Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:13:30 2012

Optimize a model with 1 rows, 59 columns and 59 nonzeros
Model has 78 quadratic objective terms
Presolve time: 0.00s
Presolved: 79 rows, 137 columns, 293 nonzeros
Variable types: 0 continuous, 137 integer (137 binary)
Found heuristic solution: objective 28.0000000

Root relaxation: objective 0.000000e+00, 106 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   15   28.00000    0.00000   100%     -    0s
H    0     0                      15.0000000    0.00000   100%     -    0s
     0     0    0.00000    0   22   15.00000    0.00000   100%     -    0s
H    0     0                      14.0000000    0.00000   100%     -    0s
     0     0    0.00000    0   15   14.00000    0.00000   100%     -    0s
H    0     0                      11.0000000    0.00000   100%     -    0s
     0     0    0.00000    0   21   11.00000    0.00000   100%     -    0s
     0     0    0.00000    0   20   11.00000    0.00000   100%     -    0s
H    0     0                       9.0000000    0.00000   100%     -    0s
     0     2    0.00000    0   20    9.00000    0.00000   100%     -    0s
*  235    68               6       7.0000000    2.00000  71.4%  11.7    0s

Cutting planes:
  Cover: 145

Explored 306 nodes (5620 simplex iterations) in 0.09 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.000000000000e+00, best bound 7.000000000000e+00, gap 0.0%