wip - proof checking, add support for distinct, other fixes

src/sat/smt/distinct_theory_checker.h

@@ -0,0 +1,50 @@
+/*++
+Copyright (c) 2022 Microsoft Corporation
+
+Module Name:
+
+    distinct_proof_checker.h
+
+Abstract:
+
+    Plugin for checking distinct internalization
+
+Author:
+
+    Nikolaj Bjorner (nbjorner) 2022-10-07
+
+Note:
+ 
+  First version just trusts that distinct is internalized correctly.
+
+
+--*/
+#pragma once
+
+#include "sat/smt/euf_proof_checker.h"
+#include <iostream>
+
+namespace distinct {
+
+    class theory_checker : public euf::theory_checker_plugin {
+        ast_manager& m;
+    public:
+        theory_checker(ast_manager& m): 
+            m(m) {
+        }
+
+        expr_ref_vector clause(app* jst) override { 
+            expr_ref_vector result(m); 
+            result.append(jst->get_num_args(), jst->get_args()); 
+            return result; 
+        }
+        
+        bool check(app* jst) override { return true; }
+
+        void register_plugins(euf::theory_checker& pc) override {
+            pc.register_plugin(symbol("distinct"), this);
+        }
+        
+    };
+
+}