Institute of Informatics, Silesian University of Technology, Akademicka 16, 44-100 Gliwice, Poland. sebastian.deorowicz@polsl.pl|Institute of Informatics, Silesian University of Technology, Akademicka 16, 44-100 Gliwice, Poland. sebastian.deorowicz@polsl.pl|Institute of Informatics, Silesian University of Technology, Akademicka 16, 44-100 Gliwice, Poland. sebastian.deorowicz@polsl.pl