Yingfei Xiong

Associate Professor with Tenure
Co-Appointed Research Professor
Programming Languages Lab (Vice Director)
Institute of Software （Vice Director)
School of Computer Science
Peking University

Distinguished Member of ACM, Member of IFIP WG 2.4, IEEE, CCF

Office: Room 1431, Science Building # 1, Yanyuan Campus / 447 Wende Building, Changping New Campus
Email: xiongyf@pku.edu.cn
Tel: +86-10-62757008-12

Pronunciation of my name: [i:ŋfei] (yingfei) [ʃiɔŋ] (xiong)

中文版

News (More)

February 20, 2025 I was selected as an ACM Distinguished Member for my contributions to program repair and synthesis.
July 10, 2024 I was elected as a member of IFIP WG2.4, the working group on software implementation technology.
June 24, 2024 We have released a benchmark for algorithm synthesis, ASAC, which consists of problems from Chinese national competitive programming contests. Compared with existing benchmarks, our benchmark is not only more difficult, but also consists of logic formalizations of the problems so that the logic-based synthesis and verification is possible. The paper will appear at the demo track of FSE'24 in the next month.
June 14, 2024 Proving Functional Program Equivalence via Directed Lemma Synthesis was accepted at FM'24. This study originates from the fact that the program synthesized by our algorithm synthesziers are too complex, and cannot be automatically verified by existing verifiers. This paper identifies that the key to the proof is find useful lemmas, and these lemmas can be then synthesized by program synthesizers. Therefore, our algorithm synthesizer can be used to verify its synthesized programs. The resulted system is 21 times faster than CVC4-Ind, the SOTA verifier.
April 1, 2024 Superfusion: Eliminating Intermediate Data Structures via Inductive Synthesis was accepted at PLDI'24. In this paper, we generalize the previous AutoLifter approach into Superfusion that optimizes programs by eliminating intermediate data structures, automating the fusion procedure in functional programming. The implemented system, SuFu, not only achieves comparable performance to AutoLifter on D&C-like algorithm synthesis problems, but also significantly outperforms existing approaches on fusion optimization and structural recursive program synthesis problems.

Education & Employment

04/2012~07/2018, Peking University, Research Professor in Young Talents Plan (Tenure-Track Assistant Professor Equivalence)
12/2009~11/2011, University of Waterloo, PostDoc. Advisor: Krzysztof Czarnecki
10/2006~09/2009, The University of Tokyo, Ph.D. Advisors: Zhenjiang Hu Masato Takeichi
09/2004~09/2006, Peking University, Pre-Ph.D. Course. Advisors: Hong Mei Fuqing Yang
09/2000~06/2004, University of Electronic Science and Technology of China, Bachelor Diploma of Computer Science

Current Research Projects

Algorithm Synthesis

Benchmark: [FSE24DEMO]
Synthesis: [PLDI24][TOPLAS24][OOPSLA23b]
Verification: [FM24]

Program Repair / Synthesis
- Perspective & Empirical Studies: [SCIS19a][SCIS19b]
- Defining a search space: [FSE21b][ASE19a][ISSTA18a][ASE15]
- Locating likely elements in a space: [OOPSLA23a][TOSEM22][OOPSLA21][OOPSLA20][GI18][ICSE18a][ICSE17a]
- Interaction: [ICSME21][PLDI20][ISSRE19]
- Validation & Patch Generation: [TSE24][ASE23Demo][ASE21][ISSTA17][Interwa17]
- Specific Bug Types: [ASE23][ICSE15a]
Fault Localization: [ICSE22a][FSE21a][TSE19][ASE19c]
Efficient Program Analysis: [ASE21][SAS21][IJCAI20][ESOP17][ISSTA17]
Analyzing Floating-Point and Deep Learning Programs: [ICSE23b][FSE20][OOPSLA22][POPL20][ISSTA18b][FSE16][ICSE15b][ASE14]

Recent Selected Publications

[Complete List | Invited Talks | DBLP | Google Scholar]

[FSE24DEMO]	Zhao Zhang, Yican Sun, Ruyi Ji, Siyuan Li, Xuanyu Peng, Zhechong Huang, Sizhe Li, Tianran Zhu, Yingfei Xiong^. ASAC: A Benchmark for Algorithm Synthesis*. FSE'24-Demo: The ACM International Conference on the Foundations of Software Engineering, Tool Demonstration Track, September 2024. [Paper]
[FM24]	Yican Sun, Ruyi Ji, Jian Fang, Xuanlin Jiang, Mingshuai Chen, Yingfei Xiong^. Proving Functional Program Equivalence via Directed Lemma Synthesis*. FM'24: 26th International Symposium on Formal Methods, September 2024. [Paper]
[PLDI24]	Ruyi Ji, Yuwei Zhao, Nadia Polikarpova, Yingfei Xiong^, Zhenjiang Hu. Superfusion: Eliminating Intermediate Data Structures via Inductive Synthesis*. PLDI'24: ACM SIGPLAN Conference on Programming Language Design and Implementation, June 2024. [Paper][Online Demo]
[ICSE24]	Qihao Zhu, Qingyuan Liang, Zeyu Sun, Yingfei Xiong^, Lu Zhang, Shengyu Cheng. GrammarT5: Grammar-Integrated Pretrained Encoder-Decoder Neural Model for Code*. ICSE'24: 46th International Conference on Software Engineering, April 2024. [Paper]
[arXiv24]	Daya Guo^#, Qihao Zhu^#, Dejian Yang, Zhenda Xie, Kai Dong, Wentao Zhang, Guanting Chen, Xiao Bi, Y. Wu, Y.K. Li, Fuli Luo, Yingfei Xiong, Wenfeng Liang. DeepSeek-Coder: When the Large Language Model Meets Programming - The Rise of Code Intelligence. arXiv:2401.14196, January 2024. [Paper]
[TSE24]	Yuanan Xiao, Chenyang Yang, Bo Wang, Yingfei Xiong^. Accelerating Patch Validation for Program Repair with Interception-Based Execution Scheduling*. TSE: IEEE Transactions on Software Engineering, Online First, January 2024. [Paper]
[TOPLAS24]	Ruyi Ji, Yuwei Zhao, Yingfei Xiong^, Di Wang, Lu Zhang, Zhenjiang Hu. Decomposition-Based Synthesis for Applying D&C-Like Algorithmic Paradigms*. TOPLAS: ACM Transactions on Programming Languages and Systems, Accepted, January 2024. [Paper]
[OOPSLA23b]	Yican Sun, Xuanyu Peng, Yingfei Xiong^. Synthesizing Efficient Memoization Algorithms*. OOPSLA'23: Object-Oriented Programming, Systems, Languages and Applications, October 2023. [Paper]
[OOPSLA23a]	Ruyi Ji, Chaozhe Kong, Yingfei Xiong^, Zhenjiang Hu. Improving Oracle-Guided Inductive Synthesis by Efficient Question Selection*. OOPSLA'23: Object-Oriented Programming, Systems, Languages and Applications, October 2023. [Paper]
[ISSRE23]	Guancheng Wang, Yiqian Wu, Qihao Zhu, Yingfei Xiong^, Xin Zhang, Lu Zhang. A Probabilistic Delta Debugging Approach for Abstract Syntax Trees*. ISSRE'23: the 34th IEEE International Symposium on Software Reliability Engineering, September 2023. [Paper]

Teaching

Software Analysis: Fall 2024, Fall 2023, Fall 2022, Fall 2021, Fall 2020, Fall 2019, Fall 2018, Fall 2017, Fall 2016, Fall 2015, Fall 2014
- Course Video of 2020
Software Foundations: Spring 2025, Spring 2024, Spring 2023, Spring 2022, Spring 2021
Design Principles of Programming Languages: Spring 2021, Spring 2020, Spring 2019, Spring 2018, Spring 2017, Spring 2016, Spring 2015, Spring 2014
Introduction to Computer Systems, Discussion Seminar: Fall 2019, Fall 2018, Fall 2017, Fall 2016, Fall 2015, Fall 2014, Fall 2013, Fall 2012
Algorithm Design and Analysis, Discussion Seminar: Spring 2014, Spring 2013

Academic and Department Service

2026, Selection Committee Member: SIGSOFT Summer/Winter School funding program
2026, Associate Chair: OOPSLA 2026
2025, PC Member: ASE 2025 Journal-First Track
2025, Area Chair: ASE 2025
2025, PC Member: ICSE 2026
2024, PC Member: LLM4Code 2025
2024, Mentor Chair: ICSE 2025 Shadow PC Track
2024, PC Member: SETTA 2024
2024, Track Co-Chair: The 9th National Conference on Formal Methods and Applications (FMAC) / Chinasoft Formal Methods and Applications Track
2024, Review Committee Member: OOPSLA 2024
More...

More About Me

Awards, Honors, and Grants
Students
My Free/Busy Information: [HTML] [ICS]
Past Research Projects
- Compiler Testing: [ASE19b][TSE18][ICSE17b][ICSE16][ICST16b][CSUR19][SCIS19c]
- Program Transformation for API migration: [ECOOP16][PEPM15][ICWS13]
- Configuration Error Repair: [TSE15][ICSE12][SPLC13]
- Delta-Based Bidirectional Transformation (Postdoctoral Period)
- Heterogeneous Data Synchronization in Software Engineering (Doctoral Period)
  - Beanbag: OCL-lik Language for On-Site Synchronization
  - SyncATL: Model Synchronization using ATL
- Aspect-Oriented Intermediate Language (Undergraduate Period)