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

¬ # bytes ≥ n ⊦ bytes = [], n = 0, fix(n, bytes).last = bytes.last

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 5:
# bytes < n ⊦ fix(n, bytes).last = bytes.last, bytes = []

Rule argument

Additional information

Used simplifier rules: ⊦ m < n → n ≠ 0; (forward)% ⊦ m < n → n ≠ 0;% ⊦ ¬ m ≤ n ↔ n < m;% ⊦ n ≥ m ↔ m ≤ n;