Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:12:14 2012

Optimize a model with 1 rows, 54 columns and 54 nonzeros
Model has 73 quadratic objective terms
Presolve removed 0 rows and 3 columns
Presolve time: 0.00s
Presolved: 74 rows, 124 columns, 270 nonzeros
Variable types: 0 continuous, 124 integer (123 binary)
Found heuristic solution: objective 20.0000000

Root relaxation: objective 0.000000e+00, 97 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   23   20.00000    0.00000   100%     -    0s
     0     0    0.00000    0   18   20.00000    0.00000   100%     -    0s
H    0     0                      17.0000000    0.00000   100%     -    0s
H    0     0                      15.0000000    0.00000   100%     -    0s
     0     0    0.00000    0   23   15.00000    0.00000   100%     -    0s
     0     0    0.00000    0   15   15.00000    0.00000   100%     -    0s
     0     0    0.00000    0   16   15.00000    0.00000   100%     -    0s
     0     0    0.00000    0   22   15.00000    0.00000   100%     -    0s
     0     0    0.00000    0   22   15.00000    0.00000   100%     -    0s
H    0     0                      11.0000000    0.00000   100%     -    0s
     0     2    0.00000    0   22   11.00000    0.00000   100%     -    0s
*  124    75              18      10.0000000    0.00000   100%   6.2    0s
*  159    61              15       9.0000000    0.00000   100%   7.1    0s

Cutting planes:
  Cover: 139

Explored 303 nodes (5099 simplex iterations) in 0.08 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%