---
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configs:
- config_name: predrule-IMP-K-mk-human-written
  data_files:
  - split: train
    path: predrule-IMP-K-mk-human-written/train-*
- config_name: predrule-IMP-K-uk-human-written
  data_files:
  - split: train
    path: predrule-IMP-K-uk-human-written/train-*
- config_name: predrule-IMP-SOS-mk-human-written
  data_files:
  - split: train
    path: predrule-IMP-SOS-mk-human-written/train-*
- config_name: predrule-IMP-SOS-uk-human-written
  data_files:
  - split: train
    path: predrule-IMP-SOS-uk-human-written/train-*
- config_name: predstate-IMP-K-mk-fuzzer-generated
  data_files:
  - split: train
    path: predstate-IMP-K-mk-fuzzer-generated/train-*
- config_name: predstate-IMP-K-mk-human-written
  data_files:
  - split: train
    path: predstate-IMP-K-mk-human-written/train-*
- config_name: predstate-IMP-K-mk-llm-translated
  data_files:
  - split: train
    path: predstate-IMP-K-mk-llm-translated/train-*
- config_name: predstate-IMP-K-uk-fuzzer-generated
  data_files:
  - split: train
    path: predstate-IMP-K-uk-fuzzer-generated/train-*
- config_name: predstate-IMP-K-uk-human-written
  data_files:
  - split: train
    path: predstate-IMP-K-uk-human-written/train-*
- config_name: predstate-IMP-K-uk-llm-translated
  data_files:
  - split: train
    path: predstate-IMP-K-uk-llm-translated/train-*
- config_name: predstate-IMP-SOS-mk-fuzzer-generated
  data_files:
  - split: train
    path: predstate-IMP-SOS-mk-fuzzer-generated/train-*
- config_name: predstate-IMP-SOS-mk-human-written
  data_files:
  - split: train
    path: predstate-IMP-SOS-mk-human-written/train-*
- config_name: predstate-IMP-SOS-mk-llm-translated
  data_files:
  - split: train
    path: predstate-IMP-SOS-mk-llm-translated/train-*
- config_name: predstate-IMP-SOS-uk-fuzzer-generated
  data_files:
  - split: train
    path: predstate-IMP-SOS-uk-fuzzer-generated/train-*
- config_name: predstate-IMP-SOS-uk-human-written
  data_files:
  - split: train
    path: predstate-IMP-SOS-uk-human-written/train-*
- config_name: predstate-IMP-SOS-uk-llm-translated
  data_files:
  - split: train
    path: predstate-IMP-SOS-uk-llm-translated/train-*
- config_name: predstate-IMP-nk-fuzzer-generated
  data_files:
  - split: train
    path: predstate-IMP-nk-fuzzer-generated/train-*
- config_name: predstate-IMP-nk-human-written
  data_files:
  - split: train
    path: predstate-IMP-nk-human-written/train-*
- config_name: predstate-IMP-nk-llm-translated
  data_files:
  - split: train
    path: predstate-IMP-nk-llm-translated/train-*
- config_name: predtrace-IMP-K-mk-human-written
  data_files:
  - split: train
    path: predtrace-IMP-K-mk-human-written/train-*
- config_name: predtrace-IMP-K-uk-human-written
  data_files:
  - split: train
    path: predtrace-IMP-K-uk-human-written/train-*
- config_name: predtrace-IMP-SOS-mk-human-written
  data_files:
  - split: train
    path: predtrace-IMP-SOS-mk-human-written/train-*
- config_name: predtrace-IMP-SOS-uk-human-written
  data_files:
  - split: train
    path: predtrace-IMP-SOS-uk-human-written/train-*
---

# PLSemanticsBench

## Table of Contents
- [About](#about)
- [Installation](#installation)
- [Quick Start](#quick-start)
- [Detailed Usage](#detailed-usage)
- [Benchmark](#benchmark)
- [Citation](#citation)

## About
PLSemanticsBench is the first benchmark for evaluating LLMs as programming language interpreters. We introduce three tasks to evaluate this:

| Task | Description |
|------|-------------|
| ✨ **PredState**| Predicts the final program state |
| ✨ **PredRule** | Predicts the ordered sequence of semantic rules needed to evaluate a program|
| ✨ **PredTrace**| Predicts the step-by-step execution of a program |

You must implement [BaseRunner](https://github.com/EngineeringSoftware/PLSemanticsBench/blob/main/src/plsemanticsbench/core/exps/base_experiment.py)(`_query` method) to evaluate your models. We provide two example implementations for OpenAI models ([GPTRunner](https://github.com/EngineeringSoftware/PLSemanticsBench/blob/main/src/plsemanticsbench/core/exps/gpt_experiment.py)) and Ollama models ([OllamaRunner](https://github.com/EngineeringSoftware/PLSemanticsBench/blob/main/src/plsemanticsbench/core/exps/ollama_experiment.py)).

## Installation

### System Requirements
- Python 3.11 or higher
- OpenAI API key (for running experiments with OpenAI models)


### Step-by-Step Installation
1. Create and activate the conda environment:
```bash
conda env create -f env.yaml
conda activate plsemanticsbench
```

2. Set up your OpenAI API key (only for OpenAI models):
```bash
export OPENAI_API_KEY='your-api-key-here'
```

## Quick Start

We provide a bash script `quick` that:
 1. Sets up the `plsemanticsbench` conda environment.
 2. Pulls the `DeepSeek-R1 1.5B` model.
 3. Evaluates the `DeepSeek-R1 1.5B` model on the `PredState` task with `no-semantics` and `chain-of-thought` prompting on the `Human-Written` dataset.
 4. Prints the `accuracy` and `malformed-count` to screen.
 5. Creates `metrics-predstate-deepseek-r1:1.5b.json` that contains the evaluation result.
 
```bash
bash quick
```

## Detailed Usage

### Basic Example
Here's a minimal example to get started:

```python
from plsemanticsbench import GPTRunner
from plsemanticsbench import ExperimentArgs, LLMEvaluator
from plsemanticsbench import (
    PROMPT_STRATEGY,
    Task,
    Formalization,
    Semantics_Type,
    Language,
    PLDataset
)

# Model name
model_name = "o3-mini"

# Experiment args: Run the PredState task on the IMP language with
# standard semantics formalized using SOS and with direct prompting
exp_args = ExperimentArgs(
    dataset=PLDataset.Human_Written,
    task=Task.PredState,
    language=Language.IMP,
    formalization=Formalization.SOS,
    semantics_type=Semantics_Type.Standard,
    model_name=model_name,
    prompt_strategy=PROMPT_STRATEGY.DA,
    num_datapoints_to_run=2, # Run just 2 datapoints (omit to run entire dataset)
)
                        
# Run inference using the OpenAI API
gpt_runner = GPTRunner(args=exp_args)

# Generation (generate LLM prediction on the predstate task)
predictions = gpt_runner.do_experiment() # path to dump results can be provided

# Evaluation (evaluate LLM prediction against ground-truth)
llm_eval = LLMEvaluator(task=exp_args.task, semantics_type=exp_args.semantics_type)
evaluation_result = llm_eval.evaluate_from_list(results=predictions, model_name=model_name)
print(evaluation_result)
```

### Expected Output

```python
{
    'accuracy': 1,
    'malformed-count': 0,
}
```

## Benchmark

You can load the dataset using the `datasets` library. Here is an example:
```python
from datasets import load_dataset

# Load PredState task with standard semantics (uk) and K-semantics formalization (K) and with the Human Written (human-written) dataset
predstate_IMP_K_uk_human_written = load_dataset("EngineeringSoftware/PLSemanticsBench", name="predstate-IMP-K-uk-human-written")

# Load PredRule task with nonstandard semantics (mk) ans SOS formalization (SOS) and with the LLM Translated (llm-translated) dataset
predrule_IMP_SOS_mk_llm_translated = load_dataset("EngineeringSoftware/PLSemanticsBench", name="predrule-IMP-SOS-mk-llm-translated")

# Load PredState task with no-semantics (nk) and with the Fuzzer Generated (fuzzer-generated) dataset
predstate_IMP_nk_fuzzer_generated = load_dataset("EngineeringSoftware/PLSemanticsBench", name="predstate-IMP-nk-fuzzer-generated")
```

### Dataset Split

<table>
  <tr>
    <th>Task</th>
    <th>Split</th>
    <th>Description</th>
  </tr>
  <tr>
    <td rowspan="5">✨ <strong>PredState</strong><br>(Final State Prediction)</td>
    <td> predstate-IMP-nk-{dataset-name} </td>
    <td> No semantics </td>
  </tr>
  <tr>
    <td> predstate-IMP-K-uk-{dataset-name} </td>
    <td>Standard semantics with K-semantics formalization</td>
  </tr>
  <tr>
    <td> predstate-IMP-K-mk-{dataset-name} </td>
    <td>Nonstandard semantics with K-semantics formalization</td>
  </tr>
  <tr>
    <td> predstate-IMP-SOS-uk-{dataset-name} </td>
    <td>Standard semantics with SOS formalization</td>
  </tr>
  <tr>
    <td> predstate-IMP-SOS-mk-{dataset-name} </td>
    <td>Nonstandard semantics with SOS formalization</td>
  </tr>
  <tr>
    <td rowspan="4">✨ <strong>PredRule</strong><br>(Semantic Rule Prediction)</td>
    <td> predrule-IMP-K-uk-human-written </td>
    <td>Standard semantics with K-semantics formalization</td>
  </tr>
  <tr>
    <td> predrule-IMP-K-mk-human-written </td>
    <td>Nonstandard semantics with K-semantics formalization</td>
  </tr>
  <tr>
    <td> predrule-IMP-SOS-uk-human-written </td>
    <td>Standard semantics with SOS formalization</td>
  </tr>
  <tr>
    <td> predrule-IMP-SOS-mk-human-written </td>
    <td>Nonstandard semantics with SOS formalization</td>
  </tr>
  <tr>
    <td rowspan="4">✨ <strong>PredTrace</strong><br>(Execution Trace Prediction)</td>
    <td> predtrace-IMP-K-uk-human-written </td>
    <td>Standard semantics with K-semantics formalization</td>
  </tr>
  <tr>
    <td> predtrace-IMP-K-mk-human-written </td>
    <td>Nonstandard semantics with K-semantics formalization</td>
  </tr>
  <tr>
    <td> predtrace-IMP-SOS-uk-human-written </td>
    <td>Standard semantics with SOS formalization</td>
  </tr>
  <tr>
    <td> predtrace-IMP-SOS-mk-human-written </td>
    <td>Nonstandard semantics with SOS formalization</td>
  </tr>
</table>


### Data Example

One example of the dataset is as follows:
```json
{
  "program": "int ans; ans = 1; ...",
  "syntax": "<program> :: ...",
  "semantics": "ℤ := Set of integers ...",
  "mutated-program": "int ans; ans = 1; ...",
  "mutation-pattern": "KeyWordSwap",
  "exec-trace": [
    {
      "linenumber": 1,
      "rule": ["Rule 38", "Rule 39"],
      "state": {"ans": 1}
    }
  ],
  "ground-truth": "<answer>...</answer>"
}
```

## Citation
```bibtex
@article{ThimmaiahETAL25PLSemanticsBench,
  title={PLSemanticsBench: Large Language Models As Programming Language Interpreters},
  author={Aditya Thimmaiah, Jiyang Zhang, Jayanth Srinivasa, Junyi Jessy Li, Milos Gligoric},
  year={2025},
  archivePrefix={arXiv},
  url={https://arxiv.org/abs/2510.03415}, 
}
```


## License
This project is licensed under the [CC BY 4.0 License](https://creativecommons.org/licenses/by/4.0/).