1. Department of Computer Science and Statistics (DCCE), São Paulo State University (UNESP), Rua Cristóvão Colombo, 2265, São José do Rio Preto 15054-000, SP, Brazil
2. Department of Computer Science and Engineering (DISI), University of Bologna, Via dell’ Università, 50, 47522 Cesena, Italy
3. Science and Technology Institute, Federal University of São Paulo (UNIFESP), Avenida Cesare Mansueto Giulio Lattes, 1201, São José dos Campos 12247-014, SP, Brazil
4. Faculty of Computer Science (FACOM), Federal University of Uberlândia (UFU), Avenida João Naves de Ávila, 2121, Bl.B, Uberlândia 38400-902, MG, Brazil