⊦ 0 < i ∧ 0 < j → i + j ≠ 0
¬(0 < us2i(sho) ∧ 0 < 65536 * i), us2i(sho) + 65536 * i = 0 ⊦ i = 0 ∧ s2i(sho) = 0
Used terms: 65536 * i, us2i(sho)