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Proof step 878 from proof bitsand-cast (previous step)

¬(# bits0 ≤ # bits1 ∧ bits0 ≠ [] ∧ ¬ bits0.first), mklist(true, # bits1) = bits1, # bits0 < # bits1 ⊦ bits1 = [], lastn(# bits1, fillsgn(# bits1, bits0)) = lastn(# bits1, fillsgn(# bits1, bitsand(bits2 + bits1, bits0))), bits0 = [], bits2 + bits1 = []

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 879:
mklist(true, # bits1) = bits1, # bits0 < # bits1, bits0.first ⊦ bits1 = [], lastn(# bits1, fillsgn(# bits1, bits0)) = lastn(# bits1, fillsgn(# bits1, bitsand(bits2 + bits1, bits0))), bits0 = [], bits2 + bits1 = []

Rule argument

Additional information

Used simplifier rules: ⊦ m < n → ¬ n < m;% ⊦ ¬ m ≤ n ↔ n < m;