fact: Definition fulfillAR_step s t (X : {fset clause}) := [fset Y in T | [all D in Req Y, suppS S D] && (suppS S (t^- |` R Y) || [some E in T, suppC E (s^- |` R Y) && (E \in X)])].
imports: mathcomp.ssreflect.ssreflect mathcomp(all_ssreflect) CompDecModal.libs(edone bcase fset base sltype) CompDecModal.CTL(CTL_def dags)