(proof-new) Update Theory interface for proof-new (#4648)

This includes 4 changes:

Theory constructor takes a ProofNodeManager,
Theory::explain returns a TrustNode (of kind PROP_EXP),
Theory::expandDefinitions returns a TrustNode (of kind REWRITE),
Theory::ppRewrite returns a TrustNode (of kind REWRITE).
These are all currently planned updates to the interface of Theory.
This PR also connects some of the existing proof rule checkers into the proof checker, if one is provided to the constructor. It updates TheoryEngine and other places to process TrustNode in trivial ways (converting them into Node). These calls will later be updated as needed for proof support.

This PR is also contingent on the performance tests for proof-new on SMT-LIB.

1 files changed, 4 insertions, 3 deletions

diff --git a/src/theory/sets/theory_sets.h b/src/theory/sets/theory_sets.h
index 2fd1c2145..e81412ba9 100644
--- a/src/theory/sets/theory_sets.h
+++ b/src/theory/sets/theory_sets.h
@@ -39,7 +39,8 @@ class TheorySets : public Theory
              context::UserContext* u,
              OutputChannel& out,
              Valuation valuation,
-             const LogicInfo& logicInfo);
+             const LogicInfo& logicInfo,
+             ProofNodeManager* pnm);
   ~TheorySets() override;
 
   TheoryRewriter* getTheoryRewriter() override;
@@ -50,12 +51,12 @@ class TheorySets : public Theory
   void check(Effort) override;
   bool collectModelInfo(TheoryModel* m) override;
   void computeCareGraph() override;
-  Node explain(TNode) override;
+  TrustNode explain(TNode) override;
   EqualityStatus getEqualityStatus(TNode a, TNode b) override;
   Node getModelValue(TNode) override;
   std::string identify() const override { return "THEORY_SETS"; }
   void preRegisterTerm(TNode node) override;
-  Node expandDefinition(Node n) override;
+  TrustNode expandDefinition(Node n) override;
   PPAssertStatus ppAssert(TNode in, SubstitutionMap& outSubstitutions) override;
   void presolve() override;
   void propagate(Effort) override;