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Proof step 5 from proof int2bytes-zero (previous step)

int2bytes(i) = i2b(0) ', i ≤ 255 ⊦ i = 0

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 6:
127 < i, i ≤ 255 ⊦ int2bytes(i) = i2b(0) ' + i2b(i - 256) '
Proof step 7:
¬(127 < i ∧ i ≤ 255), int2bytes(i) = i2b(0) ', i ≤ 255 ⊦ i = 0

Rule argument

name: int2bytes-le255 rotate: F subst: [i] → [i]

Additional information

Used simplifier rules: ⊦ by ' = by0 ' + bytes ↔ by = by0 ∧ bytes = [];% ⊦ by ' ≠ [];% ⊦ (bytes + bytes0) + bytes1 = bytes + bytes0 + bytes1; Used terms: i