Got IllegalArgumentException while evaluating streamalg

[yiming-tang-cs]

I got

java.lang.IllegalArgumentException: no calls at site's pc
	at com.ibm.wala.ssa.IR.getCalls(IR.java:544)
	at edu.cuny.hunter.streamrefactoring.core.analysis.StreamStateMachine.discoverPossibleSideEffects(StreamStateMachine.java:827)
	at edu.cuny.hunter.streamrefactoring.core.analysis.StreamStateMachine.start(StreamStateMachine.java:1101)
	at edu.cuny.hunter.streamrefactoring.core.analysis.StreamAnalyzer.analyze(StreamAnalyzer.java:158)
	at edu.cuny.hunter.streamrefactoring.core.refactorings.ConvertToParallelStreamRefactoringProcessor.checkFinalConditions(ConvertToParallelStreamRefactoringProcessor.java:220)
	at org.eclipse.ltk.core.refactoring.participants.ProcessorBasedRefactoring.checkFinalConditions(ProcessorBasedRefactoring.java:222)
	at org.eclipse.ltk.core.refactoring.Refactoring.checkAllConditions(Refactoring.java:162)
	at edu.cuny.hunter.streamrefactoring.eval.handlers.EvaluateConvertToParallelStreamRefactoringHandler.lambda$0(EvaluateConvertToParallelStreamRefactoringHandler.java:257)
	at org.eclipse.core.runtime.jobs.Job$1.run(Job.java:161)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:56)

while evaluating streamalg.

I imported this project as an existing maven project.

Set all the options(benchmark, test and main method) are true. Then, after long time to run the tool, I got the exception.

These exception did not appear if I just added several explicit entry points.