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="•"];
    main_BB1 [shape="circle" xlabel="main_BB1" label=""];
    main_BB2 [shape="circle" xlabel="main_BB2" label=""];
    main_BB3 [shape="circle" xlabel="main_BB3" label=""];
    main_BB4 [shape="circle" xlabel="main_BB4" label=""];
    main_BB5 [shape="circle" xlabel="main_BB5" label=""];
    main_DROP_2 [shape="box" xlabel="" label="main_DROP_2"];
    main_DROP_4 [shape="box" xlabel="" label="main_DROP_4"];
    main_RETURN [shape="box" xlabel="" label="main_RETURN"];
    main_UNWIND_5 [shape="box" xlabel="" label="main_UNWIND_5"];
    std_env_args_0_CALL [shape="box" xlabel="" label="std_env_args_0_CALL"];
    std_iter_ExactSizeIterator_len_0_CALL [shape="box" xlabel="" label="std_iter_ExactSizeIterator_len_0_CALL"];
    std_iter_ExactSizeIterator_len_0_CALL_UNWIND [shape="box" xlabel="" label="std_iter_ExactSizeIterator_len_0_CALL_UNWIND"];
    PROGRAM_START -> std_env_args_0_CALL;
    main_BB1 -> std_iter_ExactSizeIterator_len_0_CALL;
    main_BB1 -> std_iter_ExactSizeIterator_len_0_CALL_UNWIND;
    main_BB2 -> main_DROP_2;
    main_BB3 -> main_RETURN;
    main_BB4 -> main_DROP_4;
    main_BB5 -> main_UNWIND_5;
    main_DROP_2 -> main_BB3;
    main_DROP_4 -> main_BB5;
    main_RETURN -> PROGRAM_END;
    main_UNWIND_5 -> PROGRAM_PANIC;
    std_env_args_0_CALL -> main_BB1;
    std_iter_ExactSizeIterator_len_0_CALL -> main_BB2;
    std_iter_ExactSizeIterator_len_0_CALL_UNWIND -> main_BB4;
}