Blog Archives

DySDoc3 – DynaDoc: Automated On-Demand Context-Specific Documentation

Abstract: This 2018 DOCGEN Challenge paper describes DynaDoc, an automated documentation system for on-demand context-specific documentation. A key novelty is the use of graph database technology with an eXtensible Common Software Graph Schema (XCSG). Using XCSG-based query language, DynaDoc can mine efficiently and accurately a variety of program artifacts and graph abstractions from millions of […]

Categories: Papers, Upcoming

Science of Computer Programming – Projected Control Graph for Computing Relevant Program Behaviors

Abstract: Many software engineering tasks require analysis and verification of all behaviors relevant to the task. For example, all relevant behaviors must be analyzed to verify a safety or security property. An efficient algorithm must compute the relevant behaviors directly without computing all the behaviors. This is crucial in practice because it is computationally intractable […]

Categories: Papers, Upcoming

Springer Verlag Publishers – Catastrophic Cyber-Physical Malware

Abstract: With the advent of highly sophisticated cyber-physical malware (CPM) such as Industroyer, a cyberattack could be as destructive as the terrorist attack on 9/11, it would virtually paralyze the nation. We discuss as the major risks the vulnerability of: telecommunication infrastructure, industrial control systems (ICS), and mission-critical software. In differentiating CPM from traditional malware, […]

Categories: Book Chapters

ICSE 2018 – COMB: Computing Relevant Program Behaviors

Abstract: The paper presents COMB, a tool to improve accuracy and efficiency of software engineering tasks that hinge on computing all relevant program behaviors. Computing all behaviors and selecting the relevant ones is computationally intractable. COMB uses Projected Control Graph (PCG) abstraction to derive the relevant behaviors directly and efficiently. The PCG is important as […]

Categories: Papers

2017 Winter Simulation Conference – Modeling Lessons from Verifying Large Software Systems for Safety and Security

Abstract: Verifying software in mission-critical Cyber-Physical Systems (CPS) is an important but daunting task with challenges of accuracy and scalability. This paper discusses lessons learned from verifying properties of the Linux kernel. These lessons have raised questions about traditional verification approaches, and have led us to a model-based approach for software verification. These models are […]

Categories: Papers

APSEC 2016 – Projected Control Graph for Accurate and Efficient Analysis of Safety and Security Vulnerabilities

Abstract: The goal of path-sensitive analysis (PSA) is to achieve accuracy by accounting precisely for the execution behavior along each path of a control flow graph (CFG). A practical adoption of PSA is hampered by two roadblocks: (a) the exponential growth of the number of CFG paths, and (b) the exponential complexity of a path […]

Categories: Papers

FVPE 2016 – Insights for Practicing Engineers from a Formal Verification Study of the Linux Kernel

Abstract: Formal verification of large software has been an illusive target, riddled with the problem of scalability. Even if the obstacle of scale may be cleared, major challenges remain to adopt formal verification in practice. This paper presents an empirical study using a top-rated formal verification tool for Linux, and draws insights from the study […]

Categories: Papers

ICSE 2016 – Let’s Verify Linux: Accelerated Learning of Analytical Reasoning through Automation and Collaboration

Abstract: We describe our experiences in the classroom using the internet to collaboratively verify a significant safety and security property across the entire Linux kernel. With 66,609 instances to check across three versions of Linux, the naive approach of simply dividing up the code and assigning it to students does not scale, and does little […]

Categories: Papers

ICPC 2016 – Human-Machine Resolution of Invisible Control Flow

Abstract: Invisible Control Flow (ICF) results from dynamic binding and asynchronous processing. For modern software replete with ICF, the ability to analyze and resolve ICF is crucial for verifying software. A fully automated analysis to resolve ICF suffers from imprecision and high computational complexity. As a practical alternative, we present a novel solution of interactive […]

Categories: Papers

ICSE 2016 – Rethinking Verification: Accuracy, Efficiency and Scalability through Human-Machine Collaboration

Abstract: With growing dependence on software in embedded and cyber-physical systems where vulnerabilities and malware can lead to disasters, efficient and accurate verification has become a crucial need for safety and cybersecurity. Formal verification of large software has remained an elusive target, riddled with problems of low accuracy and high computational complexity. The need for […]

Categories: Papers