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Proof step 10 from proof bib-pos-low (previous step)

i % 256 ≤ 127, i % 256 < i, 127 < i, 0 < i ⊦ b2i(i2b(bits2int(lastn(8, int2bits(i))))) = i % 256, 0 = i, ¬ # int2bits(i) < 8 ∧ ¬ lastn(8, int2bits(i)).first

User applied rule insert rewrite lemma

And obtained the following new goals

Rule argument

seq: ⊦ 0 < i → (# int2bits(i) < m ↔ i < 2 ^ (n→i(m) - 2)) subst: [m, i] → [8, i] rotate: F spec: int2bits inst: name: int2bits-lslen

Additional information

Used terms: 8, i