Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:50:17 2012

Optimize a model with 277 rows, 774 columns and 774 nonzeros
Model has 552 quadratic constraints
Presolve removed 0 rows and 10 columns
Presolve time: 3.22s
Presolved: 277 rows, 764 columns, 764 nonzeros
Variable types: 552 continuous, 212 integer (211 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          -     -      -    3s
     0     0    0.00000    0   54  129.00000    0.00000   100%     -    3s
     0     0    0.00000    0   65  129.00000    0.00000   100%     -    3s
     0     0    0.00000    0  182  129.00000    0.00000   100%     -    3s
     0     2    0.00000    0  181  129.00000    0.00000   100%     -    3s
H   44    44                      21.0000000    2.33333  88.9%  42.4    3s
   606   306    9.27500   12  458   21.00000    9.27500  55.8%  29.8    5s
  2252   723   16.94118   37  449   21.00000   10.90000  48.1%  39.2   10s
  4555  1421   20.57544   35  377   21.00000   12.98305  38.2%  35.2   15s
  6797  1871   20.49424   37  404   21.00000   14.38696  31.5%  34.8   20s
* 8554  1756              59      20.0000000   15.12500  24.4%  34.1   23s
  9055  1661     cutoff   36        20.00000   15.52705  22.4%  34.3   25s
 10703  1209   18.61677   34  426   20.00000   16.76053  16.2%  34.1   30s
*10779   685              37      19.0000000   16.83333  11.4%  34.2   30s

Explored 11528 nodes (392974 simplex iterations) in 34.16 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.900000000000e+01, best bound 1.900000000000e+01, gap 0.0%