0 ≤ i, 0 ≤ i0 ⊦ ≡mod(i, i0, j) ↔ i |%| j = i0 |%| j, j = 0
Used simplifier rules: forward-le-01: ⊦ i ≤ j ∧ 0 ≤ i → 0 ≤ j; (forward) from specification int-abs