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/********************* */
/*! \file nl_lemma_utils.h
** \verbatim
** Top contributors (to current version):
** Andrew Reynolds
** This file is part of the CVC4 project.
** Copyright (c) 2009-2019 by the authors listed in the file AUTHORS
** in the top-level source directory) and their institutional affiliations.
** All rights reserved. See the file COPYING in the top-level source
** directory for licensing information.\endverbatim
**
** \brief Utilities for processing lemmas from the non-linear solver
**/
#ifndef CVC4__THEORY__ARITH__NL_LEMMA_UTILS_H
#define CVC4__THEORY__ARITH__NL_LEMMA_UTILS_H
#include <tuple>
#include <vector>
#include "expr/node.h"
namespace CVC4 {
namespace theory {
namespace arith {
/**
* A side effect of adding a lemma in the non-linear solver. This is used
* to specify how the state of the non-linear solver should update. This
* includes:
* - A set of secant points to record (for transcendental secant plane
* inferences).
*/
struct NlLemmaSideEffect
{
NlLemmaSideEffect() {}
~NlLemmaSideEffect() {}
/** secant points to add
*
* A member (tf, d, c) in this vector indicates that point c should be added
* to the list of secant points for an application of a transcendental
* function tf for Taylor degree d. This is used for incremental linearization
* for underapproximation (resp. overapproximations) of convex (resp.
* concave) regions of transcendental functions. For details, see
* Cimatti et al., CADE 2017.
*/
std::vector<std::tuple<Node, unsigned, Node> > d_secantPoint;
};
} // namespace arith
} // namespace theory
} // namespace CVC4
#endif /* CVC4__THEORY__ARITH__NL_LEMMA_UTILS_H */
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