Removes old proof code (#4964)

This deletes much of the old proof code. Basically everything but the minimal necessary infra-structure for producing unsat cores. That includes dependency tracking in preprocessing, the prop engine proof and the unsat core computation code in the old proof manager. These should also go once we fully integrate into master the new proof infrastructure.

It also cleans interfaces that were using old-proof-code-specific constructs (such as LemmaProofRecipe). When possible or when it made sense standalone local proof production code was kept, but deactivated (such is in the equality engine and in the arithmetic solver).

1 files changed, 5 insertions, 15 deletions

diff --git a/src/prop/theory_proxy.cpp b/src/prop/theory_proxy.cpp
index 41da4546e..d0ba4ca71 100644
--- a/src/prop/theory_proxy.cpp
+++ b/src/prop/theory_proxy.cpp
@@ -76,22 +76,12 @@ void TheoryProxy::explainPropagation(SatLiteral l, SatClause& explanation) {
   TNode lNode = d_cnfStream->getNode(l);
   Debug("prop-explain") << "explainPropagation(" << lNode << ")" << std::endl;
 
-  LemmaProofRecipe* proofRecipe = NULL;
-  PROOF(proofRecipe = new LemmaProofRecipe;);
+  Node theoryExplanation = d_theoryEngine->getExplanation(lNode);
 
-  Node theoryExplanation = d_theoryEngine->getExplanationAndRecipe(lNode, proofRecipe);
-
-  PROOF({
-      ProofManager::getCnfProof()->pushCurrentAssertion(theoryExplanation);
-      ProofManager::getCnfProof()->setProofRecipe(proofRecipe);
-
-      Debug("pf::sat") << "TheoryProxy::explainPropagation: setting lemma recipe to: "
-                       << std::endl;
-      proofRecipe->dump("pf::sat");
-
-      delete proofRecipe;
-      proofRecipe = NULL;
-    });
+  if (options::unsatCores())
+  {
+    ProofManager::getCnfProof()->pushCurrentAssertion(theoryExplanation);
+  }
 
   Debug("prop-explain") << "explainPropagation() => " << theoryExplanation << std::endl;
   if (theoryExplanation.getKind() == kind::AND) {