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# DataBack: Dataset of SAT Formulas and Backbone Variable Phases
## What is DataBack
`DataBack` is a dataset that consists of 120,286 SAT formulas (in CNF format), each labeled with the phases of its backbone variables.
`DataBack` contains two distinct subsets: the pre-training set, named `DataBack-PT`, and the fine-tuning set, named `DataBack-FT`, for pre-training and fine-tuning our `NeuroBack` model, respectively. To learn more about `NeuroBack` and `DataBack`, please refer to our [`NeuroBack paper`](https://arxiv.org/pdf/2110.14053.pdf).
The state-of-the-art backbone extractor, [`CadiBack`](https://github.com/arminbiere/cadiback), has been employed to extract the backbone variable phases. To learn more about `CadiBack`, please refer to the [`CadiBack paper`](https://wenxiwang.github.io/papers/cadiback.pdf).
## Directory Structure
```
|- original # Original CNF formulas and their backbone variable phases
| |- cnf_pt.tar.gz # CNF formulas for pre-training
| |- bb_pt.tar.gz # Backbone phases for pre-training formulas
| |- cnf_ft.tar.gz # CNF formulas for fine-tuning
| |- bb_ft.tar.gz # Backbone phases for fine-tuning formulas
|
|- dual # Dual CNF formulas and their backbone variable phases
| |- d_cnf_pt.tar.gz # Dual CNF formulas for pre-training
| |- d_bb_pt.tar.gz # Backbone phases for dual pre-training formulas
| |- d_cnf_ft.tar.gz # Dual CNF formulas for fine-tuning
| |- d_bb_ft.tar.gz # Backbone phases for dual fine-tuning formulas
```
## File Naming Convention
In the original directory, each CNF tar file (**`cnf_*.tar.gz`**) contains compressed CNF files named: **`[cnf_name].[compression_format]`**, where **`[compression_format]`** could be bz2, lzma, xz, gz, etc. Correspondingly, each backbone tar file (**`bb_*.tar.gz`**) comprises compressed backbone files named: **`[cnf_name].backbone.xz`**. It is important to note that a compressed CNF file will always share its **`[cnf_name]`** with its associated compressed backbone file.
For dual formulas and their corresponding backbone files, the naming convention remains consistent, but with an added **`d_`** prefix.
## Format of the Extracted Backbone File
The extracted backbone file (`*.backbone`) adheres to the output format of [`CadiBack`](https://github.com/arminbiere/cadiback).
## References
If you use `DataBack` in your research, please kindly cite the following papers.
[`NeuroBack paper`](https://arxiv.org/pdf/2110.14053.pdf):
```bib
@article{wang2023neuroback,
author = {Wang, Wenxi and
Hu, Yang and
Tiwari, Mohit and
Khurshid, Sarfraz and
McMillan, Kenneth L. and
Miikkulainen, Risto},
title = {NeuroBack: Improving CDCL SAT Solving using Graph Neural Networks},
journal={arXiv preprint arXiv:2110.14053},
year={2021}
}
```
[`CadiBack paper`](https://wenxiwang.github.io/papers/cadiback.pdf):
```bib
@inproceedings{biere2023cadiback,
title={CadiBack: Extracting Backbones with CaDiCaL},
author={Biere, Armin and Froleyks, Nils and Wang, Wenxi},
booktitle={26th International Conference on Theory and Applications of Satisfiability Testing (SAT 2023)},
year={2023},
organization={Schloss Dagstuhl-Leibniz-Zentrum f{\"u}r Informatik}
}
```
## Contributors
Wenxi Wang ([email protected]), Yang Hu ([email protected])
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