digraph petrinet {
    PROGRAM_END [shape="circle" xlabel="PROGRAM_END" label=""];
    PROGRAM_PANIC [shape="circle" xlabel="PROGRAM_PANIC" label=""];
    PROGRAM_START [shape="circle" xlabel="PROGRAM_START" label="•"];
    does_not_return_DIVERGING_CALL [shape="box" xlabel="" label="does_not_return_DIVERGING_CALL"];
    PROGRAM_START -> does_not_return_DIVERGING_CALL;
}