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Proof step 7 from proof bxor-bitlength (previous step)

# int2bits(j) < # int2bits(bor(band(i, bcompl(j)), band(bcompl(i), j))), # int2bits(i) < # int2bits(bor(band(i, bcompl(j)), band(bcompl(i), j))), n ≤ # int2bits(bor(band(i, bcompl(j)), band(bcompl(i), j))), # int2bits(j) < n, # int2bits(i) < n ⊦ ¬ n ≤ # int2bits(band(i, bcompl(j))) ∧ ¬ n ≤ # int2bits(band(bcompl(i), j))

User applied rule case distinction

And obtained the following new goals

Rule argument

pos: right 1

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