Ponències/Comunicacions de congressos

Recent Submissions

  • Decision levels are stable: towards better SAT heuristics 

    Nieuwenhuis, Robert Lukas Mario; Lozano Navarro, Adrián; Oliveras Llunell, Albert; Rodríguez Carbonell, Enric (EasyChair Publications, 2020)
    Conference report
    Restricted access - publisher's policy
    We shed new light on the Literal Block Distance (LBD) and glue-based heuristics used in current SAT solvers. For this, we first introduce the concept of stickiness: given a run of a CDCL SAT solver, for each pair of literals ...

  • Augmenting the power of (partial) MaxSat resolution with extension 

    Larrosa Bondia, Francisco Javier; Rollón Rico, Emma (AAAI Press, 2020)
    Conference lecture
    Restricted access - publisher's policy
    The refutation power of SAT and MaxSAT resolution is challenged by problems like the soft and hard Pigeon Hole Problem PHP for which short refutations do not exist. In this paper we augment the MaxSAT resolution proof ...

  • Proving termination through conditional termination 

    Borralleras Andreu, Cristina; Brockschmidt, Marc; Larraz Hurtado, Daniel; Oliveras Llunell, Albert; Rodríguez Carbonell, Enric; Rubio Gimeno, Alberto (Springer, 2017)
    Conference report
    Open Access
    We present a constraint-based method for proving conditional termination of integer programs. Building on this, we construct a framework to prove (unconditional) program termination using a powerful mechanism to combine ...

  • Ordocoordinación: cómo organizar 700 estudiantes en un nuevo campus (y no morir en el intento) 

    Castro Rabal, Jorge; Farreres de la Morena, Xavier; Gabarró Vallès, Joaquim; Nivela Alós, M. Pilar Brígida; Pérez Poch, Antoni; Pino Blanco, Elvira; Rivero Almeida, José Miguel (Asociación de Enseñantes Universitarios de la Informática (AENUI), 2018)
    Conference report
    Open Access
    Since Autumn Term 2017 the Department of Computer Science of the Universitat Politecnica de Catalunya UPC-BarcelonaTech is in charge of teaching ”Fundamentals of Programming” in the new DiagonalBeso ´s Campus, at EEBE ...

  • Anotaciones de Merlín, comportamiento de universos y semántica algebraica 

    Nivela Alós, M. Pilar Brígida; Orejas Valdés, Fernando (E.T.S.I. de Telecomunicación, 1985)
    Conference report
    Open Access
    En este trabajo se presentan las ideas básicas seguidas para el diseño de un lenguaje de anotaciones para el lenguaje de programación Merlín. En concreto, las anotaciones se prevén en forma de especificaciones ecuacionales ...

  • Speeding up the constraint-based method in difference logic 

    Candeago, L.; Larraz Hurtado, Daniel; Oliveras Llunell, Albert; Rodríguez Carbonell, Enric; Rubio Gimeno, Alberto (2016)
    Conference report
    Open Access
    Over the years the constraint-based method has been successfully applied to a wide range of problems in program analysis, from invariant generation to termination and non-termination proving. Quite often the semantics of ...

  • Look-ahead with mini-bucket heuristics for MPE 

    Dechter, Rina; Kask, Kalev; Lam, William; Larrosa Bondia, Francisco Javier (AAAI Press (Association for the Advancement of Artificial Intelligence), 2016)
    Conference lecture
    Open Access
    The paper investigates the potential of look-ahead in the con-text of AND/OR search in graphical models using the Mini-Bucket heuristic for combinatorial optimization tasks (e.g., MAP/MPE or weighted CSPs). We present and ...

  • Limited discrepancy AND/OR search and its application to optimization tasks in graphical models 

    Larrosa Bondia, Francisco Javier; Rollón Rico, Emma; Dechter, Rina (AAAI Press (Association for the Advancement of Artificial Intelligence), 2016)
    Conference report
    Open Access
    Many combinatorial problems are solved with a Depth-First search (DFS) guided by a heuristic and it is well-known that this method is very fragile with respect to heuristic mistakes. One standard way to make DFS more robust ...

  • Compositional safety verification with Max-SMT 

    Brockschmidt, Marc; Larraz Hurtado, Daniel; Oliveras Llunell, Albert; Rodríguez Carbonell, Enric; Rubio Gimeno, Alberto (2015)
    Conference report
    Open Access
    We present an automated compositional program verification technique for safety properties based on conditional inductive invariants. For a given program part (e.g., a single loop) and a postcondition, we show how to, using ...

  • Termination competition (termCOMP 2015) 

    Giesl, Jürgen; Mesnard, Frédéric; Rubio Gimeno, Alberto; Thiemann, René; Waldmann, Johannes (Springer, 2015)
    Conference report
    Open Access
    The termination competition focuses on automated termination analysis for all kinds of programming paradigms, including categories for term rewriting, imperative programming, logic programming, and functional programming. ...

  • The fractal dimension of SAT formulas 

    Ansótegui Gil, Carlos; Bonet Carbonell, M. Luisa; Giráldez Crú, Jesús; Levy Díaz, Jordi (Springer, 2014)
    Conference report
    Restricted access - publisher's policy
    Modern SAT solvers have experienced a remarkable progress on solving industrial instances. Most of the techniques have been developed after an intensive experimental process. It is believed that these techniques exploit ...

  • Decomposing utility functions in Bounded Max-Sum for distributed constraint optimization 

    Rollón Rico, Emma; Larrosa Bondia, Francisco Javier (Springer, 2014)
    Conference report
    Open Access
    Bounded Max-Sum is a message-passing algorithm for solving distributed Constraint Optimization Problems (DCOP) able to compute solutions with a guaranteed approximation ratio. In this paper we show that the introduction ...

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