Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:14:31 2012

Optimize a model with 255 rows, 718 columns and 718 nonzeros
Model has 508 quadratic constraints
Presolve removed 0 rows and 22 columns
Presolve time: 2.96s
Presolved: 255 rows, 696 columns, 696 nonzeros
Variable types: 508 continuous, 188 integer (187 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                     138.0000000          -     -      -    2s
     0     0    0.00000    0  105  138.00000    0.00000   100%     -    2s
     0     0    0.00000    0  176  138.00000    0.00000   100%     -    3s
     0     0    0.00000    0  154  138.00000    0.00000   100%     -    3s
     0     2    0.00000    0  153  138.00000    0.00000   100%     -    3s
H   40    40                      59.0000000    3.03257  94.9%  39.9    3s
*   65    51              36      21.0000000    3.03257  85.6%  31.8    3s
H  562   218                      20.0000000    8.97902  55.1%  28.2    3s
   714   240    9.69916   11  690   20.00000    9.69916  51.5%  32.1    5s
  2761   687   17.34731   30  418   20.00000   11.98113  40.1%  33.5   10s
  5436   964   18.78049   28  418   20.00000   14.68293  26.6%  30.9   15s
  8320   865   18.62074   30  428   20.00000   16.23765  18.8%  29.1   20s
 11414   124   19.28571   31   40   20.00000   19.20000  4.00%  27.9   25s

Explored 11689 nodes (324401 simplex iterations) in 25.23 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.999999999903e+01, best bound 1.999999999903e+01, gap 0.0%