2025/09/02 by Yongwei Yuan, Yuan, Yongwei, Z. Zhou +7
Computer Science · #Advanced Software Engineering Methodologies #FOS: Computer and information sciences #Logic, programming, and type systems #Programming Languages (cs.PL) #Software Engineering Research
paper · pdf · doi:10.48550/arxiv.2509.02428
openalex publication_date 2025/09/02 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We present a type-theoretic framework for reasoning about incorrectness in functional programs that interact with effectful, opaque library APIs. Our approach centers on traces -- temporally-ordered sequences of library API invocations -- which naturally characterize both the preconditions of individual APIs and their composite behavior. We represent these traces using symbolic regular expressions (SREs), enabling formal specification of incorrect abstract data type (ADT) behaviors across function boundaries. The core contribution is a novel type inference algorithm that operates modulo specified incorrectness properties and leverages the symbolic finite automata (SFAs) representations of regexes for compositional reasoning of traces. When the algorithm succeeds, the inferred types witness that an ADT implementation can exhibit some subset of the specified incorrect behaviors. This represents the first systematic approach to underapproximate reasoning against trace-based incorrectness specifications, enabling a new form of trace-guided compositional analysis.