i0 ^ j < i ^ j, i ≤ i0, 0 ≤ j, 0 ≤ i, 0 ≤ i0 ⊦
Used simplifier rules: forward-le-01: ⊦ i ≤ j ∧ 0 ≤ i → 0 ≤ j; (forward) from specification int-abs