         }
     }
 
-    cout << "errors: " << num_errors << endl;
+    cout << "ERRORS: " << num_errors << endl;
 
     //free memory
     delete[] keys_h;

    const index_t threads_per_block = atoi(argv[7]);
    //id of selected CUDA device
    const index_t device_id = atoi(argv[8]);

    if (verbosity > 0)
    {
        cout << "================== PARAMS =================="
             << "\n(static) group_size=" << group_size
             << "\n(static) verbosity=" << verbosity

    //the size of the thread groups (must be available at compile time)
    static constexpr index_t group_size = 16;
    //output verbosity (must be available at compile time)
    static constexpr index_t verbosity = 0;
    //filename for test data (dumped with binary_io.h)
    const string  filename = argv[1];
    //length of test data
