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/********************* */
/*! \file theory_bv.h
** \verbatim
** Original author: mdeters
** Major contributors: dejan
** 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 Bitvector theory.
**
** Bitvector theory.
**/
#include "cvc4_private.h"
#ifndef __CVC4__THEORY__BV__THEORY_BV_H
#define __CVC4__THEORY__BV__THEORY_BV_H
#include "theory/theory.h"
#include "context/context.h"
#include "context/cdlist.h"
#include "context/cdhashset.h"
#include "theory/bv/theory_bv_utils.h"
#include "util/stats.h"
#include "theory/uf/equality_engine.h"
#include "context/cdqueue.h"
namespace BVMinisat {
class SimpSolver;
}
namespace CVC4 {
namespace theory {
namespace bv {
/// forward declarations
class Bitblaster;
static inline std::string spaces(int level)
{
std::string indentStr(level, ' ');
return indentStr;
}
class TheoryBV : public Theory {
private:
/** The context we are using */
context::Context* d_context;
/** The asserted stuff */
context::CDList<TNode> d_assertions;
/** Bitblaster */
Bitblaster* d_bitblaster;
Node d_true;
Node d_false;
/** Context dependent set of atoms we already propagated */
context::CDHashSet<TNode, TNodeHashFunction> d_alreadyPropagatedSet;
public:
TheoryBV(context::Context* c, context::UserContext* u, OutputChannel& out, Valuation valuation);
~TheoryBV();
void preRegisterTerm(TNode n);
//void registerTerm(TNode n) { }
void check(Effort e);
Node explain(TNode n);
Node getValue(TNode n);
std::string identify() const { return std::string("TheoryBV"); }
//Node preprocessTerm(TNode term);
PPAssertStatus ppAssert(TNode in, SubstitutionMap& outSubstitutions);
private:
class Statistics {
public:
AverageStat d_avgConflictSize;
IntStat d_solveSubstitutions;
TimerStat d_solveTimer;
Statistics();
~Statistics();
};
Statistics d_statistics;
// Added by Clark
// NotifyClass: template helper class for d_equalityEngine - handles call-back from congruence closure module
class NotifyClass {
TheoryBV& d_bv;
public:
NotifyClass(TheoryBV& uf): d_bv(uf) {}
bool notify(TNode propagation) {
Debug("bitvector") << spaces(d_bv.getContext()->getLevel()) << "NotifyClass::notify(" << propagation << ")" << std::endl;
// Just forward to bv
return d_bv.propagate(propagation);
}
void notify(TNode t1, TNode t2) {
Debug("arrays") << spaces(d_bv.getContext()->getLevel()) << "NotifyClass::notify(" << t1 << ", " << t2 << ")" << std::endl;
// Propagate equality between shared terms
Node equality = Rewriter::rewriteEquality(theory::THEORY_UF, t1.eqNode(t2));
d_bv.propagate(t1.eqNode(t2));
}
};
/** The notify class for d_equalityEngine */
NotifyClass d_notify;
/** Equaltity engine */
uf::EqualityEngine<NotifyClass> d_equalityEngine;
// Are we in conflict?
context::CDO<bool> d_conflict;
/** The conflict node */
Node d_conflictNode;
/** Literals to propagate */
context::CDList<Node> d_literalsToPropagate;
/** Index of the next literal to propagate */
context::CDO<unsigned> d_literalsToPropagateIndex;
context::CDQueue<Node> d_toBitBlast;
/** Should be called to propagate the literal. */
bool propagate(TNode literal);
/** Explain why this literal is true by adding assumptions */
void explain(TNode literal, std::vector<TNode>& assumptions);
void addSharedTerm(TNode t);
EqualityStatus getEqualityStatus(TNode a, TNode b);
public:
void propagate(Effort e);
};/* class TheoryBV */
}/* CVC4::theory::bv namespace */
}/* CVC4::theory namespace */
}/* CVC4 namespace */
#endif /* __CVC4__THEORY__BV__THEORY_BV_H */
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