wip - dependent expr simpliifer

- simplify iterator over current indices
- add more simplifiers used by asserted_formulas
- improve diagnostics printing

src/ast/simplifiers/eliminate_predicates.h

@@ -109,6 +109,7 @@ private:
     void insert_macro(app* head, expr* def, expr_dependency* dep);
     expr_ref bind_free_variables_in_def(clause& cl, app* head, expr* def);
     bool can_be_macro_head(expr* head, unsigned num_bound);
+    bool can_be_quasi_macro_head(expr* head, unsigned num_bound);
     bool is_macro_safe(expr* e);
     void try_find_macro(clause& cl);
 
@@ -145,4 +146,4 @@ public:
 
 inline std::ostream& operator<<(std::ostream& out, eliminate_predicates::clause const& c) {
     return c.display(out);
-}
+}