locales ACf, ACIf, ACIfSL and ACIfSLlin have been abandoned in favour of the existing algebraic classes ab_semigroup_mult, ab_semigroup_idem_mult, lower_semilattice (resp. uper_semilattice) and linorder
use "../settings.ML";
use_thy "PDL";
use_thy "CTL";
use_thy "CTLind";