I just updated our weighted-to-unweighted CNF converter tool. It can now work on any non-negative rational weights. We could submit ApproxMC to weighted tracks of the Model Counting Competition! Too late now, but next year :).

If you are curious why is it so hard to write a high-performance SAT/SMT solver/model counter, read this:. It's about one of the most important inprocessing steps, vivification, and how to do it *right*. It turns out "trivial" things are. not so trivial.

RT @SourcifyEth: 🍓 All verified smart contracts on Sourcify right at your fingertips @fileverse!.

10 years of Ethereum party at the @ethereumfndn office, yay!

It's a pleasure and a privilege to have met and got to know some of these people in person. They are actually very cool, smart, and kind. Sad that many only know of Vitalik. The others are wonderful people, too.

Today I realised we must teach teach colonialism at high school. I met young people organising what I can only describe as neocolonial events. They asked me to join, and I sarcastically said OK, but only if it's in a very poor country. Happily they informed me it is indeed! :S.

RT @matthew_d_green: If lightweight cryptography was a good idea, we’d just call it “cryptography.”.

RT @argotorg: 🚨The @OctantApp epoch 8 allocation window closes in a few hours (6 pm CEST / 4 pm UTC / 12 pm EDT). No donation is too smal….

Our presentation on our SOTA Model Counter, Ganak, at CAV 2025 is now online: You can play with Ganak online:

RT @argotorg: New hevm release landed! . This version brings improvements on several fronts:. ✅ Improved usability.✅ Faster performance.✅ D….

Wow, what happened to ICTAI? Did it just get overtaken by LLM papers? Trying to find a paper I have the expertise to review and it's impossible. I feel like an old man yelling at the cloud. I need to dig myself into LLMs or my knowledge will become obsolete. Strange.

Oh wow, exciting Halmos release, 0.3.0! Yices is the default solver, and some other fun improvements. Cool stuff, Halmos team :). @0xkarmacoma.

Note: some illustrations are from [1], all of which are highlighted and specifically spelled out to be BSD 3-Clause License on each slide. These are Copyright Takenobu Tani. [1]

My presentation on Smart Contract Verification at the Summer School on Security Testing and Verification in Brussels:. There's a LOT in there about "why does this all matter", from use-cases to hacks. Source code included & it's GPL.

RT @ethereumfndn: We are happy to announce that today the EF provides @argotorg with 3 years of operational funding to continue to support….

RT @SourcifyEth: 7 Million and counting 🫡

RT @OctantApp: 🥁🥁🥁 It's @solidity_lang 🌐. The language that powers billions of dollars worth of smart contracts on Ethereum and hundreds of….

Turns out our property-based fuzz-testing was not running correctly, because:. a=fuzz_gen().v1=simp(a).v2=SMT-simp(a).assert(v1==v2). Sounds good. until you realize that SMT-simp() accidentally has simp() inside :D Ooops!. Turns out, Dagstuhl was useful!.

Leo Alt talking about @powdr_labs — automatic compilation is faster than the hand written assembly!. #protocolberg

I'll be giving a talk at COSIC, KU Leuven on Functional Synthesis on the 8th of July, come around if you are around!.