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Proof step 77 from proof bits2int-pos (previous step)

# bits0 ≤ 7 ⊦ ¬ bits2int(boolvar ' + bits0) < ~128, 0 ≤ b2i(i2b(bits2int(boolvar ' + bits0))) ↔ ¬ boolvar

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 78:
bits2int(boolvar ' + bits0) < ~128, # bits0 ≤ 7, bits2int(boolvar ' + bits0) < 0 ⊦ 0 ≤ b2i(i2b(bits2int(boolvar ' + bits0))) ↔ ¬ boolvar

Rule argument

Additional information

Used simplifier rules: ⊦ i < (* j) ∧ j < 0 → i < 0; (forward)