Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:36:32 2012

Optimize a model with 1 rows, 167 columns and 167 nonzeros
Model has 167 quadratic objective terms
Presolve removed 0 rows and 21 columns
Presolve time: 0.00s
Presolved: 168 rows, 313 columns, 647 nonzeros
Variable types: 0 continuous, 313 integer (312 binary)
Found heuristic solution: objective 51.0000000

Root relaxation: objective 0.000000e+00, 213 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   53   51.00000    0.00000   100%     -    0s
     0     0    0.00000    0   35   51.00000    0.00000   100%     -    0s
H    0     0                      28.0000000    0.00000   100%     -    0s
     0     0    0.00000    0   26   28.00000    0.00000   100%     -    0s
H    0     0                      22.0000000    0.00000   100%     -    0s
     0     0    0.00000    0   67   22.00000    0.00000   100%     -    0s
     0     0    0.00000    0   28   22.00000    0.00000   100%     -    0s
H    0     0                      19.0000000    0.00000   100%     -    0s
H    0     0                      17.0000000    0.00000   100%     -    0s
     0     2    0.00000    0   28   17.00000    0.00000   100%     -    0s
H  297   223                      15.0000000    0.00000   100%   5.8    0s
H  396   215                      12.0000000    0.00000   100%   8.4    0s
H  401   174                      10.0000000    0.00000   100%   8.4    0s
*  408   155              19       9.0000000    0.00000   100%   8.5    0s
*  496   161              15       8.0000000    1.00000  87.5%  13.4    0s

Cutting planes:
  Cover: 314

Explored 702 nodes (25695 simplex iterations) in 0.45 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.000000000000e+00, best bound 8.000000000000e+00, gap 0.0%