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/****************************************************************************** |
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* Top contributors (to current version): |
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* Andrew Reynolds, 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 debug checks for ensuring proofs are closed. |
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*/ |
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#include "expr/proof_ensure_closed.h" |
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#include <sstream> |
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#include "expr/proof_generator.h" |
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#include "expr/proof_node.h" |
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#include "expr/proof_node_algorithm.h" |
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#include "options/proof_options.h" |
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#include "options/smt_options.h" |
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namespace cvc5 { |
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/** |
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* Ensure closed with respect to assumptions, internal version, which |
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* generalizes the check for a proof generator or a proof node. |
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*/ |
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752408 |
void ensureClosedWrtInternal(Node proven, |
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ProofGenerator* pg, |
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ProofNode* pnp, |
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const std::vector<Node>& assumps, |
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const char* c, |
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const char* ctx, |
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bool reqGen) |
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{ |
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if (!options::produceProofs()) |
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{ |
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// proofs not enabled, do not do check |
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return; |
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} |
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bool isTraceDebug = Trace.isOn(c); |
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if (!options::proofEagerChecking() && !isTraceDebug) |
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{ |
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// trace is off and proof new eager checking is off, do not do check |
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return; |
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} |
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std::stringstream sdiag; |
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bool isTraceOn = Trace.isOn(c); |
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if (!isTraceOn) |
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{ |
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sdiag << ", use -t " << c << " for details"; |
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} |
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bool dumpProofTraceOn = Trace.isOn("dump-proof-error"); |
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if (!dumpProofTraceOn) |
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{ |
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sdiag << ", use -t dump-proof-error for details on proof"; |
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} |
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// get the proof node in question, which is either provided or built by the |
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// proof generator |
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std::shared_ptr<ProofNode> pn; |
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std::stringstream ss; |
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if (pnp != nullptr) |
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{ |
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Assert(pg == nullptr); |
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ss << "ProofNode in context " << ctx; |
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} |
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else |
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{ |
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ss << "ProofGenerator: " << (pg == nullptr ? "null" : pg->identify()) |
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<< " in context " << ctx; |
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if (pg == nullptr) |
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{ |
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// only failure if flag is true |
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if (reqGen) |
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{ |
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Unreachable() << "...ensureClosed: no generator in context " << ctx |
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<< sdiag.str(); |
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} |
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} |
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else |
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{ |
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Assert(!proven.isNull()); |
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pn = pg->getProofFor(proven); |
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pnp = pn.get(); |
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} |
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} |
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Trace(c) << "=== ensureClosed: " << ss.str() << std::endl; |
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Trace(c) << "Proven: " << proven << std::endl; |
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if (pnp == nullptr) |
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{ |
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if (pg == nullptr) |
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{ |
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// did not require generator |
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Assert(!reqGen); |
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Trace(c) << "...ensureClosed: no generator in context " << ctx |
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<< std::endl; |
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return; |
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} |
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} |
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// if we don't have a proof node, a generator failed |
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if (pnp == nullptr) |
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{ |
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Assert(pg != nullptr); |
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AlwaysAssert(false) << "...ensureClosed: null proof from " << ss.str() |
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<< sdiag.str(); |
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} |
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std::vector<Node> fassumps; |
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expr::getFreeAssumptions(pnp, fassumps); |
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bool isClosed = true; |
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std::stringstream ssf; |
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for (const Node& fa : fassumps) |
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{ |
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if (std::find(assumps.begin(), assumps.end(), fa) == assumps.end()) |
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{ |
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isClosed = false; |
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ssf << "- " << fa << std::endl; |
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} |
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} |
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if (!isClosed) |
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{ |
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Trace(c) << "Free assumptions:" << std::endl; |
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Trace(c) << ssf.str(); |
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if (!assumps.empty()) |
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{ |
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Trace(c) << "Expected assumptions:" << std::endl; |
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for (const Node& a : assumps) |
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{ |
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Trace(c) << "- " << a << std::endl; |
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} |
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} |
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if (dumpProofTraceOn) |
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{ |
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Trace("dump-proof-error") << " Proof: " << *pnp << std::endl; |
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} |
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} |
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AlwaysAssert(isClosed) << "...ensureClosed: open proof from " << ss.str() |
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<< sdiag.str(); |
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Trace(c) << "...ensureClosed: success" << std::endl; |
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Trace(c) << "====" << std::endl; |
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} |
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void pfgEnsureClosed(Node proven, |
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ProofGenerator* pg, |
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const char* c, |
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const char* ctx, |
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bool reqGen) |
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{ |
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Assert(!proven.isNull()); |
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// proof generator may be null |
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std::vector<Node> assumps; |
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ensureClosedWrtInternal(proven, pg, nullptr, assumps, c, ctx, reqGen); |
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} |
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void pfgEnsureClosedWrt(Node proven, |
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ProofGenerator* pg, |
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const std::vector<Node>& assumps, |
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const char* c, |
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const char* ctx, |
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bool reqGen) |
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{ |
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Assert(!proven.isNull()); |
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// proof generator may be null |
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ensureClosedWrtInternal(proven, pg, nullptr, assumps, c, ctx, reqGen); |
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} |
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void pfnEnsureClosed(ProofNode* pn, const char* c, const char* ctx) |
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{ |
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ensureClosedWrtInternal(Node::null(), nullptr, pn, {}, c, ctx, false); |
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} |
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void pfnEnsureClosedWrt(ProofNode* pn, |
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const std::vector<Node>& assumps, |
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const char* c, |
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const char* ctx) |
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{ |
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ensureClosedWrtInternal(Node::null(), nullptr, pn, assumps, c, ctx, false); |
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} |
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} // namespace cvc5 |