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<div class="title">minisat_derivation.cpp</div> </div>
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<a href="minisat__derivation_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 minisat_derivation.cpp</span>
<a name="l00004"></a>00004 <span class="comment"> *\brief MiniSat proof logging</span>
<a name="l00005"></a>00005 <span class="comment"> *</span>
<a name="l00006"></a>00006 <span class="comment"> * Author: Alexander Fuchs</span>
<a name="l00007"></a>00007 <span class="comment"> *</span>
<a name="l00008"></a>00008 <span class="comment"> * Created: Sun Dec 07 11:09:00 2007</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="minisat__derivation_8h.html" title="MiniSat proof logging.">minisat_derivation.h</a>"</span>
<a name="l00023"></a>00023 <span class="preprocessor">#include "<a class="code" href="minisat__solver_8h.html" title="Adaptation of MiniSat to DPLL(T)">minisat_solver.h</a>"</span>
<a name="l00024"></a>00024 <span class="preprocessor">#include "<a class="code" href="sat__proof_8h.html" title="Sat solver proof representation.">sat_proof.h</a>"</span>
<a name="l00025"></a>00025 <span class="preprocessor">#include <set></span>
<a name="l00026"></a>00026 <span class="preprocessor">#include <iostream></span>
<a name="l00027"></a>00027
<a name="l00028"></a>00028 <span class="keyword">using namespace </span>MiniSat;
<a name="l00029"></a>00029 <span class="keyword">using namespace </span>std;
<a name="l00030"></a>00030
<a name="l00031"></a><a class="code" href="classMiniSat_1_1Inference.html#aacd9c375bc7b8b0d87a15bcd9b5d35ce">00031</a> std::string <a class="code" href="classMiniSat_1_1Inference.html#aacd9c375bc7b8b0d87a15bcd9b5d35ce">Inference::toString</a>()<span class="keyword"> const </span>{
<a name="l00032"></a>00032 ostringstream buffer;
<a name="l00033"></a>00033 buffer << getStart();
<a name="l00034"></a>00034 <span class="keywordflow">for</span> (Inference::TSteps::const_iterator step = d_steps.begin(); step != d_steps.end(); ++step) {
<a name="l00035"></a>00035 buffer << <span class="stringliteral">" "</span> << step->first.toString() << <span class="stringliteral">" "</span> << step->second;
<a name="l00036"></a>00036 }
<a name="l00037"></a>00037 <span class="keywordflow">return</span> buffer.str();
<a name="l00038"></a>00038 }
<a name="l00039"></a>00039
<a name="l00040"></a>00040
<a name="l00041"></a>00041
<a name="l00042"></a>00042
<a name="l00043"></a>00043
<a name="l00044"></a><a class="code" href="classMiniSat_1_1Derivation.html#a72d5632fb889b903e8f88891943e5562">00044</a> <a class="code" href="classMiniSat_1_1Derivation.html#a72d5632fb889b903e8f88891943e5562">Derivation::~Derivation</a>() {
<a name="l00045"></a>00045 <span class="comment">// deallocate generated unit clauses</span>
<a name="l00046"></a>00046 <span class="keywordflow">for</span> (<a class="code" href="classHash_1_1hash__map.html#a0fae180472ddfd8822c881caf23c11a9">TClauses::iterator</a> i = d_unitClauses.begin(); i != d_unitClauses.end(); ++i) {
<a name="l00047"></a>00047 <a class="code" href="namespaceMiniSat.html#acbe7b3fac8ab3909327207b0fea1f4d8">xfree</a>(i->second);
<a name="l00048"></a>00048 }
<a name="l00049"></a>00049
<a name="l00050"></a>00050 <span class="comment">// deallocate removed clauses</span>
<a name="l00051"></a>00051 <span class="keywordflow">for</span> (std::deque<Clause*>::iterator i = d_removedClauses.begin(); i != d_removedClauses.end(); ++i) {
<a name="l00052"></a>00052 <a class="code" href="namespaceMiniSat.html#acbe7b3fac8ab3909327207b0fea1f4d8">xfree</a>(*i);
<a name="l00053"></a>00053 }
<a name="l00054"></a>00054
<a name="l00055"></a>00055 <span class="comment">// deallocate inferences</span>
<a name="l00056"></a>00056 <span class="keywordflow">for</span> (<a class="code" href="classHash_1_1hash__map.html#a0fae180472ddfd8822c881caf23c11a9">TInferences::iterator</a> i = d_inferences.begin(); i != d_inferences.end(); ++i) {
<a name="l00057"></a>00057 <span class="keyword">delete</span> i->second;
<a name="l00058"></a>00058 }
<a name="l00059"></a>00059 }
<a name="l00060"></a>00060
<a name="l00061"></a>00061
<a name="l00062"></a><a class="code" href="classMiniSat_1_1Derivation.html#ac5cf738303de9c9c2b15d7d9e0b44cce">00062</a> <span class="keywordtype">int</span> <a class="code" href="classMiniSat_1_1Derivation.html#ac5cf738303de9c9c2b15d7d9e0b44cce">Derivation::computeRootReason</a>(<a class="code" href="classMiniSat_1_1Lit.html">Lit</a> implied, <a class="code" href="classMiniSat_1_1Solver.html">Solver</a>* solver) {
<a name="l00063"></a>00063 <a class="code" href="classMiniSat_1_1Clause.html">Clause</a>* reason = solver-><a class="code" href="classMiniSat_1_1Solver.html#a8660c6ceafa236f5533e432bb859aeba">getReason</a>(implied);
<a name="l00064"></a>00064 <span class="comment">// cout << "computeRootReason " << reason->id() << endl;</span>
<a name="l00065"></a>00065 <a class="code" href="debug_8h.html#a2637b2fffa22e3c9fad40cda8fcc3bce" title="If something goes horribly wrong, print a message and abort immediately with exit(1).">FatalAssert</a>(d_clauses.find(reason-><a class="code" href="classMiniSat_1_1Clause.html#aeb8881da1f982f5bc58bac190ab2f2a4">id</a>()) != d_clauses.end(),
<a name="l00066"></a>00066 <span class="stringliteral">"MiniSat::Derivation::computeRootReason: implied reason not registered"</span>);
<a name="l00067"></a>00067 <a class="code" href="debug_8h.html#a2637b2fffa22e3c9fad40cda8fcc3bce" title="If something goes horribly wrong, print a message and abort immediately with exit(1).">FatalAssert</a>(reason == d_clauses.find(reason-><a class="code" href="classMiniSat_1_1Clause.html#aeb8881da1f982f5bc58bac190ab2f2a4">id</a>())->second,
<a name="l00068"></a>00068 <span class="stringliteral">"MiniSat::Derivation::computeRootReason: implied reason not same as registered"</span>);
<a name="l00069"></a>00069 <a class="code" href="debug_8h.html#a2637b2fffa22e3c9fad40cda8fcc3bce" title="If something goes horribly wrong, print a message and abort immediately with exit(1).">FatalAssert</a>(reason != NULL, <span class="stringliteral">"MiniSat::Derivation::computeRootReason: implied reason is NULL"</span>);
<a name="l00070"></a>00070 <a class="code" href="debug_8h.html#a2637b2fffa22e3c9fad40cda8fcc3bce" title="If something goes horribly wrong, print a message and abort immediately with exit(1).">FatalAssert</a>(reason != <a class="code" href="classMiniSat_1_1Clause.html#a9a00e9c7831cc291c83d54bf4188e830">Clause::Decision</a>(), <span class="stringliteral">"MiniSat::Derivation::computeRootReason: implied is a decision"</span>);
<a name="l00071"></a>00071 <a class="code" href="debug_8h.html#a2637b2fffa22e3c9fad40cda8fcc3bce" title="If something goes horribly wrong, print a message and abort immediately with exit(1).">FatalAssert</a>((*reason)[0] == implied, <span class="stringliteral">"MiniSat::Derivation::computeRootReason: implied is not in its reason"</span>);
<a name="l00072"></a>00072 <a class="code" href="debug_8h.html#a600cb2d68efe7cc413cccbb5714c7016">IF_DEBUG</a> (
<a name="l00073"></a>00073 <a class="code" href="debug_8h.html#a2637b2fffa22e3c9fad40cda8fcc3bce" title="If something goes horribly wrong, print a message and abort immediately with exit(1).">FatalAssert</a>(solver-><a class="code" href="classMiniSat_1_1Solver.html#adc9d01899ff6c1eefea8749a1a97309b" title="clauses / assignment">getValue</a>((*reason)[0]) == <a class="code" href="namespaceMiniSat.html#ad0b6e52186f3374f569c4de9db621be1">l_True</a>,
<a name="l00074"></a>00074 <span class="stringliteral">"MiniSat::Derivation::computeRootReason: literal not implied (TRUE)"</span>);
<a name="l00075"></a>00075 <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 1; i < reason-><a class="code" href="classMiniSat_1_1Clause.html#adf5aa50a639b4b5bb71e5ea76d45b8e2">size</a>(); ++i) {
<a name="l00076"></a>00076 <a class="code" href="debug_8h.html#a2637b2fffa22e3c9fad40cda8fcc3bce" title="If something goes horribly wrong, print a message and abort immediately with exit(1).">FatalAssert</a>(solver-><a class="code" href="classMiniSat_1_1Solver.html#adc9d01899ff6c1eefea8749a1a97309b" title="clauses / assignment">getValue</a>((*reason)[i]) == <a class="code" href="namespaceMiniSat.html#a810166165364a8a8262d24b13d7b1da9">l_False</a>,
<a name="l00077"></a>00077 <span class="stringliteral">"MiniSat::Derivation::computeRootReason: literal not implied (FALSE)"</span>);
<a name="l00078"></a>00078 }
<a name="l00079"></a>00079 )
<a name="l00080"></a>00080
<a name="l00081"></a>00081 <span class="comment">// already a unit clause, so done</span>
<a name="l00082"></a>00082 <span class="keywordflow">if</span> (reason-><a class="code" href="classMiniSat_1_1Clause.html#adf5aa50a639b4b5bb71e5ea76d45b8e2">size</a>() == 1) {
<a name="l00083"></a>00083 <span class="keywordflow">return</span> reason-><a class="code" href="classMiniSat_1_1Clause.html#aeb8881da1f982f5bc58bac190ab2f2a4">id</a>();
<a name="l00084"></a>00084 }
<a name="l00085"></a>00085
<a name="l00086"></a>00086 <span class="comment">// already derived the unit clause internally</span>
<a name="l00087"></a>00087 <a class="code" href="classHash_1_1hash__map.html#a34789fb591a84314e78bd17b69aa6065">TClauses::const_iterator</a> iter = d_unitClauses.find(implied.<a class="code" href="classMiniSat_1_1Lit.html#a91d2d44275fe1e43cee4ce673b2ab41d">index</a>());
<a name="l00088"></a>00088 <span class="keywordflow">if</span> (iter != d_unitClauses.end()) {
<a name="l00089"></a>00089 <span class="keywordflow">return</span> iter->second->id();
<a name="l00090"></a>00090 }
<a name="l00091"></a>00091
<a name="l00092"></a>00092
<a name="l00093"></a>00093 <span class="comment">// otherwise resolve the reason ...</span>
<a name="l00094"></a>00094 <a class="code" href="classMiniSat_1_1Inference.html">Inference</a>* inference = <span class="keyword">new</span> <a class="code" href="classMiniSat_1_1Inference.html">Inference</a>(reason-><a class="code" href="classMiniSat_1_1Clause.html#aeb8881da1f982f5bc58bac190ab2f2a4">id</a>());
<a name="l00095"></a>00095 <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 1; i < reason-><a class="code" href="classMiniSat_1_1Clause.html#adf5aa50a639b4b5bb71e5ea76d45b8e2">size</a>(); ++i) {
<a name="l00096"></a>00096 <a class="code" href="classMiniSat_1_1Lit.html">Lit</a> lit((*reason)[i]);
<a name="l00097"></a>00097 inference-><a class="code" href="classMiniSat_1_1Inference.html#a61184032373fe3049198f8e3a71e436f">add</a>(lit, computeRootReason(~lit, solver));
<a name="l00098"></a>00098 }
<a name="l00099"></a>00099
<a name="l00100"></a>00100 <span class="comment">// and create the new unit clause</span>
<a name="l00101"></a>00101 <span class="comment">// (after resolve, so that clause ids are chronological wrt. inference)</span>
<a name="l00102"></a>00102 vector<Lit> literals;
<a name="l00103"></a>00103 literals.push_back(implied);
<a name="l00104"></a>00104 <a class="code" href="classMiniSat_1_1Clause.html">Clause</a>* unit = <a class="code" href="namespaceMiniSat.html#a9a3ff2cc55978ca3a973861cad2814e2">Clause_new</a>(literals, <a class="code" href="classCVC3_1_1Theorem.html">CVC3::Theorem</a>(), solver-><a class="code" href="classMiniSat_1_1Solver.html#a7323aff4aaa93c01e6008e8e033d2b8f">nextClauseID</a>());
<a name="l00105"></a>00105
<a name="l00106"></a>00106 d_unitClauses[implied.<a class="code" href="classMiniSat_1_1Lit.html#a91d2d44275fe1e43cee4ce673b2ab41d">index</a>()] = unit;
<a name="l00107"></a>00107 <span class="comment">// cout << "compute root reason : " << unit->id() << endl;</span>
<a name="l00108"></a>00108 registerClause(unit);
<a name="l00109"></a>00109 registerInference(unit-><a class="code" href="classMiniSat_1_1Clause.html#aeb8881da1f982f5bc58bac190ab2f2a4">id</a>(), inference);
<a name="l00110"></a>00110
<a name="l00111"></a>00111 <span class="keywordflow">return</span> unit-><a class="code" href="classMiniSat_1_1Clause.html#aeb8881da1f982f5bc58bac190ab2f2a4">id</a>();
<a name="l00112"></a>00112 }
<a name="l00113"></a>00113
<a name="l00114"></a>00114
<a name="l00115"></a><a class="code" href="classMiniSat_1_1Derivation.html#ad17e91fe3a421ef68df9463710c5fdc9">00115</a> <span class="keywordtype">void</span> <a class="code" href="classMiniSat_1_1Derivation.html#ad17e91fe3a421ef68df9463710c5fdc9">Derivation::finish</a>(<a class="code" href="classMiniSat_1_1Clause.html">Clause</a>* clause, <a class="code" href="classMiniSat_1_1Solver.html">Solver</a>* solver) {
<a name="l00116"></a>00116 <a class="code" href="debug_8h.html#a2637b2fffa22e3c9fad40cda8fcc3bce" title="If something goes horribly wrong, print a message and abort immediately with exit(1).">FatalAssert</a>(clause != NULL, <span class="stringliteral">"MiniSat::derivation:finish:"</span>);
<a name="l00117"></a>00117
<a name="l00118"></a>00118 <span class="comment">// already the empty clause</span>
<a name="l00119"></a>00119 <span class="keywordflow">if</span> (clause-><a class="code" href="classMiniSat_1_1Clause.html#adf5aa50a639b4b5bb71e5ea76d45b8e2">size</a>() == 0) {
<a name="l00120"></a>00120 d_emptyClause = clause;
<a name="l00121"></a>00121 }
<a name="l00122"></a>00122 <span class="comment">// derive the empty clause</span>
<a name="l00123"></a>00123 <span class="keywordflow">else</span> {
<a name="l00124"></a>00124 <a class="code" href="classMiniSat_1_1Inference.html">Inference</a>* inference = <span class="keyword">new</span> <a class="code" href="classMiniSat_1_1Inference.html">Inference</a>(clause-><a class="code" href="classMiniSat_1_1Clause.html#aeb8881da1f982f5bc58bac190ab2f2a4">id</a>());
<a name="l00125"></a>00125 <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < clause-><a class="code" href="classMiniSat_1_1Clause.html#adf5aa50a639b4b5bb71e5ea76d45b8e2">size</a>(); ++i) {
<a name="l00126"></a>00126 <a class="code" href="classMiniSat_1_1Lit.html">Lit</a> lit((*clause)[i]);
<a name="l00127"></a>00127 inference-><a class="code" href="classMiniSat_1_1Inference.html#a61184032373fe3049198f8e3a71e436f">add</a>(lit, computeRootReason(~lit, solver));
<a name="l00128"></a>00128 }
<a name="l00129"></a>00129 vector<Lit> literals;
<a name="l00130"></a>00130 <a class="code" href="classMiniSat_1_1Clause.html">Clause</a>* empty = <a class="code" href="namespaceMiniSat.html#a9a3ff2cc55978ca3a973861cad2814e2">Clause_new</a>(literals, <a class="code" href="classCVC3_1_1Theorem.html">CVC3::Theorem</a>(), solver-><a class="code" href="classMiniSat_1_1Solver.html#a7323aff4aaa93c01e6008e8e033d2b8f">nextClauseID</a>());
<a name="l00131"></a>00131 removedClause(empty);
<a name="l00132"></a>00132 d_emptyClause = empty;
<a name="l00133"></a>00133 registerClause(empty);
<a name="l00134"></a>00134 registerInference(empty-><a class="code" href="classMiniSat_1_1Clause.html#aeb8881da1f982f5bc58bac190ab2f2a4">id</a>(), inference);
<a name="l00135"></a>00135 }
<a name="l00136"></a>00136
<a name="l00137"></a>00137 checkDerivation(clause);
<a name="l00138"></a>00138 <a class="code" href="debug_8h.html#a600cb2d68efe7cc413cccbb5714c7016">IF_DEBUG</a> (checkDerivation(clause));
<a name="l00139"></a>00139
<a name="l00140"></a>00140 <span class="comment">// cout << "PROOF_START" << endl;</span>
<a name="l00141"></a>00141 <span class="comment">// printDerivation();</span>
<a name="l00142"></a>00142 <span class="comment">// cout << "PROOF_END" << endl;</span>
<a name="l00143"></a>00143
<a name="l00144"></a>00144 }
<a name="l00145"></a>00145
<a name="l00146"></a>00146
<a name="l00147"></a>00147
<a name="l00148"></a><a class="code" href="classMiniSat_1_1Derivation.html#ac419e5de02d38bdc729487c82fa93de2">00148</a> <span class="keywordtype">void</span> <a class="code" href="classMiniSat_1_1Derivation.html#ac419e5de02d38bdc729487c82fa93de2">Derivation::checkDerivation</a>(<a class="code" href="classMiniSat_1_1Clause.html">Clause</a>* clause) {
<a name="l00149"></a>00149 <span class="comment">// find all relevant clauses</span>
<a name="l00150"></a>00150
<a name="l00151"></a>00151 <span class="comment">// - relevant: set clauses used in derivation</span>
<a name="l00152"></a>00152 <span class="comment">// - regress: relevant clauses whose antecedents have to be checked</span>
<a name="l00153"></a>00153 std::set<int> relevant;
<a name="l00154"></a>00154 std::set<int> regress;
<a name="l00155"></a>00155
<a name="l00156"></a>00156 regress.insert(clause-><a class="code" href="classMiniSat_1_1Clause.html#aeb8881da1f982f5bc58bac190ab2f2a4">id</a>());
<a name="l00157"></a>00157 <span class="keywordflow">while</span> (!regress.empty()) {
<a name="l00158"></a>00158 <span class="comment">// pick next clause to derive - start from bottom, i.e. latest derived clause</span>
<a name="l00159"></a>00159 <span class="keywordtype">int</span> clauseID = *(regress.rbegin());
<a name="l00160"></a>00160 regress.erase(clauseID);
<a name="l00161"></a>00161
<a name="l00162"></a>00162 <span class="comment">// move to clauses relevant for the derivation</span>
<a name="l00163"></a>00163 <a class="code" href="debug_8h.html#a2637b2fffa22e3c9fad40cda8fcc3bce" title="If something goes horribly wrong, print a message and abort immediately with exit(1).">FatalAssert</a>(relevant.count(clauseID) == 0, <span class="stringliteral">"Solver::printProof: already in relevant"</span>);
<a name="l00164"></a>00164 relevant.insert(clauseID);
<a name="l00165"></a>00165
<a name="l00166"></a>00166 <span class="comment">// process antecedents</span>
<a name="l00167"></a>00167 <a class="code" href="classHash_1_1hash__map.html#a34789fb591a84314e78bd17b69aa6065">TInferences::const_iterator</a> iter = d_inferences.find(clauseID);
<a name="l00168"></a>00168 <span class="comment">// input clause</span>
<a name="l00169"></a>00169 <span class="keywordflow">if</span> (iter == d_inferences.end()) {
<a name="l00170"></a>00170 <a class="code" href="debug_8h.html#a2637b2fffa22e3c9fad40cda8fcc3bce" title="If something goes horribly wrong, print a message and abort immediately with exit(1).">FatalAssert</a>(d_inputClauses.contains(clauseID),
<a name="l00171"></a>00171 <span class="stringliteral">"Solver::printProof: clause without antecedents is not marked as input clause"</span>);
<a name="l00172"></a>00172 }
<a name="l00173"></a>00173
<a name="l00174"></a>00174 <span class="keywordflow">else</span> {
<a name="l00175"></a>00175 <a class="code" href="classMiniSat_1_1Inference.html">Inference</a>* inference = iter->second;
<a name="l00176"></a>00176 regress.insert(inference-><a class="code" href="classMiniSat_1_1Inference.html#a932d4071d9f794757ad9db27cb3fd1a3">getStart</a>());
<a name="l00177"></a>00177 <span class="keyword">const</span> <a class="code" href="classMiniSat_1_1Inference.html#a0eef845f209a9bc406fe887c34f82553">Inference::TSteps</a>& steps = inference-><a class="code" href="classMiniSat_1_1Inference.html#a4111b13d1401b38cbe749357793883fa">getSteps</a>();
<a name="l00178"></a>00178 <span class="keywordflow">for</span> (Inference::TSteps::const_iterator step = steps.begin(); step != steps.end(); ++step) {
<a name="l00179"></a>00179 regress.insert(step->second);
<a name="l00180"></a>00180 }
<a name="l00181"></a>00181 }
<a name="l00182"></a>00182 }
<a name="l00183"></a>00183
<a name="l00184"></a>00184
<a name="l00185"></a>00185 <span class="comment">// check derivation</span>
<a name="l00186"></a>00186 <span class="keywordflow">for</span> (std::set<int>::iterator i = relevant.begin(); i != relevant.end(); ++i) {
<a name="l00187"></a>00187 <span class="keywordtype">int</span> clauseID = *i;
<a name="l00188"></a>00188 <a class="code" href="debug_8h.html#a2637b2fffa22e3c9fad40cda8fcc3bce" title="If something goes horribly wrong, print a message and abort immediately with exit(1).">FatalAssert</a>(d_clauses.contains(clauseID),
<a name="l00189"></a>00189 <span class="stringliteral">"MiniSat::Derivation::printProof: clause id in proof is not in clauses"</span>);
<a name="l00190"></a>00190 <a class="code" href="classMiniSat_1_1Clause.html">Clause</a>* clause = d_clauses.find(clauseID)->second;
<a name="l00191"></a>00191
<a name="l00192"></a>00192 <a class="code" href="classMiniSat_1_1Inference.html">Inference</a>* inference = NULL;
<a name="l00193"></a>00193 <a class="code" href="classHash_1_1hash__map.html#a34789fb591a84314e78bd17b69aa6065">TInferences::const_iterator</a> j = d_inferences.find(clauseID);
<a name="l00194"></a>00194 <span class="keywordflow">if</span> (j != d_inferences.end()) {
<a name="l00195"></a>00195 inference = j->second;
<a name="l00196"></a>00196 }
<a name="l00197"></a>00197
<a name="l00198"></a>00198 <a class="code" href="debug_8h.html#a2637b2fffa22e3c9fad40cda8fcc3bce" title="If something goes horribly wrong, print a message and abort immediately with exit(1).">FatalAssert</a>(inference != NULL || d_inputClauses.contains(clauseID),
<a name="l00199"></a>00199 <span class="stringliteral">"MiniSat::Derivation::printProof: derivation of input clause"</span>);
<a name="l00200"></a>00200 <a class="code" href="debug_8h.html#a2637b2fffa22e3c9fad40cda8fcc3bce" title="If something goes horribly wrong, print a message and abort immediately with exit(1).">FatalAssert</a>(inference == NULL || !d_inputClauses.contains(clauseID),
<a name="l00201"></a>00201 <span class="stringliteral">"MiniSat::Derivation::printProof: no derivation for derived clause"</span>);
<a name="l00202"></a>00202
<a name="l00203"></a>00203 <span class="keywordflow">if</span> (inference != NULL) {
<a name="l00204"></a>00204 <span class="comment">// cout << "Regress: " << clause->id() << " : " << clause->toString() << endl;</span>
<a name="l00205"></a>00205 <a class="code" href="debug_8h.html#a2637b2fffa22e3c9fad40cda8fcc3bce" title="If something goes horribly wrong, print a message and abort immediately with exit(1).">FatalAssert</a>(d_clauses.find(inference-><a class="code" href="classMiniSat_1_1Inference.html#a932d4071d9f794757ad9db27cb3fd1a3">getStart</a>()) != d_clauses.end(),
<a name="l00206"></a>00206 <span class="stringliteral">"MiniSat::Derivation::printProof: first not in clauses"</span>);
<a name="l00207"></a>00207
<a name="l00208"></a>00208 <a class="code" href="classMiniSat_1_1Clause.html">Clause</a>* first = d_clauses.find(inference-><a class="code" href="classMiniSat_1_1Inference.html#a932d4071d9f794757ad9db27cb3fd1a3">getStart</a>())->second;
<a name="l00209"></a>00209 <span class="comment">// cout << "Derived from : " << first->id() << " : " << first->toString() << endl;</span>
<a name="l00210"></a>00210
<a name="l00211"></a>00211 set<Lit> derived;
<a name="l00212"></a>00212 <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < first->size(); ++i) {
<a name="l00213"></a>00213 derived.insert((*first)[i]);
<a name="l00214"></a>00214 }
<a name="l00215"></a>00215
<a name="l00216"></a>00216 <span class="comment">// retrace derivation</span>
<a name="l00217"></a>00217 <span class="keywordflow">for</span> (Inference::TSteps::const_iterator step = inference-><a class="code" href="classMiniSat_1_1Inference.html#a4111b13d1401b38cbe749357793883fa">getSteps</a>().begin();
<a name="l00218"></a>00218 step != inference-><a class="code" href="classMiniSat_1_1Inference.html#a4111b13d1401b38cbe749357793883fa">getSteps</a>().end(); ++step) {
<a name="l00219"></a>00219 <a class="code" href="classMiniSat_1_1Lit.html">Lit</a> lit = step->first;
<a name="l00220"></a>00220 <span class="comment">// cout << " over " << lit.toString() << endl;</span>
<a name="l00221"></a>00221 <span class="comment">// cout << "Derived from ... : " << step->second << " : " << d_clauses.find(step->second)->second->toString() << endl;</span>
<a name="l00222"></a>00222
<a name="l00223"></a>00223 <a class="code" href="debug_8h.html#a2637b2fffa22e3c9fad40cda8fcc3bce" title="If something goes horribly wrong, print a message and abort immediately with exit(1).">FatalAssert</a>(d_clauses.find(step->second) != d_clauses.end(),
<a name="l00224"></a>00224 <span class="stringliteral">"MiniSat::Derivation::printProof: next not in clauses"</span>);
<a name="l00225"></a>00225 <a class="code" href="classMiniSat_1_1Clause.html">Clause</a>* next = d_clauses.find(step->second)->second;
<a name="l00226"></a>00226
<a name="l00227"></a>00227 <a class="code" href="debug_8h.html#a2637b2fffa22e3c9fad40cda8fcc3bce" title="If something goes horribly wrong, print a message and abort immediately with exit(1).">FatalAssert</a>(derived.find(lit) != derived.end(),
<a name="l00228"></a>00228 <span class="stringliteral">"MiniSat::Derivation::printProof: lit not in derived"</span>);
<a name="l00229"></a>00229 <a class="code" href="debug_8h.html#a2637b2fffa22e3c9fad40cda8fcc3bce" title="If something goes horribly wrong, print a message and abort immediately with exit(1).">FatalAssert</a>(next->contains(~lit),
<a name="l00230"></a>00230 <span class="stringliteral">"MiniSat::Derivation::printProof: ~lit not in next"</span>);
<a name="l00231"></a>00231
<a name="l00232"></a>00232 derived.erase(lit);
<a name="l00233"></a>00233 <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < next->size(); ++i) {
<a name="l00234"></a>00234 <span class="keywordflow">if</span> ((*next)[i] != ~lit) {
<a name="l00235"></a>00235 derived.insert((*next)[i]);
<a name="l00236"></a>00236 }
<a name="l00237"></a>00237 }
<a name="l00238"></a>00238 }
<a name="l00239"></a>00239
<a name="l00240"></a>00240 <span class="comment">// check that we got the expected clause</span>
<a name="l00241"></a>00241 <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < clause->size(); ++i) {
<a name="l00242"></a>00242 <a class="code" href="debug_8h.html#a2637b2fffa22e3c9fad40cda8fcc3bce" title="If something goes horribly wrong, print a message and abort immediately with exit(1).">FatalAssert</a>(derived.find((*clause)[i]) != derived.end(),
<a name="l00243"></a>00243 <span class="stringliteral">"MiniSat::Derivation::printProof: didn't derive expected clause"</span>);
<a name="l00244"></a>00244 derived.erase((*clause)[i]);
<a name="l00245"></a>00245 }
<a name="l00246"></a>00246 <a class="code" href="debug_8h.html#a2637b2fffa22e3c9fad40cda8fcc3bce" title="If something goes horribly wrong, print a message and abort immediately with exit(1).">FatalAssert</a>(derived.empty(),
<a name="l00247"></a>00247 <span class="stringliteral">"MiniSat::Derivation::printProof: didn't derive expected clause 2"</span>);
<a name="l00248"></a>00248 };
<a name="l00249"></a>00249 }
<a name="l00250"></a>00250 }
<a name="l00251"></a>00251
<a name="l00252"></a>00252
<a name="l00253"></a><a class="code" href="classMiniSat_1_1Derivation.html#a5436a42caaab1bf37d9355c5bd43d251">00253</a> <a class="code" href="classSAT_1_1SatProof.html">SAT::SatProof</a>* <a class="code" href="classMiniSat_1_1Derivation.html#a5436a42caaab1bf37d9355c5bd43d251">Derivation::createProof</a>() {
<a name="l00254"></a>00254 <a class="code" href="debug_8h.html#a2637b2fffa22e3c9fad40cda8fcc3bce" title="If something goes horribly wrong, print a message and abort immediately with exit(1).">FatalAssert</a>(d_emptyClause != NULL, <span class="stringliteral">"MiniSat::Derivation:createProof: no empty clause"</span>);
<a name="l00255"></a>00255 <a class="code" href="debug_8h.html#a2637b2fffa22e3c9fad40cda8fcc3bce" title="If something goes horribly wrong, print a message and abort immediately with exit(1).">FatalAssert</a>(d_emptyClause->size() == 0,
<a name="l00256"></a>00256 <span class="stringliteral">"MiniSat::Derivation:createProof: empty clause is not empty"</span>);
<a name="l00257"></a>00257 <span class="keywordflow">return</span> createProof(d_emptyClause);
<a name="l00258"></a>00258 }
<a name="l00259"></a>00259
<a name="l00260"></a><a class="code" href="classMiniSat_1_1Derivation.html#ad10061dacbd2acbcbd3c777f9fe3707b">00260</a> <a class="code" href="classSAT_1_1SatProof.html">SAT::SatProof</a>* <a class="code" href="classMiniSat_1_1Derivation.html#a5436a42caaab1bf37d9355c5bd43d251">Derivation::createProof</a>(<a class="code" href="classMiniSat_1_1Clause.html">Clause</a>* clause) {
<a name="l00261"></a>00261 checkDerivation(clause);
<a name="l00262"></a>00262 <span class="comment">// IF_DEBUG (checkDerivation(clause));</span>
<a name="l00263"></a>00263
<a name="l00264"></a>00264 <span class="comment">// find all relevant clauses</span>
<a name="l00265"></a>00265
<a name="l00266"></a>00266 <span class="comment">// - relevant: set clauses used in derivation</span>
<a name="l00267"></a>00267 <span class="comment">// - regress: relevant clauses whose antecedents have to be checked</span>
<a name="l00268"></a>00268 std::set<int> relevant;
<a name="l00269"></a>00269 std::set<int> regress;
<a name="l00270"></a>00270 regress.insert(clause-><a class="code" href="classMiniSat_1_1Clause.html#aeb8881da1f982f5bc58bac190ab2f2a4">id</a>());
<a name="l00271"></a>00271 <span class="keywordflow">while</span> (!regress.empty()) {
<a name="l00272"></a>00272 <span class="comment">// pick next clause to derive - start from bottom, i.e. latest derived clause</span>
<a name="l00273"></a>00273 <span class="keywordtype">int</span> clauseID = *(regress.rbegin());
<a name="l00274"></a>00274 regress.erase(clauseID);
<a name="l00275"></a>00275 relevant.insert(clauseID);
<a name="l00276"></a>00276
<a name="l00277"></a>00277 <span class="comment">// process antecedents</span>
<a name="l00278"></a>00278 <a class="code" href="classHash_1_1hash__map.html#a34789fb591a84314e78bd17b69aa6065">TInferences::const_iterator</a> iter = d_inferences.find(clauseID);
<a name="l00279"></a>00279 <span class="comment">// input clause</span>
<a name="l00280"></a>00280 <span class="keywordflow">if</span> (iter != d_inferences.end()) {
<a name="l00281"></a>00281 <a class="code" href="classMiniSat_1_1Inference.html">Inference</a>* inference = iter->second;
<a name="l00282"></a>00282 regress.insert(inference-><a class="code" href="classMiniSat_1_1Inference.html#a932d4071d9f794757ad9db27cb3fd1a3">getStart</a>());
<a name="l00283"></a>00283 <span class="keyword">const</span> <a class="code" href="classMiniSat_1_1Inference.html#a0eef845f209a9bc406fe887c34f82553">Inference::TSteps</a>& steps = inference-><a class="code" href="classMiniSat_1_1Inference.html#a4111b13d1401b38cbe749357793883fa">getSteps</a>();
<a name="l00284"></a>00284 <span class="keywordflow">for</span> (Inference::TSteps::const_iterator step = steps.begin(); step != steps.end(); ++step) {
<a name="l00285"></a>00285 regress.insert(step->second);
<a name="l00286"></a>00286 }
<a name="l00287"></a>00287 }
<a name="l00288"></a>00288 }
<a name="l00289"></a>00289
<a name="l00290"></a>00290 <span class="comment">// create proof</span>
<a name="l00291"></a>00291 <a class="code" href="classSAT_1_1SatProof.html">SAT::SatProof</a>* proof = <span class="keyword">new</span> <a class="code" href="classSAT_1_1SatProof.html">SAT::SatProof</a>();
<a name="l00292"></a>00292 <a class="code" href="classHash_1_1hash__map.html">std::hash_map<int, SAT::SatProofNode*></a> proofNodes;
<a name="l00293"></a>00293
<a name="l00294"></a>00294 <span class="keywordflow">for</span> (std::set<int>::iterator i = relevant.begin(); i != relevant.end(); ++i) {
<a name="l00295"></a>00295 <span class="keywordtype">int</span> clauseID = *i;
<a name="l00296"></a>00296 <a class="code" href="classMiniSat_1_1Clause.html">Clause</a>* clause = d_clauses.find(clauseID)->second;
<a name="l00297"></a>00297
<a name="l00298"></a>00298 <a class="code" href="classMiniSat_1_1Inference.html">Inference</a>* inference = NULL;
<a name="l00299"></a>00299 <a class="code" href="classHash_1_1hash__map.html#a34789fb591a84314e78bd17b69aa6065">TInferences::const_iterator</a> j = d_inferences.find(clauseID);
<a name="l00300"></a>00300 <span class="keywordflow">if</span> (j == d_inferences.end()) {
<a name="l00301"></a>00301 <span class="comment">/*</span>
<a name="l00302"></a>00302 <span class="comment"><<<<<<< minisat_derivation.cpp</span>
<a name="l00303"></a>00303 <span class="comment"> FatalAssert(clause->getCvcClause() != NULL, "createProof: leaf without clause");</span>
<a name="l00304"></a>00304 <span class="comment"> FatalAssert(clause->getCvcClause() != NULL, "createProof: leaf without clause");</span>
<a name="l00305"></a>00305 <span class="comment"> proofNodes[clause->id()] = proof->registerLeaf(clause->getCvcClause());</span>
<a name="l00306"></a>00306 <span class="comment"> // cout<<"cluase with :" << clause->id() << " ---> " ;</span>
<a name="l00307"></a>00307 <span class="comment"> // clause->getCvcClause()->print();</span>
<a name="l00308"></a>00308 <span class="comment"> // cout << endl;</span>
<a name="l00309"></a>00309 <span class="comment">=======</span>
<a name="l00310"></a>00310 <span class="comment"> */</span>
<a name="l00311"></a>00311 <a class="code" href="debug_8h.html#a2637b2fffa22e3c9fad40cda8fcc3bce" title="If something goes horribly wrong, print a message and abort immediately with exit(1).">FatalAssert</a>(!clause-><a class="code" href="classMiniSat_1_1Clause.html#a16f3db82b77ca7e28752602bf1dc8177">getTheorem</a>().<a class="code" href="classCVC3_1_1Theorem.html#afc6fdb0507eb3669e28d9be5ed0bd333">isNull</a>(), <span class="stringliteral">"createProof: leaf without clause"</span>);
<a name="l00312"></a>00312 proofNodes[clause-><a class="code" href="classMiniSat_1_1Clause.html#aeb8881da1f982f5bc58bac190ab2f2a4">id</a>()] = proof-><a class="code" href="classSAT_1_1SatProof.html#a36554406554d1f6ea793c98b104bd071">registerLeaf</a>(clause-><a class="code" href="classMiniSat_1_1Clause.html#a16f3db82b77ca7e28752602bf1dc8177">getTheorem</a>());
<a name="l00313"></a>00313 <span class="comment">/*</span>
<a name="l00314"></a>00314 <span class="comment">>>>>>>> 1.9</span>
<a name="l00315"></a>00315 <span class="comment"> */</span>
<a name="l00316"></a>00316 }
<a name="l00317"></a>00317
<a name="l00318"></a>00318 <span class="keywordflow">else</span> {
<a name="l00319"></a>00319 inference = j->second;
<a name="l00320"></a>00320 <a class="code" href="debug_8h.html#a2637b2fffa22e3c9fad40cda8fcc3bce" title="If something goes horribly wrong, print a message and abort immediately with exit(1).">FatalAssert</a>(proofNodes.<a class="code" href="classHash_1_1hash__map.html#a48feee7c5690c9cd9ba1b0817ca3ae9f" title="status">contains</a>(inference-><a class="code" href="classMiniSat_1_1Inference.html#a932d4071d9f794757ad9db27cb3fd1a3">getStart</a>()), <span class="stringliteral">"createProof: contains inference start"</span>);
<a name="l00321"></a>00321 <a class="code" href="classSAT_1_1SatProofNode.html">SAT::SatProofNode</a>* <a class="code" href="namespaceMiniSat.html#ad93cb56673487974071ed3b75bf4ea83">left</a> = proofNodes.<a class="code" href="classHash_1_1hash__map.html#af3317f9087a35d09985b6513c45d2ab8" title="operations">find</a>(inference-><a class="code" href="classMiniSat_1_1Inference.html#a932d4071d9f794757ad9db27cb3fd1a3">getStart</a>())->second;
<a name="l00322"></a>00322 <span class="keyword">const</span> <a class="code" href="classMiniSat_1_1Inference.html#a0eef845f209a9bc406fe887c34f82553">Inference::TSteps</a>& steps = inference-><a class="code" href="classMiniSat_1_1Inference.html#a4111b13d1401b38cbe749357793883fa">getSteps</a>();
<a name="l00323"></a>00323 <span class="keywordflow">for</span> (Inference::TSteps::const_iterator step = steps.begin(); step != steps.end(); ++step) {
<a name="l00324"></a>00324 <a class="code" href="debug_8h.html#a2637b2fffa22e3c9fad40cda8fcc3bce" title="If something goes horribly wrong, print a message and abort immediately with exit(1).">FatalAssert</a>(proofNodes.<a class="code" href="classHash_1_1hash__map.html#a48feee7c5690c9cd9ba1b0817ca3ae9f" title="status">contains</a>(step->second), <span class="stringliteral">"createProof: contains inference start"</span>);
<a name="l00325"></a>00325 <a class="code" href="classSAT_1_1SatProofNode.html">SAT::SatProofNode</a>* <a class="code" href="namespaceMiniSat.html#a82558b7a36c52f5d3211d5d14bed99d4">right</a> = proofNodes.<a class="code" href="classHash_1_1hash__map.html#af3317f9087a35d09985b6513c45d2ab8" title="operations">find</a>(step->second)->second;
<a name="l00326"></a>00326 left = proof-><a class="code" href="classSAT_1_1SatProof.html#a95ddb594997f8a50a62b277f1db6c1aa">registerNode</a>(left, right, <a class="code" href="namespaceMiniSat.html#a72756c106b9bd53cf77c2aab214e7cf5">miniSatToCVC</a>(step->first));
<a name="l00327"></a>00327 }
<a name="l00328"></a>00328 proofNodes[clause-><a class="code" href="classMiniSat_1_1Clause.html#aeb8881da1f982f5bc58bac190ab2f2a4">id</a>()] = <a class="code" href="namespaceMiniSat.html#ad93cb56673487974071ed3b75bf4ea83">left</a>;
<a name="l00329"></a>00329 }
<a name="l00330"></a>00330 }
<a name="l00331"></a>00331 proof-><a class="code" href="classSAT_1_1SatProof.html#a0eba2c0baf1019cef7b96b5af3e2aa5c">setRoot</a>(proofNodes[clause-><a class="code" href="classMiniSat_1_1Clause.html#aeb8881da1f982f5bc58bac190ab2f2a4">id</a>()]);
<a name="l00332"></a>00332 <span class="keywordflow">return</span> proof;
<a name="l00333"></a>00333 }
<a name="l00334"></a>00334
<a name="l00335"></a>00335
<a name="l00336"></a><a class="code" href="classMiniSat_1_1Derivation.html#aec406575f21e97084cffa7c05b566833">00336</a> <span class="keywordtype">void</span> <a class="code" href="classMiniSat_1_1Derivation.html#aec406575f21e97084cffa7c05b566833">Derivation::printDerivation</a>() {
<a name="l00337"></a>00337 <a class="code" href="debug_8h.html#a2637b2fffa22e3c9fad40cda8fcc3bce" title="If something goes horribly wrong, print a message and abort immediately with exit(1).">FatalAssert</a>(d_emptyClause != NULL, <span class="stringliteral">"MiniSat::Derivation:printDerivation: no empty clause"</span>);
<a name="l00338"></a>00338 <a class="code" href="debug_8h.html#a2637b2fffa22e3c9fad40cda8fcc3bce" title="If something goes horribly wrong, print a message and abort immediately with exit(1).">FatalAssert</a>(d_emptyClause->size() == 0,
<a name="l00339"></a>00339 <span class="stringliteral">"MiniSat::Derivation:printDerivation: empty clause is not empty"</span>);
<a name="l00340"></a>00340 printDerivation(d_emptyClause);
<a name="l00341"></a>00341 }
<a name="l00342"></a>00342
<a name="l00343"></a><a class="code" href="classMiniSat_1_1Derivation.html#a8bb228e6baaead5ff5122a65fa64b123">00343</a> <span class="keywordtype">void</span> <a class="code" href="classMiniSat_1_1Derivation.html#aec406575f21e97084cffa7c05b566833">Derivation::printDerivation</a>(<a class="code" href="classMiniSat_1_1Clause.html">Clause</a>* clause) {
<a name="l00344"></a>00344 <a class="code" href="debug_8h.html#a600cb2d68efe7cc413cccbb5714c7016">IF_DEBUG</a> (checkDerivation(clause));
<a name="l00345"></a>00345
<a name="l00346"></a>00346 <span class="comment">// find all relevant clauses</span>
<a name="l00347"></a>00347
<a name="l00348"></a>00348 <span class="comment">// - relevant: set clauses used in derivation</span>
<a name="l00349"></a>00349 <span class="comment">// - regress: relevant clauses whose antecedents have to be checked</span>
<a name="l00350"></a>00350 std::set<int> relevant;
<a name="l00351"></a>00351 std::set<int> regress;
<a name="l00352"></a>00352
<a name="l00353"></a>00353 regress.insert(clause-><a class="code" href="classMiniSat_1_1Clause.html#aeb8881da1f982f5bc58bac190ab2f2a4">id</a>());
<a name="l00354"></a>00354 <span class="keywordflow">while</span> (!regress.empty()) {
<a name="l00355"></a>00355 <span class="comment">// pick next clause to derive - start from bottom, i.e. latest derived clause</span>
<a name="l00356"></a>00356 <span class="keywordtype">int</span> clauseID = *(regress.rbegin());
<a name="l00357"></a>00357 regress.erase(clauseID);
<a name="l00358"></a>00358
<a name="l00359"></a>00359 <span class="comment">// move to clauses relevant for the derivation</span>
<a name="l00360"></a>00360 relevant.insert(clauseID);
<a name="l00361"></a>00361
<a name="l00362"></a>00362 <span class="comment">// process antecedents</span>
<a name="l00363"></a>00363 <a class="code" href="classHash_1_1hash__map.html#a34789fb591a84314e78bd17b69aa6065">TInferences::const_iterator</a> iter = d_inferences.find(clauseID);
<a name="l00364"></a>00364 <span class="comment">// input clause</span>
<a name="l00365"></a>00365 <span class="keywordflow">if</span> (iter != d_inferences.end()) {
<a name="l00366"></a>00366 <a class="code" href="classMiniSat_1_1Inference.html">Inference</a>* inference = iter->second;
<a name="l00367"></a>00367 regress.insert(inference-><a class="code" href="classMiniSat_1_1Inference.html#a932d4071d9f794757ad9db27cb3fd1a3">getStart</a>());
<a name="l00368"></a>00368 <span class="keyword">const</span> <a class="code" href="classMiniSat_1_1Inference.html#a0eef845f209a9bc406fe887c34f82553">Inference::TSteps</a>& steps = inference-><a class="code" href="classMiniSat_1_1Inference.html#a4111b13d1401b38cbe749357793883fa">getSteps</a>();
<a name="l00369"></a>00369 <span class="keywordflow">for</span> (Inference::TSteps::const_iterator step = steps.begin(); step != steps.end(); ++step) {
<a name="l00370"></a>00370 regress.insert(step->second);
<a name="l00371"></a>00371 }
<a name="l00372"></a>00372 }
<a name="l00373"></a>00373 }
<a name="l00374"></a>00374
<a name="l00375"></a>00375
<a name="l00376"></a>00376 <span class="comment">// print proof</span>
<a name="l00377"></a>00377 <span class="keywordflow">for</span> (std::set<int>::iterator i = relevant.begin(); i != relevant.end(); ++i) {
<a name="l00378"></a>00378 <span class="keywordtype">int</span> clauseID = *i;
<a name="l00379"></a>00379 <a class="code" href="classMiniSat_1_1Clause.html">Clause</a>* clause = d_clauses.find(clauseID)->second;
<a name="l00380"></a>00380
<a name="l00381"></a>00381 <a class="code" href="classMiniSat_1_1Inference.html">Inference</a>* inference = NULL;
<a name="l00382"></a>00382 <a class="code" href="classHash_1_1hash__map.html#a34789fb591a84314e78bd17b69aa6065">TInferences::const_iterator</a> j = d_inferences.find(clauseID);
<a name="l00383"></a>00383 <span class="keywordflow">if</span> (j != d_inferences.end()) {
<a name="l00384"></a>00384 inference = j->second;
<a name="l00385"></a>00385 }
<a name="l00386"></a>00386
<a name="l00387"></a>00387 <span class="comment">// ID D : L1 ... Ln : C1 K1 C2 K2 ... Cm</span>
<a name="l00388"></a>00388 cout << clauseID;
<a name="l00389"></a>00389 <span class="comment">// input clause or derived clause?</span>
<a name="l00390"></a>00390 <span class="keywordflow">if</span> (d_inputClauses.contains(clauseID)) {
<a name="l00391"></a>00391 cout << <span class="stringliteral">" I "</span>;
<a name="l00392"></a>00392 } <span class="keywordflow">else</span> {
<a name="l00393"></a>00393 cout << <span class="stringliteral">" D "</span>;
<a name="l00394"></a>00394 }
<a name="l00395"></a>00395 cout << <span class="stringliteral">": "</span> << clause-><a class="code" href="classMiniSat_1_1Clause.html#a8c3dce1547e9734868eef94f91f978e1">toString</a>() << <span class="stringliteral">" : "</span>;
<a name="l00396"></a>00396 <span class="keywordflow">if</span> (inference != NULL) cout << inference-><a class="code" href="classMiniSat_1_1Inference.html#aacd9c375bc7b8b0d87a15bcd9b5d35ce">toString</a>();
<a name="l00397"></a>00397 cout << <a class="code" href="group__ExprStream__Manip.html#ga05b0ea7353ec24fa8e7e272d7a7875d8" title="Print the end-of-line.">endl</a>;
<a name="l00398"></a>00398 }
<a name="l00399"></a>00399 }
<a name="l00400"></a>00400
<a name="l00401"></a>00401
<a name="l00402"></a><a class="code" href="classMiniSat_1_1Derivation.html#a9b35e97fb7ff5de171eeb68bfe4dda6b">00402</a> <span class="keywordtype">void</span> <a class="code" href="group__ExprStream__Manip.html#ga2a0348c6d3f94f2f8febc6dd0a9c3218" title="Set the indentation to the current position.">Derivation::push</a>(<span class="keywordtype">int</span> clauseID) {
<a name="l00403"></a>00403 <span class="comment">// cout << "derivation push: " << clauseID << endl;</span>
<a name="l00404"></a>00404 }
<a name="l00405"></a>00405
<a name="l00406"></a><a class="code" href="classMiniSat_1_1Derivation.html#af3782033a2412734e9a018877f71ce5d">00406</a> <span class="keywordtype">void</span> <a class="code" href="group__ExprStream__Manip.html#gaddb050a787be87116afc51791293d3be" title="Restore the indentation.">Derivation::pop</a>(<span class="keywordtype">int</span> clauseID) {
<a name="l00407"></a>00407 <span class="comment">// cout << "derivation pop: " << clauseID << endl;</span>
<a name="l00408"></a>00408 <span class="comment">// remove all popped clauses</span>
<a name="l00409"></a>00409 <a class="code" href="classHash_1_1hash__map.html#a34789fb591a84314e78bd17b69aa6065">TClauses::const_iterator</a> i = d_clauses.begin();
<a name="l00410"></a>00410 <span class="keywordflow">while</span> (i != d_clauses.end()) {
<a name="l00411"></a>00411 <a class="code" href="classMiniSat_1_1Clause.html">Clause</a>* clause = (*i).second;
<a name="l00412"></a>00412 <span class="keywordflow">if</span> (
<a name="l00413"></a>00413 <span class="comment">// Warning: clause removal needs to be done</span>
<a name="l00414"></a>00414 <span class="comment">// exactly the same way in minisat_solver!!!</span>
<a name="l00415"></a>00415
<a name="l00416"></a>00416 <span class="comment">// remove theory lemmas</span>
<a name="l00417"></a>00417 <span class="comment">// :TODO: can't do that: kept lemmas might depend on them </span>
<a name="l00418"></a>00418 <span class="comment">// (!clause->learnt() && clause->pushID() < 0)</span>
<a name="l00419"></a>00419 <span class="comment">// ||</span>
<a name="l00420"></a>00420 <span class="comment">// remove clauses added after the last push</span>
<a name="l00421"></a>00421 clause-><a class="code" href="classMiniSat_1_1Clause.html#ad5cd6daece979cb23f3c52ee0df63a0b">pushID</a>() > clauseID) {
<a name="l00422"></a>00422 <span class="keywordtype">int</span> <span class="keywordtype">id</span> = clause-><a class="code" href="classMiniSat_1_1Clause.html#aeb8881da1f982f5bc58bac190ab2f2a4">id</a>();
<a name="l00423"></a>00423 <span class="comment">// cout << "derivation pop now: " << id << endl;</span>
<a name="l00424"></a>00424 d_inputClauses.erase(<span class="keywordtype">id</span>);
<a name="l00425"></a>00425 d_inferences.erase(<span class="keywordtype">id</span>);
<a name="l00426"></a>00426
<a name="l00427"></a>00427 <span class="keywordflow">if</span> (clause-><a class="code" href="classMiniSat_1_1Clause.html#adf5aa50a639b4b5bb71e5ea76d45b8e2">size</a>() == 1) {
<a name="l00428"></a>00428 <span class="keywordtype">int</span> index = (*clause)[0].index();
<a name="l00429"></a>00429 <span class="keywordflow">if</span> (d_unitClauses.contains(index) && d_unitClauses[index] == clause) {
<a name="l00430"></a>00430 d_unitClauses.erase(index);
<a name="l00431"></a>00431 <a class="code" href="debug_8h.html#a2637b2fffa22e3c9fad40cda8fcc3bce" title="If something goes horribly wrong, print a message and abort immediately with exit(1).">FatalAssert</a>(!d_unitClauses.contains(index), <span class="stringliteral">"AHA"</span>);
<a name="l00432"></a>00432 }
<a name="l00433"></a>00433 }
<a name="l00434"></a>00434
<a name="l00435"></a>00435 i = d_clauses.erase(i);
<a name="l00436"></a>00436 }
<a name="l00437"></a>00437 <span class="keywordflow">else</span> {
<a name="l00438"></a>00438 ++i;
<a name="l00439"></a>00439 }
<a name="l00440"></a>00440 }
<a name="l00441"></a>00441
<a name="l00442"></a>00442 <span class="comment">// undo conflicting clause</span>
<a name="l00443"></a>00443 <span class="keywordflow">if</span> (d_emptyClause != NULL && d_emptyClause->pushID() > clauseID)
<a name="l00444"></a>00444 d_emptyClause = NULL;
<a name="l00445"></a>00445
<a name="l00446"></a>00446 <span class="comment">// delete popped and removed clauses</span>
<a name="l00447"></a>00447 std::deque<Clause*>::iterator j = d_removedClauses.begin();
<a name="l00448"></a>00448 <span class="keywordflow">while</span> (j != d_removedClauses.end()) {
<a name="l00449"></a>00449 <span class="keywordflow">if</span> ((*j)->pushID() > clauseID) {
<a name="l00450"></a>00450 <a class="code" href="namespaceMiniSat.html#acbe7b3fac8ab3909327207b0fea1f4d8">xfree</a>(*j);
<a name="l00451"></a>00451 j = d_removedClauses.erase(j);
<a name="l00452"></a>00452 } <span class="keywordflow">else</span> {
<a name="l00453"></a>00453 ++j;
<a name="l00454"></a>00454 }
<a name="l00455"></a>00455 }
<a name="l00456"></a>00456 }
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