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Proof step 17 from proof int2bits-lslen-08 (previous step)

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

User applied rule insert equation

And obtained the following new goals

Proof step 18:
0 = 2 ^ i * 2 + ~(2 ^ i * 2), 0 ≤ i, ~(2 ^ i * 2) + 2 ^ i < 0, ~(2 ^ i * 2) < 0, i→n(i + 2) + 1 < # int2bits(~(2 ^ i * 2) - 1) ⊦

Rule argument

pos: left 1 flags: discard

Additional information