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Proof step 65 from proof byte-law-righthift-not (previous step)

i2b(bits2int(sublist(0, # fillsgn(32, int2bits(128)), false ' + fillsgn(32, int2bits(128))))) = i2b(bits2uint(firstn(31, restn(0, fillsgn(32, int2bits(~128)))))), # int2bits(~128) ≤ 32 ⊦

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Rule argument

Additional information

Used simplifier rules: ⊦ restn(0, bits) = bits;