Playing 1.d4

Am I right playing 1.d4 with this?

It looks like Black is cramped and has a lot of problems to resolve.

My database doesn't have your c5 push.

c5 isn't good, you generally want to keep the tension and retain the ability to exchange / advance later on. Closing the area where you have a space advantage (queenside in this case) is never a good idea because your play will happen there - closing it is like closing your own play.

In the semi-slav, black typically takes on c4 and then your play will come from gaining central space with e4, and then kingside pressure / space squeeze.

c5 and then Rc1 is counter-intuitive.  If you play c5, you might want to play Rb1 and use the b pawn for your break.  But generally you should play cxd5 and then occupy the c file.

@spaghettio

Computers won't necessarily see this kind of stuff...

It's a positionally bad move and Houdini might not be able to give the correct it evaluation until moves later.