wip - adding proof checkers, fixes to quantifier proof certificates

src/sat/smt/tseitin_proof_checker.h

@@ -0,0 +1,50 @@
+/*++
+Copyright (c) 2022 Microsoft Corporation
+
+Module Name:
+
+    tseitin_proof_checker.h
+
+Abstract:
+
+    Plugin for checking quantifier instantiations
+
+Author:
+
+    Nikolaj Bjorner (nbjorner) 2022-10-07
+
+
+--*/
+#pragma once
+
+#include "util/obj_pair_set.h"
+#include "ast/ast_trail.h"
+#include "ast/ast_util.h"
+#include "sat/smt/euf_proof_checker.h"
+#include <iostream>
+
+namespace tseitin {
+
+    class proof_checker : public euf::proof_checker_plugin {
+        ast_manager& m;
+
+        bool equiv(expr* a, expr* b);
+        
+    public:
+        proof_checker(ast_manager& m): 
+            m(m) {
+        }
+
+        ~proof_checker() override {}
+        
+        expr_ref_vector clause(app* jst) override;
+        
+        bool check(app* jst) override;
+
+        void register_plugins(euf::proof_checker& pc) override {
+            pc.register_plugin(symbol("tseitin"), this);
+        }
+        
+    };
+
+}