Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:12:27 2012

Optimize a model with 1 rows, 55 columns and 55 nonzeros
Model has 72 quadratic objective terms
Presolve removed 0 rows and 4 columns
Presolve time: 0.00s
Presolved: 73 rows, 123 columns, 267 nonzeros
Variable types: 0 continuous, 123 integer (122 binary)
Found heuristic solution: objective 23.0000000

Root relaxation: objective 0.000000e+00, 91 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   23.00000    0.00000   100%     -    0s
     0     0    0.00000    0   22   23.00000    0.00000   100%     -    0s
H    0     0                      19.0000000    0.00000   100%     -    0s
H    0     0                      18.0000000    0.00000   100%     -    0s
     0     0    0.00000    0   31   18.00000    0.00000   100%     -    0s
     0     0    0.00000    0   14   18.00000    0.00000   100%     -    0s
H    0     0                      14.0000000    0.00000   100%     -    0s
     0     2    0.00000    0   14   14.00000    0.00000   100%     -    0s
H  108    68                      13.0000000    0.00000   100%   2.7    0s
H  283   157                      12.0000000    0.20000  98.3%   6.4    0s
H  284   149                      11.0000000    0.20000  98.2%   6.4    0s
H  308   114                       9.0000000    1.00000  88.9%   7.1    0s
*  361    76              10       8.0000000    3.00000  62.5%  12.6    0s

Cutting planes:
  Gomory: 1
  Cover: 141

Explored 448 nodes (7903 simplex iterations) in 0.11 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%