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Proof step 4 from proof notneg-01 (previous step)

i ^ j = 0, i ^ j < i, 0 < i, 0 ≤ j, i ^ j ≤ j, i ^ j ≤ 0 ⊦

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 5:
i ^ j = 0, 0 < i, 0 ≤ j ⊦

Rule argument

Additional information

Used simplifier rules: forward-lele: ⊦ j ≤ j0 ∧ j0 ≤ j1 → j ≤ j1; (forward) from specification int-abs%forward-lels: ⊦ i ≤ j ∧ j < j0 → i < j0; (forward) from specification int-abs%numlef-01: ⊦ (* i) ≤ j → i - 1 < j; (forward) from specification int-abs