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/********************* */
/*! \file inst_strategy_e_matching.h
** \verbatim
** Top contributors (to current version):
** Morgan Deters, Andrew Reynolds, Mathias Preiner
** 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 E matching instantiation strategies
**/
#include "cvc4_private.h"
#ifndef CVC4__INST_STRATEGY_E_MATCHING_H
#define CVC4__INST_STRATEGY_E_MATCHING_H
#include "theory/quantifiers/ematching/inst_strategy.h"
#include "theory/quantifiers/ematching/trigger.h"
#include "theory/quantifiers/quant_relevance.h"
namespace CVC4 {
namespace theory {
namespace quantifiers {
/**
* This class is responsible for instantiating quantifiers based on
* automatically generated triggers. It selects pattern terms, generates
* and manages triggers, and uses a strategy for processing them.
*/
class InstStrategyAutoGenTriggers : public InstStrategy
{
public:
enum
{
RELEVANCE_NONE,
RELEVANCE_DEFAULT,
};
private:
/** trigger generation strategy */
options::TriggerSelMode d_tr_strategy;
/** regeneration */
bool d_regenerate;
int d_regenerate_frequency;
/** (single,multi) triggers for each quantifier */
std::map<Node, std::map<inst::Trigger*, bool> > d_auto_gen_trigger[2];
std::map<Node, int> d_counter;
/** single, multi triggers for each quantifier */
std::map<Node, std::vector<Node> > d_patTerms[2];
std::map<Node, std::map<Node, bool> > d_patReqPol;
/** information about triggers */
std::map<Node, bool> d_is_single_trigger;
std::map<Node, bool> d_single_trigger_gen;
std::map<Node, bool> d_made_multi_trigger;
// processed trigger this round
std::map<Node, std::map<inst::Trigger*, bool> > d_processed_trigger;
// instantiation no patterns
std::map<Node, std::vector<Node> > d_user_no_gen;
// number of trigger variables per quantifier
std::map<Node, unsigned> d_num_trigger_vars;
std::map<Node, Node> d_vc_partition[2];
std::map<Node, Node> d_pat_to_mpat;
private:
/** process functions */
void processResetInstantiationRound(Theory::Effort effort) override;
/** Process */
InstStrategyStatus process(Node q, Theory::Effort effort, int e) override;
/**
* Generate triggers for quantified formula q.
*/
void generateTriggers(Node q);
/**
* Generate pattern terms for quantified formula q.
*/
bool generatePatternTerms(Node q);
void addPatternToPool(Node q, Node pat, unsigned num_fv, Node mpat);
void addTrigger(inst::Trigger* tr, Node f);
/** has user patterns */
bool hasUserPatterns(Node q);
/** has user patterns */
std::map<Node, bool> d_hasUserPatterns;
public:
InstStrategyAutoGenTriggers(QuantifiersEngine* qe,
QuantifiersState& qs,
QuantRelevance* qr);
~InstStrategyAutoGenTriggers() {}
/** get auto-generated trigger */
inst::Trigger* getAutoGenTrigger(Node q);
/** identify */
std::string identify() const override
{
return std::string("AutoGenTriggers");
}
/** add pattern */
void addUserNoPattern(Node q, Node pat);
private:
/**
* Pointer to the module that computes relevance of quantifiers, which is
* owned by the instantiation engine that owns this class.
*/
QuantRelevance* d_quant_rel;
}; /* class InstStrategyAutoGenTriggers */
}
}/* CVC4::theory namespace */
}/* CVC4 namespace */
#endif
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