Your V matrix will take 13057*13057*8 bytes of memory if you're using the default dtype=np. Float which is approx. 1.4GB.
My hunch is that that's too large for your 32-bit Python. Try using 32-bit floating point numbers, that is dtype=np. Float32 to cut memory use in half, or start using scipy.
Sparse (almost always a good idea for information retrieval problems).
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