Give up on overflow protection

It seems the LAP algorithm cannot work reliably in cases of large
integers. So we just use the lower half, setting "infinity" at:
1073741823 on my 64bit machine.

This means that very large systems might not be analyzed correctly
on 32-bit systems  *sigh*.

Signed-off-by: Christoph Höger <christoph.hoeger@tu-berlin.de>