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/****************************************************************************** |
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* Top contributors (to current version): |
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* Andrew Reynolds |
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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 assertion list |
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*/ |
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#include "decision/assertion_list.h" |
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namespace cvc5 { |
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namespace decision { |
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|
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const char* toString(DecisionStatus s) |
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{ |
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switch (s) |
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{ |
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case DecisionStatus::INACTIVE: return "INACTIVE"; |
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case DecisionStatus::NO_DECISION: return "NO_DECISION"; |
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case DecisionStatus::DECISION: return "DECISION"; |
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case DecisionStatus::BACKTRACK: return "BACKTRACK"; |
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default: return "?"; |
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} |
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} |
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std::ostream& operator<<(std::ostream& out, DecisionStatus s) |
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{ |
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out << toString(s); |
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return out; |
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} |
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AssertionList::AssertionList(context::Context* ac, |
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context::Context* ic, |
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bool useDyn) |
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: d_assertions(ac), |
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d_assertionIndex(ic), |
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d_usingDynamic(useDyn), |
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d_dindex(ic) |
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{ |
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} |
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void AssertionList::presolve() |
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{ |
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Trace("jh-status") << "AssertionList::presolve" << std::endl; |
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d_assertionIndex = 0; |
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d_dlist.clear(); |
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d_dindex = 0; |
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} |
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void AssertionList::addAssertion(TNode n) { d_assertions.push_back(n); } |
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TNode AssertionList::getNextAssertion() |
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{ |
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size_t fromIndex; |
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if (d_usingDynamic) |
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{ |
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// is a dynamic assertion ready? |
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fromIndex = d_dindex.get(); |
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if (fromIndex < d_dlist.size()) |
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{ |
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d_dindex = d_dindex.get() + 1; |
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Trace("jh-status") << "Assertion " << d_dlist[fromIndex].getId() |
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<< " from dynamic list" << std::endl; |
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return d_dlist[fromIndex]; |
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} |
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} |
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// check if dynamic assertions |
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fromIndex = d_assertionIndex.get(); |
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Assert(fromIndex <= d_assertions.size()); |
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if (fromIndex == d_assertions.size()) |
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{ |
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return Node::null(); |
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} |
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// increment for the next iteration |
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d_assertionIndex = d_assertionIndex + 1; |
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Trace("jh-status") << "Assertion " << d_assertions[fromIndex].getId() |
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<< std::endl; |
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return d_assertions[fromIndex]; |
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} |
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size_t AssertionList::size() const { return d_assertions.size(); } |
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void AssertionList::notifyStatus(TNode n, DecisionStatus s) |
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{ |
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Trace("jh-status") << "Assertion status " << s << " for " << n.getId() |
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<< ", current " << d_dindex.get() << "/" << d_dlist.size() |
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<< std::endl; |
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if (!d_usingDynamic) |
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{ |
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// not using dynamic ordering, return |
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return; |
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} |
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if (s == DecisionStatus::NO_DECISION) |
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{ |
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// no decision does not impact the decision order |
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return; |
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} |
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std::unordered_set<TNode>::iterator it = d_dlistSet.find(n); |
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if (s == DecisionStatus::DECISION) |
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{ |
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if (it == d_dlistSet.end()) |
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{ |
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// if we just had a status on an assertion and it didn't occur in dlist, |
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// then our index should have exhausted dlist |
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Assert(d_dindex.get() == d_dlist.size()); |
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if (d_dindex.get() == d_dlist.size()) |
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{ |
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d_dindex = d_dindex.get() + 1; |
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} |
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// add to back of the decision list if not already there |
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d_dlist.push_back(n); |
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d_dlistSet.insert(n); |
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Trace("jh-status") << "...push due to decision" << std::endl; |
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} |
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return; |
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} |
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if (s == DecisionStatus::BACKTRACK) |
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{ |
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// backtrack inserts at the current position |
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if (it == d_dlistSet.end()) |
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{ |
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d_dlist.insert(d_dlist.begin(), n); |
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d_dlistSet.insert(n); |
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} |
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} |
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} |
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} // namespace decision |
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} // namespace cvc5 |