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Proof step 8 from proof fix2rest-last (previous step)

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

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 9:
⊦ # bytes ≥ n → fix(n, bytes) = lastn(n, bytes)
Proof step 10:
# bytes ≥ 2 ⊦ bytes = [], lastn(2, bytes).rest = bytes.last ', ¬ 2 < # bytes ∧ ¬ 0 ≤ bytes2int(bytes), ¬ 2 < # bytes ∧ ¬ bytes2int(bytes) < 0

Rule argument

name: fix-longer rotate: F subst: [bytes, n] → [bytes, 2]

Additional information

Used simplifier rules: ⊦ n ≥ m ↔ m ≤ n;% ⊦ ¬ m ≤ n ↔ n < m;% ⊦ m < n → ¬ n < m;% ⊦ i ≤ j → (¬ ¬ j < i ↔ false); Used terms: bytes, 2