Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:23:26 2012

Optimize a model with 269 rows, 751 columns and 751 nonzeros
Model has 536 quadratic constraints
Presolve removed 0 rows and 13 columns
Presolve time: 3.13s
Presolved: 269 rows, 738 columns, 738 nonzeros
Variable types: 536 continuous, 202 integer (201 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                     135.0000000          -     -      -    3s
     0     0    0.00000    0   91  135.00000    0.00000   100%     -    3s
     0     0    0.00000    0   16  135.00000    0.00000   100%     -    3s
     0     0    0.00000    0   16  135.00000    0.00000   100%     -    3s
     0     2    0.00000    0   16  135.00000    0.00000   100%     -    3s
H   45    45                      32.0000000    1.75000  94.5%  39.6    3s
*   52    50              40      28.0000000    1.75000  93.8%  37.4    3s
H   75    41                      23.0000000    1.81250  92.1%  34.1    3s
*   76    41              18      22.0000000    1.81250  91.8%  34.1    3s
*  383   164              15      21.0000000    7.39086  64.8%  23.8    3s
   606   216    9.46784   12  451   21.00000    9.46784  54.9%  27.1    5s
*  843   298              45      20.0000000    9.46784  52.7%  40.2    6s
*  846   270              46      19.0000000    9.46784  50.2%  40.2    6s
* 1313   141              41      18.0000000   12.73070  29.3%  39.6    7s

Explored 1795 nodes (69739 simplex iterations) in 8.65 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%