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Proof step 4 from proof no-leading-zero-02 (previous step)

⊦ by = i2b(0), by = i2b(~1), int2bytes(bytes2int(by ' + bytes0)) = by ' + bytes0

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 5:
bytes ≠ [], b2i(bytes.first) ≠ 0, b2i(bytes.first) ≠ ~1 ⊦ int2bytes(bytes2int(bytes)) = bytes

Rule argument

name: bytes2bytes-other rotate: F subst: [bytes] → [by ' + bytes0]

Additional information

Used simplifier rules: ⊦ ¬ bytes + bytes0 ≠ [] ↔ bytes = [] ∧ bytes0 = [];% ⊦ by ' ≠ [];% ⊦ (bytes + bytes0) + bytes1 = bytes + bytes0 + bytes1;% ⊦ (by ' + bytes).first = by;% ⊦ b2i(by) = i → (i2b(i) ≠ by ↔ false); Used terms: by ' + bytes0