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/********************* */
/*! \file inst_strategy_cbqi.h
** \verbatim
** Top contributors (to current version):
** Andrew Reynolds, Morgan Deters, Tim King
** This file is part of the CVC4 project.
** Copyright (c) 2009-2016 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 counterexample-guided quantifier instantiation
**/
#include "cvc4_private.h"
#ifndef __CVC4__INST_STRATEGY_CBQI_H
#define __CVC4__INST_STRATEGY_CBQI_H
#include "theory/arith/arithvar.h"
#include "theory/quantifiers/ceg_instantiator.h"
#include "theory/quantifiers/instantiation_engine.h"
#include "util/statistics_registry.h"
namespace CVC4 {
namespace theory {
namespace arith {
class TheoryArith;
}
namespace quantifiers {
class InstStrategyCbqi : public QuantifiersModule {
typedef context::CDHashSet<Node, NodeHashFunction> NodeSet;
protected:
bool d_cbqi_set_quant_inactive;
bool d_incomplete_check;
/** whether we have added cbqi lemma */
NodeSet d_added_cbqi_lemma;
/** whether we have instantiated quantified formulas */
//NodeSet d_added_inst;
/** whether to do cbqi for this quantified formula */
std::map< Node, bool > d_do_cbqi;
/** register ce lemma */
virtual void registerCounterexampleLemma( Node q, Node lem );
/** has added cbqi lemma */
bool hasAddedCbqiLemma( Node q ) { return d_added_cbqi_lemma.find( q )!=d_added_cbqi_lemma.end(); }
/** helper functions */
bool hasNonCbqiVariable( Node q );
bool hasNonCbqiOperator( Node n, std::map< Node, bool >& visited );
/** process functions */
virtual void processResetInstantiationRound( Theory::Effort effort ) = 0;
virtual void process( Node q, Theory::Effort effort, int e ) = 0;
public:
InstStrategyCbqi( QuantifiersEngine * qe );
~InstStrategyCbqi() throw();
/** whether to do CBQI for quantifier q */
bool doCbqi( Node q );
/** process functions */
bool needsCheck( Theory::Effort e );
unsigned needsModel( Theory::Effort e );
void reset_round( Theory::Effort e );
void check( Theory::Effort e, unsigned quant_e );
bool checkComplete();
void preRegisterQuantifier( Node q );
void registerQuantifier( Node q );
/** get next decision request */
Node getNextDecisionRequest();
};
class InstStrategySimplex : public InstStrategyCbqi {
protected:
/** reference to theory arithmetic */
arith::TheoryArith* d_th;
/** quantifiers we should process */
std::map< Node, bool > d_quantActive;
/** delta */
std::map< TypeNode, Node > d_deltas;
/** for each quantifier, simplex rows */
std::map< Node, std::vector< arith::ArithVar > > d_instRows;
/** tableaux */
std::map< Node, std::map< arith::ArithVar, Node > > d_tableaux_term;
std::map< Node, std::map< arith::ArithVar, std::map< Node, Node > > > d_tableaux_ce_term;
std::map< Node, std::map< arith::ArithVar, std::map< Node, Node > > > d_tableaux;
/** ce tableaux */
std::map< Node, std::map< arith::ArithVar, std::map< Node, Node > > > d_ceTableaux;
/** get value */
//Node getTableauxValue( Node n, bool minus_delta = false );
Node getTableauxValue( arith::ArithVar v, bool minus_delta = false );
/** do instantiation */
bool doInstantiation( Node f, Node ic, Node term, arith::ArithVar x, InstMatch& m, Node var );
bool doInstantiation2( Node f, Node ic, Node term, arith::ArithVar x, InstMatch& m, Node var, bool minus_delta = false );
/** add term to row */
void addTermToRow( Node ic, arith::ArithVar x, Node n, NodeBuilder<>& t );
/** print debug */
void debugPrint( const char* c );
private:
/** */
int d_counter;
/** constants */
Node d_zero;
Node d_negOne;
/** process functions */
void processResetInstantiationRound( Theory::Effort effort );
void process( Node f, Theory::Effort effort, int e );
public:
InstStrategySimplex( arith::TheoryArith* th, QuantifiersEngine* ie );
~InstStrategySimplex() throw() {}
/** identify */
std::string identify() const { return std::string("Simplex"); }
};
//generalized counterexample guided quantifier instantiation
class InstStrategyCegqi;
class CegqiOutputInstStrategy : public CegqiOutput {
public:
CegqiOutputInstStrategy( InstStrategyCegqi * out ) : d_out( out ){}
InstStrategyCegqi * d_out;
bool addInstantiation( std::vector< Node >& subs );
bool isEligibleForInstantiation( Node n );
bool addLemma( Node lem );
};
class InstStrategyCegqi : public InstStrategyCbqi {
protected:
CegqiOutputInstStrategy * d_out;
std::map< Node, CegInstantiator * > d_cinst;
Node d_small_const;
Node d_curr_quant;
bool d_check_vts_lemma_lc;
/** process functions */
void processResetInstantiationRound( Theory::Effort effort );
void process( Node f, Theory::Effort effort, int e );
/** register ce lemma */
void registerCounterexampleLemma( Node q, Node lem );
public:
InstStrategyCegqi( QuantifiersEngine * qe );
~InstStrategyCegqi() throw();
bool addInstantiation( std::vector< Node >& subs );
bool isEligibleForInstantiation( Node n );
bool addLemma( Node lem );
/** identify */
std::string identify() const { return std::string("Cegqi"); }
//get instantiator for quantifier
CegInstantiator * getInstantiator( Node q );
//register quantifier
void registerQuantifier( Node q );
//presolve
void presolve();
};
}
}
}
#endif
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