Z3Prover/z3 on Hacker News

It's reference-counted at the boundaries. See https://github.com/Z3Prover/z3/blob/daf2506b6002149d531cb6c9...

comment by invl · 2026-04-18 · in A Dumb Introduction to Z3 (2025)

…verification, and optimization.” https://www.microsoft.com/en-us/research/project/z3-3/ See also: https://github.com/Z3Prover/z3

comment by gbacon · 2025-11-17 · in Z3 API in Python: From Sudoku to N-Queens in Under 20 Lines (2015)

…- which is different from the program drawing insights from organically accumulated data. [1] https://github.com/Z3Prover/z3?tab=readme-ov-file [2] https://microsoft.github.io/z3guide/programming/Z3%20Python%... [3]…

comment by abhgh · 2025-10-12 · in Let's Take Esoteric Programming Languages Seriously

For what it's worth, the way 14MV does hints is probably by just throwing the board into Z3 ( https://github.com/Z3Prover/z3 ) or some other constraint solver. Microsoft has already done all the hard work for you.

comment by npinsker · 2025-07-09 · in Making Explainable Minesweeper

…with a .NET language, there is also this very useful file with examples of how to use the bindings: https://github.com/Z3Prover/z3/blob/master/examples/dotnet/P... The examples are in C#, but easy to adapt to other languages. I found them…

comment by constructum · 2024-12-06 · in Accidentally writing a SAT solver

https://github.com/Z3Prover/z3 Here is an actual description: https://z3prover.github.io/papers/programmingz3.html#sec-int...

comment by phi-go · 2024-02-21 · in Planner programming blows my mind

…under development and people were using linear search and not hash tables to do their lookups. Also https://github.com/Z3Prover/z3 Note “the semantic web” is both an advance and a retreat in that OWL is a subset of first order logic which…

comment by PaulHoule · 2023-12-26 · in Ask HN: What is the current state of "logical" AI?

…in the language[5]. [1] https://www.microsoft.com/en-us/research/project/code-contra... [2] https://github.com/Z3Prover/z3 [3] https://github.com/microsoft/CodeContracts [4] https://github.com/dafny-lang/dafny [5]…

comment by Genbox · 2023-10-27 · in Lean4 helped Terence Tao discover a small bug in his recent paper

…functionality, although, it uses the [0]Z3Prover tool with a nim frontend [1]DrNim for proving. [0] https://github.com/Z3Prover/z3 [1] https://nim-lang.github.io/Nim/drnim.html

comment by janAkali · 2023-06-29 · in Programming languages going above and beyond

…these problems without a capable and expressive solver. [0] https://github.com/potassco/clingo [1] https://github.com/Z3Prover/z3 [2] https://arxiv.org/abs/2210.08404 , https://dl.acm.org/doi/abs/10.5555/3571885.3571931 [3]…

comment by tgamblin · 2023-05-26 · in Modern SAT solvers: fast, neat and underused (2018)

…more robust (provided its the type you're after) than someones 700 LoC JavaScript implementation. https://github.com/Z3Prover/z3

comment by girvo · 2022-09-15 · in The Little Prover

…2: https://alloytools.org/ 3: https://www.gnu.org/software/octave/index 4: https://github.com/z3prover/z3

comment by gjadi · 2022-06-07 · in Ask HN: When you code at work, how do you code in your time off?

…a first-level standard[5]. [1] https://www.microsoft.com/en-us/research/project/code-contra... [2] https://github.com/Z3Prover/z3 [3] https://github.com/dotnet/runtime/issues/20006 [4] https://docs.microsoft.com/en-us/dotnet/csharp/nullable…

comment by Genbox · 2022-05-29 · in Make formal verification and provably correct software practical and mainstream

…by the other. [1] https://github.com/Ericsson/codechecker [2] https://clang-analyzer.llvm.org/ [3] https://github.com/Z3Prover/z3

comment by yaantc · 2022-04-20 · in IKOS: Static analyzer for C/C++ based on the theory of Abstract Interpretation

…// Start by getting Z3, a theorem prover from Microsoft, via nuget. See https://github.com/Z3Prover/z3 using Microsoft.Z3; using System; // get a solution ulong Solution(Context ctx, BoolExpr f, BitVecExpr seed) { Solver s = ctx.M

comment by ChrisLomont · 2021-10-18 · in Cracking Random Number Generators Using Machine Learning

…?)[3] if you are confused on how exactly to best approach Isabelle/HOL in your case. [0]: https://github.com/Z3Prover/z3 [1]: https://lamport.azurewebsites.net/tla/tla.html [2]: https://htdp.org/2021-5-4/Book/index.html [3]: [edit:…

comment by namibj · 2021-10-16 · in Functional Algorithms, Verified

…Z3 online version or another SMT solver that can be used online? Rise4fun is gone for good :-( https://github.com/Z3Prover/z3/issues/5472

comment by zimmski · 2021-09-23 · in How to solve logic puzzles with SMT solvers

…Examples include Google OR-tools, Microsoft Z3, etc. https://developers.google.com/optimization https://github.com/Z3Prover/z3

comment by asah · 2021-07-20 · in Using Prolog for Sudoku Variants

You might like a Satisfiability Modulo Theories (SMT) solver such as Z3. https://github.com/Z3Prover/z3 It has bindings for other languages and is able to make some rather sophisticated arithmetical and logical deductions in an often…

comment by schoen · 2020-02-05 · in Learn X in Y minutes Where X=Prolog

This? https://github.com/z3prover/z3 What is secret about it?

comment by ganzuul · 2020-02-03 · in A scalable photonic computer solving the subset sum problem

Had to look up z3 https://github.com/Z3Prover/z3

comment by philshem · 2019-11-15 · in Which answer in this list is the correct answer to this question? (2017)

…a6))))))) And the model also becomes unsatisfiable. So 5 only seems to be the correct answer. [0] https://github.com/Z3Prover/z3 [1] https://rise4fun.com/Z3/1DMW

comment by grubb · 2019-11-15 · in Which answer in this list is the correct answer to this question? (2017)

I have used the Z3 solver( https://github.com/Z3Prover/z3 ) to optimize a job scheduling problem. Roughly, I have ~20k jobs, defined by N tasks (~1-50). A job is complete only if M tasks (typically 2-3) per job are done. Every task takes…

comment by silly_giraffe · 2019-09-29 · in Modern SAT solvers: fast, neat and underused

…synthesis: https://medium.com/@vidiborskiy/software-writes-software-pro... [3] Z3 Theorem Prover: https://github.com/Z3Prover/z3 [4] Solidity AST: https://github.com/ethereum/solidity/blob/develop/libsolidit... [5] Solidity smart…

comment by saurabh20n · 2019-03-01 · in Ask HN: Who is hiring? (March 2019)

Found these links helpful: https://en.m.wikipedia.org/wiki/Satisfiability_modulo_theori... https://github.com/Z3Prover/z3/wiki/Slides Appears to be useful for static analysis and verification of a program.

comment by patsplat · 2019-02-06 · in Programming the Z3 SMT solver

…synthesis: https://medium.com/@vidiborskiy/software-writes-software-pro... [3] Z3 Theorem Prover: https://github.com/Z3Prover/z3 [4] Solidity AST: https://github.com/ethereum/solidity/blob/develop/libsolidit... [5] Solidity smart…

comment by saurabh20n · 2019-02-01 · in Ask HN: Who is hiring? (February 2019)

…https://fstar-lang.org/tutorial - see e.g. section 3 "First proofs about functions on integers" [4] https://github.com/Z3Prover/z3

comment by tomp · 2018-12-18 · in Dependent Haskell

…last year, so an SMT solver is validating all your S3 security policies for public access!) [3]: https://github.com/Z3Prover/z3

comment by KirinDave · 2018-11-09 · in Optimal Shard Placement in a Petabyte Scale Elasticsearch Cluster

…as simple as `pip install` and requires a lengthy build/compilation. Well worth the effort, though. https://github.com/Z3Prover/z3 https://github.com/Z3Prover/z3/issues/288

comment by Cieplak · 2017-05-18 · in Transform Data by Example [video]

what about this? https://github.com/Z3Prover/z3 Is it comparable with prolog or just a subset of prolog?

comment by est · 2017-04-06 · in The Power of Prolog

…more concrete. Feel free to shoot me an email if you like to talk more about formal methods :) [0]: https://github.com/Z3Prover/z3 [1]: http://www.event-b.org/

comment by aban · 2016-11-19 · in Why Don't Computer Scientists Learn Math?

Other people are already flooding you with counterexamples, but I'll add to the pileup: Z3 ( https://github.com/Z3Prover/z3 ) is the Satisfiability Modulo Theories (SMT) solver to use. It is such a quality piece of software and it's…

comment by ulber · 2016-09-15 · in Microsoft is now the leading company for open source contributions on GitHub

…One of the driver validation tools makes use of the Z3 theorem prover as its verification engine https://github.com/z3prover/z3/wiki http://research.microsoft.com/en-us/um/redmond/projects/z3/s... https://msdn.microsoft.com/en-us/library/wi…

comment by pjmlp · 2015-09-30 · in Critique of Microkernel Architectures – Is Linus Right? (2004) [pdf]

…expressed in predicate logic accepted by Z3. You can do all sorts of neat stuff then; check out https://github.com/Z3Prover/z3/wiki/Publications Some general examples: * Does firewall 1 accept a subset of the packets accepted by firewall…

comment by ahelwer · 2015-05-18 · in Solving a Crackme using Z3: Theorem Prover