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Proof step 10 from proof sgn-lastn (previous step)

(¬ boolvar) ∈ bits ⊦ lastn(# bits0 + 1, (sgn(bits) + boolvar ') + bits0) = boolvar ' + bits0

User applied rule insert rewrite lemma

And obtained the following new goals

Rule argument

seq: ⊦ (bits + bits0) + bits1 = bits + bits0 + bits1 subst: [bits1, bits0, bits] → [bits0, boolvar ', sgn(bits)] rotate: F spec: list inst: bitlista name: a

Additional information

Used terms: bits0, boolvar ', sgn(bits)