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Proof step 675 from proof bitsand-cast (previous step)

false ' + true ' + bits ≠ [] ∧ bits1 ≠ [], # bits1 = 2 + # bits, # bits3 < m, # bits3 + # bitsand(bits1, false ' + true ' + bits) < 2 + # bits + m ⊦ # bits3 = m, mklist(false, m) + bitsand(bits1, false ' + true ' + bits) = lastn(2 + # bits + m, fillsgn(2 + # bits + m, mklist(false, # bits3) + bitsand(bits1, false ' + true ' + bits))), bits1 = [], bits2 + mklist(false, m) = [], bits3 + bits1 = [], bits3 = [], bits3.first

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 676:
# bits1 = 2 + # bits, # bits3 < m, # bits3 + # bitsand(bits1, false ' + true ' + bits) < 2 + # bits + m ⊦ # bits3 = m, mklist(false, m) + bitsand(bits1, false ' + true ' + bits) = lastn(2 + # bits + m, fillsgn(2 + # bits + m, mklist(false, # bits3) + bitsand(bits1, false ' + true ' + bits))), bits2 + mklist(false, m) = [], bits3 + bits1 = [], bits3 = [], bits1 = [], bits3.first

Rule argument

Additional information

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