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Proof step 112 from proof byte-law-righthift-not (previous step)

i2b(bits2uint(firstn(7, true ' + false ' + false ' + false ' + false ' + false ' + false ' + false '))) = i2b(2147483392 + bits2uint(true ' + firstn(7, true ' + false ' + false ' + false ' + false ' + false ' + false ' + false '))) ⊦

User applied rule insert rewrite lemma

And obtained the following new goals

Rule argument

seq: ⊦ n ≠ 0 → firstn(n, boolvar ' + bits) = boolvar ' + firstn(n -1, bits) subst: [bits, boolvar, n] → [ false ' + false ' + false ' + false ' + false ' + false ' + false ', true, 7] rotate: F spec: list-del inst: bitlista name: firstN-rec-01

Additional information

Used terms: false ' + false ' + false ' + false ' + false ' + false ' + false ', true, 7