Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:09:08 2012

Optimize a model with 240 rows, 683 columns and 683 nonzeros
Model has 478 quadratic constraints
Presolve removed 0 rows and 21 columns
Presolve time: 2.79s
Presolved: 240 rows, 662 columns, 662 nonzeros
Variable types: 478 continuous, 184 integer (183 binary)

Root relaxation: objective 0.000000e+00, 83 iterations, 0.00 seconds

    Nodes    |    Current Node    |     Objective Bounds      |     Work
 Expl Unexpl |  Obj  Depth IntInf | Incumbent    BestBd   Gap | It/Node Time

H    0     0                     116.0000000          -     -      -    2s
     0     0    0.00000    0    2  116.00000    0.00000   100%     -    2s
     0     0    0.00000    0  122  116.00000    0.00000   100%     -    2s
     0     0    0.00000    0   91  116.00000    0.00000   100%     -    2s
     0     2    0.00000    0   82  116.00000    0.00000   100%     -    2s
H   37    37                      25.0000000    2.32727  90.7%  37.6    3s
H  144   106                      24.0000000    3.60870  85.0%  22.6    3s
H  189   110                      21.0000000    3.94631  81.2%  21.0    3s
H  379   145                      19.0000000    6.35632  66.5%  19.6    3s
*  547   176              25      18.0000000    7.79641  56.7%  19.4    3s
   906   234   10.73494   31  416   18.00000   10.73494  40.4%  27.0    5s

Explored 3712 nodes (103395 simplex iterations) in 9.88 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.800000000000e+01, best bound 1.800000000000e+01, gap 0.0%