32768 ≤ i, 0 < i, 0 ≤ i ⊦ i2s(i) = i2s(i - 65536)
Used simplifier rules: ⊦ i ≤ j ∧ 0 < i → 0 < j; (forward)% ⊦ i ≤ j ∧ 0 ≤ i → 0 ≤ j; (forward)