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Proof step 592 from proof bitsand-cast (previous step)

false ' + true ' + bits ≠ [] ∧ bits3 + bits1 ≠ [], # bits1 = 2 + # bits ⊦ bits3 + bits1 = [], bits3 = [], lastn(# bits1, fillsgn(# bits1, bitsand(bits1, false ' + true ' + bits))) = lastn(# bits1, fillsgn(# bits1, bitsand(bits3 + bits1, false ' + true ' + bits)))

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Rule argument

Additional information

Used simplifier rules: ⊦ (bits + bits0) + bits1 = bits + bits0 + bits1;% ⊦ boolvar ' + bits ≠ [];