Gurobi 5.0.1 (linux64) logging started Sun Nov 18 07:23:08 2012

Optimize a model with 269 rows, 764 columns and 764 nonzeros
Model has 536 quadratic constraints
Presolve removed 0 rows and 18 columns
Presolve time: 3.13s
Presolved: 269 rows, 746 columns, 746 nonzeros
Variable types: 536 continuous, 210 integer (209 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                     133.0000000          -     -      -    3s
     0     0    0.00000    0  139  133.00000    0.00000   100%     -    3s
     0     0    0.08237    0  191  133.00000    0.08237   100%     -    3s
     0     2    0.12741    0  191  133.00000    0.12741   100%     -    3s
H   54    54                      26.0000000    1.27692  95.1%  39.4    3s
*   55    55              31      23.0000000    1.27692  94.4%  40.3    3s
*   90    78              22      21.0000000    1.34426  93.6%  39.0    3s
H  162   113                      19.0000000    2.47879  87.0%  34.9    3s
   601   276   10.64652    7  191   19.00000    6.51761  65.7%  30.9    5s
  2040   468   17.57437   43  409   19.00000   11.52653  39.3%  36.1   10s
* 2544   484              48      18.0000000   12.25146  31.9%  34.0   10s
  4281   153   16.84615   37  444   18.00000   15.64889  13.1%  32.9   15s

Explored 4495 nodes (148820 simplex iterations) in 15.81 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%