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/********************* */
/** theory_arith.h
** Original author: mdeters
** Major contributors: taking
** Minor contributors (to current version): none
** This file is part of the CVC4 prototype.
** Copyright (c) 2009, 2010 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.
**
** Arithmetic theory.
**/
#include "cvc4_private.h"
#ifndef __CVC4__THEORY__ARITH__THEORY_ARITH_H
#define __CVC4__THEORY__ARITH__THEORY_ARITH_H
#include "theory/theory.h"
#include "context/context.h"
#include "context/cdlist.h"
#include "expr/node.h"
#include "theory/arith/delta_rational.h"
#include "theory/arith/tableau.h"
#include "theory/arith/arith_rewriter.h"
#include "theory/arith/partial_model.h"
#include <vector>
namespace CVC4 {
namespace theory {
namespace arith {
class TheoryArith : public Theory {
private:
/* Chopping block begins */
std::vector<Node> d_splits;
//This stores the eager splits sent out of the theory.
//TODO get rid of this.
context::CDList<Node> d_preprocessed;
//TODO This is currently needed to save preprocessed nodes that may not
//currently have an outisde reference. Get rid of when preprocessing is occuring
//correctly.
std::vector<Node> d_variables;
//TODO get rid of this. Currently forces every variable and skolem constant that
// can hit the tableau to stay alive forever!
//This needs to come before d_partialModel and d_tableau in the file
/* Chopping block ends */
ArithConstants d_constants;
ArithPartialModel d_partialModel;
context::CDList<Node> d_diseq;
Tableau d_tableau;
ArithRewriter d_rewriter;
public:
TheoryArith(context::Context* c, OutputChannel& out);
~TheoryArith();
Node rewrite(TNode n);
void preRegisterTerm(TNode n);
void registerTerm(TNode n);
void check(Effort e);
void propagate(Effort e) { Unimplemented(); }
void explain(TNode n, Effort e) { Unimplemented(); }
private:
void AssertLower(TNode n, TNode orig);
void AssertUpper(TNode n, TNode orig);
void update(TNode x_i, DeltaRational& v);
void pivotAndUpdate(TNode x_i, TNode x_j, DeltaRational& v);
Node updateInconsistentVars();
TNode selectSlackBelow(TNode x_i);
TNode selectSlackAbove(TNode x_i);
TNode selectSmallestInconsistentVar();
Node generateConflictAbove(TNode conflictVar);
Node generateConflictBelow(TNode conflictVar);
//TODO get rid of this!
Node simulatePreprocessing(TNode n);
void setupVariable(TNode x){
Assert(x.getMetaKind() == kind::metakind::VARIABLE);
d_partialModel.setAssignment(x,d_constants.d_ZERO_DELTA);
d_variables.push_back(Node(x));
Debug("arithgc") << "setupVariable("<<x<<")"<<std::endl;
};
};
}/* CVC4::theory::arith namespace */
}/* CVC4::theory namespace */
}/* CVC4 namespace */
#endif /* __CVC4__THEORY__ARITH__THEORY_ARITH_H */
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