The UNSAT group aims to develop foundational technologies for improving the correctness and performance of practical computer systems. Our research spans the areas of formal methods, programming languages, and operating systems. We build verification and synthesis tools and use these tools to build efficient, reliable, and secure systems. We are part of the Paul G. Allen School at the University of Washington. See our papers and projects for more details about our research.

If you are interested in joining our group, see the page for prospective students. We currently don’t have any positions for internships, visiting scholars, or postdocs.



Our paper on applying formal methods to BPF just-in-time compilers in the Linux kernel will appear at OSDI 2020.


Xi gave a keynote on Serval at VSTTE 2020.

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Graduate students



You may reach us via email at .


Thanks to NSF, DARPA, the Alfred P. Sloan Foundation, Google, Intel, and VMware for supporting our work.