Software Modeling with TLA+ 3-Day Training

Hillel Wayneis a formal methods educator and consultant. He is on the Alloy board and in charge of writing the newonline reference documentation. He is a certified EMT in Illinois.

<h2>Overview</h2><p></p><p>Most software ﬂaws come from one of two places. When the code doesn’t match our expectations, it could be that the code is wrong. Most software correctness techniques - types, tests, etc - are used to check the code. But it could instead be that the code is correct and our expectations are wrong: there’s a fundamental error in our model of the system. These bugs are the most difficult to find and the most expensive to fix. Our standard techniques cannot handle them.</p><p>The answer to this is software modeling, or &quot;formal methods&quot;. By writing out the design in a software modeling tool, we can directly test the design for bugs <em>without having to write any code first.</em> Modeling software leads to simpler, safer systems built more quickly and cheaply. </p><p>One such modeling tool is TLA+. TLA+ is designed to model concurrent and distributed systems, and has been successfully to find bugs in everything from <a href="https://www.cslab.pepperdine.edu/warford/math221/How-Amazon-Web-Services-Uses-Formal-Methods.pdf" target="_blank" data-msys-clicktrack="0" rel="nofollow noopener noreferrer">cloud services</a> and <a href="https://www.youtube.com/watch?v=oMSmkRGzQ64" target="_blank" data-msys-clicktrack="0" rel="nofollow noopener noreferrer">message queues</a> to video games and <a href="https://dl.acm.org/doi/10.5555/1779934.1779955" target="_blank" data-msys-clicktrack="0" rel="nofollow noopener noreferrer">embedded operating systems</a>.</p><p>In this class you will learn the basics of TLA+ from one of the foremost experts on teaching formal methods.  </p><h2>Structure</h2><p>Class will be three days by Zoom. Instruction is a mix of lecture, group labs, and individual and group exercises. Attendees should expect a high degree of student participation. I teach workshops so that students learn.</p><p>Note that the class is not comprehensive. Some aspects of TLA+ will not be taught. In particular, the class uses the PlusCal DSL for writing TLA+ specs. This is a conscious choice to give students the strongest foundation possible.</p><h2>Audience</h2><p>Attendees should have some experience programming and some experience testing. While TLA+ is extremely powerful, it is best used by experienced programmers. Some knowledge of predicate logic, such as ∀ and ∃, is helpful but not necessary.</p><h2>About the Instructor</h2><p><a href="https://www.hillelwayne.com" target="_blank" data-msys-clicktrack="0" rel="nofollow noopener noreferrer">Hillel Wayne</a> is a formal methods educator and consultant. He is the author of <a href="https://learntla.com/introduction/" target="_blank" data-msys-clicktrack="0" rel="nofollow noopener noreferrer">Learn TLA+</a>, <a href="https://www.amazon.com/Practical-TLA-Planning-Driven-Development/dp/1484238281" target="_blank" data-msys-clicktrack="0" rel="nofollow noopener noreferrer">Practical TLA+</a>, and <a href="https://alloy.readthedocs.io/en/latest/" target="_blank" data-msys-clicktrack="0" rel="nofollow noopener noreferrer">alloydocs</a>. Some of his past clients are Facebook, Netflix, and Cockroach Labs. He is a certified EMT in Illinois.</p>

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Software Modeling with TLA+ 3-Day Training

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