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/********************* */
/*! \file inference_id.h
** \verbatim
** Top contributors (to current version):
** Andrew Reynolds, Gereon Kremer
** This file is part of the CVC4 project.
** Copyright (c) 2009-2020 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 Inference enumeration for arithmetic.
**/
#include "cvc4_private.h"
#ifndef CVC4__THEORY__ARITH__INFERENCE_ID_H
#define CVC4__THEORY__ARITH__INFERENCE_ID_H
#include <map>
#include <vector>
#include "util/safe_print.h"
namespace CVC4 {
namespace theory {
namespace arith {
/**
* Types of inferences used in the procedure
*/
enum class InferenceId : uint32_t
{
//-------------------- core
// simple congruence x=y => f(x)=f(y)
NL_CONGRUENCE,
// shared term value split (for naive theory combination)
NL_SHARED_TERM_VALUE_SPLIT,
//-------------------- incremental linearization solver
// splitting on zero (NlSolver::checkSplitZero)
NL_SPLIT_ZERO,
// based on sign (NlSolver::checkMonomialSign)
NL_SIGN,
// based on comparing (abs) model values (NlSolver::checkMonomialMagnitude)
NL_COMPARISON,
// based on inferring bounds (NlSolver::checkMonomialInferBounds)
NL_INFER_BOUNDS,
// same as above, for inferences that introduce new terms
NL_INFER_BOUNDS_NT,
// factoring (NlSolver::checkFactoring)
NL_FACTOR,
// resolution bound inferences (NlSolver::checkMonomialInferResBounds)
NL_RES_INFER_BOUNDS,
// tangent planes (NlSolver::checkTangentPlanes)
NL_TANGENT_PLANE,
//-------------------- transcendental solver
// purification of arguments to transcendental functions
NL_T_PURIFY_ARG,
// initial refinement (TranscendentalSolver::checkTranscendentalInitialRefine)
NL_T_INIT_REFINE,
// pi bounds
NL_T_PI_BOUND,
// monotonicity (TranscendentalSolver::checkTranscendentalMonotonic)
NL_T_MONOTONICITY,
// tangent refinement (TranscendentalSolver::checkTranscendentalTangentPlanes)
NL_T_TANGENT,
// secant refinement, the dual of the above inference
NL_T_SECANT,
//-------------------- iand solver
// initial refinements (IAndSolver::checkInitialRefine)
NL_IAND_INIT_REFINE,
// value refinements (IAndSolver::checkFullRefine)
NL_IAND_VALUE_REFINE,
//-------------------- cad solver
// conflict / infeasible subset obtained from cad
NL_CAD_CONFLICT,
// excludes an interval for a single variable
NL_CAD_EXCLUDED_INTERVAL,
//-------------------- icp solver
// conflict obtained from icp
NL_ICP_CONFLICT,
// propagation / contraction of variable bounds from icp
NL_ICP_PROPAGATION,
//-------------------- unknown
UNKNOWN,
};
/**
* Converts an inference to a string. Note: This function is also used in
* `safe_print()`. Changing this functions name or signature will result in
* `safe_print()` printing "<unsupported>" instead of the proper strings for
* the enum values.
*
* @param i The inference
* @return The name of the inference
*/
const char* toString(InferenceId i);
/**
* Writes an inference name to a stream.
*
* @param out The stream to write to
* @param i The inference to write to the stream
* @return The stream
*/
std::ostream& operator<<(std::ostream& out, InferenceId i);
} // namespace arith
} // namespace theory
} // namespace CVC4
#endif /* CVC4__THEORY__ARITH__INFERENCE_H */
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