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Proof step 73 from proof int2bits-rec-2pot-neg-02 (previous step)

sgn(bitsinvert(uint2bits(~(j / 2 ^ i)))) = sgn(bitsinvert(uint2bits(1 - j / 2 ^ i)) +1), j / 2 ^ i < i, j / 2 ^ i ≤ 0, 0 < i, j + 2 ^ i ≤ 0, j + 2 ^ i < i, j < 0, 0 ≤ i, true ∈ fillsgn(i→n(i) + 1, uint2bits(~(j % 2 ^ i))).rest, false ∈ uint2bits(~(j / 2 ^ i)), true ∈ uint2bits(~(j / 2 ^ i)), j % 2 ^ i < 0 ⊦ bitsinvert(uint2bits(1 - j / 2 ^ i)) +1 = [], j % 2 ^ i = 0, fillsgn(i→n(i) + 1, bitsinvert(uint2bits(~(j % 2 ^ i)))).rest +1 = fillsgn(i→n(i) + 1, sgn(bitsinvert(uint2bits(~(j % 2 ^ i))) +1)).rest, fillsgn(i→n(i) + 1, uint2bits(~(j % 2 ^ i))) = []

User applied rule insert rewrite lemma

And obtained the following new goals

Rule argument

seq: ⊦ false ∈ bits.rest ∧ bits ≠ [] → bits.rest +1 = bits +1.rest subst: [bits] → [fillsgn(i→n(i) + 1, bitsinvert(uint2bits(~(j % 2 ^ i))))] rotate: F spec: bitopsaux inst: name: succ-rest

Additional information

Used terms: fillsgn(i→n(i) + 1, bitsinvert(uint2bits(~(j % 2 ^ i))))