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Proof step 5 from proof int2bytes-rec-shift (previous step)

i < ~128 ∨ 128 ≤ i ⊦ int2bytes(i >> 8) = int2bytes(i).butlast

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 6:
⊦ i < ~128 ∨ 128 ≤ i → int2bytes(i).butlast = int2bytes(i >> 8)

Rule argument

name: int2bytes-butlast rotate: F subst: [i] → [i]

Additional information

Used simplifier rules: ⊦ ¬ i < j ↔ j ≤ i;% ⊦ ¬ i ≤ j ↔ j < i;% ⊦ i ≤ j → (¬ ¬ j < i ↔ false);% ⊦ i < j → (¬ ¬ j ≤ i ↔ false); Used terms: i