| abs(i) = j + 1 ⊦ i = 0, 0 ≤ j |
Used simplifier rules: le-def: ⊦ i ≤ j ↔ ¬ j < i;%abs-succ: ⊦ i < 0 → (i + 1 = abs(j) ↔ i = ~1 ∧ j = 0);%add-c: ⊦ i + j = j + i; from specification int-basic2%add-a: ⊦ i + j + i0 = (i + j) + i0; from specification int-basic2