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Proof step 3 from proof num-i2b-neg (previous step)

i < ~128, i < 0 ⊦ i2b(i) = i2b(bits2int(lastn(8, int2bits(i))))

User applied rule insert rewrite lemma

And obtained the following new goals

Rule argument

name: int2byte-out rotate: F subst: [i] → [i]

Additional information

Used simplifier rules: inbyte: ⊦ i ∈byte ↔ ~128 ≤ i ∧ i ≤ 127;% ⊦ i < j → (¬ ¬ j ≤ i ↔ false); Used terms: i