j < 0, i < i % j, 0 ≤ i, 0 < i % j ⊦ j = 0, j ≤ i ∧ 0 < j
i < i % j, 0 ≤ i, 0 < i % j ⊦ j < 0, j = 0, j ≤ i ∧ 0 < j
Used formulas: j < 0