Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:42:13 2012

Optimize a model with 247 rows, 712 columns and 712 nonzeros
Model has 492 quadratic constraints
Presolve removed 0 rows and 25 columns
Presolve time: 2.87s
Presolved: 247 rows, 687 columns, 687 nonzeros
Variable types: 492 continuous, 195 integer (194 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                     128.0000000          -     -      -    2s
     0     0    0.00000    0  109  128.00000    0.00000   100%     -    2s
     0     0    0.00000    0  176  128.00000    0.00000   100%     -    2s
     0     0    0.00000    0  138  128.00000    0.00000   100%     -    2s
     0     2    0.00000    0  138  128.00000    0.00000   100%     -    2s
H   54    54                      19.0000000    2.36667  87.5%  32.0    3s
*   77    58              47      18.0000000    2.36667  86.9%  31.3    3s
*  261   135              28      17.0000000    5.72231  66.3%  22.5    3s
   688   251   11.08844   20  576   17.00000    9.00000  47.1%  33.6    5s
  2591   427   11.86592   37  420   17.00000    9.66197  43.2%  40.5   10s
  5517   737     cutoff   37        17.00000   12.64516  25.6%  32.8   15s
* 8202   312              50      16.0000000   14.07956  12.0%  29.5   19s

Explored 8546 nodes (251132 simplex iterations) in 19.54 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.600000000000e+01, best bound 1.600000000000e+01, gap 0.0%