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Proof step 9 from proof rightshift-zero (previous step)

i0 >> 0 = i0 ⊦ i0 -1 >> 0 = i0 -1

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 10:
i0 >> 0 = i0 ⊦ i0 = ((i0 - 1) >> 0) + 1

Rule argument

Additional information

Used simplifier rules: ⊦ i - j = i0 ↔ i = i0 + j;% ⊦ i -1 = i - 1;