| i0 % j < 0, i + i0 % j < 0, i + i0 < 0, 0 < j, i0 < 0, 0 ≤ i ⊦ (i + i0) % j = (0 ≤ i + i0 % j ∧ (i + i0) % j ≠ 0 ⊃ (i + i0) % j + j;(i + i0) % j) |
Used simplifier rules: ⊦ i = i + j ↔ j = 0; (s)%add-a: ⊦ i + j + i0 = (i + j) + i0; from specification int-basic2%add-c: ⊦ i + j = j + i; from specification int-basic2% ⊦ i < j → (j ≤ i ↔ false); (as)