The Costa Group

[ALBERT RUBIO @ALBERTRUBIO33]

Tomorrow at 4pm I'll be at Real-Time Proofs in Motion by @ziskvm speaking about "A General Approach to Verifying zkVM Arithmetizations"
https://t.co/sRm95NsIFA

[Solidity @solidity_lang]

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

[Solidity @solidity_lang]

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

[Solidity @solidity_lang]

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.

[Solidity @solidity_lang]

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.

[ziskvm @ziskvm]

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: https://t.co/yTKT3ibdEg

[Solidity @solidity_lang]

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.

[ALBERT RUBIO @ALBERTRUBIO33]

#circom 2.2.3 is just released. Check for more details
https://t.co/8AY3IuRlpb

[The Costa Group @TheCostaGroup]

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. 📄

[The Costa Group @TheCostaGroup]

🚨 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: https://t.co/QW3v6f8wTL

🧵

[The Costa Group @TheCostaGroup]

5/ Bugs have been reported as issues:

https://t.co/R5PEuOAcTO

https://t.co/GTgVV1YEsC

[Einar Broch Johnsen @ebjohnsen]

@EnvisageProject on the Cordis website https://t.co/nemRPXIav2

[Xebia @Xebia_Global]

Our UK team keeps growing! Excited to welcome @diesalbla to our roster as Senior Software Engineer #Scala . https://t.co/OfmHFgCcwK

[CWI @CWInl]

Annual meeting @EnvisageProject at CWI

[The Costa Group @TheCostaGroup]

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

[Roberto Giacobazzi🇮🇹🇺🇸🇫🇷⛳️🌵 @rgiacobazzi]

Remembering German Puebla at PEPM2015

[The Costa Group @TheCostaGroup]

New Publication: Non-Cumulative Resource Analysis. Accepted at TACAS'15. http://t.co/P8QzQVv4rE