Efficient Semantics-Based Compliance Checking Using LTL Formulae and Unfolding

Algorithm 6

Determining the (unary) basic predicate posoccur.

function  POSOCCUR

Input: A taskID 𝑡, a process model 𝑟

Output: A boolean value

begin

 𝔾∶=  RetrieveBigraphs(𝑟);

 return _𝐺⋁_∈𝔾(RetrieveAllEvents(𝐺,𝑡)≠∅)