Developing provably correct Rust code with Verus

I was talking to Gemini about comparing Verus to TLA+ and it said that TLA+ is usually used (for example) "to prove that a distributed consensus protocol is logically sound" but when I asked if Verus can do that too, it said yes. So Verus can be compiled and integrated with Rust, whereas TLA+ is used more for blueprint development that then guides the implementation in the mind of the implementer.

Seems awesome!

[0]: https://news.ycombinator.com/item?id=12357976

IMO, formal verification is never going to work. It's very clear that a lot of people are desperate to see it used in mainstream software development, but every innovation which proponents have seen as an opportunity to finally prove its utility has only served to further discredit it.

Now proponents are at a point that they literally have to convince us that people who aren't able to write correct code are somehow able to write correct mathematical specifications!

This is quite an extraordinary claim given that the mathematical specification is an order of magnitude longer and more complex than the code itself... And every experienced software engineer knows that mistakes grow proportionally to the size of the logic... Unfortunately, mathematical spec is logic; just like code, except it's more complex and thus more error-prone.

And don't even get me started on the fact that APIs, engines and languages change constantly from under you and thus the mathematical spec would get completely invalidated every week or so each time you did an update. I doubt any human being or machine will ever come up with even a single specification document which accurately describes the software it claims to prove correct.