You are already searching an impossible to find needle in a haystack so why are you making your own job harder by doing the search using the HD key derivation function? Why not just search for private keys and avoid all the extra overhead of the key derivation?!
If you were able to find a private key to steal other people's money (which you would never be able to) it doesn't matter if that key was derived from a master key or was found at random.

It is like wanting to find z from x+y=z but instead of first adding x and y you go ahead and compute pow, sqr, sqrt, cos, sin, sin^-1,... of both x and y then finally add x and y to find z.

The btc_top_100000.bin file appears to be a binary file that is input to the BloomFilter class. In that case, I think that it would be useful if you modify your program to have another script that reads a file full of addresses, and writes a bloom filter containing them so it can be used with arbitrary addresses.