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Proof step 778 from proof bitsand-cast (previous step)

# bits1 ≠ # bitsand(bits1, false ' + true ' + bits), # bits1 = 2 + # bits ⊦ bits1 = [], bits4 + bits1 = [], bits4 = [], bits2 = [], bitsand(bits1, false ' + true ' + bits) = lastn(# bits1, bitsand(bits1, false ' + true ' + bits))

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 779:
# bits1 = 2 + # bits ⊦ # bits1 = # bitsand(bits1, false ' + true ' + bits), bitsand(bits1, false ' + true ' + bits) = lastn(# bits1, bitsand(bits1, false ' + true ' + bits)), bits2 = [], bits4 = [], bits4 + bits1 = [], bits1 = []

Proof step 778 from proof bitsand-cast (previous step)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Rule argument

Additional information