Program: 91775
Project: 91775
Buggy source:
@Override protected IStatus run(final IProgressMonitor monitor){
  monitor.beginTask(DVMessages.getFormattedString(CRATE_VM_TITLE,vmName),IProgressMonitor.UNKNOWN);
  IVagrantConnection connection=VagrantService.getInstance();
  IVagrantBox box=null;
  File vagrantDir;
  String boxName=boxRef;
  if (vmFile == null) {
    boolean isValidURL=true;
    try {
      new URL(boxRef);
    }
 catch (    MalformedURLException e1) {
      isValidURL=false;
    }
    if (Paths.get(boxRef).toFile().canRead() || isValidURL) {
      try {
        String boxPath=boxRef;
        boxName=boxRef.substring(boxRef.lastIndexOf(File.separator) + 1).replace("String_Node_Str","String_Node_Str");
        connection.addBox(boxName,boxPath,isValidURL);
      }
 catch (      VagrantException e) {
      }
catch (      InterruptedException e) {
      }
    }
    vagrantDir=performInit(vmName,boxName,connection);
    box=findBox(connection,boxName);
    while (box == null && isValidURL) {
      try {
        Thread.sleep(1000);
      }
 catch (      InterruptedException e) {
      }
      connection.getVMs(true);
      box=findBox(connection,boxName);
      if (monitor.isCanceled()) {
        CommandUtils.delete(vagrantDir);
        return Status.CANCEL_STATUS;
      }
    }
  }
 else {
    vagrantDir=Paths.get(vmFile).getParent().toFile();
  }
  EnvironmentsManager.getSingleton().setEnvironment(vagrantDir,environment);
  String provider=(box == null ? null : box.getProvider());
  connection.up(vagrantDir,provider);
  connection.getVMs(true);
  return Status.OK_STATUS;
}

Fixed version (ground truth):
@Override protected IStatus run(final IProgressMonitor monitor){
  monitor.beginTask(DVMessages.getFormattedString(CRATE_VM_TITLE,vmName),IProgressMonitor.UNKNOWN);
  IVagrantConnection connection=VagrantService.getInstance();
  if (findVM(connection,vmName) != null) {
    Display.getDefault().syncExec(() -> MessageDialog.openError(Display.getCurrent().getActiveShell(),WizardMessages.getString("String_Node_Str"),WizardMessages.getString("String_Node_Str")));
    return Status.CANCEL_STATUS;
  }
  IVagrantBox box=null;
  File vagrantDir;
  String boxName=boxRef;
  if (vmFile == null) {
    boolean isValidURL=true;
    try {
      new URL(boxRef);
    }
 catch (    MalformedURLException e1) {
      isValidURL=false;
    }
    if (Paths.get(boxRef).toFile().canRead() || isValidURL) {
      try {
        String boxPath=boxRef;
        boxName=boxRef.substring(boxRef.lastIndexOf(File.separator) + 1).replace("String_Node_Str","String_Node_Str");
        connection.addBox(boxName,boxPath,isValidURL);
      }
 catch (      VagrantException e) {
      }
catch (      InterruptedException e) {
      }
    }
    vagrantDir=performInit(vmName,boxName,connection);
    box=findBox(connection,boxName);
    while (box == null && isValidURL) {
      try {
        Thread.sleep(1000);
      }
 catch (      InterruptedException e) {
      }
      connection.getVMs(true);
      box=findBox(connection,boxName);
      if (monitor.isCanceled()) {
        CommandUtils.delete(vagrantDir);
        return Status.CANCEL_STATUS;
      }
    }
  }
 else {
    vagrantDir=Paths.get(vmFile).getParent().toFile();
  }
  EnvironmentsManager.getSingleton().setEnvironment(vagrantDir,environment);
  String provider=(box == null ? null : box.getProvider());
  connection.up(vagrantDir,provider);
  connection.getVMs(true);
  return Status.OK_STATUS;
}