touching objects in a scene

[ibrakola]

Hello, I randomly generated in a scene, the tetrahedra contained in a box without them coming into contact with the one, nor with the box. I manage to generate at least about 50, but that they are in contact beyond, arrested or jai peaks that are starting to touch it. I wish I had an idea why I can not go beyond a 50 without the latter does this affect, as I would like generates at least 1000. thank you!