wip - updates to proof logging and self-checking

move self-checking functionality to inside sat/smt so it can be used on-line and not just off-line.

when self-validation fails, use vs, not clause, to check. It allows self-validation without checking and maintaining RUP validation.

new options sat.smt.proof.check_rup, sat.smt.proof.check for online validation.

z3 sat.smt.proof.check=true sat.euf=true /v:1 sat.smt.proof.check_rup=true /st file.smt2 sat.smt.proof=p.smt2

src/model/model.h

@@ -94,6 +94,8 @@ public:
 
     void compress(bool force_inline = false);
 
+    void evaluate_constants();
+
     void set_model_completion(bool f) { m_mev.set_model_completion(f); }
     void updt_params(params_ref const & p);