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/****************************************************************************** |
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* Top contributors (to current version): |
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* Andrew Reynolds, Aina Niemetz, Haniel Barbosa |
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* |
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* This file is part of the cvc5 project. |
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* |
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* Copyright (c) 2009-2021 by the authors listed in the file AUTHORS |
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* in the top-level source directory and their institutional affiliations. |
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* All rights reserved. See the file COPYING in the top-level source |
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* directory for licensing information. |
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* **************************************************************************** |
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* |
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* Implementation of sygus_unif. |
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*/ |
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#include "theory/quantifiers/sygus/sygus_unif.h" |
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#include "theory/datatypes/sygus_datatype_utils.h" |
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#include "theory/quantifiers/sygus/term_database_sygus.h" |
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#include "theory/quantifiers/term_util.h" |
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#include "util/random.h" |
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using namespace std; |
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using namespace cvc5::kind; |
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namespace cvc5 { |
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namespace theory { |
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namespace quantifiers { |
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SygusUnif::SygusUnif(Env& env) |
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: EnvObj(env), d_tds(nullptr), d_enableMinimality(false) |
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{ |
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} |
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SygusUnif::~SygusUnif() {} |
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void SygusUnif::initializeCandidate( |
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TermDbSygus* tds, |
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Node f, |
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std::vector<Node>& enums, |
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std::map<Node, std::vector<Node>>& strategy_lemmas) |
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{ |
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d_tds = tds; |
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d_candidates.push_back(f); |
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// initialize the strategy |
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d_strategy.emplace(f, SygusUnifStrategy(d_env)); |
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d_strategy.at(f).initialize(tds, f, enums); |
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} |
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Node SygusUnif::getMinimalTerm(const std::vector<Node>& terms) |
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{ |
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unsigned minSize = 0; |
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Node minTerm; |
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std::map<Node, unsigned>::iterator it; |
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for (const Node& n : terms) |
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{ |
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it = d_termToSize.find(n); |
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unsigned ssize = 0; |
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if (it == d_termToSize.end()) |
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{ |
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ssize = datatypes::utils::getSygusTermSize(n); |
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d_termToSize[n] = ssize; |
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} |
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else |
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{ |
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ssize = it->second; |
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} |
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if (minTerm.isNull() || ssize < minSize) |
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{ |
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minTerm = n; |
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minSize = ssize; |
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} |
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} |
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return minTerm; |
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} |
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Node SygusUnif::constructBestSolvedTerm(Node e, const std::vector<Node>& solved) |
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{ |
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Assert(!solved.empty()); |
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if (d_enableMinimality) |
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{ |
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return getMinimalTerm(solved); |
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} |
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return solved[0]; |
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} |
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Node SygusUnif::constructBestConditional(Node ce, |
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const std::vector<Node>& conds) |
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{ |
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Assert(!conds.empty()); |
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double r = Random::getRandom().pickDouble(0.0, 1.0); |
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unsigned cindex = r * conds.size(); |
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if (cindex > conds.size()) |
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{ |
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cindex = conds.size() - 1; |
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} |
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return conds[cindex]; |
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} |
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Node SygusUnif::constructBestStringToConcat( |
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const std::vector<Node>& strs, |
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const std::map<Node, size_t>& total_inc, |
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const std::map<Node, std::vector<size_t>>& incr) |
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{ |
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Assert(!strs.empty()); |
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std::vector<Node> strs_tmp = strs; |
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std::shuffle(strs_tmp.begin(), strs_tmp.end(), Random::getRandom()); |
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// prefer one that has incremented by more than 0 |
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for (const Node& ns : strs_tmp) |
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{ |
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const std::map<Node, size_t>::const_iterator iti = total_inc.find(ns); |
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if (iti != total_inc.end() && iti->second > 0) |
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{ |
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return ns; |
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} |
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} |
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return strs_tmp[0]; |
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} |
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void SygusUnif::indent(const char* c, int ind) |
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{ |
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if (Trace.isOn(c)) |
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{ |
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for (int i = 0; i < ind; i++) |
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{ |
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Trace(c) << " "; |
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} |
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} |
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} |
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void SygusUnif::print_val(const char* c, std::vector<Node>& vals, bool pol) |
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{ |
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if (Trace.isOn(c)) |
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for (unsigned i = 0; i < vals.size(); i++) |
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{ |
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Trace(c) << ((pol ? vals[i].getConst<bool>() : !vals[i].getConst<bool>()) |
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? "1" |
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: "0"); |
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} |
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} |
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} |
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} // namespace quantifiers |
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} // namespace theory |
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} // namespace cvc5 |