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Proof step 26 from proof cast-mod-neg-low (previous step)

# int2bits(j) ≠ i→n(i) + 1, i→n(i) ≤ # int2bits(j), 0 < i, j < 0, j % 2 ^ i + 2 ^ (i - 1) < 0, j < 2 ^ (i - 1), 2 ^ (i - 1) + j < 0, 0 < j + 2 ^ i ⊦ i = 1, j = ~1, bits2int(lastn(i→n(i), int2bits(j))) = j % 2 ^ i + 2 ^ i

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 27:
0 < j + 2 ^ i, 2 ^ (i - 1) + j < 0, j < 2 ^ (i - 1), j % 2 ^ i + 2 ^ (i - 1) < 0, j < 0, 0 < i, i→n(i) ≤ # int2bits(j) ⊦ # int2bits(j) = i→n(i) + 1, bits2int(lastn(i→n(i), int2bits(j))) = j % 2 ^ i + 2 ^ i, j = ~1, i = 1

Rule argument

Additional information

Used simplifier rules: ⊦ i + j = j + i;% ⊦ i + j + i0 = (i + j) + i0;