---
license: mit
tags:
- theorem-proving
- formal-methods
- dafny
- verification
- imperative-programming
task_categories:
- text-generation
- feature-extraction
language:
- en
size_categories:
- 1K<n<10K
configs:
- config_name: default
  data_files:
  - split: train
    path: data/train-*
dataset_info:
  features:
  - name: fact
    dtype: string
  - name: type
    dtype: string
  - name: library
    dtype: string
  - name: imports
    list: string
  - name: filename
    dtype: string
  - name: symbolic_name
    dtype: string
  - name: docstring
    dtype: string
  splits:
  - name: train
    num_bytes: 1829470
    num_examples: 9572
  download_size: 256624
  dataset_size: 1829470
---

# Dafny

A structured dataset of functions, lemmas, and predicates from **Dafny**, a verification-aware programming language.

## Source

- **Repository:** https://github.com/dafny-lang/dafny
- **Website:** https://dafny.org
- **License:** MIT

## Statistics

| Property | Value |
|----------|-------|
| **Total Entries** | 9,572 |
| **Functions** | 4,849 |
| **Predicates** | 2,468 |
| **Lemmas** | 2,255 |
| **Source Files** | 2,155 |

## Schema

| Column | Type | Description |
|--------|------|-------------|
| `fact` | string | Declaration signature with specs |
| `type` | string | "function", "predicate", or "lemma" |
| `library` | string | Dafny module/directory |
| `imports` | list[string] | Import statements |
| `filename` | string | Source .dfy file |
| `symbolic_name` | string | Declaration name |

## About Dafny

Dafny combines:
- Imperative programming (methods, loops)
- Functional programming (functions)
- Built-in verification (preconditions, postconditions, loop invariants)
- SMT-based automated proving (Z3)

## Creator

Charles Norton ([phanerozoic](https://huggingface.co/phanerozoic))