Making the machine check as much as possible about your code is a worthy and practical goal. I often try long and hard to capture as many invariants as possible in the type system. And even though the language that we are using, Haskell, has one of the strongest typesystems you can find, that's still not very much logic guaranteed by the compiler. Of course, run time checks can catch a few more errors, but I'd rather catch mistakes as early as possible.

You seem to have lots of experience with expressing intent in code, and making that intent 'canonical'. How do you make the machine check the accuracy of your code? What language are you using for that?