0 < j, abs(i % j) < j, i % j < i0, i0 < 0, i0 + j ≤ 1 ⊦
0 < j, abs(i % j) < j, i % j < i0, i0 + j ≤ 1 ⊦ i0 < 0
Used formulas: i0 < 0