Section tbled.
Variable n : nat.
Variable tbl : SymEnv.functions RType_typ.
Let RSym_sym := RSym_sym tbl.
Existing Instance RSym_sym.
Let Expr_expr_fs := Expr_expr_fs tbl.
Existing Instance Expr_expr_fs.
Let Expr_ok_fs := Expr_ok_fs tbl.
Existing Instance Expr_ok_fs.
Let ExprVar_expr := @ExprVariables.ExprVar_expr typ func.
Existing Instance ExprVar_expr.
Existing Instance MA.
Existing Instance rtac_base.MentionsAnyOk.
intros.
destruct e; auto. simpl.
repeat
match goal with
| [ |- context [match ?e with _ => _ end] ] => destruct e; auto
end.
admit.
Admitted.
(* Qed. (* :( *) *)

Lemma SYMEXE_STEP_sound: forall Struct_env, rtac_sound (SYMEXE_STEP tbl Struct_env).