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Proof step 7 from proof sgn-true (previous step)

⊦ sgn(mklist(true, # bits)) = true ', bits = []

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 8:
⊦ n ≠ 0 → sgn(mklist(boolvar, n)) = boolvar '

Rule argument

name: sgn-mklist-03 rotate: F subst: [n, boolvar] → [# bits, true]

Additional information

Used simplifier rules: ⊦ # bits = 0 ↔ bits = []; Used terms: # bits, true