Oh that is super cool. Great prior art to study in combo with Loom. Very excited to dig in - imagine if there was an easy-to-use data race tester where you didn't have to figure out the interleaving points up front? Just point it at your code and let it find them. Exciting.

Loom does exhaustive search, with clever methods to prune it. On real world programs, you have to set a limit to that because it obviously grows extremely quickly even with the pruning.

I've built something similar to Loom, except it's more focused on extensively modeling the C++11/Rust memory model (https://github.com/reitzensteinm/temper). My experience is that fairly shallow random concurrent fuzzing yields the vast majority of all concurrency bugs.

Antithesis (https://antithesis.com/) are probably the leaders of the pack in going deeper.