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Proof step 77 from proof byte-law-righthift-not (previous step)

# int2bits(128) ≤ 32 ∧ int2bits(128) ≠ [], i2b(bits2uint(firstn(31, mklist(int2bits(128).first, 32 - # int2bits(128)) + int2bits(128)))) = i2b(bits2uint(firstn(31, fillsgn(32, int2bits(~128))))), # int2bits(128) ≤ 32, # int2bits(~128) ≤ 32 ⊦

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Rule argument

Additional information

Used simplifier rules: ⊦ int2bits(j) ≠ [];% ⊦ int2bits(j).first ↔ j < 0;