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Proof step 26 from proof bytes2bytes-identity (previous step)

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

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 27:
b2i(by) = 0, 2 + # bytes = # int2bytes(bytes2int(by ' + by0 ' + bytes)), 0 ≤ b2i(by0) ⊦ int2bytes(bytes2int(by ' + by0 ' + bytes)) = by ' + by0 ' + bytes

Rule argument

Additional information

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