Program: 149417
Project: 149417
Buggy source:
@Override public Collection<NodeProvisioner.PlannedNode> provision(Label label,int excessWorkload){
  for (  Node node : Jenkins.getInstance().getNodes()) {
    if (node instanceof ElasticBoxSlave) {
      ElasticBoxSlave slave=(ElasticBoxSlave)node;
      if (ElasticBoxSlaveHandler.isSubmitted(slave)) {
        excessWorkload-=slave.getNumExecutors();
      }
 else       if (label.matches(slave) && slave.getComputer().isOffline() && slave.getInstanceId() != null) {
        try {
          JSONObject instance=slave.getInstance();
          String state=instance.getString("String_Node_Str");
          String operation=instance.getString("String_Node_Str");
          if (Client.ON_OPERATIONS.contains(operation) && (Client.InstanceState.PROCESSING.equals(state) || Client.InstanceState.DONE.equals(state))) {
            excessWorkload-=slave.getNumExecutors();
          }
        }
 catch (        IOException ex) {
          Logger.getLogger(ElasticBoxCloud.class.getName()).log(Level.SEVERE,ex.getMessage(),ex);
        }
      }
    }
  }
  List<NodeProvisioner.PlannedNode> plannedNodes=new ArrayList<NodeProvisioner.PlannedNode>();
  while (excessWorkload > 0) {
    try {
      if (ElasticBoxSlaveHandler.countInstances() >= maxInstances) {
        Logger.getLogger(ElasticBoxCloud.class.getName()).log(Level.WARNING,"String_Node_Str");
        break;
      }
      String profileId=label.getName().substring(ElasticBoxLabelFinder.REUSE_PREFIX.length());
      final ElasticBoxSlave slave=new ElasticBoxSlave(UUID.randomUUID().toString(),false);
      slave.setProfileId(profileId);
      slave.setCloud(this);
      plannedNodes.add(new NodeProvisioner.PlannedNode(slave.getDisplayName(),Computer.threadPoolForRemoting.submit(new Callable<Node>(){
        public Node call() throws Exception {
          slave.setInUse(true);
          Jenkins.getInstance().addNode(slave);
          IProgressMonitor monitor=ElasticBoxSlaveHandler.submit(slave);
          monitor.waitForDone(ElasticBoxSlaveHandler.TIMEOUT_MINUTES);
          if (slave.getComputer() != null && slave.getComputer().isOnline()) {
            return slave;
          }
 else {
            throw new Exception(MessageFormat.format("String_Node_Str",slave.getDisplayName()));
          }
        }
      }
),1));
      excessWorkload-=slave.getNumExecutors();
    }
 catch (    Descriptor.FormException ex) {
      Logger.getLogger(ElasticBoxCloud.class.getName()).log(Level.SEVERE,ex.getMessage(),ex);
    }
catch (    IOException ex) {
      Logger.getLogger(ElasticBoxCloud.class.getName()).log(Level.SEVERE,ex.getMessage(),ex);
    }
  }
  return plannedNodes;
}

Fixed version (ground truth):
@Override public Collection<NodeProvisioner.PlannedNode> provision(Label label,int excessWorkload){
  for (  Node node : Jenkins.getInstance().getNodes()) {
    if (node instanceof ElasticBoxSlave) {
      ElasticBoxSlave slave=(ElasticBoxSlave)node;
      if (ElasticBoxSlaveHandler.isSubmitted(slave)) {
        excessWorkload-=slave.getNumExecutors();
      }
 else       if (label.matches(slave) && slave.getComputer().isOffline() && slave.getInstanceId() != null) {
        try {
          JSONObject instance=slave.getInstance();
          String state=instance.getString("String_Node_Str");
          String operation=instance.getString("String_Node_Str");
          if (Client.ON_OPERATIONS.contains(operation) && (Client.InstanceState.PROCESSING.equals(state) || Client.InstanceState.DONE.equals(state))) {
            excessWorkload-=slave.getNumExecutors();
          }
        }
 catch (        IOException ex) {
          Logger.getLogger(ElasticBoxCloud.class.getName()).log(Level.SEVERE,ex.getMessage(),ex);
        }
      }
    }
  }
  List<NodeProvisioner.PlannedNode> plannedNodes=new ArrayList<NodeProvisioner.PlannedNode>();
  while (excessWorkload > 0) {
    try {
      if (ElasticBoxSlaveHandler.countInstances() >= maxInstances) {
        Logger.getLogger(ElasticBoxCloud.class.getName()).log(Level.WARNING,"String_Node_Str");
        break;
      }
      String profileId=label.getName().substring(ElasticBoxLabelFinder.REUSE_PREFIX.length());
      final ElasticBoxSlave slave=new ElasticBoxSlave(profileId,false,this);
      plannedNodes.add(new NodeProvisioner.PlannedNode(slave.getDisplayName(),Computer.threadPoolForRemoting.submit(new Callable<Node>(){
        public Node call() throws Exception {
          slave.setInUse(true);
          Jenkins.getInstance().addNode(slave);
          IProgressMonitor monitor=ElasticBoxSlaveHandler.submit(slave);
          monitor.waitForDone(ElasticBoxSlaveHandler.TIMEOUT_MINUTES);
          if (slave.getComputer() != null && slave.getComputer().isOnline()) {
            return slave;
          }
 else {
            throw new Exception(MessageFormat.format("String_Node_Str",slave.getDisplayName()));
          }
        }
      }
),1));
      excessWorkload-=slave.getNumExecutors();
    }
 catch (    Descriptor.FormException ex) {
      Logger.getLogger(ElasticBoxCloud.class.getName()).log(Level.SEVERE,ex.getMessage(),ex);
    }
catch (    IOException ex) {
      Logger.getLogger(ElasticBoxCloud.class.getName()).log(Level.SEVERE,ex.getMessage(),ex);
    }
  }
  return plannedNodes;
}