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Add EUF (congruence closure) proof hints and checker to the new core

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EUF proofs are checked modulo union-find.
Equalities are added to to union-find if they are assumptions or if they can be derived using congruence closure. The congruence closure assumptions are added as proof-hints.
Note that this proof format does not track equality inferences, symmetry and transitivity. Instead they are handled by assuming a union-find based checker.
This commit is contained in:
Nikolaj Bjorner 2022-09-25 14:26:20 -07:00
parent 6f2fde87d1
commit 9be8fc7857
11 changed files with 315 additions and 57 deletions
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1
src/sat/smt/q_ematch.h
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@ -96,6 +96,7 @@ namespace q {
binding* alloc_binding(clause& c, app* pat, euf::enode* const* _binding, unsigned max_generation, unsigned min_top, unsigned max_top);
ptr_vector<size_t> m_explain;
euf::cc_justification m_explain_cc;
sat::ext_justification_idx mk_justification(unsigned idx, clause& c, euf::enode* const* b);
void ensure_ground_enodes(expr* e);