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Proof step 64 from proof bitsand-cast-01 (previous step)

# bits1 ≠ # bitsand(bits, bits1), # bits1 = # bitsand(bits1, bits), # bits = # bits1 ⊦ bits1 = [], bits2 + bits1 = [], bits2 = [], bits3 + bits = [], bits3 = [], lastn(# bits1, bitsand(bits, bits1)) = bitsand(bits1, bits), bits1.first

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 65:
# bits = # bits1, # bits1 = # bitsand(bits1, bits) ⊦ # bits1 = # bitsand(bits, bits1), lastn(# bits1, bitsand(bits, bits1)) = bitsand(bits1, bits), bits3 = [], bits3 + bits = [], bits2 = [], bits2 + bits1 = [], bits1 = [], bits1.first

Proof step 64 from proof bitsand-cast-01 (previous step)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Rule argument

Additional information