1 /********************* */
2 /*! \file theory_quantifiers.cpp
4 ** Original author: Morgan Deters
5 ** Major contributors: Andrew Reynolds
6 ** Minor contributors (to current version): Dejan Jovanovic
7 ** This file is part of the CVC4 project.
8 ** Copyright (c) 2009-2014 New York University and The University of Iowa
9 ** See the file COPYING in the top-level source directory for licensing
10 ** information.\endverbatim
12 ** \brief Implementation of the theory of quantifiers
14 ** Implementation of the theory of quantifiers.
18 #include "theory/quantifiers/theory_quantifiers.h"
19 #include "theory/valuation.h"
20 #include "theory/quantifiers_engine.h"
21 #include "theory/quantifiers/instantiation_engine.h"
22 #include "theory/quantifiers/model_engine.h"
23 #include "expr/kind.h"
24 #include "util/cvc4_assert.h"
25 #include "theory/quantifiers/options.h"
26 #include "theory/quantifiers/term_database.h"
27 #include "theory/quantifiers/quantifiers_attributes.h"
31 using namespace CVC4::kind
;
32 using namespace CVC4::context
;
33 using namespace CVC4::theory
;
34 using namespace CVC4::theory::quantifiers
;
36 TheoryQuantifiers::TheoryQuantifiers(Context
* c
, context::UserContext
* u
, OutputChannel
& out
, Valuation valuation
, const LogicInfo
& logicInfo
) :
37 Theory(THEORY_QUANTIFIERS
, c
, u
, out
, valuation
, logicInfo
),
39 d_masterEqualityEngine(0)
41 d_numInstantiations
= 0;
43 out
.handleUserAttribute( "axiom", this );
44 out
.handleUserAttribute( "conjecture", this );
45 out
.handleUserAttribute( "inst-level", this );
46 out
.handleUserAttribute( "rr-priority", this );
49 TheoryQuantifiers::~TheoryQuantifiers() {
52 void TheoryQuantifiers::setMasterEqualityEngine(eq::EqualityEngine
* eq
) {
53 d_masterEqualityEngine
= eq
;
56 void TheoryQuantifiers::addSharedTerm(TNode t
) {
57 Debug("quantifiers-other") << "TheoryQuantifiers::addSharedTerm(): "
62 void TheoryQuantifiers::notifyEq(TNode lhs
, TNode rhs
) {
63 Debug("quantifiers-other") << "TheoryQuantifiers::notifyEq(): "
64 << lhs
<< " = " << rhs
<< endl
;
68 void TheoryQuantifiers::preRegisterTerm(TNode n
) {
69 Debug("quantifiers-prereg") << "TheoryQuantifiers::preRegisterTerm() " << n
<< endl
;
70 if( n
.getKind()==FORALL
&& !TermDb::hasInstConstAttr(n
) ){
71 getQuantifiersEngine()->registerQuantifier( n
);
76 void TheoryQuantifiers::presolve() {
77 Debug("quantifiers-presolve") << "TheoryQuantifiers::presolve()" << endl
;
80 Node
TheoryQuantifiers::getValue(TNode n
) {
81 //NodeManager* nodeManager = NodeManager::currentNM();
86 if( d_valuation
.hasSatValue( n
, value
) ){
87 return NodeManager::currentNM()->mkConst(value
);
89 return NodeManager::currentNM()->mkConst(false); //FIX_THIS?
93 Unhandled(n
.getKind());
97 void TheoryQuantifiers::collectModelInfo(TheoryModel
* m
, bool fullModel
) {
99 for(assertions_iterator i
= facts_begin(); i
!= facts_end(); ++i
) {
100 if((*i
).assertion
.getKind() == kind::NOT
) {
101 Debug("quantifiers::collectModelInfo") << "got quant FALSE: " << (*i
).assertion
[0] << endl
;
102 m
->assertPredicate((*i
).assertion
[0], false);
104 Debug("quantifiers::collectModelInfo") << "got quant TRUE : " << *i
<< endl
;
105 m
->assertPredicate(*i
, true);
111 void TheoryQuantifiers::check(Effort e
) {
112 if (done() && !fullEffort(e
)) {
116 CodeTimer
codeTimer(d_theoryTime
);
118 Trace("quantifiers-check") << "quantifiers::check(" << e
<< ")" << std::endl
;
120 Node assertion
= get();
121 Trace("quantifiers-assert") << "quantifiers::assert(): " << assertion
<< std::endl
;
122 switch(assertion
.getKind()) {
124 assertUniversal( assertion
);
128 switch( assertion
[0].getKind()) {
130 assertExistential( assertion
);
133 Unhandled(assertion
[0].getKind());
139 Unhandled(assertion
.getKind());
143 // call the quantifiers engine to check
144 getQuantifiersEngine()->check( e
);
147 void TheoryQuantifiers::propagate(Effort level
){
148 //CodeTimer codeTimer(d_theoryTime);
149 //getQuantifiersEngine()->propagate( level );
152 Node
TheoryQuantifiers::getNextDecisionRequest(){
153 return getQuantifiersEngine()->getNextDecisionRequest();
156 void TheoryQuantifiers::assertUniversal( Node n
){
157 Assert( n
.getKind()==FORALL
);
158 if( options::recurseCbqi() || !TermDb::hasInstConstAttr(n
) ){
159 getQuantifiersEngine()->assertQuantifier( n
, true );
163 void TheoryQuantifiers::assertExistential( Node n
){
164 Assert( n
.getKind()== NOT
&& n
[0].getKind()==FORALL
);
165 if( !options::cbqi() || options::recurseCbqi() || !TermDb::hasInstConstAttr(n
[0]) ){
166 getQuantifiersEngine()->assertQuantifier( n
[0], false );
170 bool TheoryQuantifiers::flipDecision(){
171 //Debug("quantifiers-flip") << "No instantiation given, flip decision, level = " << d_valuation.getDecisionLevel() << std::endl;
172 //for( int i=1; i<=(int)d_valuation.getDecisionLevel(); i++ ){
173 // Debug("quantifiers-flip") << " " << d_valuation.getDecision( i ) << std::endl;
175 //if( d_valuation.getDecisionLevel()>0 ){
176 // double r = double(rand())/double(RAND_MAX);
177 // unsigned decisionLevel = (unsigned)(r*d_valuation.getDecisionLevel());
178 // d_out->flipDecision( decisionLevel );
184 if( !d_out
->flipDecision() ){
190 bool TheoryQuantifiers::restart(){
191 static const int restartLimit
= 0;
192 if( d_numRestarts
==restartLimit
){
193 Debug("quantifiers-flip") << "No more restarts." << std::endl
;
197 Debug("quantifiers-flip") << "Do restart." << std::endl
;
202 void TheoryQuantifiers::setUserAttribute(const std::string
& attr
, Node n
, std::vector
<Node
> node_values
, std::string str_value
){
203 QuantifiersAttributes::setUserAttribute( attr
, n
, node_values
, str_value
);