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Future Blog Post

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This post will show up by default. To disable scheduling of future posts, edit config.yml and set future: false.

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Blog Post number 1

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We are hiring! Please take a look at our Vacancies page for openings.

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publications

Agentic Concolic Execution

Published in IEEE Symposium on Security and Privacy, 2026

Concolic execution is a practical test generation technique that explores execution paths by coupling concrete execution with symbolic reasoning. It runs programs on given inputs while capturing symbolic path representations, then mutates and solves these constraints to generate new test inputs for alternative paths. This approach has several fundamental challenges, such as (C1) the inherent complexity of symbolically modeling diverse programming language constructs and environmental interactions, and (C2) the scalability issues of constraint solvers when handling large, complex formulas. In this work, we investigate whether LLM agents can help address these longstanding challenges in test generation. We propose a novel workflow which we call agentic concolic execution. Using an LLM agent for symbolization, our approach is language-agnostic and can handle environmental constraints without additional manual modeling effort. To ease pressure on the constraint solver, we allow an LLM agent to summarize and even reason about constraints directly in natural language. In a significant evaluation of 12 real-world subjects, our research prototype ConcoLLMic attains significantly higher code coverage (115%-233% higher) than state-of-the-art symbolic executors like KLEE that have been painstakingly hand-crafted over many years, and identifies 11 new vulnerabilities. Our results show that multi-step planning and tool integration enable agents to effectively mitigate reliability issues inherent in LLM-based analysis and even reason symbolically about code.

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talks

vacancies

PhD Positions

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We have several PhD positions available to work on exciting topics as part of the AI for Program Reasoning program. These positions start in August 2026 and are based at NUS.

Postdoc Positions

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We have a large number of posdoc positions available to work on exciting topics as part of the AI for Program Reasoning program. Start dates throughout 2026.

Program Manager

Published:

We are looking for a senior postdoctoral researchers to assume the exciting role of Program Manager for the AI for Program Reasoning project. This is a scientific role, but with significant leadership duties.