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Proof step 76 from proof bits2int-pos (previous step)

# bits0 ≤ 7 ⊦ 0 ≤ b2i(i2b(bits2int(boolvar ' + bits0))) ↔ ¬ boolvar, ¬ bits2int(boolvar ' + bits0) < ~128 ∧ ¬ 127 < bits2int(boolvar ' + bits0)

User applied rule case distinction

And obtained the following new goals

Proof step 77:
# bits0 ≤ 7 ⊦ ¬ bits2int(boolvar ' + bits0) < ~128, 0 ≤ b2i(i2b(bits2int(boolvar ' + bits0))) ↔ ¬ boolvar
Proof step 80:
# bits0 ≤ 7 ⊦ ¬ 127 < bits2int(boolvar ' + bits0), 0 ≤ b2i(i2b(bits2int(boolvar ' + bits0))) ↔ ¬ boolvar

Rule argument

pos: right 2

Additional information