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/********************* */
/*! \file instantiation_engine.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 Instantiation Engine classes
**/
#include "cvc4_private.h"
#ifndef __CVC4__THEORY__QUANTIFIERS__INSTANTIATION_ENGINE_H
#define __CVC4__THEORY__QUANTIFIERS__INSTANTIATION_ENGINE_H
#include "theory/quantifiers_engine.h"
#include "theory/quantifiers/theory_quantifiers.h"
namespace CVC4 {
namespace theory {
namespace quantifiers {
class InstStrategyUserPatterns;
class InstStrategyAutoGenTriggers;
class InstStrategyFreeVariable;
/** instantiation strategy class */
class InstStrategy {
public:
enum Status {
STATUS_UNFINISHED,
STATUS_UNKNOWN,
};/* enum Status */
protected:
/** reference to the instantiation engine */
QuantifiersEngine* d_quantEngine;
public:
InstStrategy( QuantifiersEngine* qe ) : d_quantEngine( qe ){}
virtual ~InstStrategy(){}
/** presolve */
virtual void presolve() {}
/** reset instantiation */
virtual void processResetInstantiationRound( Theory::Effort effort ) = 0;
/** process method, returns a status */
virtual int process( Node f, Theory::Effort effort, int e ) = 0;
/** identify */
virtual std::string identify() const { return std::string("Unknown"); }
/** register quantifier */
//virtual void registerQuantifier( Node q ) {}
};/* class InstStrategy */
class InstantiationEngine : public QuantifiersModule
{
private:
/** instantiation strategies */
std::vector< InstStrategy* > d_instStrategies;
/** user-pattern instantiation strategy */
InstStrategyUserPatterns* d_isup;
/** auto gen triggers; only kept for destructor cleanup */
InstStrategyAutoGenTriggers* d_i_ag;
private:
typedef context::CDHashMap< Node, bool, NodeHashFunction > BoolMap;
/** current processing quantified formulas */
std::vector< Node > d_quants;
private:
/** is the engine incomplete for this quantifier */
bool isIncomplete( Node q );
/** do instantiation round */
bool doInstantiationRound( Theory::Effort effort );
public:
InstantiationEngine( QuantifiersEngine* qe );
~InstantiationEngine();
void presolve();
bool needsCheck( Theory::Effort e );
void reset_round( Theory::Effort e );
void check( Theory::Effort e, unsigned quant_e );
bool checkComplete();
void registerQuantifier( Node q );
Node explain(TNode n){ return Node::null(); }
/** add user pattern */
void addUserPattern( Node q, Node pat );
void addUserNoPattern( Node q, Node pat );
public:
/** Identify this module */
std::string identify() const { return "InstEngine"; }
};/* class InstantiationEngine */
}/* CVC4::theory::quantifiers namespace */
}/* CVC4::theory namespace */
}/* CVC4 namespace */
#endif /* __CVC4__THEORY__QUANTIFIERS__INSTANTIATION_ENGINE_H */
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