Stratified Abstraction of Access Control Policies. - John Backes; Ulises Berrueco; Tyler Bray; Daniel Brim; Byron Cook; Andrew Gacek; Ranjit Jhala; Kasper Søe Luckow; Sean McLaughlin; Madhav Menon; Daniel Peebles; Ujjwal Pugalia; et al. (CAV (1), 2020)