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Proof step 865 from proof bitsand-cast (previous step)

true ∈ bits1, false ∈ bits1 → bits1 = mklist(boolvar, n) + boolvar0 ' + bits ∧ sgn(mklist(boolvar, n) + boolvar0 ' + bits) = boolvar ' + boolvar0 ' + bits ∧ ¬(boolvar ↔ boolvar0) ∧ n ≠ 0 ⊦ false ∈ bits1, bits2 + bits1 = [], bits0 = [], lastn(# bits1, fillsgn(# bits1, bitsand(sgn(bits1), bits0))) = lastn(# bits1, fillsgn(# bits1, bitsand(bits2 + bits1, bits0)))

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Rule argument

Additional information