0 ≤ i, 0 ≤ j, 2 ^ i ≤ j, # uint2bits(j) ≤ i→n(i) + 1 ⊦
Used simplifier rules: ⊦ ¬ m < n ↔ n ≤ m;% ⊦ i + j = j + i;% ⊦ i + j + i0 = (i + j) + i0;% ⊦ 0 ≤ i → i→n(i + 1) = i→n(i) + 1;