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Proof step 915 from proof bitsand-cast (previous step)

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

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 916:
# bits = # bits1, mklist(true, # bits1) = bits1 ⊦ bits1 = [], bits3 + bits = [], bits = lastn(# bits1, fillsgn(# bits1, bitsand(bits3 + bits, bits1)))

Proof step 915 from proof bitsand-cast (previous step)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Rule argument

Additional information