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Proof step 503 from proof bitsand-cast (previous step)

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

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 504:
# bits1 = 2 + # bits ⊦ # bits1 = # bitsand(bits1, true ' + false ' + bits), bits4 = [], bits2 = [], lastn(# bits1, fillsgn(# bits1, bits4 + bitsand(bits1, true ' + false ' + bits))) = lastn(# bits1, bitsand(bits2, bits4) + bitsand(bits1, true ' + false ' + bits)), bits1 = [], bits4 + bits1 = []

Proof step 503 from proof bitsand-cast (previous step)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Rule argument

Additional information