level Concrete level refinement −−−−−−→ ConnectToServer Details used to establish the connection abstraction ←−−−−−− Formalisation of abstraction Let σ : A → P(B) be a substitution. Abstract level Concrete level σ(L) = {w ∈ A | σ(w) ∩ L '= ∅} abstraction ←−−−−−− L ⊆ B 5/29 Adding time to the picture Timed refinement refinement −−−−−−→ Abstract level Concrete level abstraction ←−−−−−− ConnectToS...
