human: Given a node-centered hypergraph: <hypergraph>, where nodes represent papers and hyperedges represent sets of papers co-cited by a source paper.

Details of the hypergraph:
Center node: "cpachecker a tool for configurable software verification"
  Abstract: Configurable software verification is a recent concept for expressing different program analysis and model checking approaches in one single formalism. This paper presents CPAchecker, a tool and framework that aims at easy integration of new verification components. Every abstract domain, together with the corresponding operations, is required to implement the interface of configurable program analysis (CPA). The main algorithm is configurable to perform a reachability analysis on arbitrary combinations of existing CPAs. The major design goal during the development was to provide a framework for developers that is flexible and easy to extend. We hope that researchers find it convenient and productive to implement new verification ideas and algorithms using this platform and that it advances the field by making it easier to perform practical experiments. The tool is implemented in Java and runs as command-line tool or as Eclipse plug-in. We evaluate the efficiency of our tool on benchmarks from the software model checker BLAST. The first released version of CPAchecker implements CPAs for predicate abstraction, octagon, and explicit-value domains. Binaries and the source code of CPAchecker are publicly available as free software.

Connected through hyperedge HE-1 (induced by source paper "proving differential privacy with shadow execution"):
  with members:
    - "property testing for differential privacy"
    - "ektelo a framework for defining differentially private computations"
    - "detecting violations of differential privacy"
    - "synthesizing coupling proofs of differential privacy"
    - "relational symbolic execution"
    - "renyi differential privacy"
    - "towards practical differential privacy for sql queries"
    - "lightdp towards automating differential privacy proofs"

Connected through hyperedge HE-2 (induced by source paper "safevm a safety verifier for ethereum smart contracts"):
  with members:
    - "exploiting the laws of order in smart contracts"
    - "finding the greedy prodigal and suicidal contracts at scale"
    - "ethir a framework for high level analysis of ethereum bytecode"
    - "online detection of effectively callback free objects with applications to smart contracts"
    - "gastap a gas analyzer for smart contracts"
    - "a semantic framework for the security analysis of ethereum smart contracts"
    - "vandal a scalable security analysis framework for smart contracts"
    - "securify practical security analysis of smart contracts"

Connected through hyperedge HE-3 (induced by source paper "compositional verification of heap manipulating programs through property guided learning"):
  with members:
    - "sling using dynamic analysis to infer program invariants in separation logic"
    - "concolic testing heap manipulating programs"
    - "enhancing symbolic execution of heap based programs with separation logic for test input generation"
    - "gated graph sequence neural networks"
    - "fully automated shape analysis based on forest automata"
    - "learning universally quantified invariants of linear data structures"
    - "the octagon abstract domain"

Connected through hyperedge HE-4 (induced by source paper "verification artifacts in cooperative verification survey and unifying component framework"):
  with members:
    - "model checker execution reports"
    - "abstraction driven concolic testing"

Connected through hyperedge HE-5 (induced by source paper "differentially testing soundness and precision of program analyzers"):
  with members:
    - "smt based model checking for recursive programs"
    - "formal verification of a c value analysis based on abstract interpretation"
    - "automatic abstraction in smt based unbounded software model checking"
    - "stratified static analysis based on variable dependencies"
    - "the octagon abstract domain"

Connected through hyperedge HE-6 (induced by source paper "towards efficient data flow test data generation"):
  with members:
    - "differentially testing soundness and precision of program analyzers"
    - "time to clean your test objectives"
    - "smartunit empirical evaluations for automated unit testing of embedded software in industry"
    - "abstraction driven concolic testing"

Connected through hyperedge HE-7 (induced by source paper "lazy abstraction based controller synthesis"):
  with members:
    - "lazy abstraction based control for safety specifications"
    - "nonuniform abstractions refinement and controller synthesis with novel bdd encodings"
    - "sparsity aware finite abstraction"
    - "lazy abstractions for timed automata"

Connected through hyperedge HE-8 (induced by source paper "translating xd c programs to msvl programs"):
  with members:
    - "t2 temporal property verification"
    - "software model checking via large block encoding"
    - "mechanized semantics for the clight subset of the c language"

Question: Please tell me which class the center node belongs to. The 40 classes are: cs.NA(Numerical Analysis), cs.MM(Multimedia), cs.LO(Logic in Computer Science), cs.CY(Computers and Society), cs.CR(Cryptography and Security), cs.DC(Distributed, Parallel, and Cluster Computing), cs.HC(Human-Computer Interaction), cs.CE(Computational Engineering, Finance, and Science), cs.NI(Networking and Internet Architecture), cs.CC(Computational Complexity), cs.AI(Artificial Intelligence), cs.MA(Multiagent Systems), cs.GL(General Literature), cs.NE(Neural and Evolutionary Computing), cs.SC(Symbolic Computation), cs.AR(Hardware Architecture), cs.CV(Computer Vision and Pattern Recognition), cs.GR(Graphics), cs.ET(Emerging Technologies), cs.SY(Systems and Control), cs.CG(Computational Geometry), cs.OH(Other Computer Science), cs.PL(Programming Languages), cs.SE(Software Engineering), cs.LG(Machine Learning), cs.SD(Sound), cs.SI(Social and Information Networks), cs.RO(Robotics), cs.IT(Information Theory), cs.PF(Performance), cs.CL(Computation and Language), cs.IR(Information Retrieval), cs.MS(Mathematical Software), cs.FL(Formal Languages and Automata Theory), cs.DS(Data Structures and Algorithms), cs.OS(Operating Systems), cs.GT(Computer Science and Game Theory), cs.DB(Databases), cs.DL(Digital Libraries), cs.DM(Discrete Mathematics). Directly output the class name.

gpt: cs.PL(Programming Languages)