout << "backtrack to: " << level_ << " " << change << endl;</span>
<a name="l00038"></a>00038 <span class="comment">//level_ += change;</span>
<a name="l00039"></a>00039 <span class="comment">// cout<<"decision level called"<<endl;</span>
<a name="l00040"></a>00040 <a class="code" href="classSAT_1_1DPLLTBasic.html">DPLLTBasic</a>* db = <span class="keyword">static_cast<</span><a class="code" href="classSAT_1_1DPLLTBasic.html">DPLLTBasic</a>*<span class="keyword">></span>(cookie);
<a name="l00041"></a>00041 <span class="keywordflow">for</span> (; change > 0; change--) {
<a name="l00042"></a>00042 db-><a class="code" href="classSAT_1_1DPLLT.html#adec2886c41b3443c264b852bc5f5a84c">theoryAPI</a>()->push();
<a name="l00043"></a>00043 }
<a name="l00044"></a>00044 <span class="keywordflow">for</span> (; change < 0; change++) {
<a name="l00045"></a>00045 db-><a class="code" href="classSAT_1_1DPLLT.html#adec2886c41b3443c264b852bc5f5a84c">theoryAPI</a>()->pop();
<a name="l00046"></a>00046 }
<a name="l00047"></a>00047 }
<a name="l00048"></a>00048
<a name="l00049"></a>00049
<a name="l00050"></a><a class="code" href="dpllt__basic_8cpp.html#a404b181a9c554aa0076d99c93d963b23">00050</a> <span class="keyword">static</span> <a class="code" href="unionSatSolver_1_1Lit.html">SatSolver::Lit</a> <a class="code" href="dpllt__basic_8cpp.html#a404b181a9c554aa0076d99c93d963b23">SATDecisionHook</a>(<span class="keywordtype">void</span> *cookie, <span class="keywordtype">bool</span> *done)
<a name="l00051"></a>00051 {
<a name="l00052"></a>00052 <span class="comment">// cout<<"sat decision called"<<endl;</span>
<a name="l00053"></a>00053 <a class="code" href="classSAT_1_1DPLLTBasic.html">DPLLTBasic</a>* db = <span class="keyword">static_cast<</span><a class="code" href="classSAT_1_1DPLLTBasic.html">DPLLTBasic</a>*<span class="keyword">></span>(cookie);
<a name="l00054"></a>00054
<a name="l00055"></a>00055 <span class="keywordflow">if</span> (db-><a class="code" href="classSAT_1_1DPLLT.html#adec2886c41b3443c264b852bc5f5a84c">theoryAPI</a>()->outOfResources()) {
<a name="l00056"></a>00056 <span class="comment">// Tell SAT solver to exit with satisfiable result</span>
<a name="l00057"></a>00057 *done = <span class="keyword">true</span>;
<a name="l00058"></a>00058 <span class="keywordflow">return</span> <a class="code" href="unionSatSolver_1_1Lit.html">SatSolver::Lit</a>();
<a name="l00059"></a>00059 }
<a name="l00060"></a>00060
<a name="l00061"></a>00061 <span class="keywordflow">if</span> (!db-><a class="code" href="classSAT_1_1DPLLT.html#add78f8065e68c538dd0914949fb87aef">decider</a>()) {
<a name="l00062"></a>00062 <span class="comment">// Tell SAT solver to make its own choice</span>
<a name="l00063"></a>00063 <span class="keywordflow">if</span> (!*done) <span class="keywordflow">return</span> <a class="code" href="unionSatSolver_1_1Lit.html">SatSolver::Lit</a>();
<a name="l00064"></a>00064 }
<a name="l00065"></a>00065 <span class="keywordflow">else</span> {
<a name="l00066"></a>00066 <a class="code" href="classSAT_1_1Lit.html">Lit</a> lit = db-><a class="code" href="classSAT_1_1DPLLT.html#add78f8065e68c538dd0914949fb87aef">decider</a>()->makeDecision();
<a name="l00067"></a>00067 <span class="keywordflow">if</span> (!lit.<a class="code" href="classSAT_1_1Lit.html#ad5f6236c582c95356d720a7401623f36">isNull</a>()) {
<a name="l00068"></a>00068 <span class="comment">//cout << "Split: " << lit.getVar().getIndex() << endl;</span>
<a name="l00069"></a>00069 <span class="comment">// Tell SAT solver which literal to split on</span>
<a name="l00070"></a>00070 *done = <span class="keyword">false</span>;
<a name="l00071"></a>00071 <span class="keywordflow">return</span> db-><a class="code" href="classSAT_1_1DPLLTBasic.html#a96c27b95e07e062a16beb412f68608a1">cvc2SAT</a>(lit);
<a name="l00072"></a>00072 }
<a name="l00073"></a>00073 }
<a name="l00074"></a>00074
<a name="l00075"></a>00075 <a class="code" href="classSAT_1_1CNF__Formula__Impl.html">CNF_Formula_Impl</a> cnf;
<a name="l00076"></a>00076 <a class="code" href="classSAT_1_1DPLLT.html#ac612908684032ffe76ad97f04afd0ca8">DPLLT::ConsistentResult</a> result;
<a name="l00077"></a>00077 result = db-><a class="code" href="classSAT_1_1DPLLT.html#adec2886c41b3443c264b852bc5f5a84c">theoryAPI</a>()->checkConsistent(cnf, <span class="keyword">true</span>);
<a name="l00078"></a>00078
<a name="l00079"></a>00079 <span class="keywordflow">if</span> (result == DPLLT::MAYBE_CONSISTENT) {
<a name="l00080"></a>00080 <a class="code" href="debug_8h.html#a600cb2d68efe7cc413cccbb5714c7016">IF_DEBUG</a>(<span class="keywordtype">bool</span> added = ) db-><a class="code" href="classSAT_1_1DPLLT.html#adec2886c41b3443c264b852bc5f5a84c">theoryAPI</a>()->getNewClauses(cnf);
<a name="l00081"></a>00081 <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(added, <span class="stringliteral">"Expected new clauses"</span>);
<a name="l00082"></a>00082 db-><a class="code" href="classSAT_1_1DPLLTBasic.html#acc013b97f0368bc1ca43cf374f06521c">addNewClauses</a>(cnf);
<a name="l00083"></a>00083 *done = <span class="keyword">true</span>;
<a name="l00084"></a>00084 <a class="code" href="unionSatSolver_1_1Lit.html">SatSolver::Lit</a> l;
<a name="l00085"></a>00085 l.<a class="code" href="unionSatSolver_1_1Lit.html#a96b4ad90adf8a2d6eee7af2c5b351481">id</a> = 0;
<a name="l00086"></a>00086 <span class="keywordflow">return</span> l;
<a name="l00087"></a>00087 }
<a name="l00088"></a>00088 <span class="keywordflow">else</span> <span class="keywordflow">if</span> (result == DPLLT::INCONSISTENT) {
<a name="l00089"></a>00089 db-><a class="code" href="classSAT_1_1DPLLTBasic.html#acc013b97f0368bc1ca43cf374f06521c">addNewClauses</a>(cnf);
<a name="l00090"></a>00090 }
<a name="l00091"></a>00091
<a name="l00092"></a>00092 <span class="comment">// Tell SAT solver that we are done</span>
<a name="l00093"></a>00093 *done = <span class="keyword">true</span>;
<a name="l00094"></a>00094 <span class="keywordflow">return</span> <a class="code" href="unionSatSolver_1_1Lit.html">SatSolver::Lit</a>();
<a name="l00095"></a>00095 }
<a name="l00096"></a>00096
<a name="l00097"></a>00097
<a name="l00098"></a><a class="code" href="dpllt__basic_8cpp.html#a29427231527df333a516cb975df83d28">00098</a> <span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code" href="dpllt__basic_8cpp.html#a29427231527df333a516cb975df83d28">SATAssignmentHook</a>(<span class="keywordtype">void</span> *cookie, <a class="code" href="unionSatSolver_1_1Var.html">SatSolver::Var</a> var, <span class="keywordtype">int</span> value)
<a name="l00099"></a>00099 {
<a name="l00100"></a>00100 <span class="comment">// cout<<"assignment called"<<endl;</span>
<a name="l00101"></a>00101 <a class="code" href="classSAT_1_1DPLLTBasic.html">DPLLTBasic</a>* db = <span class="keyword">static_cast<</span><a class="code" href="classSAT_1_1DPLLTBasic.html">DPLLTBasic</a>*<span class="keyword">></span>(cookie);
<a name="l00102"></a>00102 <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"DPLL Assign"</span>, var.<a class="code" href="unionSatSolver_1_1Var.html#a0dab20c0e01831dd8c30dd46fbeef533">id</a>, <span class="stringliteral">" := "</span>, value);
<a name="l00103"></a>00103 <span class="keywordflow">if</span> (value == 0)
<a name="l00104"></a>00104 db-><a class="code" href="classSAT_1_1DPLLT.html#adec2886c41b3443c264b852bc5f5a84c">theoryAPI</a>()->assertLit(<a class="code" href="classSAT_1_1Lit.html">Lit</a>(db-><a class="code" href="classSAT_1_1DPLLTBasic.html#a0a36ed4b453c94678f0fbbc380a7d3fd">satSolver</a>()-><a class="code" href="classSatSolver.html#a78a8661d31ba8f3aca7e4c73a84f0bcf">GetVarIndex</a>(var), <span class="keyword">false</span>));
<a name="l00105"></a>00105 <span class="keywordflow">else</span> <span class="keywordflow">if</span> (value == 1)
<a name="l00106"></a>00106 db-><a class="code" href="classSAT_1_1DPLLT.html#adec2886c41b3443c264b852bc5f5a84c">theoryAPI</a>()->assertLit(<a class="code" href="classSAT_1_1Lit.html">Lit</a>(db-><a class="code" href="classSAT_1_1DPLLTBasic.html#a0a36ed4b453c94678f0fbbc380a7d3fd">satSolver</a>()-><a class="code" href="classSatSolver.html#a78a8661d31ba8f3aca7e4c73a84f0bcf">GetVarIndex</a>(var), <span class="keyword">true</span>));
<a name="l00107"></a>00107 <span class="keywordflow">else</span> <span class="keywordflow">return</span>;
<a name="l00108"></a>00108 <a class="code" href="classSAT_1_1CNF__Formula__Impl.html">CNF_Formula_Impl</a> cnf;
<a name="l00109"></a>00109 <a class="code" href="classSAT_1_1DPLLT.html#ac612908684032ffe76ad97f04afd0ca8">DPLLT::ConsistentResult</a> result;
<a name="l00110"></a>00110 result = db-><a class="code" href="classSAT_1_1DPLLT.html#adec2886c41b3443c264b852bc5f5a84c">theoryAPI</a>()->checkConsistent(cnf, <span class="keyword">false</span>);
<a name="l00111"></a>00111 <span class="keywordflow">if</span> (result == DPLLT::INCONSISTENT) {
<a name="l00112"></a>00112 db-><a class="code" href="classSAT_1_1DPLLTBasic.html#acc013b97f0368bc1ca43cf374f06521c">addNewClauses</a>(cnf);
<a name="l00113"></a>00113 }
<a name="l00114"></a>00114 }
<a name="l00115"></a>00115
<a name="l00116"></a>00116
<a name="l00117"></a><a class="code" href="dpllt__basic_8cpp.html#a4f1ae66191e7e8cc326d540076eaeb3a">00117</a> <span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code" href="dpllt__basic_8cpp.html#a4f1ae66191e7e8cc326d540076eaeb3a">SATDeductionHook</a>(<span class="keywordtype">void</span> *cookie)
<a name="l00118"></a>00118 {
<a name="l00119"></a>00119 <span class="comment">// cout<<"deduction called"<<endl;;</span>
<a name="l00120"></a>00120 <a class="code" href="classSAT_1_1DPLLTBasic.html">DPLLTBasic</a>* db = <span class="keyword">static_cast<</span><a class="code" href="classSAT_1_1DPLLTBasic.html">DPLLTBasic</a>*<span class="keyword">></span>(cookie);
<a name="l00121"></a>00121 <a class="code" href="classCVC3_1_1Clause.html" title="A class representing a CNF clause (a smart pointer)">Clause</a> c;
<a name="l00122"></a>00122 <a class="code" href="classSAT_1_1CNF__Formula__Impl.html">CNF_Formula_Impl</a> cnf;
<a name="l00123"></a>00123 <span class="keywordflow">if</span> (db-><a class="code" href="classSAT_1_1DPLLT.html#adec2886c41b3443c264b852bc5f5a84c">theoryAPI</a>()->getNewClauses(cnf)) {
<a name="l00124"></a>00124 db-><a class="code" href="classSAT_1_1DPLLTBasic.html#acc013b97f0368bc1ca43cf374f06521c">addNewClauses</a>(cnf);
<a name="l00125"></a>00125 cnf.<a class="code" href="classSAT_1_1CNF__Formula__Impl.html#a6bc99606944e873ded2b37c954b18170">reset</a>();
<a name="l00126"></a>00126 }
<a name="l00127"></a>00127 <a class="code" href="classSAT_1_1Lit.html">Lit</a> l = db-><a class="code" href="classSAT_1_1DPLLT.html#adec2886c41b3443c264b852bc5f5a84c">theoryAPI</a>()->getImplication();
<a name="l00128"></a>00128 <span class="keywordflow">while</span> (!l.<a class="code" href="classSAT_1_1Lit.html#ad5f6236c582c95356d720a7401623f36">isNull</a>()) {
<a name="l00129"></a>00129 db-><a class="code" href="classSAT_1_1DPLLT.html#adec2886c41b3443c264b852bc5f5a84c">theoryAPI</a>()->getExplanation(l, cnf);
<a name="l00130"></a>00130 db-><a class="code" href="classSAT_1_1DPLLTBasic.html#acc013b97f0368bc1ca43cf374f06521c">addNewClauses</a>(cnf);
<a name="l00131"></a>00131 cnf.<a class="code" href="classSAT_1_1CNF__Formula__Impl.html#a6bc99606944e873ded2b37c954b18170">reset</a>();
<a name="l00132"></a>00132 l = db-><a class="code" href="classSAT_1_1DPLLT.html#adec2886c41b3443c264b852bc5f5a84c">theoryAPI</a>()->getImplication();
<a name="l00133"></a>00133 }
<a name="l00134"></a>00134 }
<a name="l00135"></a>00135
<a name="l00136"></a>00136
<a name="l00137"></a><a class="code" href="classSAT_1_1DPLLTBasic.html#a082ff0d184786dbd60a400320dbc826a">00137</a> <span class="keywordtype">void</span> DPLLTBasic::createManager()
<a name="l00138"></a>00138 {
<a name="l00139"></a>00139 d_mng = <a class="code" href="classSatSolver.html#aad67f64508f2560518d09449cd4e39ee">SatSolver::Create</a>();
<a name="l00140"></a>00140 d_mng->RegisterDLevelHook(<a class="code" href="dpllt__basic_8cpp.html#a94f5febfa6e9f596f28dff5592b701bc">SATDLevelHook</a>, <span class="keyword">this</span>);
<a name="l00141"></a>00141 d_mng->RegisterDecisionHook(<a class="code" href="dpllt__basic_8cpp.html#a404b181a9c554aa0076d99c93d963b23">SATDecisionHook</a>, <span class="keyword">this</span>);
<a name="l00142"></a>00142 d_mng->RegisterAssignmentHook(<a class="code" href="dpllt__basic_8cpp.html#a29427231527df333a516cb975df83d28">SATAssignmentHook</a>, <span class="keyword">this</span>);
<a name="l00143"></a>00143 d_mng->RegisterDeductionHook(<a class="code" href="dpllt__basic_8cpp.html#a4f1ae66191e7e8cc326d540076eaeb3a">SATDeductionHook</a>, <span class="keyword">this</span>);
<a name="l00144"></a>00144 }
<a name="l00145"></a>00145
<a name="l00146"></a>00146
<a name="l00147"></a><a class="code" href="classSAT_1_1DPLLTBasic.html#a744ab3115b0c945843cc1310d06280b3">00147</a> <span class="keywordtype">void</span> DPLLTBasic::generate_CDB (<a class="code" href="classSAT_1_1CNF__Formula__Impl.html">CNF_Formula_Impl</a>& cnf)
<a name="l00148"></a>00148 {
<a name="l00149"></a>00149 <a class="code" href="classSAT_1_1CNF__Formula.html#ac247d01a4cc1e5aab84294cb4c00ddbf">CNF_Formula::const_iterator</a> i, iend;
<a name="l00150"></a>00150 <a class="code" href="classSAT_1_1Clause.html#af739bca890fe8219a7ebda3beefb0474">Clause::const_iterator</a> j, jend;
<a name="l00151"></a>00151 vector<SatSolver::Lit> clause;
<a name="l00152"></a>00152 <span class="keywordflow">if</span> (cnf.<a class="code" href="classSAT_1_1CNF__Formula__Impl.html#acf6148ff29fbfa341e58c134dc77fda0">numVars</a>() > unsigned(d_mng->NumVariables())) {
<a name="l00153"></a>00153 d_mng->AddVariables(cnf.<a class="code" href="classSAT_1_1CNF__Formula__Impl.html#acf6148ff29fbfa341e58c134dc77fda0">numVars</a>() - d_mng->NumVariables());
<a name="l00154"></a>00154 }
<a name="l00155"></a>00155 cnf.<a class="code" href="classSAT_1_1CNF__Formula__Impl.html#ad4e85285d108ed917b748e09c356aa7d">simplify</a>();
<a name="l00156"></a>00156 <span class="keywordflow">for</span> (i = cnf.<a class="code" href="classSAT_1_1CNF__Formula__Impl.html#a91087be2e218a74f381ed2b77e4c79dd">end</a>()-1, iend = cnf.<a class="code" href="classSAT_1_1CNF__Formula__Impl.html#a688bb703f9faac959eed7e9587c13658">begin</a>()-1; i != iend; --i) {
<a name="l00157"></a>00157 <span class="comment">//for (i = cnf.begin(), iend = cnf.end(); i != iend; i++) {</span>
<a name="l00158"></a>00158 <span class="keywordflow">if</span> ((*i).isSatisfied()) <span class="keywordflow">continue</span>;
<a name="l00159"></a>00159 <span class="keywordflow">for</span> (j = (*i).begin(), jend = (*i).end(); j != jend; ++j) {
<a name="l00160"></a>00160 <span class="keywordflow">if</span> (!(*j).isFalse()) clause.push_back(cvc2SAT(*j));
<a name="l00161"></a>00161 }
<a name="l00162"></a>00162 <span class="keywordflow">if</span> (clause.size() != 0) {
<a name="l00163"></a>00163 d_mng->AddClause(clause);
<a name="l00164"></a>00164 clause.clear();
<a name="l00165"></a>00165 }
<a name="l00166"></a>00166 }
<a name="l00167"></a>00167 }
<a name="l00168"></a>00168
<a name="l00169"></a>00169
<a name="l00170"></a><a class="code" href="classSAT_1_1DPLLTBasic.html#aa41a72c436f5faf03128d53bc4e3f9ef">00170</a> <span class="keywordtype">void</span> DPLLTBasic::handle_result(<a class="code" href="classSatSolver.html#a09aef5b79042b31f37d0184667c34d53">SatSolver::SATStatus</a> outcome)
<a name="l00171"></a>00171 {
<a name="l00172"></a>00172 <span class="keyword">const</span> <span class="keywordtype">char</span> * result = <span class="stringliteral">"UNKNOWN"</span>;
<a name="l00173"></a>00173 <span class="keywordflow">switch</span> (outcome) {
<a name="l00174"></a>00174 <span class="keywordflow">case</span> <a class="code" href="classSatSolver.html#a09aef5b79042b31f37d0184667c34d53a8bc290b76f93dd68bdc44d083a7c4e25">SatSolver::SATISFIABLE</a>:
<a name="l00175"></a>00175 <span class="comment">// if (d_printStats) {</span>
<a name="l00176"></a>00176 <span class="comment">// cout << "Instance satisfiable" << endl;</span>
<a name="l00177"></a>00177 <span class="comment">// for (int i=1, sz = d_mng->NumVariables(); i <= sz; ++i) {</span>
<a name="l00178"></a>00178 <span class="comment">// switch(d_mng->GetVarAssignment(d_mng->GetVar(i))) {</span>
<a name="l00179"></a>00179 <span class="comment">// case -1:</span>
<a name="l00180"></a>00180 <span class="comment">// cout <<"("<< i<<")"; break;</span>
<a name="l00181"></a>00181 <span class="comment">// case 0:</span>
<a name="l00182"></a>00182 <span class="comment">// cout << "-" << i; break;</span>
<a name="l00183"></a>00183 <span class="comment">// case 1:</span>
<a name="l00184"></a>00184 <span class="comment">// cout << i ; break;</span>
<a name="l00185"></a>00185 <span class="comment">// default:</span>
<a name="l00186"></a>00186 <span class="comment">// throw Exception("Unknown variable value state");</span>
<a name="l00187"></a>00187 <span class="comment">// }</span>
<a name="l00188"></a>00188 <span class="comment">// cout << " ";</span>
<a name="l00189"></a>00189 <span class="comment">// }</span>
<a name="l00190"></a>00190 <span class="comment">// cout << endl;</span>
<a name="l00191"></a>00191 <span class="comment">// }</span>
<a name="l00192"></a>00192 result = <span class="stringliteral">"SAT"</span>;
<a name="l00193"></a>00193 <span class="keywordflow">break</span>;
<a name="l00194"></a>00194 <span class="keywordflow">case</span> <a class="code" href="classSatSolver.html#a09aef5b79042b31f37d0184667c34d53ad154fc26948177f01812d287e6340734">SatSolver::UNSATISFIABLE</a>:
<a name="l00195"></a>00195 result = <span class="stringliteral">"UNSAT"</span>;
<a name="l00196"></a>00196 <span class="keywordflow">if</span> (d_printStats) cout << <span class="stringliteral">"Instance unsatisfiable"</span> << <a class="code" href="group__ExprStream__Manip.html#ga05b0ea7353ec24fa8e7e272d7a7875d8" title="Print the end-of-line.">endl</a>;
<a name="l00197"></a>00197 <span class="keywordflow">break</span>;
<a name="l00198"></a>00198 <span class="keywordflow">case</span> <a class="code" href="classSatSolver.html#a09aef5b79042b31f37d0184667c34d53a1a1ccd6ae244cce5f08fcdf2d4621fe0">SatSolver::BUDGET_EXCEEDED</a>:
<a name="l00199"></a>00199 result = <span class="stringliteral">"ABORT : TIME OUT"</span>;
<a name="l00200"></a>00200 cout << <span class="stringliteral">"Time out, unable to determine the satisfiablility of the instance"</span>;
<a name="l00201"></a>00201 cout << <a class="code" href="group__ExprStream__Manip.html#ga05b0ea7353ec24fa8e7e272d7a7875d8" title="Print the end-of-line.">endl</a>;
<a name="l00202"></a>00202 <span class="keywordflow">break</span>;
<a name="l00203"></a>00203 <span class="keywordflow">case</span> <a class="code" href="classSatSolver.html#a09aef5b79042b31f37d0184667c34d53a987b167d27ed988755362d6decb025d8">SatSolver::OUT_OF_MEMORY</a>:
<a name="l00204"></a>00204 result = <span class="stringliteral">"ABORT : MEM OUT"</span>;
<a name="l00205"></a>00205 cout << <span class="stringliteral">"Memory out, unable to determing the satisfiablility of the instance"</span>;
<a name="l00206"></a>00206 cout << <a class="code" href="group__ExprStream__Manip.html#ga05b0ea7353ec24fa8e7e272d7a7875d8" title="Print the end-of-line.">endl</a>;
<a name="l00207"></a>00207 <span class="keywordflow">break</span>;
<a name="l00208"></a>00208 <span class="keywordflow">default</span>:
<a name="l00209"></a>00209 <span class="keywordflow">throw</span> <a class="code" href="classCVC3_1_1Exception.html">Exception</a>(<span class="stringliteral">"DPLTBasic::handle_result: Unknown outcome"</span>);
<a name="l00210"></a>00210 }
<a name="l00211"></a>00211 <span class="keywordflow">if</span> (d_printStats) d_mng->PrintStatistics();
<a name="l00212"></a>00212 }
<a name="l00213"></a>00213
<a name="l00214"></a>00214
<a name="l00215"></a><a class="code" href="classSAT_1_1DPLLTBasic.html#a1340aa7926370e1bc90d1da906eb8e79">00215</a> <span class="keywordtype">void</span> DPLLTBasic::verify_solution()
<a name="l00216"></a>00216 {
<a name="l00217"></a>00217 <span class="comment">// Used to check that all clauses are true, but our decision maker</span>
<a name="l00218"></a>00218 <span class="comment">// may ignore some clauses that are no longer relevant, so now we check to</span>
<a name="l00219"></a>00219 <span class="comment">// make sure no clause is false.</span>
<a name="l00220"></a>00220 <span class="keywordflow">for</span> (<a class="code" href="unionSatSolver_1_1Clause.html">SatSolver::Clause</a> cl = d_mng->GetFirstClause(); !cl.<a class="code" href="unionSatSolver_1_1Clause.html#a0909ff4fdf3c02d96c2017d868129cc3">IsNull</a>();
<a name="l00221"></a>00221 cl = d_mng->GetNextClause(cl)) {
<a name="l00222"></a>00222 vector<SatSolver::Lit> lits;
<a name="l00223"></a>00223 d_mng->GetClauseLits(cl, &lits);
<a name="l00224"></a>00224 <span class="keywordflow">for</span> (; lits.size() != 0;) {
<a name="l00225"></a>00225 <a class="code" href="unionSatSolver_1_1Lit.html">SatSolver::Lit</a> lit = lits.back();
<a name="l00226"></a>00226 <a class="code" href="unionSatSolver_1_1Var.html">SatSolver::Var</a> var = d_mng->GetVarFromLit(lit);
<a name="l00227"></a>00227 <span class="keywordtype">int</span> sign = d_mng->GetPhaseFromLit(lit);
<a name="l00228"></a>00228 <span class="keywordtype">int</span> var_value = d_mng->GetVarAssignment(var);
<a name="l00229"></a>00229 <span class="keywordflow">if</span>( (var_value == 1 && sign == 0) ||
<a name="l00230"></a>00230 (var_value == 0 && sign == 1) ||
<a name="l00231"></a>00231 (var_value == -1) ) <span class="keywordflow">break</span>;
<a name="l00232"></a>00232 lits.pop_back();
<a name="l00233"></a>00233 }
<a name="l00234"></a>00234 <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(lits.size() != 0, <span class="stringliteral">"DPLLTBasic::verify_solution failed"</span>);
<a name="l00235"></a>00235 }
<a name="l00236"></a>00236 }
<a name="l00237"></a>00237
<a name="l00238"></a>00238
<a name="l00239"></a><a class="code" href="classSAT_1_1DPLLTBasic.html#a11ff82c567a310525206ba0260fbde5e">00239</a> DPLLTBasic::DPLLTBasic(<a class="code" href="classSAT_1_1DPLLT_1_1TheoryAPI.html">TheoryAPI</a>* theoryAPI, <a class="code" href="classSAT_1_1DPLLT_1_1Decider.html">Decider</a>* decider, <a class="code" href="classCVC3_1_1ContextManager.html" title="Manager for multiple contexts. Also holds current context.">ContextManager</a>* cm,
<a name="l00240"></a>00240 <span class="keywordtype">bool</span> printStats)
<a name="l00241"></a>00241 : <a class="code" href="classSAT_1_1DPLLT.html">DPLLT</a>(theoryAPI, decider), d_cm(cm), d_ready(true),
<a name="l00242"></a>00242 d_printStats(printStats),
<a name="l00243"></a>00243 d_pushLevel(cm->getCurrentContext(), 0),
<a name="l00244"></a>00244 d_readyPrev(cm->getCurrentContext(), true),
<a name="l00245"></a>00245 d_prevStackSize(cm->getCurrentContext(), 0),
<a name="l00246"></a>00246 d_prevAStackSize(cm->getCurrentContext(), 0)
<a name="l00247"></a>00247 {
<a name="l00248"></a>00248 <a class="code" href="classSAT_1_1DPLLTBasic.html#a082ff0d184786dbd60a400320dbc826a">createManager</a>();
<a name="l00249"></a>00249 <a class="code" href="classSAT_1_1DPLLTBasic.html#a191c0c9c76c2ab5a37038c32a7c6ab58">d_cnf</a> = <span class="keyword">new</span> <a class="code" href="classSAT_1_1CNF__Formula__Impl.html">CNF_Formula_Impl</a>();
<a name="l00250"></a>00250 <a class="code" href="classSAT_1_1DPLLTBasic.html#a6032bad91260ee1c03ed4553425d6cf9">d_assertions</a> = <span class="keyword">new</span> <a class="code" href="classSAT_1_1CD__CNF__Formula.html">CD_CNF_Formula</a>(<a class="code" href="classSAT_1_1DPLLTBasic.html#a9e8593063e800cb17793629543493624">d_cm</a>-><a class="code" href="classCVC3_1_1ContextManager.html#a66a7d900301c1459de90b048623d9297">getCurrentContext</a>());
<a name="l00251"></a>00251 }
<a name="l00252"></a>00252
<a name="l00253"></a>00253
<a name="l00254"></a><a class="code" href="classSAT_1_1DPLLTBasic.html#a080afc4433840fd154465360ec97ca2b">00254</a> <a class="code" href="classSAT_1_1DPLLTBasic.html#a080afc4433840fd154465360ec97ca2b">DPLLTBasic::~DPLLTBasic</a>()
<a name="l00255"></a>00255 {
<a name="l00256"></a>00256 <span class="keywordflow">if</span> (<a class="code" href="classSAT_1_1DPLLTBasic.html#a6032bad91260ee1c03ed4553425d6cf9">d_assertions</a>) <span class="keyword">delete</span> <a class="code" href="classSAT_1_1DPLLTBasic.html#a6032bad91260ee1c03ed4553425d6cf9">d_assertions</a>;
<a name="l00257"></a>00257 <span class="keywordflow">if</span> (<a class="code" href="classSAT_1_1DPLLTBasic.html#a191c0c9c76c2ab5a37038c32a7c6ab58">d_cnf</a>) <span class="keyword">delete</span> <a class="code" href="classSAT_1_1DPLLTBasic.html#a191c0c9c76c2ab5a37038c32a7c6ab58">d_cnf</a>;
<a name="l00258"></a>00258 <span class="keywordflow">if</span> (<a class="code" href="classSAT_1_1DPLLTBasic.html#a21ec19cee9ab93b7cda66d209dd6e676">d_mng</a>) <span class="keyword">delete</span> <a class="code" href="classSAT_1_1DPLLTBasic.html#a21ec19cee9ab93b7cda66d209dd6e676">d_mng</a>;
<a name="l00259"></a>00259 <span class="keywordflow">while</span> (<a class="code" href="classSAT_1_1DPLLTBasic.html#a4194dcc23968652060be41902ca5b376">d_assertionsStack</a>.size() > 0) {
<a name="l00260"></a>00260 <a class="code" href="classSAT_1_1DPLLTBasic.html#a6032bad91260ee1c03ed4553425d6cf9">d_assertions</a> = <a class="code" href="classSAT_1_1DPLLTBasic.html#a4194dcc23968652060be41902ca5b376">d_assertionsStack</a>.back();
<a name="l00261"></a>00261 <a class="code" href="classSAT_1_1DPLLTBasic.html#a4194dcc23968652060be41902ca5b376">d_assertionsStack</a>.pop_back();
<a name="l00262"></a>00262 <span class="keyword">delete</span> <a class="code" href="classSAT_1_1DPLLTBasic.html#a6032bad91260ee1c03ed4553425d6cf9">d_assertions</a>;
<a name="l00263"></a>00263 }
<a name="l00264"></a>00264 <span class="keywordflow">while</span> (<a class="code" href="classSAT_1_1DPLLTBasic.html#aba339d2d7e2f5ed7bf1367e497e73087">d_mngStack</a>.size() > 0) {
<a name="l00265"></a>00265 <a class="code" href="classSAT_1_1DPLLTBasic.html#a21ec19cee9ab93b7cda66d209dd6e676">d_mng</a> = <a class="code" href="classSAT_1_1DPLLTBasic.html#aba339d2d7e2f5ed7bf1367e497e73087">d_mngStack</a>.back();
<a name="l00266"></a>00266 <a class="code" href="classSAT_1_1DPLLTBasic.html#aba339d2d7e2f5ed7bf1367e497e73087">d_mngStack</a>.pop_back();
<a name="l00267"></a>00267 <span class="keyword">delete</span> <a class="code" href="classSAT_1_1DPLLTBasic.html#a21ec19cee9ab93b7cda66d209dd6e676">d_mng</a>;
<a name="l00268"></a>00268 <a class="code" href="classSAT_1_1DPLLTBasic.html#a191c0c9c76c2ab5a37038c32a7c6ab58">d_cnf</a> = <a class="code" href="classSAT_1_1DPLLTBasic.html#a423ff42fd5ccad2be5f8dd97654e9a81">d_cnfStack</a>.back();
<a name="l00269"></a>00269 <a class="code" href="classSAT_1_1DPLLTBasic.html#a423ff42fd5ccad2be5f8dd97654e9a81">d_cnfStack</a>.pop_back();
<a name="l00270"></a>00270 <span class="keyword">delete</span> <a class="code" href="classSAT_1_1DPLLTBasic.html#a191c0c9c76c2ab5a37038c32a7c6ab58">d_cnf</a>;
<a name="l00271"></a>00271 }
<a name="l00272"></a>00272 }
<a name="l00273"></a>00273
<a name="l00274"></a>00274
<a name="l00275"></a><a class="code" href="classSAT_1_1DPLLTBasic.html#abfe1c680e074676f0f291125e7eb150e">00275</a> <span class="keywordtype">void</span> <a class="code" href="classSAT_1_1DPLLTBasic.html#abfe1c680e074676f0f291125e7eb150e">DPLLTBasic::addNewClause</a>(<span class="keyword">const</span> <a class="code" href="classSAT_1_1Clause.html">Clause</a>& c)
<a name="l00276"></a>00276 {
<a name="l00277"></a>00277 <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(c.<a class="code" href="classSAT_1_1Clause.html#a3c64729606d93f16b66f58d62ef253d5">size</a>() > 0, <span class="stringliteral">"Expected non-empty clause"</span>);
<a name="l00278"></a>00278 <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(c.<a class="code" href="classSAT_1_1Clause.html#a88bfd90868e75a24feffc7f428e30369">getMaxVar</a>() <= unsigned(<a class="code" href="classSAT_1_1DPLLTBasic.html#a21ec19cee9ab93b7cda66d209dd6e676">d_mng</a>-><a class="code" href="classSatSolver.html#a75ac3919b9d2794bd2443e32bb1f29fd">NumVariables</a>()),
<a name="l00279"></a>00279 <span class="stringliteral">"Expected no new variables"</span>);
<a name="l00280"></a>00280 vector<SatSolver::Lit> lits;
<a name="l00281"></a>00281 <span class="keywordflow">for</span> (<a class="code" href="classSAT_1_1Clause.html#af739bca890fe8219a7ebda3beefb0474">Clause::const_iterator</a> i = c.<a class="code" href="classSAT_1_1Clause.html#a6d0f568c60e06a1c59c2bf37788ff778">begin</a>(), iend = c.<a class="code" href="classSAT_1_1Clause.html#a38094b009b923d08ca9b1a8f517b591e">end</a>(); i < iend; ++i) {
<a name="l00282"></a>00282 <span class="keywordflow">if</span> (!(*i).isFalse()) lits.push_back(<a class="code" href="classSAT_1_1DPLLTBasic.html#a96c27b95e07e062a16beb412f68608a1">cvc2SAT</a>(*i));
<a name="l00283"></a>00283 }
<a name="l00284"></a>00284 <a class="code" href="classSAT_1_1DPLLTBasic.html#a0a36ed4b453c94678f0fbbc380a7d3fd">satSolver</a>()-><a class="code" href="classSatSolver.html#a1fb269f00fd9da8242e2bad01967f097">AddClause</a>(lits);
<a name="l00285"></a>00285 (*d_cnf) += c;
<a name="l00286"></a>00286 }
<a name="l00287"></a>00287
<a name="l00288"></a>00288
<a name="l00289"></a><a class="code" href="classSAT_1_1DPLLTBasic.html#acc013b97f0368bc1ca43cf374f06521c">00289</a> <span class="keywordtype">void</span> <a class="code" href="classSAT_1_1DPLLTBasic.html#acc013b97f0368bc1ca43cf374f06521c">DPLLTBasic::addNewClauses</a>(<a class="code" href="classSAT_1_1CNF__Formula__Impl.html">CNF_Formula_Impl</a>& cnf)
<a name="l00290"></a>00290 {
<a name="l00291"></a>00291 <a class="code" href="classSAT_1_1CNF__Formula.html#ac247d01a4cc1e5aab84294cb4c00ddbf">CNF_Formula::const_iterator</a> i, iend;
<a name="l00292"></a>00292 <a class="code" href="classSAT_1_1Clause.html#af739bca890fe8219a7ebda3beefb0474">Clause::const_iterator</a> j, jend;
<a name="l00293"></a>00293 vector<SatSolver::Lit> clause;
<a name="l00294"></a>00294 <span class="keywordflow">if</span> (cnf.<a class="code" href="classSAT_1_1CNF__Formula__Impl.html#acf6148ff29fbfa341e58c134dc77fda0">numVars</a>() > unsigned(<a class="code" href="classSAT_1_1DPLLTBasic.html#a21ec19cee9ab93b7cda66d209dd6e676">d_mng</a>-><a class="code" href="classSatSolver.html#a75ac3919b9d2794bd2443e32bb1f29fd">NumVariables</a>())) {
<a name="l00295"></a>00295 <a class="code" href="classSAT_1_1DPLLTBasic.html#a21ec19cee9ab93b7cda66d209dd6e676">d_mng</a>-><a class="code" href="classSatSolver.html#acf0e4f44556b7cfcea37100f92962fee">AddVariables</a>(cnf.<a class="code" href="classSAT_1_1CNF__Formula__Impl.html#acf6148ff29fbfa341e58c134dc77fda0">numVars</a>() - <a class="code" href="classSAT_1_1DPLLTBasic.html#a21ec19cee9ab93b7cda66d209dd6e676">d_mng</a>-><a class="code" href="classSatSolver.html#a75ac3919b9d2794bd2443e32bb1f29fd">NumVariables</a>());
<a name="l00296"></a>00296 }
<a name="l00297"></a>00297 cnf.<a class="code" href="classSAT_1_1CNF__Formula__Impl.html#ad4e85285d108ed917b748e09c356aa7d">simplify</a>();
<a name="l00298"></a>00298 <span class="keywordflow">for</span> (i = cnf.<a class="code" href="classSAT_1_1CNF__Formula__Impl.html#a91087be2e218a74f381ed2b77e4c79dd">end</a>()-1, iend = cnf.<a class="code" href="classSAT_1_1CNF__Formula__Impl.html#a688bb703f9faac959eed7e9587c13658">begin</a>()-1; i != iend; --i) {
<a name="l00299"></a>00299 <span class="comment">//for (i = cnf.begin(), iend = cnf.end(); i != iend; i++) {</span>
<a name="l00300"></a>00300 <span class="keywordflow">if</span> ((*i).isSatisfied()) <span class="keywordflow">continue</span>;
<a name="l00301"></a>00301 <span class="keywordflow">for</span> (j = (*i).begin(), jend = (*i).end(); j != jend; ++j) {
<a name="l00302"></a>00302 <span class="keywordflow">if</span> (!(*j).isFalse()) clause.push_back(<a class="code" href="classSAT_1_1DPLLTBasic.html#a96c27b95e07e062a16beb412f68608a1">cvc2SAT</a>(*j));
<a name="l00303"></a>00303 }
<a name="l00304"></a>00304 <span class="keywordflow">if</span> (clause.size() != 0) {
<a name="l00305"></a>00305 <a class="code" href="classSAT_1_1DPLLTBasic.html#a21ec19cee9ab93b7cda66d209dd6e676">d_mng</a>-><a class="code" href="classSatSolver.html#a1fb269f00fd9da8242e2bad01967f097">AddClause</a>(clause);
<a name="l00306"></a>00306 clause.<a class="code" href="classSAT_1_1Clause.html#a7c3a264e08e022cd1b7526b62a55302d">clear</a>();
<a name="l00307"></a>00307 }
<a name="l00308"></a>00308 }
<a name="l00309"></a>00309 <a class="code" href="classSAT_1_1DPLLTBasic.html#a744ab3115b0c945843cc1310d06280b3">generate_CDB</a>(cnf);
<a name="l00310"></a>00310 (*d_cnf) += cnf;
<a name="l00311"></a>00311 }
<a name="l00312"></a>00312
<a name="l00313"></a>00313
<a name="l00314"></a><a class="code" href="classSAT_1_1DPLLTBasic.html#a8c8f7e178849aead6754e44e3e63dc0c">00314</a> <span class="keywordtype">void</span> <a class="code" href="classSAT_1_1DPLLTBasic.html#a8c8f7e178849aead6754e44e3e63dc0c" title="Set a checkpoint for backtracking.">DPLLTBasic::push</a>()
<a name="l00315"></a>00315 {
<a name="l00316"></a>00316 <a class="code" href="classSAT_1_1DPLLT.html#aafa21967afbd30f8c18ebc9f6c37bfa9">d_theoryAPI</a>-><a class="code" href="classSAT_1_1DPLLT_1_1TheoryAPI.html#a771e84ea6308cb7d3f7d02e7858b37db" title="Set a checkpoint for backtracking.">push</a>();
<a name="l00317"></a>00317 <a class="code" href="classSAT_1_1DPLLTBasic.html#ac1e928276774bc77063ee05aa2ceb078">d_pushLevel</a> = <a class="code" href="classSAT_1_1DPLLTBasic.html#ac1e928276774bc77063ee05aa2ceb078">d_pushLevel</a> + 1;
<a name="l00318"></a>00318 <a class="code" href="classSAT_1_1DPLLTBasic.html#ada4aa8a05927fc1ea334edea0b5f8fd3">d_prevStackSize</a> = <a class="code" href="classSAT_1_1DPLLTBasic.html#aba339d2d7e2f5ed7bf1367e497e73087">d_mngStack</a>.size();
<a name="l00319"></a>00319 <a class="code" href="classSAT_1_1DPLLTBasic.html#a0bd6e3a5262667eed68fd59cf6c39551">d_prevAStackSize</a> = <a class="code" href="classSAT_1_1DPLLTBasic.html#a4194dcc23968652060be41902ca5b376">d_assertionsStack</a>.size();
<a name="l00320"></a>00320 <a class="code" href="classSAT_1_1DPLLTBasic.html#a04bf3fdf12271b364b22d40dc352f634">d_readyPrev</a> = <a class="code" href="classSAT_1_1DPLLTBasic.html#af53a2ee63b573d7ddd70395cc58fab6a">d_ready</a>;
<a name="l00321"></a>00321 }
<a name="l00322"></a>00322
<a name="l00323"></a>00323
<a name="l00324"></a><a class="code" href="classSAT_1_1DPLLTBasic.html#aff5dbd3c2a47f003d7b388a8b673cc85">00324</a> <span class="keywordtype">void</span> <a class="code" href="classSAT_1_1DPLLTBasic.html#aff5dbd3c2a47f003d7b388a8b673cc85" title="Restore checkpoint.">DPLLTBasic::pop</a>()
<a name="l00325"></a>00325 {
<a name="l00326"></a>00326 <span class="keywordtype">unsigned</span> pushLevel = <a class="code" href="classSAT_1_1DPLLTBasic.html#ac1e928276774bc77063ee05aa2ceb078">d_pushLevel</a>;
<a name="l00327"></a>00327 <span class="keywordtype">unsigned</span> prevStackSize = <a class="code" href="classSAT_1_1DPLLTBasic.html#ada4aa8a05927fc1ea334edea0b5f8fd3">d_prevStackSize</a>;
<a name="l00328"></a>00328 <span class="keywordtype">unsigned</span> prevAStackSize = <a class="code" href="classSAT_1_1DPLLTBasic.html#a0bd6e3a5262667eed68fd59cf6c39551">d_prevAStackSize</a>;
<a name="l00329"></a>00329 <span class="keywordtype">bool</span> readyPrev = <a class="code" href="classSAT_1_1DPLLTBasic.html#a04bf3fdf12271b364b22d40dc352f634">d_readyPrev</a>;
<a name="l00330"></a>00330
<a name="l00331"></a>00331 <span class="keywordflow">while</span> (<a class="code" href="classSAT_1_1DPLLTBasic.html#a4194dcc23968652060be41902ca5b376">d_assertionsStack</a>.size() > prevAStackSize) {
<a name="l00332"></a>00332 <span class="keyword">delete</span> <a class="code" href="classSAT_1_1DPLLTBasic.html#a6032bad91260ee1c03ed4553425d6cf9">d_assertions</a>;
<a name="l00333"></a>00333 <a class="code" href="classSAT_1_1DPLLTBasic.html#a6032bad91260ee1c03ed4553425d6cf9">d_assertions</a> = <a class="code" href="classSAT_1_1DPLLTBasic.html#a4194dcc23968652060be41902ca5b376">d_assertionsStack</a>.back();
<a name="l00334"></a>00334 <a class="code" href="classSAT_1_1DPLLTBasic.html#a4194dcc23968652060be41902ca5b376">d_assertionsStack</a>.pop_back();
<a name="l00335"></a>00335 }
<a name="l00336"></a>00336
<a name="l00337"></a>00337 <span class="keywordflow">while</span> (<a class="code" href="classSAT_1_1DPLLTBasic.html#aba339d2d7e2f5ed7bf1367e497e73087">d_mngStack</a>.size() > prevStackSize) {
<a name="l00338"></a>00338 <span class="keyword">delete</span> <a class="code" href="classSAT_1_1DPLLTBasic.html#a21ec19cee9ab93b7cda66d209dd6e676">d_mng</a>;
<a name="l00339"></a>00339 <span class="keyword">delete</span> <a class="code" href="classSAT_1_1DPLLTBasic.html#a191c0c9c76c2ab5a37038c32a7c6ab58">d_cnf</a>;
<a name="l00340"></a>00340 <a class="code" href="classSAT_1_1DPLLTBasic.html#a21ec19cee9ab93b7cda66d209dd6e676">d_mng</a> = <a class="code" href="classSAT_1_1DPLLTBasic.html#aba339d2d7e2f5ed7bf1367e497e73087">d_mngStack</a>.back();
<a name="l00341"></a>00341 <a class="code" href="classSAT_1_1DPLLTBasic.html#aba339d2d7e2f5ed7bf1367e497e73087">d_mngStack</a>.pop_back();
<a name="l00342"></a>00342 <a class="code" href="classSAT_1_1DPLLTBasic.html#a191c0c9c76c2ab5a37038c32a7c6ab58">d_cnf</a> = <a class="code" href="classSAT_1_1DPLLTBasic.html#a423ff42fd5ccad2be5f8dd97654e9a81">d_cnfStack</a>.back();
<a name="l00343"></a>00343 <a class="code" href="classSAT_1_1DPLLTBasic.html#a423ff42fd5ccad2be5f8dd97654e9a81">d_cnfStack</a>.pop_back();
<a name="l00344"></a>00344 <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(<a class="code" href="classSAT_1_1DPLLTBasic.html#aba339d2d7e2f5ed7bf1367e497e73087">d_mngStack</a>.size() == <a class="code" href="classSAT_1_1DPLLTBasic.html#a423ff42fd5ccad2be5f8dd97654e9a81">d_cnfStack</a>.size(), <span class="stringliteral">"size mismatch"</span>);
<a name="l00345"></a>00345 }
<a name="l00346"></a>00346
<a name="l00347"></a>00347 <span class="keywordflow">if</span> (<a class="code" href="classSAT_1_1DPLLTBasic.html#aba339d2d7e2f5ed7bf1367e497e73087">d_mngStack</a>.size() == 0) {
<a name="l00348"></a>00348 <span class="keywordflow">if</span> (readyPrev && !<a class="code" href="classSAT_1_1DPLLTBasic.html#af53a2ee63b573d7ddd70395cc58fab6a">d_ready</a>) {
<a name="l00349"></a>00349 <span class="keyword">delete</span> <a class="code" href="classSAT_1_1DPLLTBasic.html#a21ec19cee9ab93b7cda66d209dd6e676">d_mng</a>;
<a name="l00350"></a>00350 <span class="keyword">delete</span> <a class="code" href="classSAT_1_1DPLLTBasic.html#a191c0c9c76c2ab5a37038c32a7c6ab58">d_cnf</a>;
<a name="l00351"></a>00351 <a class="code" href="classSAT_1_1DPLLTBasic.html#a082ff0d184786dbd60a400320dbc826a">createManager</a>();
<a name="l00352"></a>00352 <a class="code" href="classSAT_1_1DPLLTBasic.html#a191c0c9c76c2ab5a37038c32a7c6ab58">d_cnf</a> = <span class="keyword">new</span> <a class="code" href="classSAT_1_1CNF__Formula__Impl.html">CNF_Formula_Impl</a>();
<a name="l00353"></a>00353 <a class="code" href="classSAT_1_1DPLLTBasic.html#af53a2ee63b573d7ddd70395cc58fab6a">d_ready</a> = <span class="keyword">true</span>;
<a name="l00354"></a>00354 }
<a name="l00355"></a>00355 <span class="keywordflow">else</span> {
<a name="l00356"></a>00356 <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(readyPrev == <a class="code" href="classSAT_1_1DPLLTBasic.html#af53a2ee63b573d7ddd70395cc58fab6a">d_ready</a>, <span class="stringliteral">"Unexpected ready values"</span>);
<a name="l00357"></a>00357 }
<a name="l00358"></a>00358 }
<a name="l00359"></a>00359 <span class="keywordflow">else</span> {
<a name="l00360"></a>00360 <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(!<a class="code" href="classSAT_1_1DPLLTBasic.html#af53a2ee63b573d7ddd70395cc58fab6a">d_ready</a>, <span class="stringliteral">"Expected ready to be false"</span>);
<a name="l00361"></a>00361 }
<a name="l00362"></a>00362
<a name="l00363"></a>00363 <span class="keywordflow">while</span> (<a class="code" href="classSAT_1_1DPLLTBasic.html#ac1e928276774bc77063ee05aa2ceb078">d_pushLevel</a> == pushLevel)
<a name="l00364"></a>00364 <a class="code" href="classSAT_1_1DPLLT.html#aafa21967afbd30f8c18ebc9f6c37bfa9">d_theoryAPI</a>-><a class="code" href="classSAT_1_1DPLLT_1_1TheoryAPI.html#a51a08aab04c2185513676a316aee14b4" title="Restore most recent checkpoint.">pop</a>();
<a name="l00365"></a>00365
<a name="l00366"></a>00366 }
<a name="l00367"></a>00367
<a name="l00368"></a><a class="code" href="classSAT_1_1DPLLTBasic.html#a4047558a5e4a9e84b81e388b220d4e79">00368</a> std::vector<SAT::Lit> <a class="code" href="classSAT_1_1DPLLTBasic.html#a4047558a5e4a9e84b81e388b220d4e79">DPLLTBasic::getCurAssignments</a>(){
<a name="l00369"></a>00369 std::vector<SAT::Lit> nothing;
<a name="l00370"></a>00370 <span class="keywordflow">return</span> nothing;
<a name="l00371"></a>00371 }
<a name="l00372"></a>00372
<a name="l00373"></a><a class="code" href="classSAT_1_1DPLLTBasic.html#abaf2763764a68c9e4fbc190953b4e6c8">00373</a> std::vector<std::vector<SAT::Lit> > <a class="code" href="classSAT_1_1DPLLTBasic.html#abaf2763764a68c9e4fbc190953b4e6c8">DPLLTBasic::getCurClauses</a>(){
<a name="l00374"></a>00374 std::vector<std::vector<SAT::Lit> > nothing;
<a name="l00375"></a>00375 <span class="keywordflow">return</span> nothing;
<a name="l00376"></a>00376 }
<a name="l00377"></a>00377
<a name="l00378"></a>00378
<a name="l00379"></a><a class="code" href="classSAT_1_1DPLLTBasic.html#afaffe075e05bcd2e56aeede2154e0d5a">00379</a> <span class="keywordtype">void</span> <a class="code" href="classSAT_1_1DPLLTBasic.html#afaffe075e05bcd2e56aeede2154e0d5a" title="Add new clauses to the SAT solver.">DPLLTBasic::addAssertion</a>(<span class="keyword">const</span> <a class="code" href="classSAT_1_1CNF__Formula.html">CNF_Formula</a>& cnf)
<a name="l00380"></a>00380 {
<a name="l00381"></a>00381 <span class="comment">// Immediately assert unit clauses</span>
<a name="l00382"></a>00382 <a class="code" href="classSAT_1_1CNF__Formula.html#ac247d01a4cc1e5aab84294cb4c00ddbf">CNF_Formula::const_iterator</a> i, iend;
<a name="l00383"></a>00383 <a class="code" href="classSAT_1_1Clause.html#af739bca890fe8219a7ebda3beefb0474">Clause::const_iterator</a> j, jend;
<a name="l00384"></a>00384 <span class="keywordflow">for</span> (i = cnf.<a class="code" href="classSAT_1_1CNF__Formula.html#a6631cf3c5a6938f655360f7f63522b79">end</a>()-1, iend = cnf.<a class="code" href="classSAT_1_1CNF__Formula.html#a69dfc94796b23b6913c44a4d6d60f0d8">begin</a>()-1; i != iend; --i) {
<a name="l00385"></a>00385 <span class="keywordflow">if</span> ((*i).isUnit()) {
<a name="l00386"></a>00386 j = (*i).begin();
<a name="l00387"></a>00387 <a class="code" href="classSAT_1_1DPLLT.html#aafa21967afbd30f8c18ebc9f6c37bfa9">d_theoryAPI</a>-><a class="code" href="classSAT_1_1DPLLT_1_1TheoryAPI.html#a3b3ef70567e0298cd3e971fd57d26fa6" title="Notify theory when a literal is set to true.">assertLit</a>(*j);
<a name="l00388"></a>00388 }
<a name="l00389"></a>00389 }
<a name="l00390"></a>00390
<a name="l00391"></a>00391 <span class="comment">// Accumulate assertions in d_assertions</span>
<a name="l00392"></a>00392 (*d_assertions) += cnf;
<a name="l00393"></a>00393 }
<a name="l00394"></a>00394
<a name="l00395"></a>00395
<a name="l00396"></a><a class="code" href="classSAT_1_1DPLLTBasic.html#a195fdfa1972c882fd3d87eae0742c7ac">00396</a> <a class="code" href="namespaceCVC3.html#a060d21b3207cc3471e24f8dbcff3498b">QueryResult</a> <a class="code" href="classSAT_1_1DPLLTBasic.html#a195fdfa1972c882fd3d87eae0742c7ac" title="Check the satisfiability of a set of clauses in the current context.">DPLLTBasic::checkSat</a>(<span class="keyword">const</span> <a class="code" href="classSAT_1_1CNF__Formula.html">CNF_Formula</a>& cnf)
<a name="l00397"></a>00397 {
<a name="l00398"></a>00398 <a class="code" href="classSatSolver.html#a09aef5b79042b31f37d0184667c34d53">SatSolver::SATStatus</a> result;
<a name="l00399"></a>00399
<a name="l00400"></a>00400 <span class="keywordflow">if</span> (!<a class="code" href="classSAT_1_1DPLLTBasic.html#af53a2ee63b573d7ddd70395cc58fab6a">d_ready</a>) {
<a name="l00401"></a>00401 <span class="comment">// Copy current formula</span>
<a name="l00402"></a>00402 <a class="code" href="classSAT_1_1DPLLTBasic.html#a423ff42fd5ccad2be5f8dd97654e9a81">d_cnfStack</a>.push_back(<a class="code" href="classSAT_1_1DPLLTBasic.html#a191c0c9c76c2ab5a37038c32a7c6ab58">d_cnf</a>);
<a name="l00403"></a>00403 <a class="code" href="classSAT_1_1DPLLTBasic.html#a191c0c9c76c2ab5a37038c32a7c6ab58">d_cnf</a> = <span class="keyword">new</span> <a class="code" href="classSAT_1_1CNF__Formula__Impl.html">CNF_Formula_Impl</a>(*<a class="code" href="classSAT_1_1DPLLTBasic.html#a191c0c9c76c2ab5a37038c32a7c6ab58">d_cnf</a>);
<a name="l00404"></a>00404
<a name="l00405"></a>00405 <span class="comment">// make unit clauses for current assignment</span>
<a name="l00406"></a>00406 <span class="keywordtype">int</span> value;
<a name="l00407"></a>00407 <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 1; i <= <a class="code" href="classSAT_1_1DPLLTBasic.html#a21ec19cee9ab93b7cda66d209dd6e676">d_mng</a>-><a class="code" href="classSatSolver.html#a75ac3919b9d2794bd2443e32bb1f29fd">NumVariables</a>(); ++i) {
<a name="l00408"></a>00408 value = <a class="code" href="classSAT_1_1DPLLTBasic.html#a21ec19cee9ab93b7cda66d209dd6e676">d_mng</a>-><a class="code" href="classSatSolver.html#a111b3a56be2feaae62bc57483f0aa9bf">GetVarAssignment</a>(<a class="code" href="classSAT_1_1DPLLTBasic.html#a21ec19cee9ab93b7cda66d209dd6e676">d_mng</a>-><a class="code" href="classSatSolver.html#aebeecffca634f23d8c9b941b44b4cfe7">GetVar</a>(i));
<a name="l00409"></a>00409 <span class="keywordflow">if</span> (value == 1) {
<a name="l00410"></a>00410 <a class="code" href="classSAT_1_1DPLLTBasic.html#a191c0c9c76c2ab5a37038c32a7c6ab58">d_cnf</a>-><a class="code" href="classSAT_1_1CNF__Formula__Impl.html#adffd09ad005d74fdad1be0fc80727767">newClause</a>();
<a name="l00411"></a>00411 <a class="code" href="classSAT_1_1DPLLTBasic.html#a191c0c9c76c2ab5a37038c32a7c6ab58">d_cnf</a>-><a class="code" href="classSAT_1_1CNF__Formula.html#a4c59929d06b987ed68639f1b85a62606">addLiteral</a>(<a class="code" href="classSAT_1_1Lit.html">Lit</a>(i));
<a name="l00412"></a>00412 }
<a name="l00413"></a>00413 <span class="keywordflow">else</span> <span class="keywordflow">if</span> (value == 0) {
<a name="l00414"></a>00414 <a class="code" href="classSAT_1_1DPLLTBasic.html#a191c0c9c76c2ab5a37038c32a7c6ab58">d_cnf</a>-><a class="code" href="classSAT_1_1CNF__Formula__Impl.html#adffd09ad005d74fdad1be0fc80727767">newClause</a>();
<a name="l00415"></a>00415 <a class="code" href="classSAT_1_1DPLLTBasic.html#a191c0c9c76c2ab5a37038c32a7c6ab58">d_cnf</a>-><a class="code" href="classSAT_1_1CNF__Formula.html#a4c59929d06b987ed68639f1b85a62606">addLiteral</a>(<a class="code" href="classSAT_1_1Lit.html">Lit</a>(i, <span class="keyword">false</span>));
<a name="l00416"></a>00416 }
<a name="l00417"></a>00417 }
<a name="l00418"></a>00418
<a name="l00419"></a>00419 <span class="comment">// Create new manager</span>
<a name="l00420"></a>00420 <a class="code" href="classSAT_1_1DPLLTBasic.html#aba339d2d7e2f5ed7bf1367e497e73087">d_mngStack</a>.push_back(<a class="code" href="classSAT_1_1DPLLTBasic.html#a21ec19cee9ab93b7cda66d209dd6e676">d_mng</a>);
<a name="l00421"></a>00421 <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(<a class="code" href="classSAT_1_1DPLLTBasic.html#aba339d2d7e2f5ed7bf1367e497e73087">d_mngStack</a>.size() == <a class="code" href="classSAT_1_1DPLLTBasic.html#a423ff42fd5ccad2be5f8dd97654e9a81">d_cnfStack</a>.size(), <span class="stringliteral">"size mismatch"</span>);
<a name="l00422"></a>00422 <a class="code" href="classSAT_1_1DPLLTBasic.html#a082ff0d184786dbd60a400320dbc826a">createManager</a>();
<a name="l00423"></a>00423 }
<a name="l00424"></a>00424 <a class="code" href="classSAT_1_1DPLLTBasic.html#af53a2ee63b573d7ddd70395cc58fab6a">d_ready</a> = <span class="keyword">false</span>;
<a name="l00425"></a>00425
<a name="l00426"></a>00426 <span class="keywordflow">if</span> (<a class="code" href="classSAT_1_1DPLLTBasic.html#a6032bad91260ee1c03ed4553425d6cf9">d_assertions</a>) (*d_cnf) += (*d_assertions);
<a name="l00427"></a>00427
<a name="l00428"></a>00428 (*d_cnf) += cnf;
<a name="l00429"></a>00429 <a class="code" href="classSAT_1_1DPLLTBasic.html#a744ab3115b0c945843cc1310d06280b3">generate_CDB</a>(*<a class="code" href="classSAT_1_1DPLLTBasic.html#a191c0c9c76c2ab5a37038c32a7c6ab58">d_cnf</a>);
<a name="l00430"></a>00430
<a name="l00431"></a>00431 <a class="code" href="classSAT_1_1DPLLT.html#aafa21967afbd30f8c18ebc9f6c37bfa9">d_theoryAPI</a>-><a class="code" href="classSAT_1_1DPLLT_1_1TheoryAPI.html#a771e84ea6308cb7d3f7d02e7858b37db" title="Set a checkpoint for backtracking.">push</a>();
<a name="l00432"></a>00432
<a name="l00433"></a>00433 result = <a class="code" href="classSAT_1_1DPLLTBasic.html#a21ec19cee9ab93b7cda66d209dd6e676">d_mng</a>-><a class="code" href="classSatSolver.html#a0dfc1321f3446be70349f35881144433">Satisfiable</a>(<span class="keyword">true</span>);
<a name="l00434"></a>00434 <span class="keywordflow">if</span> (result == <a class="code" href="classSatSolver.html#a09aef5b79042b31f37d0184667c34d53a8bc290b76f93dd68bdc44d083a7c4e25">SatSolver::SATISFIABLE</a> && <a class="code" href="classSAT_1_1DPLLT.html#adec2886c41b3443c264b852bc5f5a84c">theoryAPI</a>()->outOfResources())
<a name="l00435"></a>00435 result = <a class="code" href="classSatSolver.html#a09aef5b79042b31f37d0184667c34d53a1a1ccd6ae244cce5f08fcdf2d4621fe0">SatSolver::BUDGET_EXCEEDED</a>;
<a name="l00436"></a>00436
<a name="l00437"></a>00437 <span class="comment">// Print result</span>
<a name="l00438"></a>00438
<a name="l00439"></a>00439 <span class="keywordflow">if</span> (result == <a class="code" href="classSatSolver.html#a09aef5b79042b31f37d0184667c34d53a8bc290b76f93dd68bdc44d083a7c4e25">SatSolver::SATISFIABLE</a>) {
<a name="l00440"></a>00440 <a class="code" href="classSAT_1_1DPLLTBasic.html#a1340aa7926370e1bc90d1da906eb8e79">verify_solution</a>();
<a name="l00441"></a>00441 <span class="keywordflow">if</span> (<a class="code" href="classSAT_1_1DPLLTBasic.html#a6032bad91260ee1c03ed4553425d6cf9">d_assertions</a>-><a class="code" href="classSAT_1_1CD__CNF__Formula.html#a40948c1f2c702dfe58e4b63776ec18fd">numClauses</a>() > 0) {
<a name="l00442"></a>00442 <a class="code" href="classSAT_1_1DPLLTBasic.html#a4194dcc23968652060be41902ca5b376">d_assertionsStack</a>.push_back(<a class="code" href="classSAT_1_1DPLLTBasic.html#a6032bad91260ee1c03ed4553425d6cf9">d_assertions</a>);
<a name="l00443"></a>00443 <a class="code" href="classSAT_1_1DPLLTBasic.html#a6032bad91260ee1c03ed4553425d6cf9">d_assertions</a> = <span class="keyword">new</span> <a class="code" href="classSAT_1_1CD__CNF__Formula.html">CD_CNF_Formula</a>(<a class="code" href="classSAT_1_1DPLLTBasic.html#a9e8593063e800cb17793629543493624">d_cm</a>-><a class="code" href="classCVC3_1_1ContextManager.html#a66a7d900301c1459de90b048623d9297">getCurrentContext</a>());
<a name="l00444"></a>00444 }
<a name="l00445"></a>00445 }
<a name="l00446"></a>00446 <a class="code" href="classSAT_1_1DPLLTBasic.html#aa41a72c436f5faf03128d53bc4e3f9ef">handle_result</a> (result);
<a name="l00447"></a>00447
<a name="l00448"></a>00448 <span class="keywordflow">if</span> (result == <a class="code" href="classSatSolver.html#a09aef5b79042b31f37d0184667c34d53ad154fc26948177f01812d287e6340734">SatSolver::UNSATISFIABLE</a>) {
<a name="l00449"></a>00449 <a class="code" href="classSAT_1_1DPLLT.html#aafa21967afbd30f8c18ebc9f6c37bfa9">d_theoryAPI</a>-><a class="code" href="classSAT_1_1DPLLT_1_1TheoryAPI.html#a51a08aab04c2185513676a316aee14b4" title="Restore most recent checkpoint.">pop</a>();
<a name="l00450"></a>00450 <span class="keyword">delete</span> <a class="code" href="classSAT_1_1DPLLTBasic.html#a21ec19cee9ab93b7cda66d209dd6e676">d_mng</a>;
<a name="l00451"></a>00451 <span class="keyword">delete</span> <a class="code" href="classSAT_1_1DPLLTBasic.html#a191c0c9c76c2ab5a37038c32a7c6ab58">d_cnf</a>;
<a name="l00452"></a>00452 <span class="keywordflow">if</span> (<a class="code" href="classSAT_1_1DPLLTBasic.html#aba339d2d7e2f5ed7bf1367e497e73087">d_mngStack</a>.size() == 0) {
<a name="l00453"></a>00453 <a class="code" href="classSAT_1_1DPLLTBasic.html#a082ff0d184786dbd60a400320dbc826a">createManager</a>();
<a name="l00454"></a>00454 <a class="code" href="classSAT_1_1DPLLTBasic.html#a191c0c9c76c2ab5a37038c32a7c6ab58">d_cnf</a> = <span class="keyword">new</span> <a class="code" href="classSAT_1_1CNF__Formula__Impl.html">CNF_Formula_Impl</a>();
<a name="l00455"></a>00455 <a class="code" href="classSAT_1_1DPLLTBasic.html#af53a2ee63b573d7ddd70395cc58fab6a">d_ready</a> = <span class="keyword">true</span>;
<a name="l00456"></a>00456 }
<a name="l00457"></a>00457 <span class="keywordflow">else</span> {
<a name="l00458"></a>00458 <a class="code" href="classSAT_1_1DPLLTBasic.html#a21ec19cee9ab93b7cda66d209dd6e676">d_mng</a> = <a class="code" href="classSAT_1_1DPLLTBasic.html#aba339d2d7e2f5ed7bf1367e497e73087">d_mngStack</a>.back();
<a name="l00459"></a>00459 <a class="code" href="classSAT_1_1DPLLTBasic.html#aba339d2d7e2f5ed7bf1367e497e73087">d_mngStack</a>.pop_back();
<a name="l00460"></a>00460 <a class="code" href="classSAT_1_1DPLLTBasic.html#a191c0c9c76c2ab5a37038c32a7c6ab58">d_cnf</a> = <a class="code" href="classSAT_1_1DPLLTBasic.html#a423ff42fd5ccad2be5f8dd97654e9a81">d_cnfStack</a>.back();
<a name="l00461"></a>00461 <a class="code" href="classSAT_1_1DPLLTBasic.html#a423ff42fd5ccad2be5f8dd97654e9a81">d_cnfStack</a>.pop_back();
<a name="l00462"></a>00462 <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(<a class="code" href="classSAT_1_1DPLLTBasic.html#aba339d2d7e2f5ed7bf1367e497e73087">d_mngStack</a>.size() == <a class="code" href="classSAT_1_1DPLLTBasic.html#a423ff42fd5ccad2be5f8dd97654e9a81">d_cnfStack</a>.size(), <span class="stringliteral">"size mismatch"</span>);
<a name="l00463"></a>00463 }
<a name="l00464"></a>00464 }
<a name="l00465"></a>00465
<a name="l00466"></a>00466 <span class="keywordflow">return</span> (result == <a class="code" href="classSatSolver.html#a09aef5b79042b31f37d0184667c34d53ad154fc26948177f01812d287e6340734">SatSolver::UNSATISFIABLE</a> ? <a class="code" href="xchaff__solver_8h.html#a259c70233f322b3e490149190b8bb87ba709691b4dfbbba6c6f992a7cd34dd0e9">UNSATISFIABLE</a> :
<a name="l00467"></a>00467 result == <a class="code" href="classSatSolver.html#a09aef5b79042b31f37d0184667c34d53a8bc290b76f93dd68bdc44d083a7c4e25">SatSolver::SATISFIABLE</a> ? <a class="code" href="xchaff__solver_8h.html#a259c70233f322b3e490149190b8bb87baa6a5c07f8c320f440ebc34fed65eb550">SATISFIABLE</a> :
<a name="l00468"></a>00468 <a class="code" href="namespaceCVC3.html#a060d21b3207cc3471e24f8dbcff3498ba33046505033fa14ebb412efb4474ff56">ABORT</a>);
<a name="l00469"></a>00469 }
<a name="l00470"></a>00470
<a name="l00471"></a>00471
<a name="l00472"></a><a class="code" href="classSAT_1_1DPLLTBasic.html#a1271494f0f1f6e9c249d8fce8418ecd7">00472</a> <a class="code" href="namespaceCVC3.html#a060d21b3207cc3471e24f8dbcff3498b">QueryResult</a> <a class="code" href="classSAT_1_1DPLLTBasic.html#a1271494f0f1f6e9c249d8fce8418ecd7" title="Continue checking the last check with additional constraints.">DPLLTBasic::continueCheck</a>(<span class="keyword">const</span> <a class="code" href="classSAT_1_1CNF__Formula.html">CNF_Formula</a>& cnf)
<a name="l00473"></a>00473 {
<a name="l00474"></a>00474 <a class="code" href="classSatSolver.html#a09aef5b79042b31f37d0184667c34d53">SatSolver::SATStatus</a> result;
<a name="l00475"></a>00475
<a name="l00476"></a>00476 <span class="keywordflow">if</span> (<a class="code" href="classSAT_1_1DPLLTBasic.html#af53a2ee63b573d7ddd70395cc58fab6a">d_ready</a>) {
<a name="l00477"></a>00477 <span class="keywordflow">throw</span> <a class="code" href="classCVC3_1_1Exception.html">Exception</a>
<a name="l00478"></a>00478 (<span class="stringliteral">"continueCheck should be called after a previous satisfiable result"</span>);
<a name="l00479"></a>00479 }
<a name="l00480"></a>00480 <span class="keywordflow">if</span> (<a class="code" href="classSAT_1_1DPLLTBasic.html#a6032bad91260ee1c03ed4553425d6cf9">d_assertions</a>-><a class="code" href="classSAT_1_1CD__CNF__Formula.html#a40948c1f2c702dfe58e4b63776ec18fd">numClauses</a>() > 0) {
<a name="l00481"></a>00481 <span class="keywordflow">throw</span> <a class="code" href="classCVC3_1_1Exception.html">Exception</a>
<a name="l00482"></a>00482 (<span class="stringliteral">"a check cannot be continued if new assertions have been made"</span>);
<a name="l00483"></a>00483 }
<a name="l00484"></a>00484 <a class="code" href="classSAT_1_1CNF__Formula__Impl.html">CNF_Formula_Impl</a> cnfImpl(cnf);
<a name="l00485"></a>00485
<a name="l00486"></a>00486 <a class="code" href="classSAT_1_1DPLLTBasic.html#a744ab3115b0c945843cc1310d06280b3">generate_CDB</a>(cnfImpl);
<a name="l00487"></a>00487 (*d_cnf) += cnfImpl;
<a name="l00488"></a>00488
<a name="l00489"></a>00489 result = <a class="code" href="classSAT_1_1DPLLTBasic.html#a21ec19cee9ab93b7cda66d209dd6e676">d_mng</a>-><a class="code" href="classSatSolver.html#ab4e73333fbc4b4372a18c66a40d4757f">Continue</a>();
<a name="l00490"></a>00490 <span class="keywordflow">if</span> (result == <a class="code" href="classSatSolver.html#a09aef5b79042b31f37d0184667c34d53a8bc290b76f93dd68bdc44d083a7c4e25">SatSolver::SATISFIABLE</a> && <a class="code" href="classSAT_1_1DPLLT.html#adec2886c41b3443c264b852bc5f5a84c">theoryAPI</a>()->outOfResources())
<a name="l00491"></a>00491 result = <a class="code" href="classSatSolver.html#a09aef5b79042b31f37d0184667c34d53a1a1ccd6ae244cce5f08fcdf2d4621fe0">SatSolver::BUDGET_EXCEEDED</a>;
<a name="l00492"></a>00492
<a name="l00493"></a>00493 <span class="comment">// Print result</span>
<a name="l00494"></a>00494
<a name="l00495"></a>00495 <span class="keywordflow">if</span> (result == <a class="code" href="classSatSolver.html#a09aef5b79042b31f37d0184667c34d53a8bc290b76f93dd68bdc44d083a7c4e25">SatSolver::SATISFIABLE</a>)
<a name="l00496"></a>00496 <a class="code" href="classSAT_1_1DPLLTBasic.html#a1340aa7926370e1bc90d1da906eb8e79">verify_solution</a>();
<a name="l00497"></a>00497 <a class="code" href="classSAT_1_1DPLLTBasic.html#aa41a72c436f5faf03128d53bc4e3f9ef">handle_result</a> (result);
<a name="l00498"></a>00498
<a name="l00499"></a>00499 <span class="keywordflow">if</span> (result == <a class="code" href="classSatSolver.html#a09aef5b79042b31f37d0184667c34d53ad154fc26948177f01812d287e6340734">SatSolver::UNSATISFIABLE</a>) {
<a name="l00500"></a>00500 <a class="code" href="classSAT_1_1DPLLT.html#aafa21967afbd30f8c18ebc9f6c37bfa9">d_theoryAPI</a>-><a class="code" href="classSAT_1_1DPLLT_1_1TheoryAPI.html#a51a08aab04c2185513676a316aee14b4" title="Restore most recent checkpoint.">pop</a>();
<a name="l00501"></a>00501 <span class="keyword">delete</span> <a class="code" href="classSAT_1_1DPLLTBasic.html#a21ec19cee9ab93b7cda66d209dd6e676">d_mng</a>;
<a name="l00502"></a>00502 <span class="keyword">delete</span> <a class="code" href="classSAT_1_1DPLLTBasic.html#a191c0c9c76c2ab5a37038c32a7c6ab58">d_cnf</a>;
<a name="l00503"></a>00503 <span class="keywordflow">if</span> (<a class="code" href="classSAT_1_1DPLLTBasic.html#aba339d2d7e2f5ed7bf1367e497e73087">d_mngStack</a>.size() == 0) {
<a name="l00504"></a>00504 <a class="code" href="classSAT_1_1DPLLTBasic.html#a082ff0d184786dbd60a400320dbc826a">createManager</a>();
<a name="l00505"></a>00505 <a class="code" href="classSAT_1_1DPLLTBasic.html#a191c0c9c76c2ab5a37038c32a7c6ab58">d_cnf</a> = <span class="keyword">new</span> <a class="code" href="classSAT_1_1CNF__Formula__Impl.html">CNF_Formula_Impl</a>();
<a name="l00506"></a>00506 <a class="code" href="classSAT_1_1DPLLTBasic.html#af53a2ee63b573d7ddd70395cc58fab6a">d_ready</a> = <span class="keyword">true</span>;
<a name="l00507"></a>00507 }
<a name="l00508"></a>00508 <span class="keywordflow">else</span> {
<a name="l00509"></a>00509 <a class="code" href="classSAT_1_1DPLLTBasic.html#a21ec19cee9ab93b7cda66d209dd6e676">d_mng</a> = <a class="code" href="classSAT_1_1DPLLTBasic.html#aba339d2d7e2f5ed7bf1367e497e73087">d_mngStack</a>.back();
<a name="l00510"></a>00510 <a class="code" href="classSAT_1_1DPLLTBasic.html#aba339d2d7e2f5ed7bf1367e497e73087">d_mngStack</a>.pop_back();
<a name="l00511"></a>00511 <a class="code" href="classSAT_1_1DPLLTBasic.html#a191c0c9c76c2ab5a37038c32a7c6ab58">d_cnf</a> = <a class="code" href="classSAT_1_1DPLLTBasic.html#a423ff42fd5ccad2be5f8dd97654e9a81">d_cnfStack</a>.back();
<a name="l00512"></a>00512 <a class="code" href="classSAT_1_1DPLLTBasic.html#a423ff42fd5ccad2be5f8dd97654e9a81">d_cnfStack</a>.pop_back();
<a name="l00513"></a>00513 <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(<a class="code" href="classSAT_1_1DPLLTBasic.html#aba339d2d7e2f5ed7bf1367e497e73087">d_mngStack</a>.size() == <a class="code" href="classSAT_1_1DPLLTBasic.html#a423ff42fd5ccad2be5f8dd97654e9a81">d_cnfStack</a>.size(), <span class="stringliteral">"size mismatch"</span>);
<a name="l00514"></a>00514 }
<a name="l00515"></a>00515 }
<a name="l00516"></a>00516
<a name="l00517"></a>00517 <span class="keywordflow">return</span> (result == <a class="code" href="classSatSolver.html#a09aef5b79042b31f37d0184667c34d53ad154fc26948177f01812d287e6340734">SatSolver::UNSATISFIABLE</a> ? <a class="code" href="xchaff__solver_8h.html#a259c70233f322b3e490149190b8bb87ba709691b4dfbbba6c6f992a7cd34dd0e9">UNSATISFIABLE</a> :
<a name="l00518"></a>00518 result == <a class="code" href="classSatSolver.html#a09aef5b79042b31f37d0184667c34d53a8bc290b76f93dd68bdc44d083a7c4e25">SatSolver::SATISFIABLE</a> ? <a class="code" href="xchaff__solver_8h.html#a259c70233f322b3e490149190b8bb87baa6a5c07f8c320f440ebc34fed65eb550">SATISFIABLE</a> :
<a name="l00519"></a>00519 <a class="code" href="namespaceCVC3.html#a060d21b3207cc3471e24f8dbcff3498ba33046505033fa14ebb412efb4474ff56">ABORT</a>);
<a name="l00520"></a>00520 }
<a name="l00521"></a>00521
<a name="l00522"></a><a class="code" href="classSAT_1_1DPLLTBasic.html#a0c4e0f09aacb6791929ac0eb6e6662c0">00522</a> <a class="code" href="classCVC3_1_1Proof.html">CVC3::Proof</a> <a class="code" href="classSAT_1_1DPLLTBasic.html#a0c4e0f09aacb6791929ac0eb6e6662c0" title="Get the proof from SAT engine.">DPLLTBasic::getSatProof</a>(<a class="code" href="classSAT_1_1CNF__Manager.html">CNF_Manager</a>* cnfManager, <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>* core){
<a name="l00523"></a>00523 <a class="code" href="classCVC3_1_1Proof.html">CVC3::Proof</a> temp;
<a name="l00524"></a>00524 <span class="keywordflow">return</span> temp;
<a name="l00525"></a>00525 }
<a name="l00526"></a>00526
</pre></div></div>
</div>
<hr class="footer"/><address class="footer"><small>Generated on Wed Sep 7 2011 for CVC3 by 
<a href="http://www.doxygen.org/index.html">
<img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.7.4 </small></address>
</body>
</html>
