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/********************* */
/*! \file sequences_stats.h
** \verbatim
** Top contributors (to current version):
** Andrew Reynolds, Andres Noetzli, Gereon Kremer
** This file is part of the CVC4 project.
** Copyright (c) 2009-2021 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 Statistics for the theory of strings/sequences
**/
#include "cvc4_private.h"
#ifndef CVC4__THEORY__STRINGS__SEQUENCES_STATS_H
#define CVC4__THEORY__STRINGS__SEQUENCES_STATS_H
#include "expr/kind.h"
#include "theory/strings/infer_info.h"
#include "theory/strings/rewrites.h"
#include "util/statistics_registry.h"
namespace CVC4 {
namespace theory {
namespace strings {
/**
* Statistics for the theory of strings.
*
* This is roughly broken up into the following parts:
* (1) Inferences,
* (2) Conflicts,
* (3) Lemmas.
*
* "Inferences" (1) are steps invoked during solving, which either trigger:
* (a) An internal update to the state of the solver (e.g. adding an inferred
* equality to the equality engine),
* (b) A call to OutputChannel::conflict,
* (c) A call to OutputChannel::lemma.
* For details, see InferenceManager. We track stats on each kind of
* inference that have been indicated by the solvers in TheoryStrings.
* Some kinds of inferences are further distinguished by the Kind of the node
* they operate on (see d_cdSimplifications, d_reductions, d_regexpUnfoldings).
*
* "Conflicts" (2) arise from various kinds of reasoning, listed below,
* where inferences are one of the possible methods for deriving conflicts.
*
* "Lemmas" (3) also arise from various kinds of reasoning, listed below,
* where inferences are one of the possible methods for deriving lemmas.
*/
class SequencesStatistics
{
public:
SequencesStatistics();
~SequencesStatistics();
/** Number of calls to run a check where strategy is present */
IntStat d_checkRuns;
/** Number of calls to run the strategy */
IntStat d_strategyRuns;
//--------------- inferences
/**
* Counts the number of applications of each type of inference that were not
* processed as a proof step. This is a subset of the statistics in
* TheoryInferenceManager, i.e.
* (theory::strings::inferences{Facts,Lemmas,Conflicts}).
*/
HistogramStat<InferenceId> d_inferencesNoPf;
/**
* Counts the number of applications of each type of context-dependent
* simplification. The sum of this map is equal to the number of EXTF or
* EXTF_N inferences.
*/
HistogramStat<Kind> d_cdSimplifications;
/**
* Counts the number of applications of each type of reduction. The sum of
* this map is equal to the number of REDUCTION inferences (when
* options::stringLazyPreproc is true).
*/
HistogramStat<Kind> d_reductions;
/**
* Counts the number of applications of each type of regular expression
* positive (resp. negative) unfoldings. The sum of this map is equal to the
* number of RE_UNFOLD_POS (resp. RE_UNFOLD_NEG) inferences.
*/
HistogramStat<Kind> d_regexpUnfoldingsPos;
HistogramStat<Kind> d_regexpUnfoldingsNeg;
//--------------- end of inferences
/** Counts the number of applications of each type of rewrite rule */
HistogramStat<Rewrite> d_rewrites;
//--------------- conflicts, partition of calls to OutputChannel::conflict
/** Number of equality engine conflicts */
IntStat d_conflictsEqEngine;
/** Number of eager conflicts */
IntStat d_conflictsEager;
/** Number of inference conflicts */
IntStat d_conflictsInfer;
//--------------- end of conflicts
//--------------- lemmas, partition of calls to OutputChannel::lemma
/** Number of lemmas added due to eager preprocessing */
IntStat d_lemmasEagerPreproc;
/** Number of collect model info splits */
IntStat d_lemmasCmiSplit;
/** Number of lemmas added due to registering terms */
IntStat d_lemmasRegisterTerm;
/** Number of lemmas added due to registering atomic terms */
IntStat d_lemmasRegisterTermAtomic;
/** Number of lemmas added due to inferences */
IntStat d_lemmasInfer;
//--------------- end of lemmas
};
}
}
}
#endif /* CVC4__THEORY__STRINGS__SEQUENCES_STATS_H */
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