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Proof step 13 from proof and-notempty (previous step)

¬(bits0 ≠ [] ∧ bits = true '), bitsand(bits, bits0) = [] ⊦ bits = [], bits0 = [], bits0 = true ', bits0 = false ', bits ≠ bits.first ' ∧ bits0 ≠ bits0.first '

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 14:
bitsand(bits, bits0) = [] ⊦ bits = [], bits0 = [], bits0 = true ', bits0 = false ', bits = true ', bits ≠ bits.first ' ∧ bits0 ≠ bits0.first '

Proof step 13 from proof and-notempty (previous step)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Rule argument

Additional information