The Costa Group

Tomorrow at 4pm I'll be at Real-Time Proofs in Motion by @ziskvm speaking about "A General Approach to Verifying zkVM Arithmetizations" luma.com/9mydf126?tk=yy…

Building on that, Alejandro Cerezo, walked us through a framework that builds upon the SSA-CFG representation!

And lastly, Samir Geniam, presenting formal semantics for Yul at the CFG level using Coq!

Taking the stage next is Samir Geniam, presenting formal semantics for Yul at the CFG level using Coq - and how this work powers verification tools in the FORYU project.

On the stage right now: Alejandro Cerezo, guiding us through a framework that builds upon the SSA-CFG representation to generate highly efficient EVM code while avoiding stack-too-deep issues.

ZisK at Devconnect 2025 - Real-Time Proofs in Motion Following our recent milestone in real-time zk-proofing of Ethereum, we’re continuing the conversation at @EFDevcon Join us on Nov 20 at Aleph Hub, 11 AM for deep dives, Workshop, and discussions on ZisK and the path toward scalable, trustless computation with contributors from @ethereum , @OpenZeppelin , @TheCostaGroup , @boundless_xyz , @zksync , @brevis_zk, @SuccinctLabs, and more. Register here: luma.com/9mydf126

Attend Alejandro Cerezo's talk that will walk us through a framework that builds upon the SSA-CFG representation to generate efficient EVM code while addressing the stack-too-deep problem.

#circom 2.2.3 is just released. Check for more details github.com/iden3/circom/b…

6/ Both bugs would compromise ZisK soundness if deployed. Thanks to CIVER, they've been caught and fixed early and won’t reach production. Full recursion/aggregation verification is in progress. A complete public report is coming soon. 📄

5/ Bugs have been reported as issues: github.com/0xPolygonHerme… github.com/0xPolygonHerme…

🚨 Two critical soundness bugs found in ZisK using CIVER 🚨 In a collaboration with the @ziskvm development team, the Costa group is applying formal methods to verify recursion/aggregation circuits of ZisK. 🔗More details here: costa.fdi.ucm.es/web/news/CIVER… 🧵

@EnvisageProject on the Cordis website cordis.europa.eu/result/rcn/190…

Our UK team keeps growing! Excited to welcome @diesalbla to our roster as Senior Software Engineer #Scala . buff.ly/1ShuCsf

Annual meeting @EnvisageProject at CWI

New Publication: "Object-Sensitive Cost Analysis for Concurrent Objects" at Software Testing, Verification and Reliability

Remembering German Puebla at PEPM2015

New Publication: Non-Cumulative Resource Analysis. Accepted at TACAS'15. etaps.org/2015/tacas