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Proof step 58 from proof rightshift-8-02 (previous step)

~(2 ^ (abs(8) - 1)) ≤ i ∧ i < 0, # int2bytes(i) = 1, i < 0 ⊦ ~1 = bytes2int((i2b(~1) ' + int2bytes(i)).butlast)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 59:
# int2bytes(i) = 1, i < 0, ~128 ≤ i ⊦ ~1 = bytes2int((i2b(~1) ' + int2bytes(i)).butlast)

Rule argument

Additional information

Used simplifier rules: ⊦ i ≤ j ∧ j < j0 → i < j0; (forward)