I'm not sure if there's a formal proof, but I believe its inherently undecidable. There's some discussion here https://stackoverflow.com/questions/7237963/a-c-

I'm not sure if there's a formal proof, but I believe its inherently undecidable. There's some discussion here https://stackoverflow.com/questions/7237963/a-c-implementation-that-detects-undefined-behavior https://stackoverflow.com/questions/7237963/a-c-implementati...