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<div class="title">decision_engine.h</div> </div>
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<a href="decision__engine_8h.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.h</span>
<a name="l00004"></a>00004 <span class="comment"> * </span>
<a name="l00005"></a>00005 <span class="comment"> * Author: Clark Barrett</span>
<a name="l00006"></a>00006 <span class="comment"> * </span>
<a name="l00007"></a>00007 <span class="comment"> * Created: Fri Jul 11 13:04:25 2003</span>
<a name="l00008"></a>00008 <span class="comment"> *</span>
<a name="l00009"></a>00009 <span class="comment"> * <hr></span>
<a name="l00010"></a>00010 <span class="comment"> *</span>
<a name="l00011"></a>00011 <span class="comment"> * License to use, copy, modify, sell and/or distribute this software</span>
<a name="l00012"></a>00012 <span class="comment"> * and its documentation for any purpose is hereby granted without</span>
<a name="l00013"></a>00013 <span class="comment"> * royalty, subject to the terms and conditions defined in the \ref</span>
<a name="l00014"></a>00014 <span class="comment"> * LICENSE file provided with this distribution.</span>
<a name="l00015"></a>00015 <span class="comment"> * </span>
<a name="l00016"></a>00016 <span class="comment"> * <hr></span>
<a name="l00017"></a>00017 <span class="comment"> * </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 <span class="preprocessor">#ifndef _cvc3__search__decision_engine_h_</span>
<a name="l00022"></a>00022 <span class="preprocessor"></span><span class="preprocessor">#define _cvc3__search__decision_engine_h_</span>
<a name="l00023"></a>00023 <span class="preprocessor"></span>
<a name="l00024"></a>00024 <span class="preprocessor">#include "<a class="code" href="statistics_8h.html" title="Description: Counters and flags for collecting run-time statistics.">statistics.h</a>"</span>
<a name="l00025"></a>00025 <span class="preprocessor">#include "<a class="code" href="search__fast_8h.html">search_fast.h</a>"</span>
<a name="l00026"></a>00026
<a name="l00027"></a>00027 <span class="keyword">namespace </span>CVC3 {
<a name="l00028"></a>00028
<a name="l00029"></a><a class="code" href="classCVC3_1_1DecisionEngine.html">00029</a> <span class="keyword">class </span><a class="code" href="classCVC3_1_1DecisionEngine.html">DecisionEngine</a> {
<a name="l00030"></a>00030
<a name="l00031"></a>00031 <span class="comment">/***************************************************************************/</span><span class="comment"></span>
<a name="l00032"></a>00032 <span class="comment"> /*!</span>
<a name="l00033"></a>00033 <span class="comment"> *\defgroup DE Decision Engine</span>
<a name="l00034"></a>00034 <span class="comment"> *\brief Decision Engine, used by Search Engine</span>
<a name="l00035"></a>00035 <span class="comment"> *\ingroup SE</span>
<a name="l00036"></a>00036 <span class="comment"> *@{</span>
<a name="l00037"></a>00037 <span class="comment"> */</span>
<a name="l00038"></a>00038 <span class="comment">/***************************************************************************/</span>
<a name="l00039"></a>00039
<a name="l00040"></a>00040 <span class="keyword">protected</span>:
<a name="l00041"></a><a class="code" href="group__DE.html#gaea6842e7db1a4cb203d8a6da726b52ed">00041</a> <a class="code" href="classCVC3_1_1TheoryCore.html" title="This theory handles the built-in logical connectives plus equality. It also handles the registration ...">TheoryCore</a>* <a class="code" href="group__DE.html#gaea6842e7db1a4cb203d8a6da726b52ed" title="Pointer to core theory.">d_core</a>; <span class="comment">//!< Pointer to core theory</span>
<a name="l00042"></a><a class="code" href="group__DE.html#ga11d61d4a7d9938dd4c72ffe564dc9cb7">00042</a> <span class="comment"></span> <a class="code" href="classCVC3_1_1SearchImplBase.html" title="API to to a generic proof search engine (a.k.a. SAT solver)">SearchImplBase</a>* <a class="code" href="group__DE.html#ga11d61d4a7d9938dd4c72ffe564dc9cb7" title="Pointer to search engine.">d_se</a>; <span class="comment">//!< Pointer to search engine</span>
<a name="l00043"></a>00043 <span class="comment"></span><span class="comment"></span>
<a name="l00044"></a>00044 <span class="comment"> //! List of currently active splitters</span>
<a name="l00045"></a><a class="code" href="group__DE.html#gaf662ad88359f7ce623ffe35ebc6d74ef">00045</a> <span class="comment"></span> <a class="code" href="classCVC3_1_1CDList.html">CDList<Expr></a> <a class="code" href="group__DE.html#gaf662ad88359f7ce623ffe35ebc6d74ef" title="List of currently active splitters.">d_splitters</a>;
<a name="l00046"></a>00046 <span class="comment"></span>
<a name="l00047"></a>00047 <span class="comment"> //! Total number of splitters</span>
<a name="l00048"></a><a class="code" href="group__DE.html#gae9092ccb020b756b56556eb57a7af5ab">00048</a> <span class="comment"></span> <a class="code" href="classCVC3_1_1StatCounter.html">StatCounter</a> <a class="code" href="group__DE.html#gae9092ccb020b756b56556eb57a7af5ab" title="Total number of splitters.">d_splitterCount</a>;
<a name="l00049"></a>00049
<a name="l00050"></a><a class="code" href="group__DE.html#ga922651f82bf5dec8e9f6d7211507a6fd">00050</a> <a class="code" href="classCVC3_1_1ExprMap.html">ExprMap<Expr></a> <a class="code" href="group__DE.html#ga922651f82bf5dec8e9f6d7211507a6fd">d_bestByExpr</a>;
<a name="l00051"></a>00051 <span class="comment"></span>
<a name="l00052"></a>00052 <span class="comment"> //! Visited cache for findSplitterRec traversal. </span>
<a name="l00053"></a>00053 <span class="comment"></span><span class="comment"> /*! Must be emptied in every findSplitter() call. */</span>
<a name="l00054"></a><a class="code" href="group__DE.html#gab9a86f01371ea2ef051119f0e414727b">00054</a> <a class="code" href="classCVC3_1_1ExprMap.html">ExprMap<Expr></a> <a class="code" href="group__DE.html#gab9a86f01371ea2ef051119f0e414727b" title="Visited cache for findSplitterRec traversal.">d_visited</a>;
<a name="l00055"></a>00055
<a name="l00056"></a>00056 <a class="code" href="classCVC3_1_1Expr.html" title="Data structure of expressions in CVC3.">Expr</a> <a class="code" href="group__DE.html#ga5974aad82f7244de1ce9a49969b2d57d">findSplitterRec</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="l00057"></a>00057 <span class="keyword">virtual</span> <span class="keywordtype">bool</span> <a class="code" href="group__DE.html#gaaa431eec1b04f02c8a7573d34616158b">isBetter</a>(<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) = 0;
<a name="l00058"></a>00058
<a name="l00059"></a>00059 <span class="keyword">public</span>:
<a name="l00060"></a>00060 <a class="code" href="group__DE.html#gae0864ba9d167d33e9d1c1ed4416a76fd">DecisionEngine</a>(<a class="code" href="classCVC3_1_1TheoryCore.html" title="This theory handles the built-in logical connectives plus equality. It also handles the registration ...">TheoryCore</a>* core, <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="l00061"></a><a class="code" href="group__DE.html#ga55c5dee7b559b90e9d0c3fd8aa7c70b2">00061</a> <span class="keyword">virtual</span> <a class="code" href="group__DE.html#ga55c5dee7b559b90e9d0c3fd8aa7c70b2">~DecisionEngine</a>() { }
<a name="l00062"></a>00062 <span class="comment"></span>
<a name="l00063"></a>00063 <span class="comment"> /*! @brief Finds a splitter inside a non const expression.</span>
<a name="l00064"></a>00064 <span class="comment"> The expression passed in must not be a boolean constant,</span>
<a name="l00065"></a>00065 <span class="comment"> otherwise a DebugAssert will occur. \return Null Expr if passed</span>
<a name="l00066"></a>00066 <span class="comment"> in a Null Expr. */</span>
<a name="l00067"></a>00067 <span class="keyword">virtual</span> <a class="code" href="classCVC3_1_1Expr.html" title="Data structure of expressions in CVC3.">Expr</a> <a class="code" href="group__DE.html#ga6f191a7f4edb645e8df7c1f005a50bf8" title="Finds a splitter inside a non const expression. The expression passed in must not be a boolean consta...">findSplitter</a>(<span class="keyword">const</span> <a class="code" href="classCVC3_1_1Expr.html" title="Data structure of expressions in CVC3.">Expr</a>& e) = 0;
<a name="l00068"></a>00068 <span class="comment"></span>
<a name="l00069"></a>00069 <span class="comment"> //! Push context and record the splitter</span>
<a name="l00070"></a>00070 <span class="comment"></span> <span class="keywordtype">void</span> <a class="code" href="group__DE.html#ga03a83031c2361cce4e8ce952842973be" title="Push context and record the splitter.">pushDecision</a>(<a class="code" href="classCVC3_1_1Expr.html" title="Data structure of expressions in CVC3.">Expr</a> splitter, <span class="keywordtype">bool</span> whichCase=<span class="keyword">true</span>);<span class="comment"></span>
<a name="l00071"></a>00071 <span class="comment"> //! Pop last decision (and context)</span>
<a name="l00072"></a>00072 <span class="comment"></span> <span class="keywordtype">void</span> <a class="code" href="group__DE.html#ga96c0e5c796d102da129381dd12595e8a" title="Pop last decision (and context)">popDecision</a>();<span class="comment"></span>
<a name="l00073"></a>00073 <span class="comment"> //! Pop to given scope</span>
<a name="l00074"></a>00074 <span class="comment"></span> <span class="keywordtype">void</span> <a class="code" href="group__DE.html#ga90d2e881c4cc004754708ee579682d85" title="Pop to given scope.">popTo</a>(<span class="keywordtype">int</span> dl);
<a name="l00075"></a>00075 <span class="comment"></span>
<a name="l00076"></a>00076 <span class="comment"> //! Return the last known splitter.</span>
<a name="l00077"></a>00077 <span class="comment"></span> <a class="code" href="classCVC3_1_1Expr.html" title="Data structure of expressions in CVC3.">Expr</a> <a class="code" href="group__DE.html#ga5b67011c3ea03780faf2071d5085a544" title="Return the last known splitter.">lastSplitter</a>();
<a name="l00078"></a>00078 <span class="comment"></span>
<a name="l00079"></a>00079 <span class="comment"> //! Search should call this when it derives 'false'</span>
<a name="l00080"></a>00080 <span class="comment"></span> <span class="keyword">virtual</span> <span class="keywordtype">void</span> <a class="code" href="group__DE.html#ga7910d09d94bd27c02f53a3f7e0a9af00" title="Search should call this when it derives 'false'.">goalSatisfied</a>() = 0;
<a name="l00081"></a>00081 <span class="comment"></span>
<a name="l00082"></a>00082 <span class="comment"> /*@}*/</span> <span class="comment">// End of DE group</span>
<a name="l00083"></a>00083
<a name="l00084"></a>00084 };
<a name="l00085"></a>00085
<a name="l00086"></a>00086 }
<a name="l00087"></a>00087
<a name="l00088"></a>00088 <span class="preprocessor">#endif</span>
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