NuSMV
NuSMV: A free, hybrid formal-verification tool for CTL, LTL, PSL, and invariant checking. Ranked #6 of 35 in Formal Verification Tools by our editors (9.0/10); pricing: Free plan; best for finite-state temporal-logic checking.
At a glance
- Editor score9.0 / 10
- PricingFree plan
- Best forFinite-state temporal-logic checking
- Free planYes
- Paid fromFree
- Verification methodHybrid
- Facts checked20 Sep 2026
Where it wins
- Combines BDD symbolic and SAT-based bounded model checking
- Checks CTL, LTL, PSL, and invariant specifications
- Generates counterexample traces for failed properties
Where it doesn't
- Focused on finite-state systems and SMV input models
- Self-hosted deployment requires local installation and operation
- Uses an interactive textual shell rather than a graphical interface
Our verdict on NuSMV
NuSMV is an open-source symbolic model checker for formal verification of finite-state systems. It is aimed at engineers, researchers, and verification teams working with synchronous or asynchronous models and properties expressed through CTL, LTL, PSL, or invariants. Models use the SMV input language, and the tool supports modular and hierarchical descriptions for structuring larger systems. It is distributed as source code and platform-specific binaries for Linux, macOS, and Windows.
The published distribution model is straightforward: NuSMV is free and open source, with no paid tiers described. Its verification approach combines BDD-based symbolic model checking with SAT-based bounded model checking, giving users two complementary methods within one tool. In addition to property checking, it supports invariant analysis and generates counterexample traces when properties fail. That combination makes it a practical fit for finite-state temporal-logic work where understanding a failed specification is as important as identifying the failure.
NuSMV’s main trade-off is its focused scope. It is designed for finite-state formal verification, accepts SMV models, and uses a self-hosted deployment model with an interactive textual shell. That suits users who want a source-available verification tool that runs across major desktop operating systems and supports modular model descriptions. Teams seeking a graphical workflow, a broader input-language range, or a managed hosted service should choose a different tool. NuSMV is the stronger fit for users comfortable with formal specifications and command-line-oriented model checking who need CTL, LTL, PSL, invariant analysis, and counterexample generation in an open-source package.
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NuSMV pricing
NuSMV fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Free |
| Verification method | Hybrid |
| Supported formalisms | Temporal-logic |
| Counterexamples | Yes |
| Proof artifacts | Not verified |
| Input languages | SMV |
| Deployment | Self-hosted |
| Deployment | Self-hosted |
| Platforms | Windows, macOS, Linux |
| Support | Email, Community, Docs |
| Built for | Small business, Mid-market, Enterprise (editorial estimate) |
| Pricing | Free plan |
| Website | nusmv.fbk.eu |
| Facts checked | 20 Sep 2026 |
Alternatives to NuSMV
- IsabelleA free, open-source proof assistant for broad mathematical and systems verification.9.4
- RocqA free, kernel-checked theorem prover with dependent types, automation, and certified extraction.9.3
- PVSA broad, self-hosted environment for hybrid formal verification workflows.9.2
NuSMV vs the competition
Compare NuSMV with any tool side by side →
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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