Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:13:14 2012

Optimize a model with 1 rows, 58 columns and 58 nonzeros
Model has 81 quadratic objective terms
Presolve removed 0 rows and 1 columns
Presolve time: 0.00s
Presolved: 82 rows, 138 columns, 300 nonzeros
Variable types: 0 continuous, 138 integer (137 binary)
Found heuristic solution: objective 31.0000000

Root relaxation: objective 0.000000e+00, 101 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   31.00000    0.00000   100%     -    0s
H    0     0                      21.0000000    0.00000   100%     -    0s
     0     0    0.00000    0   27   21.00000    0.00000   100%     -    0s
H    0     0                      20.0000000    0.00000   100%     -    0s
     0     0    0.00000    0   17   20.00000    0.00000   100%     -    0s
H    0     0                      17.0000000    0.00000   100%     -    0s
H    0     0                      16.0000000    0.00000   100%     -    0s
     0     0    0.00000    0   21   16.00000    0.00000   100%     -    0s
H    0     0                      13.0000000    0.00000   100%     -    0s
     0     0    0.00000    0   29   13.00000    0.00000   100%     -    0s
     0     0    0.00000    0   17   13.00000    0.00000   100%     -    0s
     0     2    0.00000    0   16   13.00000    0.00000   100%     -    0s
H  273   152                      12.0000000    0.00000   100%   7.6    0s
H  354   145                      11.0000000    1.00000  90.9%   9.5    0s
H  436    85                       9.0000000    1.00000  88.9%  12.4    0s

Cutting planes:
  Cover: 154

Explored 556 nodes (10125 simplex iterations) in 0.17 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%