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Proof step 27 from proof fix2rest-last (previous step)

2 - # bytes ≠ 0, # bytes ≤ 2, 0 ≤ bytes2int(bytes) ⊦ bytes = [], mklist(i2b(0), (2 - # bytes)-1) + bytes = bytes.last '

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 28:
# bytes < 2, 0 ≤ bytes2int(bytes) ⊦ 2 = # bytes, mklist(i2b(0), 2 - # bytes - 1) + bytes = bytes.last ', bytes = []

Rule argument

Additional information

Used simplifier rules: ⊦ m < n → n ≠ 0; (forward)% ⊦ m ≠ n → (m ≤ n ↔ m < n);% ⊦ m ≤ n → (n - m = 0 ↔ n = m);% ⊦ n -1 = n - 1;