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Proof step 4 from proof fix2rest-last (previous step)

¬(# bytes ≤ 2 ∧ bytes2int(bytes) < 0) ⊦ bytes = [], fix(2, bytes).rest = bytes.last '

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 5:
⊦ bytes = [], fix(2, bytes).rest = bytes.last ', ¬ 2 < # bytes ∧ ¬ 0 ≤ bytes2int(bytes)

Rule argument

Additional information

Used simplifier rules: ⊦ ¬ i < j ↔ j ≤ i;% ⊦ ¬ m ≤ n ↔ n < m;