Marco Gaboardi, Kobbi Nissim, David Purser. The Complexity of Verifying Loop-Free Programs as Differentially Private. In Artur Czumaj, Anuj Dawar, Emanuela Merelli, editors, 47th International Colloquium on Automata, Languages, and Programming, ICALP 2020, July 8-11, 2020, Saarbrücken, Germany (Virtual Conference). Volume 168 of LIPIcs, Schloss Dagstuhl - Leibniz-Zentrum für Informatik, 2020. [doi]