Hi Yogesh Vasant Kadam

you can try this publication:

Conference Paper An Extensive Dataset of UML Models in GitHub

you can find a lot of UML sets on github. you can also try "Lindholmen dataset", you can find it on google.

hope this helps

Shamil AL-Ameen : Thank you for the information...

Hi Shamil, in most cases each proposal of model-based testing technique uses a different prioritization mechanism. Moreover, some excerpts of the models are presented in the publications due to size limits, so it is difficult to fairly apply other prioritization and compare. I recommend you to create the UML models that you need to apply the model-based test case generation using different prioritization and then you can compare the prioritization in a controlled environment.