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Proof step 2 from proof int2bytes-len-ls-neg (previous step)

i < 0 ⊦ int2bytes(i).first = i2b(~1), n < # int2bytes(i) ↔ ¬ 0 ≤ i + 2 ^ (8 * n→i(n))

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 3:
⊦ ¬ m < n ↔ n ≤ m
Proof step 4:
i < 0 ⊦ int2bytes(i).first = i2b(~1), ¬ # int2bytes(i) ≤ n ↔ ¬ 0 ≤ i + 2 ^ (8 * n→i(n))

Rule argument

seq: ⊦ ¬ m < n ↔ n ≤ m subst: [n, m] → [# int2bytes(i), n] rotate: F spec: nat inst: name: lels

Additional information

Used terms: # int2bytes(i), n