Statechart Checks : (C1039) Compound transitions with nonorthogonal targets

(C1039) Compound transitions with nonorthogonal targets

There are compound transitions whose target set of states contains nonorthogonal (exclusive-or) states.
Error In:
Correctness
Example:
In the following figure, the target states of S1 contain the exclusive-or states S2 and S3.
Erroneous Elements:
Components of the erroneous transitions