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Proof step 4 from proof ubyte-max-01 (previous step)

¬ ub2i(by) < 256, 0 < ub2i(by), 0 ≤ ub2i(by) ⊦

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 5:
⊦ i ≠ j -1 → (i < j ↔ i < j -1)

Rule argument

seq: ⊦ i ≠ j -1 → (i < j ↔ i < j -1) subst: [j, i] → [256, ub2i(by)] rotate: F spec: int-basic1 inst: name: ls-rec

Additional information

Used simplifier rules: ubyte-max: ⊦ ¬ 255 < ub2i(by);% ⊦ i ≤ j ∧ 0 ≤ i → 0 ≤ j; (forward)% ⊦ ¬ i < j ↔ j ≤ i;% ⊦ i ≠ j → (i ≤ j ↔ i < j); Used terms: 256, ub2i(by)