I used your code to test the app in DroidBench data set, but the generated CG and dot files are empty. What should I do?

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[main] INFO soot.jimple.infoflow.android.SetupApplication - Initializing Soot...
[main] INFO soot.jimple.infoflow.android.SetupApplication - Loading dex files...
[main] INFO soot.jimple.infoflow.android.SetupApplication - ARSC file parsing took 0.010808292 seconds
[main] INFO soot.jimple.infoflow.android.entryPointCreators.AndroidEntryPointCreator - Creating Android entry point for 1 components...
[main] INFO soot.jimple.infoflow.android.SetupApplication - Constructing the callgraph...
[main] INFO soot.jimple.infoflow.android.callbacks.DefaultCallbackAnalyzer - Collecting callbacks in DEFAULT mode...
[main] INFO soot.jimple.infoflow.android.callbacks.DefaultCallbackAnalyzer - Callback analysis done.
[main] WARN soot.jimple.infoflow.android.resources.LayoutFileParser - Could not find layout class RelativeLayout
[main] WARN soot.jimple.infoflow.android.resources.LayoutFileParser - Could not find layout class TextView
[main] INFO soot.jimple.infoflow.memory.MemoryWarningSystem - Shutting down the memory warning system...
[main] INFO soot.jimple.infoflow.android.SetupApplication - Callback analysis terminated normally
[main] INFO soot.jimple.infoflow.android.SetupApplication - Entry point calculation done.
[main] INFO soot.jimple.infoflow.android.SetupApplication - Collecting callbacks and building a callgraph took 0 seconds
[main] INFO soot.jimple.infoflow.android.SetupApplication - Running data flow analysis on /Users/donghongtu/IdeaProjects/MyFlowAnalysis-master/DroidBench/apk/ArraysAndLists/ArrayToString1.apk with 0 sources and 0 sinks...
[main] INFO soot.jimple.infoflow.InfoflowConfiguration - Implicit flow tracking is NOT enabled
[main] INFO soot.jimple.infoflow.InfoflowConfiguration - Exceptional flow tracking is enabled
[main] INFO soot.jimple.infoflow.InfoflowConfiguration - Running with a maximum access path length of 5
[main] INFO soot.jimple.infoflow.InfoflowConfiguration - Using path-agnostic result collection
[main] INFO soot.jimple.infoflow.InfoflowConfiguration - Recursive access path shortening is enabled
[main] INFO soot.jimple.infoflow.InfoflowConfiguration - Taint analysis enabled: false
[main] INFO soot.jimple.infoflow.InfoflowConfiguration - Using alias algorithm FlowSensitive
[main] INFO soot.jimple.infoflow.android.SetupApplication$InPlaceInfoflow - Callgraph construction took 0 seconds
[main] INFO soot.jimple.infoflow.codeOptimization.InterproceduralConstantValuePropagator - Removing side-effect free methods is disabled
[main] INFO soot.jimple.infoflow.android.SetupApplication$InPlaceInfoflow - Dead code elimination took 0.029885209 seconds
[main] INFO soot.jimple.infoflow.android.SetupApplication$InPlaceInfoflow - Callgraph has 0 edges
[main] INFO soot.jimple.infoflow.android.SetupApplication - Found 0 leaks
0
./sootOutput/ArrayToString1.dot
Test Successful