We're not. But: good news: people are experimenting with verifying specs at compile time! And since specs come with quickcheck built in, you get a lot of "free"

We're not. But: good news: people are experimenting with verifying specs at compile time! And since specs come with quickcheck built in, you get a lot of "free" (in developer hours) "compile time" (actually: development time) verification. I appreciate that is not the same thing as a proof system :-)