Gurobi 5.0.1 (linux64) logging started Sun Nov 18 07:46:24 2012

Optimize a model with 287 rows, 803 columns and 803 nonzeros
Model has 572 quadratic constraints
Presolve removed 0 rows and 10 columns
Presolve time: 3.35s
Presolved: 287 rows, 793 columns, 793 nonzeros
Variable types: 572 continuous, 221 integer (220 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                     137.0000000          -     -      -    3s
     0     0    0.00000    0    2  137.00000    0.00000   100%     -    3s
     0     0    0.00000    0    2  137.00000    0.00000   100%     -    3s
     0     0    0.00000    0  122  137.00000    0.00000   100%     -    3s
     0     2    0.00000    0  114  137.00000    0.00000   100%     -    3s
*   31    31              26      26.0000000    3.01887  88.4%  63.1    3s
*  248   192              22      25.0000000    5.12139  79.5%  25.8    3s
   670   395   18.94643   19  584   25.00000    7.67662  69.3%  34.5    5s
*  887   441              55      24.0000000    7.67662  68.0%  37.6    5s
H 1027   420                      23.0000000    8.91429  61.2%  36.8    6s
* 1180   391              39      22.0000000   10.76543  51.1%  36.8    6s
  2225   332   20.43165   29  465   22.00000   14.76074  32.9%  36.7   10s
H 3023   311                      21.0000000   16.00000  23.8%  34.9   14s
  3106   305   19.00000   29  443   21.00000   16.00000  23.8%  35.7   15s
  4068   103   19.92547   28  411   21.00000   18.11570  13.7%  34.5   20s

Explored 4236 nodes (146592 simplex iterations) in 20.54 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.100000000000e+01, best bound 2.100000000000e+01, gap 0.0%