JUnit Test for Model Checker of languages

I have written a simple node testcase code like this for the model checker of the language.

ModelCheckerTool instance = ModelCheckerTool.getInstance(toIdeaProject);
ModelCheckerViewer checkModels = instance.checkModels(language.getModels());
SearchResults<IssueKindReportItem> searchResults = checkModels.getSearchResults();

if (searchResults.getResultObjects() != null) {
assert (ModelCheckerUtils.getIssueCountForSeverity(searchResults, ModelCheckerIssueFinder.SEVERITY_ERROR)) <= 0;
}

Result:

The test is running completely fine inside MPS. While running through ant target for the same, I am getting loop hole like this.

17:19:24     [junit] [  89286]   INFO - st.runtime.TestParametersCache - Initializing the test 
17:19:24     [junit] [  89286]   INFO - ol.environment.EnvironmentBase - Using the last created project 
17:19:24     [junit] [  89343]   INFO - il.indexing.FileBasedIndexImpl - START INDEX SHUTDOWN 
17:19:24     [junit] [  89373]   INFO - il.indexing.FileBasedIndexImpl - END INDEX SHUTDOWN 
17:19:24     [junit] [  89373]   INFO - stubs.SerializationManagerImpl - START StubSerializationManager SHUTDOWN 
17:19:24     [junit] [  89373]   INFO - stubs.SerializationManagerImpl - END StubSerializationManager SHUTDOWN 
17:19:24     [junit] [  89375]   INFO - newvfs.persistent.PersistentFS - VFS dispose started 
17:19:24     [junit] [  89379]   INFO - newvfs.persistent.PersistentFS - VFS dispose completed 

I increased the VM size in the buildScript and then disposed off the modelchecker tool like this.

instance.dispose();

But both didn't work in my case.

Any clues for resolving the issue. Waiting for your answers.

Thanks in Advance,

Narendran