Environment: [x = {a}.y, y =({a}.x + {b}.y) ]
Initial Entities: {a, b}
Context: [({a,b}.{a}.{a,c}.x + {a,b}.{a}.{a}.nill)]
Reactions: ([{a,b}, {c}, {b}])


Digraph
  > Dot
  | Context
  | Hide
  | Context.EntitySet ⊆ {a, c} ? "lightblue" || Context.NonDeterministicChoice ? "yellow" ! "#123"
  | Entities < {a} ? "white" ! "#lightgreen"
  > Print