ResearchResearch paperReasoning & Planning · Efficiency & Inference · Large Language Models1 source · Oct 7, 2026

Beyond Type-checking: Towards Holistic Evaluation of Formal Specification Generation

When generating verifiable code, natural language requirements are mapped to machine checked code using LLMs and agentic workflows.

Key points

  • A crucial component of this pipeline is specification generation (SpecGen), which produces a formal contract against which an agent can prove implementation correctness.
  • Proof generation can obtain deterministic feedback from a theorem prover, but SpecGen lacks a definitive check that a generated specification captures the user's intent.
  • We take a step towards holistic SpecGen evaluation with a unified dataset assembled from $350$ existing Lean tasks, including $189$ from VERINA and $161$ from CLEVER, and a framework covering formal validity, reference similarity and equivalence, and behavioural adequacy.
  • Across four SpecGen configurations, restricting the generalized tree edit distance (GTED) comparison, a reference similarity measure, to $32$ jointly measurable VERINA tasks changes the VERINA configuration's position from second to fourth in mean similarity, showing the importance of measurement coverage.

Sources (1)

  • [1]Beyond Type-checking: Towards Holistic Evaluation of Formal Specification Generation
    arXiv (AI, ML, NLP, CV, robotics, multi-agent) · Oct 7, 02:11 AM
    When generating verifiable code, natural language requirements are mapped to machine checked code using LLMs and agentic workflows.
    A crucial component of this pipeline is specification generation (SpecGen), which produces a formal contract against which an agent can prove implementation correctness.

Extractive summary: sentences quoted from the sources.

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