Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:41:33 2012

Optimize a model with 1 rows, 173 columns and 173 nonzeros
Model has 151 quadratic objective terms
Presolve removed 0 rows and 25 columns
Presolve time: 0.00s
Presolved: 152 rows, 299 columns, 601 nonzeros
Variable types: 0 continuous, 299 integer (298 binary)
Found heuristic solution: objective 44.0000000

Root relaxation: objective 0.000000e+00, 186 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   42   44.00000    0.00000   100%     -    0s
H    0     0                      31.0000000    0.00000   100%     -    0s
     0     0    0.00000    0   26   31.00000    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   17   16.00000    0.00000   100%     -    0s
     0     0    0.00000    0   13   16.00000    0.00000   100%     -    0s
H    0     0                      10.0000000    0.00000   100%     -    0s
     0     0    0.00000    0   56   10.00000    0.00000   100%     -    0s
     0     0    0.00000    0   21   10.00000    0.00000   100%     -    0s
     0     2    0.00000    0   21   10.00000    0.00000   100%     -    0s
H   27    27                       8.0000000    0.00000   100%   1.4    0s
H   80    53                       7.0000000    0.00000   100%   2.2    0s
H  461   194                       6.0000000    0.00000   100%   8.0    0s
H  488    96                       4.0000000    0.00000   100%   8.1    0s

Cutting planes:
  Cover: 259

Explored 640 nodes (13411 simplex iterations) in 0.26 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.000000000000e+00, best bound 4.000000000000e+00, gap 0.0%