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/****************************************************************************** |
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* Top contributors (to current version): |
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* Diego Della Rocca de Camargos |
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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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* Implemantation of the module for printing dot proofs. |
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*/ |
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#include "proof/dot/dot_printer.h" |
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#include <sstream> |
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#include "expr/proof_checker.h" |
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#include "expr/proof_node_manager.h" |
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#include "printer/smt2/smt2_printer.h" |
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#include "theory/builtin/proof_checker.h" |
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namespace cvc5 { |
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namespace proof { |
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std::string DotPrinter::sanitizeString(const std::string& s) |
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{ |
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std::string newS; |
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newS.reserve(s.size()); |
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for (const char c : s) |
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{ |
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switch (c) |
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{ |
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case '\"': newS += "\\\""; break; |
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case '>': newS += "\\>"; break; |
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case '<': newS += "\\<"; break; |
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case '{': newS += "\\{"; break; |
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case '}': newS += "\\}"; break; |
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case '|': newS += "\\|"; break; |
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default: newS += c; break; |
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} |
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} |
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return newS; |
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} |
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void DotPrinter::print(std::ostream& out, const ProofNode* pn) |
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{ |
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uint64_t ruleID = 0; |
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// The dot attribute rankdir="BT" sets the direction of the graph layout, |
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// placing the root node at the top. The "node [shape..." attribute sets the |
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// shape of all nodes to record. |
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out << "digraph proof {\n\trankdir=\"BT\";\n\tnode [shape=record];\n"; |
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DotPrinter::printInternal(out, pn, ruleID, 0, false); |
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out << "}\n"; |
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} |
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void DotPrinter::printInternal(std::ostream& out, |
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const ProofNode* pn, |
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uint64_t& ruleID, |
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uint64_t scopeCounter, |
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bool inPropositionalView) |
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{ |
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uint64_t currentRuleID = ruleID; |
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const std::vector<std::shared_ptr<ProofNode>>& children = pn->getChildren(); |
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std::ostringstream currentArguments, resultStr, classes, colors; |
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out << "\t" << currentRuleID << " [ label = \"{"; |
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resultStr << pn->getResult(); |
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std::string astring = resultStr.str(); |
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out << sanitizeString(astring); |
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PfRule r = pn->getRule(); |
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DotPrinter::ruleArguments(currentArguments, pn); |
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astring = currentArguments.str(); |
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out << "|" << r << sanitizeString(astring) << "}\""; |
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classes << ", class = \""; |
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colors << ""; |
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// set classes and colors, based on the view that the rule belongs |
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switch (r) |
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{ |
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case PfRule::SCOPE: |
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if (scopeCounter < 1) |
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{ |
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classes << " basic"; |
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colors << ", color = blue "; |
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inPropositionalView = true; |
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} |
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scopeCounter++; |
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break; |
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case PfRule::ASSUME: |
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// a node can belong to more than one view, so these if's must not be |
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// exclusive |
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if (scopeCounter < 2) |
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{ |
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classes << " basic"; |
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colors << ", color = blue "; |
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} |
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if (inPropositionalView) |
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{ |
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classes << " propositional"; |
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colors << ", fillcolor = aquamarine4, style = filled "; |
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} |
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break; |
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case PfRule::CHAIN_RESOLUTION: |
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case PfRule::FACTORING: |
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case PfRule::REORDERING: |
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if (inPropositionalView) |
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{ |
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classes << " propositional"; |
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colors << ", fillcolor = aquamarine4, style = filled "; |
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} |
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break; |
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default: inPropositionalView = false; |
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} |
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classes << " \""; |
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out << classes.str() << colors.str(); |
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out << " ];\n"; |
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for (const std::shared_ptr<ProofNode>& c : children) |
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{ |
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++ruleID; |
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out << "\t" << ruleID << " -> " << currentRuleID << ";\n"; |
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printInternal(out, c.get(), ruleID, scopeCounter, inPropositionalView); |
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} |
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} |
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void DotPrinter::ruleArguments(std::ostringstream& currentArguments, |
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const ProofNode* pn) |
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{ |
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const std::vector<Node>& args = pn->getArguments(); |
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PfRule r = pn->getRule(); |
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// don't process arguments of rules whose conclusion is in the arguments |
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if (!args.size() || r == PfRule::ASSUME || r == PfRule::REORDERING |
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|| r == PfRule::REFL) |
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{ |
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return; |
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} |
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currentArguments << " :args [ "; |
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// if cong, special process |
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if (r == PfRule::CONG) |
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{ |
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AlwaysAssert(args.size() == 1 || args.size() == 2); |
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// if two arguments, ignore first and print second |
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if (args.size() == 2) |
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{ |
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currentArguments << args[1]; |
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} |
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else |
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{ |
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Kind k; |
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ProofRuleChecker::getKind(args[0], k); |
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currentArguments << printer::smt2::Smt2Printer::smtKindString(k); |
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} |
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} |
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// if th_rw, likewise |
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else if (r == PfRule::THEORY_REWRITE) |
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{ |
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// print the second argument |
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theory::TheoryId id; |
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theory::builtin::BuiltinProofRuleChecker::getTheoryId(args[1], id); |
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std::ostringstream ss; |
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ss << id; |
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std::string s = ss.str(); |
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// delete "THEORY_" prefix |
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s.erase(0, 7); |
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currentArguments << s; |
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} |
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else |
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{ |
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currentArguments << args[0]; |
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for (size_t i = 1, size = args.size(); i < size; i++) |
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{ |
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currentArguments << ", " << args[i]; |
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} |
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} |
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currentArguments << " ]"; |
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} |
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} // namespace proof |
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} // namespace cvc5 |