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author | ajreynol <andrew.j.reynolds@gmail.com> | 2017-03-02 15:24:07 -0600 |
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committer | ajreynol <andrew.j.reynolds@gmail.com> | 2017-03-02 15:24:07 -0600 |
commit | 96b699bc6cccd1ade32e2d5ef73ce004063b8201 (patch) | |
tree | 8128f4bd212c87cc193f11648a136bd4236fbf83 /src/smt/term_formula_removal.h | |
parent | 1f4b954a2cc7667a56a3007fa75c125fba93ed23 (diff) |
Minor cleanup and reorganization related to last commit.
Diffstat (limited to 'src/smt/term_formula_removal.h')
-rw-r--r-- | src/smt/term_formula_removal.h | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/src/smt/term_formula_removal.h b/src/smt/term_formula_removal.h new file mode 100644 index 000000000..09991c571 --- /dev/null +++ b/src/smt/term_formula_removal.h @@ -0,0 +1,93 @@ +/********************* */ +/*! \file term_formula_removal.h + ** \verbatim + ** Top contributors (to current version): + ** Morgan Deters, Dejan Jovanovic, Tim King + ** This file is part of the CVC4 project. + ** Copyright (c) 2009-2016 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 Removal of term formulas + ** + ** Removal of term formulas. + **/ + +#include "cvc4_private.h" + +#pragma once + +#include <vector> + +#include "context/cdinsert_hashmap.h" +#include "context/context.h" +#include "expr/node.h" +#include "smt/dump.h" +#include "util/bool.h" +#include "util/hash.h" + +namespace CVC4 { + +namespace theory { + class ContainsTermITEVisitor; +}/* CVC4::theory namespace */ + +typedef std::hash_map<Node, unsigned, NodeHashFunction> IteSkolemMap; + +class RemoveTermFormulas { + typedef context::CDInsertHashMap< std::pair<Node, int>, Node, PairHashFunction<Node, int, NodeHashFunction, BoolHashFunction> > ITECache; + ITECache d_iteCache; + + static inline int cacheVal( bool inQuant, bool inTerm ) { return (inQuant ? 1 : 0) + 2*(inTerm ? 1 : 0); } +public: + + RemoveTermFormulas(context::UserContext* u); + ~RemoveTermFormulas(); + + /** + * Removes the ITE nodes by introducing skolem variables. All + * additional assertions are pushed into assertions. iteSkolemMap + * contains a map from introduced skolem variables to the index in + * assertions containing the new Boolean ite created in conjunction + * with that skolem variable. + * + * With reportDeps true, report reasoning dependences to the proof + * manager (for unsat cores). + */ + void run(std::vector<Node>& assertions, IteSkolemMap& iteSkolemMap, bool reportDeps = false); + + /** + * Removes the ITE from the node by introducing skolem + * variables. All additional assertions are pushed into + * assertions. iteSkolemMap contains a map from introduced skolem + * variables to the index in assertions containing the new Boolean + * ite created in conjunction with that skolem variable. + */ + Node run(TNode node, std::vector<Node>& additionalAssertions, + IteSkolemMap& iteSkolemMap, bool inQuant, bool inTerm); + + /** + * Substitute under node using pre-existing cache. Do not remove + * any ITEs not seen during previous runs. + */ + Node replace(TNode node, bool inQuant = false, bool inTerm = false) const; + + /** Returns true if e contains a term ite. */ + bool containsTermITE(TNode e) const; + + /** Returns the collected size of the caches. */ + size_t collectedCacheSizes() const; + + /** Garbage collects non-context dependent data-structures. */ + void garbageCollect(); + + /** Return the RemoveTermFormulas's containsVisitor. */ + theory::ContainsTermITEVisitor* getContainsVisitor(); + +private: + theory::ContainsTermITEVisitor* d_containsVisitor; + +};/* class RemoveTTE */ + +}/* CVC4 namespace */ |