Author

Yundi Xu

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#small language model Book Open access Aug 2026

Invariant Pretraining for Robust Code Representations

InvPT applies semantic-preserving transformations to the corpus and combines masked language modeling with multi-positive supervised contrastive learning that treats all augmentations of the same source function as positives, mixing self-contrast pairs with invariant-contrast pairs for positives of varying difficulty.

Yifeng He, Yun-Di Xu, Christopher Castro Gaw Gonzalo et al. · Proceedings of the 2nd ACM S... · 0 citations

Jul 2026

LLM-Based Invariant Testing for Software Functional Bugs

LISA iteratively generates API sequences and program invariants guided by API n-gram feedback, achieving higher bug-detection rates and competitive code coverage compared with both fuzzing and prior LLM-based test generation approaches, and reporting each finding as a high-confidence bug candidate for developer confirm...

Ruogu Yang, Yifeng He, Yundi Xu et al. · arXiv.org · 0 citations