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Proof step 712 from proof bitsand-cast (previous step)

# bits1 = # bitsand(bits1, false ' + true ' + bits), 2 + # bits = # bits1 ⊦ bits3 = [], mklist(false, # bits3) + bitsand(bits1, false ' + true ' + bits) = lastn(2 + # bits + # bits3, fillsgn(2 + # bits + # bits3, mklist(false, # bits3) + bitsand(false ' + true ' + bits, bits1))), bits1 = [], bits2 + mklist(false, # bits3) = [], bits3 + bits1 = [], bits3.first

User applied rule insert rewrite lemma

And obtained the following new goals

Rule argument

seq: ⊦ n ≤ # bits → fillsgn(n, bits) = bits subst: [bits, n] → [ mklist(false, # bits3) + bitsand(false ' + true ' + bits, bits1), 2 + # bits + # bits3] rotate: F spec: bitopsaux inst: name: fillsgn-longer

Additional information

Used terms: mklist(false, # bits3) + bitsand(false ' + true ' + bits, bits1), 2 + # bits + # bits3