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Proof step 1 from proof setShortInt-theorem (conclusion)

⊦ i ∈short → fillsgn(2, int2bytes(i)) = i2b(i i>> 8) ' + i2b(i)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 2:
i ∈short ⊦ fillsgn(2, int2bytes(i)) = i2b(i i>> 8) ' + i2b(i) '

Rule argument

Additional information

Used simplifier rules: Last: ⊦ bytes + by = bytes + by '; from specification list[bytelist]