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Stmt

Stmt-equiv

Basic equivalence relation for stmt structures.

Definitions and Theorems

Function: stmt-equiv$inline

(defun stmt-equiv$inline (acl2::x acl2::y)
  (declare (xargs :guard (and (stmtp acl2::x) (stmtp acl2::y))))
  (equal (stmt-fix acl2::x)
         (stmt-fix acl2::y)))

Theorem: stmt-equiv-is-an-equivalence

(defthm stmt-equiv-is-an-equivalence
  (and (booleanp (stmt-equiv x y))
       (stmt-equiv x x)
       (implies (stmt-equiv x y)
                (stmt-equiv y x))
       (implies (and (stmt-equiv x y) (stmt-equiv y z))
                (stmt-equiv x z)))
  :rule-classes (:equivalence))

Theorem: stmt-equiv-implies-equal-stmt-fix-1

(defthm stmt-equiv-implies-equal-stmt-fix-1
  (implies (stmt-equiv acl2::x x-equiv)
           (equal (stmt-fix acl2::x)
                  (stmt-fix x-equiv)))
  :rule-classes (:congruence))

Theorem: stmt-fix-under-stmt-equiv

(defthm stmt-fix-under-stmt-equiv
  (stmt-equiv (stmt-fix acl2::x) acl2::x)
  :rule-classes (:rewrite :rewrite-quoted-constant))

Theorem: equal-of-stmt-fix-1-forward-to-stmt-equiv

(defthm equal-of-stmt-fix-1-forward-to-stmt-equiv
  (implies (equal (stmt-fix acl2::x) acl2::y)
           (stmt-equiv acl2::x acl2::y))
  :rule-classes :forward-chaining)

Theorem: equal-of-stmt-fix-2-forward-to-stmt-equiv

(defthm equal-of-stmt-fix-2-forward-to-stmt-equiv
  (implies (equal acl2::x (stmt-fix acl2::y))
           (stmt-equiv acl2::x acl2::y))
  :rule-classes :forward-chaining)

Theorem: stmt-equiv-of-stmt-fix-1-forward

(defthm stmt-equiv-of-stmt-fix-1-forward
  (implies (stmt-equiv (stmt-fix acl2::x) acl2::y)
           (stmt-equiv acl2::x acl2::y))
  :rule-classes :forward-chaining)

Theorem: stmt-equiv-of-stmt-fix-2-forward

(defthm stmt-equiv-of-stmt-fix-2-forward
  (implies (stmt-equiv acl2::x (stmt-fix acl2::y))
           (stmt-equiv acl2::x acl2::y))
  :rule-classes :forward-chaining)