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/****************************************************************************** |
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* Top contributors (to current version): |
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* Gereon Kremer |
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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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* Implements a way to track the origins of ICP-style contractions. |
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*/ |
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#include "theory/arith/nl/icp/contraction_origins.h" |
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namespace cvc5 { |
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namespace theory { |
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namespace arith { |
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namespace nl { |
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namespace icp { |
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void ContractionOriginManager::getOrigins(ContractionOrigin const* const origin, |
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std::set<Node>& res) const |
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{ |
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if (!origin->candidate.isNull()) |
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{ |
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res.insert(origin->candidate); |
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} |
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for (const auto& co : origin->origins) |
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{ |
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getOrigins(co, res); |
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} |
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} |
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const std::map<Node, ContractionOriginManager::ContractionOrigin*>& |
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ContractionOriginManager::currentOrigins() const |
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{ |
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return d_currentOrigins; |
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} |
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void ContractionOriginManager::add(const Node& targetVariable, |
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const Node& candidate, |
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const std::vector<Node>& originVariables, |
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bool addTarget) |
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{ |
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Trace("nl-icp") << "Adding contraction for " << targetVariable << std::endl; |
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std::vector<ContractionOrigin*> origins; |
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if (addTarget) |
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{ |
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auto it = d_currentOrigins.find(targetVariable); |
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if (it != d_currentOrigins.end()) |
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{ |
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origins.emplace_back(it->second); |
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} |
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} |
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for (const auto& v : originVariables) |
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{ |
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auto it = d_currentOrigins.find(v); |
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if (it != d_currentOrigins.end()) |
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{ |
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origins.emplace_back(it->second); |
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} |
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} |
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d_allocations.emplace_back( |
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new ContractionOrigin{candidate, std::move(origins)}); |
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d_currentOrigins[targetVariable] = d_allocations.back().get(); |
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} |
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std::vector<Node> ContractionOriginManager::getOrigins( |
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const Node& variable) const |
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{ |
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Trace("nl-icp") << "Obtaining origins for " << variable << std::endl; |
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std::set<Node> origins; |
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Assert(d_currentOrigins.find(variable) != d_currentOrigins.end()) |
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<< "Using variable as origin that is unknown yet."; |
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getOrigins(d_currentOrigins.at(variable), origins); |
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Assert(!origins.empty()) << "There should be at least one origin"; |
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return std::vector<Node>(origins.begin(), origins.end()); |
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} |
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bool ContractionOriginManager::isInOrigins(const Node& variable, |
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const Node& c) const |
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{ |
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std::set<Node> origins; |
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Assert(d_currentOrigins.find(variable) != d_currentOrigins.end()) |
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<< "Using variable as origin that is unknown yet."; |
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getOrigins(d_currentOrigins.at(variable), origins); |
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return origins.find(c) != origins.end(); |
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} |
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void print(std::ostream& os, |
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const std::string& indent, |
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const ContractionOriginManager::ContractionOrigin* co) |
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{ |
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os << indent << co->candidate << std::endl; |
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for (const auto& o : co->origins) |
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{ |
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print(os, indent + "\t", o); |
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} |
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} |
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inline std::ostream& operator<<(std::ostream& os, |
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const ContractionOriginManager& com) |
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{ |
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os << "ContractionOrigins:" << std::endl; |
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const auto& origins = com.currentOrigins(); |
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for (const auto& vars : origins) |
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{ |
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os << vars.first << ":" << std::endl; |
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print(os, "\t", vars.second); |
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} |
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return os; |
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} |
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} // namespace icp |
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} // namespace nl |
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} // namespace arith |
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} // namespace theory |
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} // namespace cvc5 |