Program: 56198
Project: 56198
Buggy source:
private void checkWorkerCreationRequests(){
  EMovableType[] movableTypes=workerCreationRequests.getSlotTypes();
  for (int slotIdx=0; slotIdx < movableTypes.length; slotIdx++) {
    WorkerCreationRequest workerRequest=workerCreationRequests.popFront(slotIdx);
    if (workerRequest != null) {
      EMaterialType tool=workerRequest.movableType.getTool();
      if (tool != EMaterialType.NO_MATERIAL) {
        if (toolRequestingWorkerRequests.getSlotSize(tool) <= 3) {
          MaterialOffer offer=this.materialOffers.removeOfferCloseTo(workerRequest.movableType.getTool(),workerRequest.position);
          if (offer != null) {
            IManageableBearer manageableBearer=joblessBearer.removeObjectNextTo(workerRequest.position);
            if (manageableBearer != null) {
              manageableBearer.becomeWorker(this,workerRequest.movableType,offer.getPos());
            }
 else {
              workerCreationRequests.pushLast(slotIdx,workerRequest);
            }
          }
 else {
            toolProductionRequests.add(tool,new ProductionRequest(tool,workerRequest.position));
            toolRequestingWorkerRequests.pushLast(tool,workerRequest);
          }
        }
 else {
          workerCreationRequests.pushLast(slotIdx,workerRequest);
        }
      }
 else {
        IManageableBearer manageableBearer=joblessBearer.removeObjectNextTo(workerRequest.position);
        if (manageableBearer != null) {
          manageableBearer.becomeWorker(this,workerRequest.movableType);
        }
 else {
          workerCreationRequests.pushLast(slotIdx,workerRequest);
        }
      }
    }
  }
}

Fixed version (ground truth):
private void checkWorkerCreationRequests(){
  EMovableType[] movableTypes=workerCreationRequests.getSlotTypes();
  for (int slotIdx=0; slotIdx < movableTypes.length; slotIdx++) {
    WorkerCreationRequest workerRequest=workerCreationRequests.popFront(slotIdx);
    if (workerRequest != null) {
      EMaterialType tool=workerRequest.movableType.getTool();
      if (tool != EMaterialType.NO_MATERIAL) {
        if (toolRequestingWorkerRequests.getSlotSize(tool) <= 3) {
          MaterialOffer offer=this.materialOffers.removeOfferCloseTo(tool,workerRequest.position);
          if (offer != null) {
            IManageableBearer manageableBearer=joblessBearer.removeObjectNextTo(workerRequest.position);
            if (manageableBearer != null) {
              manageableBearer.becomeWorker(this,workerRequest.movableType,offer.getPos());
            }
 else {
              workerCreationRequests.pushLast(slotIdx,workerRequest);
              materialOffers.addOffer(offer.getPos(),tool);
            }
          }
 else {
            toolProductionRequests.add(tool,new ProductionRequest(tool,workerRequest.position));
            toolRequestingWorkerRequests.pushLast(tool,workerRequest);
          }
        }
 else {
          workerCreationRequests.pushLast(slotIdx,workerRequest);
        }
      }
 else {
        IManageableBearer manageableBearer=joblessBearer.removeObjectNextTo(workerRequest.position);
        if (manageableBearer != null) {
          manageableBearer.becomeWorker(this,workerRequest.movableType);
        }
 else {
          workerCreationRequests.pushLast(slotIdx,workerRequest);
        }
      }
    }
  }
}