Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:12:28 2012

Optimize a model with 1 rows, 55 columns and 55 nonzeros
Model has 84 quadratic objective terms
Presolve removed 0 rows and 1 columns
Presolve time: 0.00s
Presolved: 85 rows, 138 columns, 306 nonzeros
Variable types: 0 continuous, 138 integer (137 binary)
Found heuristic solution: objective 30.0000000

Root relaxation: objective 0.000000e+00, 114 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   27   30.00000    0.00000   100%     -    0s
H    0     0                      24.0000000    0.00000   100%     -    0s
     0     0    0.00000    0   23   24.00000    0.00000   100%     -    0s
H    0     0                      22.0000000    0.00000   100%     -    0s
H    0     0                      18.0000000    0.00000   100%     -    0s
     0     0    0.00000    0   56   18.00000    0.00000   100%     -    0s
     0     0    0.00000    0   25   18.00000    0.00000   100%     -    0s
     0     2    0.00000    0   24   18.00000    0.00000   100%     -    0s
H  173   124                      16.0000000    0.00000   100%   6.3    0s
*  183   120              19      15.0000000    0.00000   100%   6.3    0s
*  364   142              12      14.0000000    2.00000  85.7%   9.5    0s
*  378   127              14      13.0000000    2.00000  84.6%   9.9    0s
*  529    64               9      12.0000000    7.00000  41.7%  15.4    0s

Cutting planes:
  Gomory: 2
  Cover: 160

Explored 605 nodes (9605 simplex iterations) in 0.17 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.200000000000e+01, best bound 1.200000000000e+01, gap 0.0%