Gurobi 5.0.1 (linux64) logging started Sun Nov 18 07:50:41 2012

Optimize a model with 272 rows, 774 columns and 774 nonzeros
Model has 542 quadratic constraints
Presolve removed 0 rows and 21 columns
Presolve time: 3.16s
Presolved: 272 rows, 753 columns, 753 nonzeros
Variable types: 542 continuous, 211 integer (210 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                     134.0000000          -     -      -    3s
     0     0    0.00000    0  157  134.00000    0.00000   100%     -    3s
     0     0    0.24623    0  195  134.00000    0.24623   100%     -    3s
     0     2    0.25755    0  195  134.00000    0.25755   100%     -    3s
H   27    27                      69.0000000    1.30508  98.1%  39.1    3s
H   50    50                      23.0000000    1.30508  94.3%  30.2    3s
*   53    49              27      21.0000000    1.30508  93.8%  31.7    3s
*  335   159              11      20.0000000    7.30977  63.5%  31.7    3s
   606   236    9.61029   14  454   20.00000    9.61029  51.9%  34.8    5s
* 1310   288              39      19.0000000    9.61029  49.4%  42.2    7s
  2280   243     cutoff   37        19.00000   13.72052  27.8%  39.4   10s

Explored 3061 nodes (118794 simplex iterations) in 11.84 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%