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#include "cvc4_private.h"
#ifndef __CVC4__THEORY__ARITH__ARITH_STATIC_LEARNER_H
#define __CVC4__THEORY__ARITH__ARITH_STATIC_LEARNER_H
#include "util/stats.h"
#include "theory/arith/arith_utilities.h"
#include <set>
namespace CVC4 {
namespace theory {
namespace arith {
class ArithStaticLearner {
private:
typedef __gnu_cxx::hash_set<TNode, TNodeHashFunction> TNodeSet;
/* Maps a variable, x, to the set of defTrue nodes of the form
* (=> _ (= x c))
* where c is a constant.
*/
typedef __gnu_cxx::hash_map<Node, std::set<Node>, NodeHashFunction> VarToNodeSetMap;
VarToNodeSetMap d_miplibTrick;
public:
ArithStaticLearner();
void staticLearning(TNode n, NodeBuilder<>& learned);
void clear();
private:
void process(TNode n, NodeBuilder<>& learned, const TNodeSet& defTrue);
void postProcess(NodeBuilder<>& learned);
void iteMinMax(TNode n, NodeBuilder<>& learned);
void iteConstant(TNode n, NodeBuilder<>& learned);
void miplibTrick(TNode var, std::set<Rational>& values, NodeBuilder<>& learned);
/** These fields are designed to be accessable to ArithStaticLearner methods. */
class Statistics {
public:
IntStat d_iteMinMaxApplications;
IntStat d_iteConstantApplications;
IntStat d_miplibtrickApplications;
AverageStat d_avgNumMiplibtrickValues;
Statistics();
~Statistics();
};
Statistics d_statistics;
};/* class ArithStaticLearner */
}/* CVC4::theory::arith namespace */
}/* CVC4::theory namespace */
}/* CVC4 namespace */
#endif /* __CVC4__THEORY__ARITH__ARITH_STATIC_LEARNER_H */
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