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Proof step 32 from proof fillsgn-butlast (previous step)

b2i(bytes0.first) < 0, # bytes0 < n, 0 ≤ bytes2int(bytes0) ⊦ fillsgn(n, bytes0) = mklist(i2b(~1), 1 + (n - # bytes0 + 1)) + bytes0, bytes0 = []

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 33:
⊦ 0 ≤ bytes2int(bytes) ↔ bytes = [] ∨ 0 ≤ b2i(bytes.first)

Rule argument

name: bytes2int-pos rotate: F subst: [bytes] → [bytes0]

Additional information

Used simplifier rules: ⊦ i < j → (¬ ¬ j ≤ i ↔ false); Used terms: bytes0