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Proof step 4 from proof fix-two-03 (previous step)

fix(2, bytes) = by ' + bytes0, by ∈ fix(2, bytes) ⊦ bytes0 ≠ [], bytes0.butlast = []

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 5:
fix(2, bytes) = by ', by ∈ fix(2, bytes) ⊦ [].butlast = []

Rule argument

Additional information

Used simplifier rules: ⊦ (bytes + bytes0) + bytes1 = bytes + bytes0 + bytes1;% ⊦ bytes + [] = bytes;