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<a href="sat__proof_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 sat_proof.h</span>
<a name="l00004"></a>00004 <span class="comment"> *\brief Sat solver proof representation</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 <span class="preprocessor">#ifndef _cvc3__sat__proof_h_</span>
<a name="l00022"></a>00022 <span class="preprocessor"></span><span class="preprocessor">#define _cvc3__sat__proof_h_</span>
<a name="l00023"></a>00023 <span class="preprocessor"></span>
<a name="l00024"></a>00024 <span class="preprocessor">#include "<a class="code" href="theorem_8h.html">theorem.h</a>"</span>
<a name="l00025"></a>00025 <span class="preprocessor">#include <list></span>
<a name="l00026"></a>00026
<a name="l00027"></a>00027 <span class="keyword">namespace </span>SAT {
<a name="l00028"></a>00028
<a name="l00029"></a>00029 <span class="comment">// a node in a resolution tree, either:</span>
<a name="l00030"></a>00030 <span class="comment">// - a leaf</span>
<a name="l00031"></a>00031 <span class="comment">// then d_clause is a clause added to the sat solver by the cvc controller;</span>
<a name="l00032"></a>00032 <span class="comment">// the other values are empty</span>
<a name="l00033"></a>00033 <span class="comment">// - a binary node</span>
<a name="l00034"></a>00034 <span class="comment">// then the node represents the clause which can be derived by resolution</span>
<a name="l00035"></a>00035 <span class="comment">// between its left and right parent on d_lit,</span>
<a name="l00036"></a>00036 <span class="comment">// where d_left contains d_lit and d_right contains the negation of d_lit</span>
<a name="l00037"></a><a class="code" href="classSAT_1_1SatProofNode.html">00037</a> <span class="keyword">class </span><a class="code" href="classSAT_1_1SatProofNode.html">SatProofNode</a> {
<a name="l00038"></a>00038 <span class="keyword">private</span>:
<a name="l00039"></a><a class="code" href="classSAT_1_1SatProofNode.html#a2e9be828d0f5bcb75ea37f61067433d9">00039</a> <a class="code" href="classCVC3_1_1Theorem.html">CVC3::Theorem</a> <a class="code" href="classSAT_1_1SatProofNode.html#a2e9be828d0f5bcb75ea37f61067433d9">d_theorem</a>;
<a name="l00040"></a><a class="code" href="classSAT_1_1SatProofNode.html#a937d907130c8189318291712f6f16756">00040</a> <a class="code" href="classSAT_1_1SatProofNode.html">SatProofNode</a>* <a class="code" href="classSAT_1_1SatProofNode.html#a937d907130c8189318291712f6f16756">d_left</a>;
<a name="l00041"></a><a class="code" href="classSAT_1_1SatProofNode.html#a7931b60e528961210273ac367327c8cd">00041</a> <a class="code" href="classSAT_1_1SatProofNode.html">SatProofNode</a>* <a class="code" href="classSAT_1_1SatProofNode.html#a7931b60e528961210273ac367327c8cd">d_right</a>;
<a name="l00042"></a><a class="code" href="classSAT_1_1SatProofNode.html#aedc434d5b9b530c35634b196f7b1544a">00042</a> <a class="code" href="classSAT_1_1Lit.html">SAT::Lit</a> <a class="code" href="classSAT_1_1SatProofNode.html#aedc434d5b9b530c35634b196f7b1544a">d_lit</a>;
<a name="l00043"></a><a class="code" href="classSAT_1_1SatProofNode.html#aabb35b7153c10db6dc9562667505a1fa">00043</a> <a class="code" href="classCVC3_1_1Proof.html">CVC3::Proof</a> <a class="code" href="classSAT_1_1SatProofNode.html#aabb35b7153c10db6dc9562667505a1fa">d_proof</a>; <span class="comment">// by yeting, to store the proof. We do not need to set a null value to proof bcause this is done by the constructor of proof</span>
<a name="l00044"></a>00044 <span class="keyword">public</span>:
<a name="l00045"></a><a class="code" href="classSAT_1_1SatProofNode.html#acaacdf7888165eb2ae633ad7b74f66fa">00045</a> <a class="code" href="classSAT_1_1SatProofNode.html#acaacdf7888165eb2ae633ad7b74f66fa">SatProofNode</a>(<a class="code" href="classCVC3_1_1Theorem.html">CVC3::Theorem</a> theorem) :
<a name="l00046"></a>00046 <a class="code" href="classSAT_1_1SatProofNode.html#a2e9be828d0f5bcb75ea37f61067433d9">d_theorem</a>(theorem), <a class="code" href="classSAT_1_1SatProofNode.html#a937d907130c8189318291712f6f16756">d_left</a>(NULL), <a class="code" href="classSAT_1_1SatProofNode.html#a7931b60e528961210273ac367327c8cd">d_right</a>(NULL){
<a name="l00047"></a>00047 <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(!theorem.<a class="code" href="classCVC3_1_1Theorem.html#afc6fdb0507eb3669e28d9be5ed0bd333">isNull</a>(), <span class="stringliteral">"SatProofNode: constructor"</span>);
<a name="l00048"></a>00048 }
<a name="l00049"></a>00049 <span class="comment">//we can modify the constructor of SatProofNode(clause) to store the clauses</span>
<a name="l00050"></a>00050 <span class="comment">//add a method to return all clauses here</span>
<a name="l00051"></a>00051
<a name="l00052"></a><a class="code" href="classSAT_1_1SatProofNode.html#a8d6a26e4f59b4c065f422b8afcb8c5a4">00052</a> <a class="code" href="classSAT_1_1SatProofNode.html#acaacdf7888165eb2ae633ad7b74f66fa">SatProofNode</a>(<a class="code" href="classSAT_1_1SatProofNode.html">SatProofNode</a>* <a class="code" href="namespaceMiniSat.html#ad93cb56673487974071ed3b75bf4ea83">left</a>, <a class="code" href="classSAT_1_1SatProofNode.html">SatProofNode</a>* <a class="code" href="namespaceMiniSat.html#a82558b7a36c52f5d3211d5d14bed99d4">right</a>, <a class="code" href="classSAT_1_1Lit.html">SAT::Lit</a> lit) :
<a name="l00053"></a>00053 <a class="code" href="classSAT_1_1SatProofNode.html#a937d907130c8189318291712f6f16756">d_left</a>(left), <a class="code" href="classSAT_1_1SatProofNode.html#a7931b60e528961210273ac367327c8cd">d_right</a>(right), <a class="code" href="classSAT_1_1SatProofNode.html#aedc434d5b9b530c35634b196f7b1544a">d_lit</a>(lit) {
<a name="l00054"></a>00054 <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(<a class="code" href="classSAT_1_1SatProofNode.html#a937d907130c8189318291712f6f16756">d_left</a> != NULL, <span class="stringliteral">"SatProofNode: constructor"</span>);
<a name="l00055"></a>00055 <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(<a class="code" href="classSAT_1_1SatProofNode.html#a7931b60e528961210273ac367327c8cd">d_right</a> != NULL, <span class="stringliteral">"SatProofNode: constructor"</span>);
<a name="l00056"></a>00056 }
<a name="l00057"></a>00057
<a name="l00058"></a><a class="code" href="classSAT_1_1SatProofNode.html#a3ebf0d7ca635f0028e20b06fc5c0603a">00058</a> <span class="keywordtype">bool</span> <a class="code" href="classSAT_1_1SatProofNode.html#a3ebf0d7ca635f0028e20b06fc5c0603a">isLeaf</a>() { <span class="keywordflow">return</span> !<a class="code" href="classSAT_1_1SatProofNode.html#a2e9be828d0f5bcb75ea37f61067433d9">d_theorem</a>.<a class="code" href="classCVC3_1_1Theorem.html#afc6fdb0507eb3669e28d9be5ed0bd333">isNull</a>(); }
<a name="l00059"></a><a class="code" href="classSAT_1_1SatProofNode.html#a7a26868e17f2fe9fef1d3b8f934de4a5">00059</a> <a class="code" href="classCVC3_1_1Theorem.html">CVC3::Theorem</a> <a class="code" href="classSAT_1_1SatProofNode.html#a7a26868e17f2fe9fef1d3b8f934de4a5">getLeaf</a>() { <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(<a class="code" href="classSAT_1_1SatProofNode.html#a3ebf0d7ca635f0028e20b06fc5c0603a">isLeaf</a>(), <span class="stringliteral">"SatProofNode: getLeaf"</span>); <span class="keywordflow">return</span> <a class="code" href="classSAT_1_1SatProofNode.html#a2e9be828d0f5bcb75ea37f61067433d9">d_theorem</a>; }
<a name="l00060"></a><a class="code" href="classSAT_1_1SatProofNode.html#a5e8c4112ac870c8d843e54a393bea892">00060</a> <a class="code" href="classSAT_1_1SatProofNode.html">SatProofNode</a>* <a class="code" href="classSAT_1_1SatProofNode.html#a5e8c4112ac870c8d843e54a393bea892">getLeftParent</a>() { <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(!<a class="code" href="classSAT_1_1SatProofNode.html#a3ebf0d7ca635f0028e20b06fc5c0603a">isLeaf</a>(), <span class="stringliteral">"SatProofNode: getLeftParent"</span>); <span class="keywordflow">return</span> <a class="code" href="classSAT_1_1SatProofNode.html#a937d907130c8189318291712f6f16756">d_left</a>; }
<a name="l00061"></a><a class="code" href="classSAT_1_1SatProofNode.html#a611593dffb824df842f88492bf160e80">00061</a> <a class="code" href="classSAT_1_1SatProofNode.html">SatProofNode</a>* <a class="code" href="classSAT_1_1SatProofNode.html#a611593dffb824df842f88492bf160e80">getRightParent</a>() { <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(!<a class="code" href="classSAT_1_1SatProofNode.html#a3ebf0d7ca635f0028e20b06fc5c0603a">isLeaf</a>(), <span class="stringliteral">"SatProofNode: getRightParent"</span>); <span class="keywordflow">return</span> <a class="code" href="classSAT_1_1SatProofNode.html#a7931b60e528961210273ac367327c8cd">d_right</a>; }
<a name="l00062"></a><a class="code" href="classSAT_1_1SatProofNode.html#a08af371d991d7e9b9e3a1a32b2ab0ec4">00062</a> <a class="code" href="classSAT_1_1Lit.html">SAT::Lit</a> <a class="code" href="classSAT_1_1SatProofNode.html#a08af371d991d7e9b9e3a1a32b2ab0ec4">getLit</a>() { <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(!<a class="code" href="classSAT_1_1SatProofNode.html#a3ebf0d7ca635f0028e20b06fc5c0603a">isLeaf</a>(), <span class="stringliteral">"SatProofNode: getLit"</span>); <span class="keywordflow">return</span> <a class="code" href="classSAT_1_1SatProofNode.html#aedc434d5b9b530c35634b196f7b1544a">d_lit</a>; }
<a name="l00063"></a><a class="code" href="classSAT_1_1SatProofNode.html#a174ea8ebc16d85209afefd5048579991">00063</a> <span class="keywordtype">bool</span> <a class="code" href="classSAT_1_1SatProofNode.html#a174ea8ebc16d85209afefd5048579991">hasNodeProof</a>() {<span class="keywordflow">return</span> !<a class="code" href="classSAT_1_1SatProofNode.html#aabb35b7153c10db6dc9562667505a1fa">d_proof</a>.<a class="code" href="classCVC3_1_1Proof.html#a24acb4848153feb8b0c88eb825b92046">isNull</a>();};
<a name="l00064"></a><a class="code" href="classSAT_1_1SatProofNode.html#a728ac3f95a5bd503ed952d6dc9052aff">00064</a> <a class="code" href="classCVC3_1_1Proof.html">CVC3::Proof</a> <a class="code" href="classSAT_1_1SatProofNode.html#a728ac3f95a5bd503ed952d6dc9052aff">getNodeProof</a>() {<a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(!<a class="code" href="classSAT_1_1SatProofNode.html#aabb35b7153c10db6dc9562667505a1fa">d_proof</a>.<a class="code" href="classCVC3_1_1Proof.html#a24acb4848153feb8b0c88eb825b92046">isNull</a>(), <span class="stringliteral">"SatProofNode: nodeProof get null"</span>); <span class="keywordflow">return</span> <a class="code" href="classSAT_1_1SatProofNode.html#aabb35b7153c10db6dc9562667505a1fa">d_proof</a>;}
<a name="l00065"></a><a class="code" href="classSAT_1_1SatProofNode.html#ae1bb4eb633b82329667ade6192f0d9cb">00065</a> <span class="keywordtype">void</span> <a class="code" href="classSAT_1_1SatProofNode.html#ae1bb4eb633b82329667ade6192f0d9cb">setNodeProof</a>(<a class="code" href="classCVC3_1_1Proof.html">CVC3::Proof</a> pf) { <a class="code" href="classSAT_1_1SatProofNode.html#aabb35b7153c10db6dc9562667505a1fa">d_proof</a>=pf;}
<a name="l00066"></a>00066 };
<a name="l00067"></a>00067
<a name="l00068"></a>00068
<a name="l00069"></a>00069 <span class="comment">// a proof of the clause d_root</span>
<a name="l00070"></a><a class="code" href="classSAT_1_1SatProof.html">00070</a> <span class="keyword">class </span><a class="code" href="classSAT_1_1SatProof.html">SatProof</a> {
<a name="l00071"></a>00071 <span class="keyword">private</span>:
<a name="l00072"></a><a class="code" href="classSAT_1_1SatProof.html#a46cd2c556578583b7a0adf7b05bd7660">00072</a> <a class="code" href="classSAT_1_1SatProofNode.html">SatProofNode</a>* <a class="code" href="classSAT_1_1SatProof.html#a46cd2c556578583b7a0adf7b05bd7660">d_root</a>;
<a name="l00073"></a><a class="code" href="classSAT_1_1SatProof.html#ae4d5eff3f40c061bac18dff5ae128e9a">00073</a> std::list<SatProofNode*> <a class="code" href="classSAT_1_1SatProof.html#ae4d5eff3f40c061bac18dff5ae128e9a">d_nodes</a>;
<a name="l00074"></a>00074 <span class="keyword">public</span>:
<a name="l00075"></a><a class="code" href="classSAT_1_1SatProof.html#a385e94ed24299be3d73bf3f62248bc1b">00075</a> <a class="code" href="classSAT_1_1SatProof.html#a385e94ed24299be3d73bf3f62248bc1b">SatProof</a>() : <a class="code" href="classSAT_1_1SatProof.html#a46cd2c556578583b7a0adf7b05bd7660">d_root</a>(NULL) { };
<a name="l00076"></a>00076
<a name="l00077"></a><a class="code" href="classSAT_1_1SatProof.html#ad9776c5c921afe42387faee309e22fdb">00077</a> <a class="code" href="classSAT_1_1SatProof.html#ad9776c5c921afe42387faee309e22fdb">~SatProof</a>() {
<a name="l00078"></a>00078 <span class="keywordflow">for</span> (std::list<SatProofNode*>::iterator i = <a class="code" href="classSAT_1_1SatProof.html#ae4d5eff3f40c061bac18dff5ae128e9a">d_nodes</a>.begin(); i != <a class="code" href="classSAT_1_1SatProof.html#ae4d5eff3f40c061bac18dff5ae128e9a">d_nodes</a>.end(); ++i) {
<a name="l00079"></a>00079 <span class="keyword">delete</span>(*i);
<a name="l00080"></a>00080 }
<a name="l00081"></a>00081 }
<a name="l00082"></a>00082
<a name="l00083"></a>00083
<a name="l00084"></a>00084 <span class="comment">// build proof</span>
<a name="l00085"></a>00085
<a name="l00086"></a>00086 <span class="comment">// ownership of created node remains with SatProof</span>
<a name="l00087"></a><a class="code" href="classSAT_1_1SatProof.html#a36554406554d1f6ea793c98b104bd071">00087</a> <a class="code" href="classSAT_1_1SatProofNode.html">SatProofNode</a>* <a class="code" href="classSAT_1_1SatProof.html#a36554406554d1f6ea793c98b104bd071">registerLeaf</a>(<a class="code" href="classCVC3_1_1Theorem.html">CVC3::Theorem</a> theorem) {
<a name="l00088"></a>00088 <a class="code" href="classSAT_1_1SatProofNode.html">SatProofNode</a>* node = <span class="keyword">new</span> <a class="code" href="classSAT_1_1SatProofNode.html">SatProofNode</a>(theorem);
<a name="l00089"></a>00089 <a class="code" href="classSAT_1_1SatProof.html#ae4d5eff3f40c061bac18dff5ae128e9a">d_nodes</a>.push_back(node);
<a name="l00090"></a>00090 <span class="keywordflow">return</span> node;
<a name="l00091"></a>00091 }
<a name="l00092"></a>00092
<a name="l00093"></a>00093 <span class="comment">// ownership of created node remains with SatProof</span>
<a name="l00094"></a><a class="code" href="classSAT_1_1SatProof.html#a95ddb594997f8a50a62b277f1db6c1aa">00094</a> <a class="code" href="classSAT_1_1SatProofNode.html">SatProofNode</a>* <a class="code" href="classSAT_1_1SatProof.html#a95ddb594997f8a50a62b277f1db6c1aa">registerNode</a>(<a class="code" href="classSAT_1_1SatProofNode.html">SatProofNode</a>* <a class="code" href="namespaceMiniSat.html#ad93cb56673487974071ed3b75bf4ea83">left</a>, <a class="code" href="classSAT_1_1SatProofNode.html">SatProofNode</a>* <a class="code" href="namespaceMiniSat.html#a82558b7a36c52f5d3211d5d14bed99d4">right</a>, <a class="code" href="classSAT_1_1Lit.html">SAT::Lit</a> l) {
<a name="l00095"></a>00095 <a class="code" href="classSAT_1_1SatProofNode.html">SatProofNode</a>* node = <span class="keyword">new</span> <a class="code" href="classSAT_1_1SatProofNode.html">SatProofNode</a>(left, right, l);
<a name="l00096"></a>00096 <a class="code" href="classSAT_1_1SatProof.html#ae4d5eff3f40c061bac18dff5ae128e9a">d_nodes</a>.push_back(node);
<a name="l00097"></a>00097 <span class="keywordflow">return</span> node;
<a name="l00098"></a>00098 }
<a name="l00099"></a>00099
<a name="l00100"></a><a class="code" href="classSAT_1_1SatProof.html#a0eba2c0baf1019cef7b96b5af3e2aa5c">00100</a> <span class="keywordtype">void</span> <a class="code" href="classSAT_1_1SatProof.html#a0eba2c0baf1019cef7b96b5af3e2aa5c">setRoot</a>(<a class="code" href="classSAT_1_1SatProofNode.html">SatProofNode</a>* root) {
<a name="l00101"></a>00101 <a class="code" href="classSAT_1_1SatProof.html#a46cd2c556578583b7a0adf7b05bd7660">d_root</a> = root;
<a name="l00102"></a>00102 }
<a name="l00103"></a>00103
<a name="l00104"></a>00104
<a name="l00105"></a>00105 <span class="comment">// access proof</span>
<a name="l00106"></a>00106
<a name="l00107"></a>00107 <span class="comment">// ownership of all nodes remains with SatProof</span>
<a name="l00108"></a><a class="code" href="classSAT_1_1SatProof.html#af60143aa39c6a582d71c9d61bb816bfb">00108</a> <a class="code" href="classSAT_1_1SatProofNode.html">SatProofNode</a>* <a class="code" href="classSAT_1_1SatProof.html#af60143aa39c6a582d71c9d61bb816bfb">getRoot</a>() {
<a name="l00109"></a>00109 <a class="code" href="debug_8h.html#a40dac3bdb2166ffc852ee8b1489d2b56">DebugAssert</a>(<a class="code" href="classSAT_1_1SatProof.html#a46cd2c556578583b7a0adf7b05bd7660">d_root</a> != NULL, <span class="stringliteral">"null root found in getRoot"</span>);
<a name="l00110"></a>00110 <span class="keywordflow">return</span> <a class="code" href="classSAT_1_1SatProof.html#a46cd2c556578583b7a0adf7b05bd7660">d_root</a>;
<a name="l00111"></a>00111 }
<a name="l00112"></a>00112 };
<a name="l00113"></a>00113
<a name="l00114"></a>00114 }
<a name="l00115"></a>00115
<a name="l00116"></a>00116 <span class="preprocessor">#endif</span>
</pre></div></div>
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