Dear Keyur,
This is a huge assembly with 501 solid bodies. But basically the bodies have been simplified really well, so they are actually cuboids or simple bodies with straight surfaces.
If I want to subtract one from the other, I get an error, so the bodies are clearly not intersecting, and if I check just one solid body it shows no duplicate faces. 
It looks as if the tolerance of the contact surface of the two bodies is such that it perceives them as duplicates (so the 2 surfaces coincide), but at the same time you can't subtract one from the other, so they still just touch, not intersect.
Kind regards,
Levente
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