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Proof step 13 from proof bytes2bytes-identity (previous step)

bytes0 = by0 + bytes, 1 + # bytes0 = # int2bytes(bytes2int(by ' + bytes0)), b2i(by) = ~1, b2i(by0) < 0 ⊦ int2bytes(bytes2int(by ' + bytes0)) = by ' + bytes0, bytes0 = []

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 14:
b2i(by) = ~1, 2 + # bytes = # int2bytes(bytes2int(by ' + by0 ' + bytes)), b2i(by0) < 0 ⊦ int2bytes(bytes2int(by ' + by0 ' + bytes)) = by ' + by0 ' + bytes

Rule argument

Additional information

Used simplifier rules: ⊦ j < i ∧ i ≤ 0 → j < 0; (forward)% ⊦ by ' + bytes ≠ [];% ⊦ (bytes + bytes0) + bytes1 = bytes + bytes0 + bytes1;% ⊦ # by ' = 0 +1;% ⊦ #(bytes + bytes0) = # bytes + # bytes0;% ⊦ by + bytes = by ' + bytes;