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Proof step 5 from proof fix2rest-last (previous step)

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

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 6:
⊦ # bytes ≤ n ∧ 0 ≤ bytes2int(bytes) → fix(n, bytes) = mklist(i2b(0), n - # bytes) + bytes
Proof step 7:
¬(# bytes ≤ 2 ∧ 0 ≤ bytes2int(bytes)) ⊦ bytes = [], fix(2, bytes).rest = bytes.last ', ¬ 2 < # bytes ∧ ¬ 0 ≤ bytes2int(bytes)
Proof step 18:
# bytes ≤ 2 ∧ 0 ≤ bytes2int(bytes) ⊦ bytes = [], (mklist(i2b(0), 2 - # bytes) + bytes).rest = bytes.last ', ¬ 2 < # bytes ∧ ¬ 0 ≤ bytes2int(bytes)

Rule argument

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

Additional information

Used terms: bytes, 2