This is the official repository of the paper accepted by COLM25: FormaRL: Enhancing Autoformalization with no Labeled Data.

Camera ready version of this paper and code implementation are coming soon.

Here is the training code used in our project.

To start training with FormaRL, we need to firstly setup both python and lean environments. We will need at least 2xA100-80G GPU to train a large language model with 7B parameters.

Before installing the dependencies you should make sure you have created a new virtual environment for this project with python 3.12. Then you can directly run the following commands to install required packages.

pip install -r requirements.txt

Our training loop is primarily powered by trl and accelerate. You may need to manually run accelerate config to enable more optimizations in distributed training.

Moreover, if you need to use a remote model for consistency check with a openai-compatible API, you will need to create a .env file at the root folder of this project with these required information:

OPENAI_API_KEY=<your_api_key>
OPENAI_BASE_URL=<your_api_base_url/v1>

And pass --remote argument when you run these scripts.

We used Lean and mathlib4 of version v4.21.0 in this training code. After you have cloned this repository, you need to run

git submodule init && git submodule update

to obtain the required version of mathlib4. Then you should add these dependencies to mathlib4/lakefile.lean

require Cli from git "https://github.com/leanprover/lean4-cli" @ "v4.21.0"
require REPL from git "https://github.com/leanprover-community/repl.git" @ "v4.21.0"

We requires the repl capability of lean in syntax check. Then you can build mathlib4 with

lake exe cache get
lake build

To reproduce the major experimental results in this paper, you can simply run this command

accelerate launch frl.py -c configs/grpo-coldstart.yaml -m Qwen/Qwen-2.5-Coder-7B --eval_model deepseek-v3 --save_path logs/ --remote

For more options and hyperparameters in this project, you can refer to definitions in frl.py and config files in configs folder for more information.