Using Lightweight Formal Methods to Validate a Key-Value Storage Node in Amazon S3. - James Bornholt; Rajeev Joshi; Vytautas Astrauskas; Brendan Cully; Bernhard Kragl; Seth Markle; Kyle Sauri; Drew Schleit; Grant Slatton; Serdar Tasiran; Jacob Van Geffen; Andrew Warfield (SOSP, 2021)