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Ubdd/level

Ubdd/level-p

Recognizer for ubdd/level structures.

Signature
(ubdd/level-p x) → *

Definitions and Theorems

Function: ubdd/level-p

(defun ubdd/level-p (x)
  (declare (xargs :guard t))
  (let ((__function__ 'ubdd/level-p))
    (declare (ignorable __function__))
    (and (consp x)
         (b* ((ubdd (car x)) (level (cdr x)))
           (and (acl2::ubddp ubdd)
                (natp level))))))

Theorem: consp-when-ubdd/level-p

(defthm consp-when-ubdd/level-p
  (implies (ubdd/level-p x) (consp x))
  :rule-classes :compound-recognizer)