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Proof step 2 from proof fix2rest-last (previous step)

⊦ bytes = [], fix(2, bytes).rest = bytes.last '

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 3:
⊦ # bytes ≤ n ∧ bytes2int(bytes) < 0 → fix(n, bytes) = mklist(i2b(~1), n - # bytes) + bytes
Proof step 4:
¬(# bytes ≤ 2 ∧ bytes2int(bytes) < 0) ⊦ bytes = [], fix(2, bytes).rest = bytes.last '
Proof step 29:
# bytes ≤ 2 ∧ bytes2int(bytes) < 0 ⊦ bytes = [], (mklist(i2b(~1), 2 - # bytes) + bytes).rest = bytes.last '

Rule argument

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

Additional information

Used terms: bytes, 2