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SeaHorn

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What SeaHorn is

SeaHorn is an open-source framework for analyzing C and other LLVM-based programs, with a focus on automated verification research. It is designed to be assembled into an analysis workflow rather than used as a ready-made static analyzer. Its frontend prepares LLVM-based input as LLVM IR bitcode, and its middle end turns optimized bitcode into verification conditions expressed as Constrained Horn Clauses. Backend engines use SMT-based model checking, including PDR/IC3 approaches, to examine those conditions. Supported techniques include abstract interpretation, context-sensitive pointer analysis, bounded model checking, and software model checking. SeaHorn can also analyze termination and non-termination using candidate ranking functions and backend verification engines.

For C programs containing assertions, the `sea pf` command generates and solves verification conditions. It can display computed invariants for a safe result or save an executable counterexample when it finds a violation. The optional Crab abstract interpretation component can supply numerical invariants to the Spacer backend. The `sea inspect` command reports program structure and can generate memory or call graph data. SeaHorn can also use path coverage of generated Horn clauses to identify inconsistent code fragments. It is available for Linux and macOS, with self-hosted deployment. The project describes its Docker distribution as the easiest starting route; building from source requires LLVM, Z3, and Boost.

Who it suits

SeaHorn suits researchers and developers working on automated verification of C or LLVM IR programs who can assemble an analysis workflow. It is relevant when invariant analysis, model checking, pointer analysis, or termination checks are needed.

What it does well

Open-source framework distributed under a modified BSD license.
Supports SMT-based bounded and Horn-clause software model checking.
Can produce executable counterexamples for violations.
`sea pf` can display invariants for safe C programs.
`sea inspect` can generate memory or call graph data.

What to know first

The project is not an out-of-the-box static analysis tool.
Building requires LLVM, Z3, and Boost.
Available platforms are Linux and macOS.

Getting started

Visit https://seahorn.github.io/.
Use the project's Docker distribution as its suggested easiest starting route.
Alternatively, build SeaHorn with LLVM, Z3, and Boost.
Run the relevant analysis workflow on C or LLVM IR input.

Verdict

Choose SeaHorn for research-oriented verification of C and other LLVM-based programs, especially when its model-checking and invariant-analysis components fit your workflow. Look elsewhere for a turnkey static analyzer or a platform beyond Linux and macOS.

Questions

Is SeaHorn free and open source?

Yes. SeaHorn is free and open source, and it is distributed under a modified BSD license.

Which platforms does SeaHorn support?

SeaHorn supports Linux and macOS, and it can be deployed self-hosted.

What languages can it analyze?

Its listed input languages are C and LLVM IR.

Does SeaHorn work as a ready-made static analyzer?

No. The project describes it as a framework, not an out-of-the-box static analysis tool.

What does SeaHorn analyze?

It supports abstract interpretation, context-sensitive pointer analysis, bounded model checking, and constrained Horn clause-based software model checking. It can also analyze termination and non-termination.

What is required to build SeaHorn?

Building it requires LLVM, Z3, and Boost. The exact library versions change.

Facts from SeaHorn's own pages

Additional analysis: SeaHorn’s `sea inspect` command can report program structure and generate memory or call graph data. · github.com, 9 Oct 2026
Analysis engines: Its backend uses SMT-based model checking engines based on PDR/IC3, and uses CRAB to provide numerical invariants through abstract interpretation. · seahorn.github.io, 10 Oct 2026
Analysis output: The `sea pf` command can display computed invariants for a safe result or save a counterexample for a violation. · github.com, 9 Oct 2026
Counterexamples: SeaHorn can produce executable counterexamples when it finds a violation. · github.com, 9 Oct 2026
C verification: Its `sea pf` command takes a C program with assertions, translates it to LLVM bitcode, generates verification conditions, and solves them. · github.com, 9 Oct 2026
Dependencies: Building SeaHorn requires LLVM, Z3, and Boost; its README says the exact library versions change. · github.com, 9 Oct 2026
Download: The site links to a SeaHorn Docker image described as SeaHorn for LLVM 3.8; Docker Hub shows the nightly image command as `docker pull seahorn/seahorn:nightly`. · hub.docker.com, 10 Oct 2026
Founders: The site lists Arie Gurfinkel, Temesghen Kahsai, and Jorge Navas as founders. · seahorn.github.io, 10 Oct 2026
Frontend: Its frontend takes an LLVM-based program such as C and generates LLVM IR bitcode, preprocessing and optimizing it for verification. · seahorn.github.io, 10 Oct 2026
Image status: Docker Hub says the SeaHorn image was updated about 7 years ago and lists its size as 642.7 MB. · hub.docker.com, 10 Oct 2026
Inconsistency checking: SeaHorn detects inconsistent code fragments by computing path coverage for generated Horn clauses. · seahorn.github.io, 10 Oct 2026
Integrations: The site identifies CRAB as the abstract interpretation analyzer SeaHorn uses to provide numerical invariants. · seahorn.github.io, 10 Oct 2026
License: SeaHorn is distributed under a modified BSD license. · github.com, 9 Oct 2026
Model checking: SeaHorn supports SMT-based bounded model checking and constrained Horn clause based software model checking. · github.com, 9 Oct 2026
Not a turnkey analyzer: The project says SeaHorn is not an out-of-the-box static analysis tool. · github.com, 9 Oct 2026
Optional analysis component: Crab abstract interpretation is optional and can supply invariants to SeaHorn’s Spacer backend. · github.com, 9 Oct 2026
Platforms: The README includes build instructions for Linux and a separate section on compiling on a Mac. · github.com, 9 Oct 2026
Pricing: The opened official site provides a Download section but no pricing information. · seahorn.github.io, 10 Oct 2026
Purpose: SeaHorn is a verification framework for LLVM-based programs. · seahorn.github.io, 10 Oct 2026
Static analysis: Supported features include abstract interpretation based static analysis and context-sensitive pointer analysis. · github.com, 9 Oct 2026
Support: The project says it provides support to new users and invites users to report issues when Docker tags become stale. · github.com, 9 Oct 2026
Termination analysis: SeaHorn can prove termination and non-termination by synthesizing and validating candidate ranking functions or producing a witness for non-termination. · seahorn.github.io, 10 Oct 2026
Use case: The site describes SeaHorn as a framework for analyzing programs and cites detecting abnormalities and serious bugs as a use of inconsistency checking. · seahorn.github.io, 10 Oct 2026
Verification conditions: Its middle end converts optimized LLVM bitcode into verification conditions expressed as Constrained Horn Clauses. · seahorn.github.io, 10 Oct 2026

Where SeaHorn stands on Freedom251

C and C++ Static Analysis Tools#21 of 25
Formal Verification Tools#33 of 34