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Proof step 17 from proof sgn-lastn-01 (previous step)

n ≤ # sgn(boolvar ' + bits), 2 + # bits ≤ n, 2 + # bits ≤ # sgn(boolvar ' + bits), ∀ n0. ¬ # sgn(boolvar ' + bits) < n0 → lastn(n0, sgn(boolvar ' + bits)) = lastn(n0, boolvar ' + bits) ⊦ lastn(n, sgn(boolvar ' + bits)) = lastn(n, boolvar ' + boolvar ' + bits)

User applied rule insert rewrite lemma

And obtained the following new goals

Rule argument

name: sgn-length-02 rotate: F subst: [boolvar, bits] → [boolvar, bits]

Additional information

Used simplifier rules: ⊦ m + n = n + m; Used terms: boolvar, bits