cvc5

Free#21 of 35 in Formal Verification Tools

cvc5: A broad theorem-proving tool for SMT solving, synthesis, models, and proof production. Ranked #21 of 35 in Formal Verification Tools by our editors (7.4/10); pricing: Open source; best for SMT, synthesis, and proof production.

7.4/10★★★★☆Editor score

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At a glance

• Editor score
  7.4 / 10
• Pricing
  Open source
• Best for
  SMT, synthesis, and proof production
• Paid from
  Free
• Facts checked
  20 Sep 2026

• Where it wins

  • Supports SMT solving, first-order validity, and SyGuS
  • Offers C++, C, Java, and Python APIs plus SMT-LIB v2
  • Produces models, unsat cores, and proofs in multiple formats

• Where it doesn't

  • Its focus is centered on theorem-proving workflows
  • Proof output is limited to CPC, Alethe, LFSC, and DOT formats
  • Open-source distribution does not provide paid-tier feature separation

Our verdict on cvc5

cvc5 is an open-source automatic theorem prover for Satisfiability Modulo Theories problems. It checks satisfiability or validity of first-order formulas over combinations of background theories and includes a Syntax-Guided Synthesis engine. The tool is suited to researchers, developers, and verification teams working with SMT, theorem proving, synthesis, or proof-producing workflows. It can run as a standalone command-line tool or as a library, with binaries for Linux, macOS, and Windows, an online interface, and APIs for C++, C, Java, and Python.

Its main strength is breadth within formal reasoning. cvc5 accepts SMT-LIB v2 input and supports satisfiability checking, first-order validity checking, and SyGuS. The API exposes proof-object retrieval, while model, unsat-core, and proof production options support different verification and debugging needs. Proof output is available in CPC, Alethe, LFSC, and DOT formats, giving teams several ways to work with proof artifacts. This combination makes cvc5 a strong fit when one tool must cover solving, synthesis, and inspectable proof results.

Deployment is flexible across web, desktop, and API use, while the open-source model supports standalone distribution rather than separate commercial feature tiers. The trade-off is focus: cvc5 is designed around theorem-proving methods and the listed SMT, first-order, and synthesis workflows, not a broad collection of unrelated verification approaches. Choose it when SMT solving, SyGuS, multiple programming-language APIs, or proof production are central requirements. Consider another tool when your work falls outside those formalism and proof-output needs.

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cvc5 pricing

cvc5 fact sheet

Alternatives to cvc5

• IIsabelleA 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
• PPVSA broad, self-hosted environment for hybrid formal verification workflows.9.2

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Featured on iTechGuides

cvc5 is listed in our Formal Verification Tools directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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Last updated 7 Oct 2026 · How we research and update