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Proof step 2 from proof byte-nls (previous step)

b2i(by) < ~128, b2i(by) < 0 ⊦

User applied rule insert lemma

And obtained the following new goals

Proof step 3:
⊦ ~128 ≤ b2i(by) ∧ b2i(by) ≤ 127

Rule argument

name: byte-range subst: [by] → [by]

Additional information

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