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ISSTA 2021
Sun 11 - Sat 17 July 2021 Online
co-located with ECOOP and ISSTA 2021
Thu 15 Jul 2021 10:10 - 10:30 at ISSTA 2 - Session 10 (time band 3) Symbolic Execution 1 Chair(s): S├ębastien Bardin
Fri 16 Jul 2021 02:40 - 03:00 at ISSTA 2 - Session 14 (time band 2) Symbolic Execution 2 Chair(s): Martin Nowack

Array constraints are prevalent in analyzing a program with symbolic execution. Solving array constraints is challenging due to the complexity of the precise encoding for arrays. In this work, we propose to synergize symbolic execution and array constraint solving. Our method addresses the difficulties in solving array constraints with novel ideas. First, we propose a lightweight method for pre-checking the unsatisfiability of array constraints based on integer linear programming. Second, observing that encoding arrays at the byte-level introduces many redundant axioms that reduce the effectiveness of constraint solving, we propose type and interval aware axiom generation. Note that the type information of array variables is inferred by symbolic execution, whereas interval information is calculated through the above pre-checking step. We have implemented our methods based on KLEE and its underlying constraint solver STP and conducted large-scale experiments on 75 real-world programs. The experimental results show that our method effectively improves the efficiency of symbolic execution. Our method solves 182.56% more constraints and explores 277.56% more paths on average under the same time threshold.

Thu 15 Jul

Displayed time zone: Brussels, Copenhagen, Madrid, Paris change

09:10 - 10:50
Session 10 (time band 3) Symbolic Execution 1Technical Papers at ISSTA 2
Chair(s): S├ębastien Bardin CEA LIST, University Paris-Saclay
09:10
20m
Talk
Fuzzing SMT Solvers via Two-Dimensional Input Space Exploration
Technical Papers
Peisen Yao Hong Kong University of Science and Technology, Heqing Huang Hong Kong University of Science and Technology, Wensheng Tang Hong Kong University of Science and Technology, Qingkai Shi Purdue University, Rongxin Wu Xiamen University, Charles Zhang Hong Kong University of Science and Technology
DOI
09:30
20m
Talk
Boosting Symbolic Execution via Constraint Solving Time Prediction (Experience Paper)
Technical Papers
Sicheng Luo Fudan University, Hui Xu Fudan University, Yanxiang Bi Fudan University, Xin Wang Fudan University, Yangfan Zhou Fudan University
DOI File Attached
09:50
20m
Talk
Synthesize Solving Strategy for Symbolic Execution
Technical Papers
Zhenbang Chen National University of Defense Technology, Zehua Chen National University of Defense Technology, Ziqi Shuai National University of Defense Technology, Guofeng Zhang Hunan University, Weiyu Pan National University of Defense Technology, Yufeng Zhang Hunan University, Ji Wang National University of Defense Technology
DOI
10:10
20m
Talk
Type and Interval Aware Array Constraint Solving for Symbolic ExecutionACM SIGSOFT Distinguished Paper
Technical Papers
Ziqi Shuai National University of Defense Technology, Zhenbang Chen National University of Defense Technology, Yufeng Zhang Hunan University, Jun Sun Singapore Management University, Ji Wang National University of Defense Technology
DOI
10:30
20m
Talk
Grammar-Agnostic Symbolic Execution by Token Symbolization
Technical Papers
Weiyu Pan National University of Defense Technology, Zhenbang Chen National University of Defense Technology, Guofeng Zhang Hunan University, Yunlai Luo National University of Defense Technology, Yufeng Zhang Hunan University, Ji Wang National University of Defense Technology
DOI

Fri 16 Jul

Displayed time zone: Brussels, Copenhagen, Madrid, Paris change

02:00 - 03:20
Session 14 (time band 2) Symbolic Execution 2Technical Papers at ISSTA 2
Chair(s): Martin Nowack Imperial College London
02:00
20m
Talk
Fuzzing SMT Solvers via Two-Dimensional Input Space Exploration
Technical Papers
Peisen Yao Hong Kong University of Science and Technology, Heqing Huang Hong Kong University of Science and Technology, Wensheng Tang Hong Kong University of Science and Technology, Qingkai Shi Purdue University, Rongxin Wu Xiamen University, Charles Zhang Hong Kong University of Science and Technology
DOI
02:20
20m
Talk
Synthesize Solving Strategy for Symbolic Execution
Technical Papers
Zhenbang Chen National University of Defense Technology, Zehua Chen National University of Defense Technology, Ziqi Shuai National University of Defense Technology, Guofeng Zhang Hunan University, Weiyu Pan National University of Defense Technology, Yufeng Zhang Hunan University, Ji Wang National University of Defense Technology
DOI
02:40
20m
Talk
Type and Interval Aware Array Constraint Solving for Symbolic ExecutionACM SIGSOFT Distinguished Paper
Technical Papers
Ziqi Shuai National University of Defense Technology, Zhenbang Chen National University of Defense Technology, Yufeng Zhang Hunan University, Jun Sun Singapore Management University, Ji Wang National University of Defense Technology
DOI
03:00
20m
Talk
Grammar-Agnostic Symbolic Execution by Token Symbolization
Technical Papers
Weiyu Pan National University of Defense Technology, Zhenbang Chen National University of Defense Technology, Guofeng Zhang Hunan University, Yunlai Luo National University of Defense Technology, Yufeng Zhang Hunan University, Ji Wang National University of Defense Technology
DOI