| 0 ≤ i ⊦ i = 0, gcd(i, i0 + i) = gcd(i0 + i, i0), 0 < i ∧ i < i0 + i |
0 < i ⊦ i = 0, gcd(i, i0 + i) = gcd(i0 + i, i0), i < i0 + i
Used simplifier rules: forward-le-05: ⊦ i < j ∧ 0 ≤ i → 0 < j; (forward) from specification int-abs%lels-02: ⊦ i ≠ j → (i ≤ j ↔ i < j); from specification int-abs