p-org/P: The P programming language.

Challenge: Distributed systems are notoriously hard to get right. Programming these systems is challenging because of the need to reason about correctness in the presence of myriad possible interleaving of messages and failures. Unsurprisingly, it is common for service teams to uncover correctness bugs after deployment. Formal methods can play an important role in addressing this challenge!

P Overview: P is a state machine based programming language for formally modeling and specifying complex distributed systems. P allows programmers to model their system design as a collection of communicating state machines. P supports several backend analysis engines (based on automated reasoning techniques like model checking and symbolic execution) to check that the distributed system modeled in P satisfy the desired correctness specifications.