Section tbled.
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.

Lemma APPLY_sound_writable_Ews: rtac_sound (APPLY typ func writable_Ews_lemma).