i0 < i, 0 < j, j1 < j, j0 < j, 0 ≤ j1, 0 ≤ j0, i * j + j0 ≤ i0 * j + j1 ⊦
Used simplifier rules: ⊦ i < j ↔ ¬ j ≤ i; (ss)% ⊦ i > j ↔ j < i; (s)