title: SonarQube 6.0 - org.sonar.java.se.ExplodedGraphWalker$MaximumStepsReachedException: reached limit of 16000 steps for method
body: <p>I have created a custom rule for the sonarqube, Its working fine for a small java file file but when i am testing it under a large java file (more than 300+ line of code) then i am getting the below error.</p>
  
  <pre><code>19:41:52.077 [main] DEBUG o.s.java.se.SymbolicExecutionVisitor - Could not complete symbolic execution: 
  
  org.sonar.java.se.ExplodedGraphWalker$MaximumStepsReachedException: reached limit of 16000 steps for method xxxxMethod in class XXXXX
  </code></pre>
  
  <p>I am using </p>
  
  <ul>
  <li>sonar.version - 6.0 </li>
  <li>java.plugin.version - 4.2.1.6971</li>
  </ul>
  
  <p><strong>Full StackTrace</strong></p>
  
  <pre><code>org.sonar.squidbridge.api.AnalysisException: SonarQube is unable to analyze file : 'D:\Neon Workspace\java-custom-rules\src\test\files\XXXXX.java'
      at org.sonar.java.ast.JavaAstScanner.simpleScan(JavaAstScanner.java:93)
      at org.sonar.java.ast.JavaAstScanner.scan(JavaAstScanner.java:67)
      at org.sonar.java.ast.JavaAstScanner.scanSingleFileForTests(JavaAstScanner.java:137)
      at org.sonar.java.checks.verifier.JavaCheckVerifier.scanFile(JavaCheckVerifier.java:270)
      at org.sonar.java.checks.verifier.JavaCheckVerifier.scanFile(JavaCheckVerifier.java:257)
      at org.sonar.java.checks.verifier.JavaCheckVerifier.scanFile(JavaCheckVerifier.java:223)
      at org.sonar.java.checks.verifier.JavaCheckVerifier.verifyNoIssue(JavaCheckVerifier.java:159)
      at com.birchstreet.sonar.java.checks.ConnectionReturnCheckTest.detected(ConnectionReturnCheckTest.java:18)
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      at java.lang.reflect.Method.invoke(Method.java:497)
      at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
      at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
      at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
      at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
      at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
      at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
      at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
      at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
      at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
      at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
      at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
      at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
      at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
      at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)
      at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
      at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
      at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:678)
      at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
      at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
  Caused by: java.lang.ClassCastException: org.sonar.java.model.JavaTree$PrimitiveTypeTreeImpl cannot be cast to org.sonar.plugins.java.api.tree.IdentifierTree
      at com.mycompany.sonar.java.checks.UnclosedResourcesCheck.isConnectionVariable(UnclosedResourcesCheck.java:50)
      at com.mycompany.sonar.java.checks.UnclosedResourcesCheck.visitVariable(UnclosedResourcesCheck.java:43)
      at org.sonar.java.model.declaration.VariableTreeImpl.accept(VariableTreeImpl.java:184)
      at org.sonar.plugins.java.api.tree.BaseTreeVisitor.scan(BaseTreeVisitor.java:43)
      at org.sonar.plugins.java.api.tree.BaseTreeVisitor.scan(BaseTreeVisitor.java:37)
      at org.sonar.plugins.java.api.tree.BaseTreeVisitor.visitClass(BaseTreeVisitor.java:69)
      at org.sonar.java.model.declaration.ClassTreeImpl.accept(ClassTreeImpl.java:198)
      at org.sonar.plugins.java.api.tree.BaseTreeVisitor.scan(BaseTreeVisitor.java:43)
      at org.sonar.plugins.java.api.tree.BaseTreeVisitor.scan(BaseTreeVisitor.java:37)
      at org.sonar.plugins.java.api.tree.BaseTreeVisitor.visitCompilationUnit(BaseTreeVisitor.java:55)
      at org.sonar.java.model.JavaTree$CompilationUnitTreeImpl.accept(JavaTree.java:184)
      at org.sonar.plugins.java.api.tree.BaseTreeVisitor.scan(BaseTreeVisitor.java:43)
      at com.mycompany.sonar.java.checks.UnclosedResourcesCheck.scanFile(UnclosedResourcesCheck.java:27)
      at org.sonar.java.model.VisitorsBridge.visitFile(VisitorsBridge.java:123)
      at org.sonar.java.ast.JavaAstScanner.simpleScan(JavaAstScanner.java:84)
      ... 30 more
  </code></pre>