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/********************* */
/*! \file theory_quantifiers.cpp
** \verbatim
** Top contributors (to current version):
** Andrew Reynolds, Morgan Deters, Tim King
** This file is part of the CVC4 project.
** Copyright (c) 2009-2020 by the authors listed in the file AUTHORS
** in the top-level source directory and their institutional affiliations.
** All rights reserved. See the file COPYING in the top-level source
** directory for licensing information.\endverbatim
**
** \brief Implementation of the theory of quantifiers
**
** Implementation of the theory of quantifiers.
**/
#include "theory/quantifiers/theory_quantifiers.h"
#include "base/check.h"
#include "expr/kind.h"
#include "expr/proof_node_manager.h"
#include "options/quantifiers_options.h"
#include "theory/quantifiers/ematching/instantiation_engine.h"
#include "theory/quantifiers/fmf/model_engine.h"
#include "theory/quantifiers/quantifiers_attributes.h"
#include "theory/quantifiers/quantifiers_rewriter.h"
#include "theory/quantifiers/term_database.h"
#include "theory/quantifiers/term_util.h"
#include "theory/quantifiers_engine.h"
#include "theory/valuation.h"
using namespace CVC4::kind;
using namespace CVC4::context;
namespace CVC4 {
namespace theory {
namespace quantifiers {
TheoryQuantifiers::TheoryQuantifiers(Context* c,
context::UserContext* u,
OutputChannel& out,
Valuation valuation,
const LogicInfo& logicInfo,
ProofNodeManager* pnm)
: Theory(THEORY_QUANTIFIERS, c, u, out, valuation, logicInfo, pnm),
d_qstate(c, u, valuation, logicInfo),
d_qim(*this, d_qstate, pnm),
d_qengine(d_qstate, d_qim, pnm)
{
out.handleUserAttribute( "fun-def", this );
out.handleUserAttribute("qid", this);
out.handleUserAttribute( "quant-inst-max-level", this );
out.handleUserAttribute( "quant-elim", this );
out.handleUserAttribute( "quant-elim-partial", this );
ProofChecker* pc = pnm != nullptr ? pnm->getChecker() : nullptr;
if (pc != nullptr)
{
// add the proof rules
d_qChecker.registerTo(pc);
}
// indicate we are using the quantifiers theory state object
d_theoryState = &d_qstate;
// use the inference manager as the official inference manager
d_inferManager = &d_qim;
// Set the pointer to the quantifiers engine, which this theory owns. This
// pointer will be retreived by TheoryEngine and set to all theories
// post-construction.
d_quantEngine = &d_qengine;
}
TheoryQuantifiers::~TheoryQuantifiers() {
}
TheoryRewriter* TheoryQuantifiers::getTheoryRewriter() { return &d_rewriter; }
void TheoryQuantifiers::finishInit()
{
// quantifiers are not evaluated in getModelValue
d_valuation.setUnevaluatedKind(EXISTS);
d_valuation.setUnevaluatedKind(FORALL);
// witness is used in several instantiation strategies
d_valuation.setUnevaluatedKind(WITNESS);
}
bool TheoryQuantifiers::needsEqualityEngine(EeSetupInfo& esi)
{
// use the master equality engine
esi.d_useMaster = true;
return true;
}
void TheoryQuantifiers::preRegisterTerm(TNode n)
{
if (n.getKind() != FORALL)
{
return;
}
Debug("quantifiers-prereg")
<< "TheoryQuantifiers::preRegisterTerm() " << n << std::endl;
// Preregister the quantified formula.
// This initializes the modules used for handling n in this user context.
getQuantifiersEngine()->preRegisterQuantifier(n);
Debug("quantifiers-prereg")
<< "TheoryQuantifiers::preRegisterTerm() done " << n << std::endl;
}
void TheoryQuantifiers::presolve() {
Debug("quantifiers-presolve") << "TheoryQuantifiers::presolve()" << std::endl;
if( getQuantifiersEngine() ){
getQuantifiersEngine()->presolve();
}
}
void TheoryQuantifiers::ppNotifyAssertions(
const std::vector<Node>& assertions) {
Trace("quantifiers-presolve")
<< "TheoryQuantifiers::ppNotifyAssertions" << std::endl;
if (getQuantifiersEngine()) {
getQuantifiersEngine()->ppNotifyAssertions(assertions);
}
}
bool TheoryQuantifiers::collectModelValues(TheoryModel* m,
const std::set<Node>& termSet)
{
for(assertions_iterator i = facts_begin(); i != facts_end(); ++i) {
if ((*i).d_assertion.getKind() == NOT)
{
Debug("quantifiers::collectModelInfo")
<< "got quant FALSE: " << (*i).d_assertion[0] << std::endl;
if (!m->assertPredicate((*i).d_assertion[0], false))
{
return false;
}
}
else
{
Debug("quantifiers::collectModelInfo")
<< "got quant TRUE : " << *i << std::endl;
if (!m->assertPredicate(*i, true))
{
return false;
}
}
}
return true;
}
void TheoryQuantifiers::postCheck(Effort level)
{
// call the quantifiers engine to check
getQuantifiersEngine()->check(level);
}
bool TheoryQuantifiers::preNotifyFact(
TNode atom, bool polarity, TNode fact, bool isPrereg, bool isInternal)
{
Kind k = atom.getKind();
if (k == FORALL)
{
getQuantifiersEngine()->assertQuantifier(atom, polarity);
}
else
{
Unhandled() << "Unexpected fact " << fact;
}
// don't use equality engine, always return true
return true;
}
void TheoryQuantifiers::setUserAttribute(const std::string& attr, Node n, std::vector<Node> node_values, std::string str_value){
QuantAttributes::setUserAttribute( attr, n, node_values, str_value );
}
} // namespace quantifiers
} // namespace theory
} // namespace CVC4
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