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Proof step 43 from proof int2bytes-rec255-neg (previous step)

1 = # bytes, int2bytes(i % 256) = by ' + bytes, i < ~128, i < 0 ⊦ bytes = [], bytes = (by ' + bytes).last '

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 44:
1 = # bytes, int2bytes(i % 256) = by ' + bytes, i < ~128, i < 0 ⊦ bytes = [], bytes = bytes.last '

Rule argument

Additional information

Used simplifier rules: ⊦ (bytes + bytes0) + bytes1 = bytes + bytes0 + bytes1;% ⊦ bytes ≠ [] → (by ' + bytes).last = bytes.last;