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Proof step 1 from proof int2unit-inv-rest (conclusion)

⊦ 0 < i → bits2uint(bitsinvert(int2bits(i).rest)) = 2 ^ (n→i(# uint2bits(i)) - 1) - i + 1

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 2:
0 < i ⊦ 2 ^ (n→i(# uint2bits(i)) - 1) = bits2uint(bitsinvert(int2bits(i).rest)) + i + 1

Rule argument

Additional information

Used simplifier rules: ⊦ i - j = i0 ↔ i = i0 + j;