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/*
* This file is part of the source code of the software program
* Vampire. It is protected by applicable
* copyright laws.
*
* This source code is distributed under the licence found here
* https://vprover.github.io/license.html
* and in the source directory
*/
/**
* @file Grounder.hpp
* Defines class Grounder.
*/
#ifndef __Grounder__
#define __Grounder__
#include "Forwards.hpp"
#include "Lib/DHMap.hpp"
namespace Kernel {
using namespace Lib;
using namespace SAT;
class GlobalSubsumptionGrounder {
struct OrderNormalizingComparator;
public:
GlobalSubsumptionGrounder(SATSolver &satSolver) : _satSolver(satSolver) {}
/**
* Return SATClause that is a result of grounding of the
* non-propositional part of @c cl.
*
* The order of literals in @c cl is preserved.
*
* @param cl the clause
* @param acc previously accumulated literals
*/
void groundNonProp(Clause* cl, SATLiteralStack& acc);
private:
/**
* Normalize literals before grounding.
*
* The order of literals in @c lits must be preserved.
*/
void normalize(unsigned cnt, Literal** lits);
/**
* Return SATLiteral corresponding to @c lit.
*/
SATLiteral groundLiteral(Literal* lit);
/**
* Return SATLiteral corresponding to @c lit.
*/
SATLiteral groundNormalized(Literal*);
/** Map from positive literals to SAT variable numbers */
DHMap<Literal*, unsigned> _asgn;
/** Reference to a SATSolver instance for which the grounded clauses
* are being prepared. Used to request new variables from the Solver.
*
* Also used to communicate source literals with IGGrounder. */
SATSolver &_satSolver;
};
}
#endif // __Grounder__