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Proof step 5 from proof bib-neg-high (previous step)

i ≤ ~256, ~128 ≤ i % 256, i < 0 ⊦ b2i(i2b(i)) = i % 256

User applied rule insert rewrite lemma

And obtained the following new goals

Rule argument

spec: byte inst: name: num-i2b-neg seq: i < ~128 ⊦ i2b((* i)) = i2b(bits2int(lastn(8, int2bits(i)))) subst: [i] → [i] flags: rewrite, current

Additional information

Used simplifier rules: numlsledel: j0 ≠ 0, j < j0 ⊦ i ≤ (* j) → i < (* j0); from specification int-abs Used terms: i