Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:12:15 2012

Optimize a model with 1 rows, 54 columns and 54 nonzeros
Model has 82 quadratic objective terms
Presolve time: 0.00s
Presolved: 83 rows, 136 columns, 300 nonzeros
Variable types: 0 continuous, 136 integer (136 binary)
Found heuristic solution: objective 42.0000000

Root relaxation: objective 0.000000e+00, 109 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   27   42.00000    0.00000   100%     -    0s
H    0     0                      27.0000000    0.00000   100%     -    0s
     0     0    0.00000    0   40   27.00000    0.00000   100%     -    0s
     0     0    0.00000    0   26   27.00000    0.00000   100%     -    0s
H    0     0                      20.0000000    0.00000   100%     -    0s
H    0     0                      18.0000000    0.00000   100%     -    0s
     0     0    0.00000    0   27   18.00000    0.00000   100%     -    0s
     0     0    0.00000    0   18   18.00000    0.00000   100%     -    0s
     0     2    0.00000    0   18   18.00000    0.00000   100%     -    0s
*   79    70              30      17.0000000    0.00000   100%   2.9    0s
H  211   143                      16.0000000    0.00000   100%   5.5    0s
H  243   129                      13.0000000    0.00000   100%   6.0    0s
*  308   125              13      12.0000000    1.00000  91.7%   8.8    0s

Cutting planes:
  Cover: 158
  MIR: 4

Explored 546 nodes (9660 simplex iterations) in 0.16 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.200000000000e+01, best bound 1.200000000000e+01, gap 0.0%