Gurobi 5.0.1 (linux64) logging started Sat Nov 17 23:38:40 2012

Optimize a model with 1 rows, 31 columns and 31 nonzeros
Model has 52 quadratic objective terms
Presolve time: 0.00s
Presolved: 53 rows, 83 columns, 187 nonzeros
Variable types: 0 continuous, 83 integer (83 binary)
Found heuristic solution: objective 25.0000000
Found heuristic solution: objective 23.0000000

Root relaxation: objective 0.000000e+00, 67 iterations, 0.00 seconds

    Nodes    |    Current Node    |     Objective Bounds      |     Work
 Expl Unexpl |  Obj  Depth IntInf | Incumbent    BestBd   Gap | It/Node Time

     0     0    0.00000    0   21   23.00000    0.00000   100%     -    0s
H    0     0                      21.0000000    0.00000   100%     -    0s
     0     0    0.00000    0   39   21.00000    0.00000   100%     -    0s
     0     0    0.00000    0   15   21.00000    0.00000   100%     -    0s
H    0     0                      15.0000000    0.00000   100%     -    0s
H    0     0                      14.0000000    0.00000   100%     -    0s
H    0     0                      13.0000000    0.00000   100%     -    0s
     0     2    0.00000    0   15   13.00000    0.00000   100%     -    0s
H   38    27                      12.0000000    0.00000   100%   3.2    0s
*   78    46              17      11.0000000    0.00000   100%   4.4    0s
*   82    40              18      10.0000000    0.00000   100%   4.3    0s
*  123    39              13       9.0000000    1.00000  88.9%   6.6    0s

Cutting planes:
  Cover: 95

Explored 211 nodes (2120 simplex iterations) in 0.04 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 9.000000000000e+00, best bound 9.000000000000e+00, gap 0.0%