~32768 ≤ i, ~32768 ≤ i % 65536, i < 0 ⊦ i = i % 65536
Used simplifier rules: ⊦ j ≤ i ∧ i < 0 → j < 0; (forward)% ⊦ i < 0 ∧ 0 ≤ j → i ≤ j;