 Through multiple experiments on a simulated environment, we demonstrate that our approach generates the stress test cases for different programs efficiently and adaptively without access to  performance models.
<meaning-changed>  Through multiple experiments on a simulated environment, we demonstrate that our approach generates the stress test cases for different programs efficiently and adaptively without access to  performance models.
 Through multiple experiments on a simulated environment, we demonstrate that our approach generates the stress test cases for different programs efficiently and adaptively without access to source code and performance models.