Uniform and Scalable SAT-Sampling for Configurable Systems

• Autores: Rubén Heradio Gil, David Jose Fernandez Amoros, José A. Galindo, David Benavides
• Localización: Actas de las XXV Jornadas de Ingeniería del Software y Bases de Datos (JISBD 2021): [Málaga, 22 al 24 de septiembre de 2021] / coord. por Rafael Capilla Sevilla, Maider Azanza Sese, Miguel Rodríguez Luaces, M. M. Roldán García, Dolores Burgueño Caballero, José Raúl Romero Salguero, José Antonio Parejo Maestre, José Francisco Chicano García, Marcela Genero, Óscar Díaz García, José González Enríquez, María Carmen Penades Gramage; Silvia Mara Abrahao Gonzales (col.), 2021
• Idioma: inglés
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• Resumen

  • Several relevant analyses on configurable software systems remain intractable because they require examining vast and highly-constrained configuration spaces. Those analyses could be addressed through statistical inference, i.e., working with a much more tractable sample that later supports generalizing the results obtained to the entire configuration space. To make this possible, the laws of statistical inference impose an indispensable requirement: each member of the population must be equally likely to be included in the sample, i.e., the sampling process needs to be +AGAAYA-uniform''. Various SAT-samplers have been developed for generating uniform random samples at a reasonable computational cost. Unfortunately, there is a lack of experimental validation over large configuration models to show whether the samplers indeed produce genuine uniform samples or not. This paper (i) presents a new statistical test to verify to what extent samplers accomplish uniformity and (ii) reports the evaluation of four state-of-the-art samplers: Spur, QuickSampler, Unigen2, and Smarch. According to our experimental results, only Spur satisfies both scalability and uniformity.