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Proof step 377 from proof bitsand-cast (previous step)

bits2 + mklist(boolvar, n - 1) + boolvar ' + boolvar0 ' + bits = (bits2 + mklist(boolvar, n - 1)) + boolvar ' + boolvar0 ' + bits, sgn(mklist(boolvar, n - 1) + boolvar ' + boolvar0 ' + bits) = boolvar ' + boolvar0 ' + bits ⊦ boolvar ↔ boolvar0, bits0 = [], n = 0, lastn(n + 1 + # bits, fillsgn(n + 1 + # bits, bitsand(boolvar ' + boolvar0 ' + bits, bits0))) = lastn(n + 1 + # bits, fillsgn(n + 1 + # bits, bitsand(bits2 + mklist(boolvar, n - 1) + boolvar ' + boolvar0 ' + bits, bits0))), boolvar ∧ boolvar0

User applied rule insert equation

And obtained the following new goals

Rule argument

pos: left 1 flags: discard

Additional information