Preface The 19th Italian Conference on Theoretical Computer Science (ICTCS 2018) was held on September 18–20, 2018, in the center of Urbino, a walled city listed by UNESCO as a World Heritage Site, which was one of the capitals of Renais- sance. ICTCS is the annual conference of the Italian Chapter of the European Association for Theoretical Computer Science (IC-EATCS). The purpose of the meeting is to foster the cross-fertilization of ideas stemming from different areas of theoretical computer science. In particular, it provides an ideal environment where junior researchers and PhD students can meet senior researchers. The top- ics of interest include agents, algorithms, argumentation, automata theory, com- plexity theory, computational logic, computational social choice, concurrency theory, cryptography, discrete mathematics, distributed computing, dynamical systems, formal methods, game theory, graph theory, knowledge representation, languages, model checking, process algebras, quantum computing, rewriting sys- tems, security and trust, semantics, specification and verification, systems biol- ogy, theorem proving, and type theory. ICTCS 2018 received 33 submissions (19 regular papers and 14 communica- tions), of which 25 were accepted for presentation at the conference and then published on http://ceur-ws.org/ (16 regular papers and 9 communications). Each submission was assessed by 3 reviewers, for a total of 58 reviewers (36 pro- gram committee members plus 22 additional reviewers) producing 99 reviews overall. The authors of the accepted contributions mostly came from Italy both in terms of nationality (83.87%) and affiliation (85.48%). Foreign authors came from Germany (3), The Netherlands (2), Brazil (2), Portugal (1), and USA (1). ICTCS 2018 was attended by 40 people. In addition to the invited talks given by Rossella Petreschi and Davide Sangiorgi, as usual the conference included on its second day the IC-EATCS annual meeting and the award ceremony for the IC-EATCS best young researcher Nicola Prezza who gave an invited talk too, the IC-EATCS best PhD thesis by Michele Ciampi and Luisa Siniscalchi, and the best MSc thesis by Francesco Dagnino. The best PhD thesis award was entitled to the memory of Mattia Gastaldello. Moreover, on the first day there was a panel on past and future of the VQR – Italy’s national research assessment – chaired by Angelo Montanari, president of IC-EATCS, whose participants were Ciriaco Andrea D’Angelo, Andrea Marin, the rector of the University of L’Aquila Paola Inverardi, and the rector of the University of Urbino Vilberto Stocchi. Finally, on the third day a seminar in honour of Corrado Böhm took place, which was organized by Ugo de’ Liguoro and Benedetto Intrigila. We conclude by thanking the program committee members, the additional reviewers, the invited speakers, the authors, and all the participants. Special thanks go to Angelo Montanari for his suggestions during the organization of the conference, Daniela Cini of Studio Synthesis for her logistic and administrative support, and the Department of Pure and Applied Sciences (DiSPeA) of the University of Urbino for the financial support of the invited speakers. Urbino, November 2018 Alessandro Aldini and Marco Bernardo Organization Program Chairs Alessandro Aldini Università di Urbino Carlo Bo Marco Bernardo Università di Urbino Carlo Bo Program Committee Marco Antoniotti Università di Milano Bicocca Franco Barbanera Università di Catania Anna Bernasconi Università di Pisa Davide Bilò Università di Sassari Stefano Bistarelli Università di Perugia Luca Bortolussi Università di Trieste Tiziana Calamoneri Università di Roma Sapienza Antonio Caruso Università del Salento Silvia Crafa Università di Padova Ugo Dal Lago Università di Bologna Gianlorenzo D’Angelo Gran Sasso Science Institute Moreno Falaschi Università di Siena Gabriele Fici Università di Palermo Michele Flammini Università dell’Aquila & GSSI Dora Giammarresi Università di Roma Tor Vergata Paola Giannini Università del Piemonte Orientale Flaminia Luccio Università Ca’ Foscari di Venezia Isabella Mastroeni Università di Verona Maria Chiara Meo Università di Chieti e Pescara Gabriele d’Annunzio Emanuela Merelli Università di Camerino Manuela Montangero Università di Modena e Reggio Emilia Aniello Murano Università di Napoli Federico II Luca Padovani Università di Torino Domenico Parente Università di Salerno Simona Perri Università della Calabria Carla Piazza Università di Udine Giovanni Pighizzini Università di Milano Giovanni Michele Pinna Università di Cagliari Rosario Pugliese Università di Firenze Paola Quaglia Università di Trento Gianfranco Rossi Università di Parma Pierluigi San Pietro Politecnico di Milano Simone Tini Università dell’Insubria Mirco Tribastone IMT Lucca Paola Vocca Università della Tuscia Elena Zucca Università di Genova Additional Reviewers Anselmo, Marcella Frigo, Matteo Arisaka, Ryuta Goldwurm, Massimiliano Bruno, Pierangela Leoncini, Mauro Casagrande, Alberto Mantadelis, Theofrastos Castiglione, Giuseppa Moscardelli, Luca Castiglioni, Valentina Pacenza, Francesco Corò, Federico Pasqua, Michele De Angelis, Emanuele Quadrini, Michela De Luca, Alessandro Tesei, Luca De Marco, Gianluca Valentini, Giorgio D’Emidio, Mattia Wang, Kewen