We have a practice of occasionally re-analyzing projects we have already checked with PVS-Studio. There are several reasons why we do so. For example, we want to know if we have managed to eliminate false positives for certain diagnostics. But the most interesting thing is to see how new diagnostic rules work and what errors they can find. It is very interesting to watch the tool catch more and more new defects in a project that seems to be cleaned out already. The next project we have re-checked is Clang.

http://www.viva64.com/en/b/0155/