In modern use on most architectures these are much rarer than segmentation faults, which occur primarily due to memory access violations: problems in the "logical" address or permissions.
Other activities reviewed included alleged reprisal against sources reporting avionics maintenance, emergency response planning, supply management, and media access violations.
It finds errors, such as data-races, deadlocks, livelocks, and data-corruption induced access violations, that are extremely hard to find with current testing tools.
