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/********************* */
/*! \file model.h
** \verbatim
** Original author: ajreynol
** Major contributors: none
** Minor contributors (to current version): none
** This file is part of the CVC4 prototype.
** Copyright (c) 2009, 2010, 2011 The Analysis of Computer Systems Group (ACSys)
** Courant Institute of Mathematical Sciences
** New York University
** See the file COPYING in the top-level source directory for licensing
** information.\endverbatim
**
** \brief Model class
**/
#include "cvc4_private.h"
#ifndef __CVC4__THEORY_MODEL_H
#define __CVC4__THEORY_MODEL_H
#include "util/model.h"
#include "theory/uf/equality_engine.h"
namespace CVC4 {
namespace theory {
class QuantifiersEngine;
/** this class stores a representative set */
class RepSet {
public:
RepSet(){}
~RepSet(){}
std::map< TypeNode, std::vector< Node > > d_type_reps;
std::map< Node, int > d_tmap;
/** clear the set */
void clear();
/** has type */
bool hasType( TypeNode tn ) { return d_type_reps.find( tn )!=d_type_reps.end(); }
/** add representative for type */
void add( Node n );
/** set the representatives for type */
void set( TypeNode t, std::vector< Node >& reps );
/** returns index in d_type_reps for node n */
int getIndexFor( Node n ) { return d_tmap.find( n )!=d_tmap.end() ? d_tmap[n] : -1; }
/** debug print */
void toStream(std::ostream& out);
};
//representative domain
typedef std::vector< int > RepDomain;
class TheoryEngineModelBuilder;
/** Theory Model class
* For Model m, should call m.initialize() before using
*/
class TheoryModel : public Model
{
friend class TheoryEngineModelBuilder;
protected:
/** add term */
virtual void addTerm( Node n ) {}
private:
/** definitions */
std::vector< Node > d_define_funcs;
std::vector< TypeNode > d_define_types;
std::vector< int > d_defines;
protected:
/** to stream functions */
virtual void toStreamFunction( Node n, std::ostream& out );
virtual void toStreamType( TypeNode tn, std::ostream& out );
public:
TheoryModel( context::Context* c, std::string name );
virtual ~TheoryModel(){}
/** equality engine containing all known equalities/disequalities */
eq::EqualityEngine d_equalityEngine;
/** map of representatives of equality engine to used representatives in representative set */
std::map< Node, Node > d_reps;
/** representative alphabet */
RepSet d_ra;
//true/false nodes
Node d_true;
Node d_false;
public:
/** add defined function */
void addDefineFunction( Node n );
/** add defined type */
void addDefineType( TypeNode tn );
/**
* Get value function. This should be called only after a ModelBuilder has called buildModel(...)
* on this model.
*/
Node getValue( TNode n );
/** get interpreted value, should be a representative in d_reps */
virtual Node getInterpretedValue( TNode n ) = 0;
/** get existing domain value, with possible exclusions */
Node getDomainValue( TypeNode tn, std::vector< Node >& exclude );
/** get new domain value */
Node getNewDomainValue( TypeNode tn );
public:
/** assert equality */
void assertEquality( Node a, Node b, bool polarity );
/** assert predicate */
void assertPredicate( Node a, bool polarity );
/** assert equality engine */
void assertEqualityEngine( eq::EqualityEngine* ee );
public:
//queries about equality
bool hasTerm( Node a );
Node getRepresentative( Node a );
bool areEqual( Node a, Node b );
bool areDisequal( Node a, Node b );
public:
/** print representative function */
void printRepresentativeDebug( const char* c, Node r );
void printRepresentative( std::ostream& out, Node r );
/** to stream function */
void toStream( std::ostream& out );
};
//default model class: extends model arbitrarily
class DefaultModel : public TheoryModel
{
public:
DefaultModel( context::Context* c, std::string name );
virtual ~DefaultModel(){}
public:
Node getInterpretedValue( TNode n );
};
//incomplete model class: does not extend model
class IncompleteModel : public TheoryModel
{
public:
IncompleteModel( context::Context* c, std::string name ) : TheoryModel( c, name ){}
virtual ~IncompleteModel(){}
public:
Node getInterpretedValue( TNode n ) { return Node::null(); }
};
class TheoryEngineModelBuilder : public ModelBuilder
{
protected:
/** pointer to theory engine */
TheoryEngine* d_te;
/** choose representative */
virtual Node chooseRepresentative( TheoryModel* tm, Node eqc );
/** representatives that are current not set */
virtual void processBuildModel( TheoryModel* tm );
public:
TheoryEngineModelBuilder( TheoryEngine* te );
virtual ~TheoryEngineModelBuilder(){}
/**
* Build model function.
*/
void buildModel( Model* m );
};
}
}
#endif
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