us2i(sho) = i * 256 + j, 256 ≤ i, 0 < i, 0 ≤ i, 0 ≤ j ⊦
Used simplifier rules: ⊦ i ≤ j ∧ 0 < i → 0 < j; (forward)% ⊦ i ≤ j ∧ 0 ≤ i → 0 ≤ j; (forward)