Dross, Claire Furia, Carlo A Huisman, Marieke Monahan, Rosemary Müller, Peter 2021-05-19 VerifyThis is a series of program verification competitions that emphasize the human aspect: participants tackle the verification of detailed behavioral properties—something that lies beyond the capabilities of fully automatic verification and requires instead human expertise to suitably encode programs, specifications, and invariants. This paper describes the 8th edition of VerifyThis, which took place at ETAPS 2019 in Prague. Thirteen teams entered the competition, which consisted of three verification challenges and spanned 2 days ofwork. This report analyzes howthe participating teams fared on these challenges, reflects on what makes a verification challenge more or less suitable for the typical VerifyThis participants, and outlines the difficulties of comparing the work of teams using wildly different verification approaches in a competition focused on the human aspect. application/pdf https://localhost:5000/ark:/12658/srd1319373 https://susi.usi.ch/global/documents/319373 https://susi.usi.ch/documents/319373/files/Furia_ijstftt_2021.pdf ita info:eu-repo/semantics/altIdentifier/doi/10.1007/s10009-021-00619-x info:eu-repo/semantics/altIdentifier/ark/12658/srd1319373 info:eu-repo/semantics/openAccess CC BY International Journal on Software Tools for Technology Transfer. - Springer. - 2021, vol. 23, p. 883–893 Functional correctness Correctness proofs Program verification Verification competition info:eu-repo/classification/udc/004 VerifyThis 2019 : a program verification competition http://purl.org/coar/resource_type/c_6501