Gurobi 5.0.1 (linux64) logging started Sun Nov 18 07:58:14 2012

Optimize a model with 275 rows, 781 columns and 781 nonzeros
Model has 548 quadratic constraints
Presolve removed 0 rows and 18 columns
Presolve time: 3.19s
Presolved: 275 rows, 763 columns, 763 nonzeros
Variable types: 548 continuous, 215 integer (214 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                     147.0000000          -     -      -    3s
     0     0    0.00000    0   66  147.00000    0.00000   100%     -    3s
     0     0    0.00000    0   95  147.00000    0.00000   100%     -    3s
     0     0    0.00000    0   70  147.00000    0.00000   100%     -    3s
     0     2    0.00000    0    2  147.00000    0.00000   100%     -    3s
H   40    40                      22.0000000    0.35231  98.4%  45.9    3s
*   55    55              39      21.0000000    0.35231  98.3%  37.5    3s
H  228   146                      20.0000000    2.00000  90.0%  29.5    3s
   606   295    5.41898   12  475   20.00000    5.41898  72.9%  29.8    5s
*  976   349              51      19.0000000    7.25728  61.8%  41.2    6s
  2298   285     cutoff   38        19.00000   12.85055  32.4%  36.6   10s
* 3259   211              39      18.0000000   14.17730  21.2%  36.2   14s
  3364   186   16.93642   34  477   18.00000   14.39185  20.0%  35.9   15s

Explored 3781 nodes (135903 simplex iterations) in 17.62 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%