Gurobi 5.0.1 (linux64) logging started Sun Nov 18 07:02:54 2012

Optimize a model with 253 rows, 729 columns and 729 nonzeros
Model has 504 quadratic constraints
Presolve removed 0 rows and 17 columns
Presolve time: 2.95s
Presolved: 253 rows, 712 columns, 712 nonzeros
Variable types: 504 continuous, 208 integer (207 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                     129.0000000          -     -      -    2s
     0     0    0.00000    0   87  129.00000    0.00000   100%     -    2s
     0     0    0.00000    0   89  129.00000    0.00000   100%     -    2s
     0     0    0.00000    0   87  129.00000    0.00000   100%     -    3s
     0     2    0.00000    0   87  129.00000    0.00000   100%     -    3s
H   37    37                      20.0000000    1.68363  91.6%  41.5    3s
*   39    29              30      19.0000000    1.68363  91.1%  39.6    3s
*  219   111              29      18.0000000    6.20628  65.5%  22.3    3s
   679   310    8.77005   21  422   18.00000    8.77005  51.3%  27.0    5s
*  782   343              46      17.0000000    8.77005  48.4%  31.5    5s
H 2245   500                      16.0000000    8.77005  45.2%  32.5    8s
H 2381   447                      15.0000000    8.77005  41.5%  33.1    9s
  2691   457   13.98780   37  389   15.00000    9.41723  37.2%  33.4   10s
  3408   373   13.57576   41  392   15.00000   10.66667  28.9%  36.1   15s

Explored 4491 nodes (165125 simplex iterations) in 19.42 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.500000000000e+01, best bound 1.500000000000e+01, gap 0.0%