Department of Computer Science and Engineering, University of Bologna, Cesena Campus, Via Sacchi 3, Cesena, 47521, Italy. pietro.dilena@unibo.it.|Department of Computer Science and Engineering, University of Bologna, Cesena Campus, Via Sacchi 3, Cesena, 47521, Italy. giacomo.domeniconi@unibo.it.|Department of Computer Science and Engineering, University of Bologna, Cesena Campus, Via Sacchi 3, Cesena, 47521, Italy. luciano.margara@unibo.it.|Department of Computer Science and Engineering, University of Bologna, Cesena Campus, Via Sacchi 3, Cesena, 47521, Italy. gianluca.moro@unibo.it.