I was looking for your pretty-config.xml configuration and web.xml. But since this is already an Arquillian test case, could you upload the project here so we can run it? If not, perhaps try to reproduce this in a smaller example project that you could upload?
Due to the message “PrettyFilter shutting down…” I was assuming that the shutdown of PrettyFaces was hanging. After switching off PrettyFaces I realized that the shutdown of the Weld service was the problem. Next I tried JBoss’ nightly build for 7.2 which uses Weld 1.1.10 (instead of 1.1.9 being used in JBoss 7.1.3) and the issue is gone.
There was never an issue with PrettyFaces – Weld was causing the problem. Maybe you should provide a message “PrettyFaces shutdown complete” or something like that.