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<div class="title">decision_engine_dfs.cpp</div> </div>
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<a href="decision__engine__dfs_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 decision_engine_dfs.cpp</span>
<a name="l00004"></a>00004 <span class="comment"> * \brief Decision Engine</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: Sun Jul 13 22:44:55 2003</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 <span class="comment">/*****************************************************************************/</span>
<a name="l00021"></a>00021
<a name="l00022"></a>00022
<a name="l00023"></a>00023 <span class="preprocessor">#include "<a class="code" href="decision__engine__dfs_8h.html">decision_engine_dfs.h</a>"</span>
<a name="l00024"></a>00024 <span class="preprocessor">#include "<a class="code" href="theory__core_8h.html">theory_core.h</a>"</span>
<a name="l00025"></a>00025 <span class="preprocessor">#include "<a class="code" href="search_8h.html" title="Abstract API to the proof search engine.">search.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
<a name="l00031"></a>00031
<a name="l00032"></a><a class="code" href="classCVC3_1_1DecisionEngineDFS.html#af7db0332174c8495ccf28d04def2ecd1">00032</a> <span class="keywordtype">bool</span> DecisionEngineDFS::isBetter(<span class="keyword">const</span> <a class="code" href="classCVC3_1_1Expr.html" title="Data structure of expressions in CVC3.">Expr</a>& e1, <span class="keyword">const</span> <a class="code" href="classCVC3_1_1Expr.html" title="Data structure of expressions in CVC3.">Expr</a>& e2)
<a name="l00033"></a>00033 {
<a name="l00034"></a>00034 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00035"></a>00035 }
<a name="l00036"></a>00036
<a name="l00037"></a>00037
<a name="l00038"></a>00038 <span class="comment">/*****************************************************************************/</span><span class="comment"></span>
<a name="l00039"></a>00039 <span class="comment">/*!</span>
<a name="l00040"></a>00040 <span class="comment"> * Function: DecisionEngineDFS::DecisionEngineDFS</span>
<a name="l00041"></a>00041 <span class="comment"> *</span>
<a name="l00042"></a>00042 <span class="comment"> * Author: Clark Barrett</span>
<a name="l00043"></a>00043 <span class="comment"> *</span>
<a name="l00044"></a>00044 <span class="comment"> * Created: Sun Jul 13 22:52:51 2003</span>
<a name="l00045"></a>00045 <span class="comment"> *</span>
<a name="l00046"></a>00046 <span class="comment"> * Constructor</span>
<a name="l00047"></a>00047 <span class="comment"> */</span>
<a name="l00048"></a>00048 <span class="comment">/*****************************************************************************/</span>
<a name="l00049"></a><a class="code" href="classCVC3_1_1DecisionEngineDFS.html#a5cd6174c6476f07e7cbb33fa3f805792">00049</a> DecisionEngineDFS::DecisionEngineDFS(<a class="code" href="classCVC3_1_1TheoryCore.html" title="This theory handles the built-in logical connectives plus equality. It also handles the registration ...">TheoryCore</a>* core, <a class="code" href="classCVC3_1_1SearchImplBase.html" title="API to to a generic proof search engine (a.k.a. SAT solver)">SearchImplBase</a>* se)
<a name="l00050"></a>00050 : <a class="code" href="classCVC3_1_1DecisionEngine.html">DecisionEngine</a>(core, se)
<a name="l00051"></a>00051 {
<a name="l00052"></a>00052 }
<a name="l00053"></a>00053
<a name="l00054"></a>00054
<a name="l00055"></a>00055 <span class="comment">/*****************************************************************************/</span><span class="comment"></span>
<a name="l00056"></a>00056 <span class="comment">/*!</span>
<a name="l00057"></a>00057 <span class="comment"> * Function: DecisionEngineDFS::findSplitter</span>
<a name="l00058"></a>00058 <span class="comment"> *</span>
<a name="l00059"></a>00059 <span class="comment"> * Author: Clark Barrett</span>
<a name="l00060"></a>00060 <span class="comment"> *</span>
<a name="l00061"></a>00061 <span class="comment"> * Created: Sun Jul 13 22:53:18 2003</span>
<a name="l00062"></a>00062 <span class="comment"> *</span>
<a name="l00063"></a>00063 <span class="comment"> * Main function to choose the next splitter.</span>
<a name="l00064"></a>00064 <span class="comment"> * \return NULL if all known splitters are assigned.</span>
<a name="l00065"></a>00065 <span class="comment"> */</span>
<a name="l00066"></a>00066 <span class="comment">/*****************************************************************************/</span>
<a name="l00067"></a><a class="code" href="classCVC3_1_1DecisionEngineDFS.html#afbb4011e6c9724af1fda70a63687f4d7">00067</a> <a class="code" href="classCVC3_1_1Expr.html" title="Data structure of expressions in CVC3.">Expr</a> <a class="code" href="classCVC3_1_1DecisionEngineDFS.html#afbb4011e6c9724af1fda70a63687f4d7" title="Find the next splitter.">DecisionEngineDFS::findSplitter</a>(<span class="keyword">const</span> <a class="code" href="classCVC3_1_1Expr.html" title="Data structure of expressions in CVC3.">Expr</a>& e) {
<a name="l00068"></a>00068 <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"splitters verbose"</span>, <span class="stringliteral">"findSplitter("</span>, e, <span class="stringliteral">") {"</span>);
<a name="l00069"></a>00069 <a class="code" href="classCVC3_1_1Expr.html" title="Data structure of expressions in CVC3.">Expr</a> splitter; <span class="comment">// Null by default</span>
<a name="l00070"></a>00070 <a class="code" href="group__DE.html#gab9a86f01371ea2ef051119f0e414727b" title="Visited cache for findSplitterRec traversal.">d_visited</a>.<a class="code" href="classCVC3_1_1ExprMap.html#a173c2cf4753189d956073d74c36c7c58">clear</a>();
<a name="l00071"></a>00071
<a name="l00072"></a>00072 <span class="keywordflow">if</span> (!e.<a class="code" href="group__ExprPkg.html#ga0265d1ca42fa59c95aaff3ca675b6504">isNull</a>()) {
<a name="l00073"></a>00073 splitter = <a class="code" href="group__DE.html#ga5974aad82f7244de1ce9a49969b2d57d">findSplitterRec</a>(e);
<a name="l00074"></a>00074 <span class="comment">// It's OK not to find a splitter, since e may contain only "bad"</span>
<a name="l00075"></a>00075 <span class="comment">// splitters, according to d_se->isGoodSplitter(e)</span>
<a name="l00076"></a>00076
<a name="l00077"></a>00077 <span class="comment">// DebugAssert(!splitter.isNull(),</span>
<a name="l00078"></a>00078 <span class="comment">// "findSplitter: can't find splitter in non-literal: "</span>
<a name="l00079"></a>00079 <span class="comment">// + e.toString());</span>
<a name="l00080"></a>00080 <a class="code" href="debug_8h.html#a600cb2d68efe7cc413cccbb5714c7016">IF_DEBUG</a>(<span class="keywordflow">if</span>(!splitter.<a class="code" href="group__ExprPkg.html#ga0265d1ca42fa59c95aaff3ca675b6504">isNull</a>())
<a name="l00081"></a>00081 debugger.counter(<span class="stringliteral">"splitters from decision engine"</span>)++;)
<a name="l00082"></a>00082 }
<a name="l00083"></a>00083 <a class="code" href="kinds_8h.html#aa10c9e8951b8ccf714a59ec321bdac5ba7fa27e82c6c4f69434225ed81e5d151e">TRACE</a>(<span class="stringliteral">"splitters verbose"</span>, <span class="stringliteral">"findSplitter => "</span>, splitter, <span class="stringliteral">" }"</span>);
<a name="l00084"></a>00084 <span class="keywordflow">return</span> splitter;
<a name="l00085"></a>00085 }
<a name="l00086"></a>00086
<a name="l00087"></a>00087
<a name="l00088"></a><a class="code" href="classCVC3_1_1DecisionEngineDFS.html#a3ebbe142c86aa4d303e5de0610309d1c">00088</a> <span class="keywordtype">void</span> <a class="code" href="classCVC3_1_1DecisionEngineDFS.html#a3ebbe142c86aa4d303e5de0610309d1c" title="Search should call this when it derives 'false'.">DecisionEngineDFS::goalSatisfied</a>()
<a name="l00089"></a>00089 {
<a name="l00090"></a>00090 }
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