Slicing Concurrent Constraint Programs

  • Moreno FalaschiEmail author
  • Maurizio Gabbrielli
  • Carlos Olarte
  • Catuscia Palamidessi
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 10184)


Concurrent Constraint Programming (CCP) is a declarative model for concurrency where agents interact by telling and asking constraints (pieces of information) in a shared store. Some previous works have developed (approximated) declarative debuggers for CCP languages. However, the task of debugging concurrent programs remains difficult. In this paper we define a dynamic slicer for CCP and we show it to be a useful companion tool for the existing debugging techniques. We start with a partial computation (a trace) that shows the presence of bugs. Often, the quantity of information in such a trace is overwhelming, and the user gets easily lost, since she cannot focus on the sources of the bugs. Our slicer allows for marking part of the state of the computation and assists the user to eliminate most of the redundant information in order to highlight the errors. We show that this technique can be tailored to timed variants of CCP. We also develop a prototypical implementation freely available for making experiments.


Concurrent Constraint Programming Program slicing Debugging 



We thank the anonymous reviewers for their detailed comments and suggestions which helped us to improve our paper. The work of Olarte was funded by CNPq and CAPES (Brazil). The work of Palamidessi and Olarte was supported by the Regional Program STIC AMSUD “EPIC: EPistemic Interactive Concurrency”.


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Copyright information

© Springer International Publishing AG 2017

Authors and Affiliations

  • Moreno Falaschi
    • 1
    Email author
  • Maurizio Gabbrielli
    • 2
  • Carlos Olarte
    • 3
  • Catuscia Palamidessi
    • 4
  1. 1.Dipartimento di Ingegneria dell’Informazione e Scienze MatematicheUniversità di SienaSienaItaly
  2. 2.Dipartimento di Informatica - Scienza e IngegneriaUniversità di BolognaBolognaItaly
  3. 3.ECTUniversidade Federal do Rio Grande do NorteNatalBrazil
  4. 4.INRIA and LIX, École PolytechniquePalaiseauFrance

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