Gurobi 5.0.1 (linux64) logging started Sun Nov 18 07:09:15 2012

Optimize a model with 256 rows, 736 columns and 736 nonzeros
Model has 510 quadratic constraints
Presolve removed 0 rows and 18 columns
Presolve time: 2.98s
Presolved: 256 rows, 718 columns, 718 nonzeros
Variable types: 510 continuous, 208 integer (207 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          -     -      -    2s
     0     0    0.00000    0    3  129.00000    0.00000   100%     -    2s
     0     0    0.00000    0    6  129.00000    0.00000   100%     -    3s
     0     0    0.00000    0   72  129.00000    0.00000   100%     -    3s
     0     2    0.00000    0   72  129.00000    0.00000   100%     -    3s
H   51    51                      26.0000000    1.25397  95.2%  35.3    3s
H   54    54                      25.0000000    1.25397  95.0%  36.5    3s
*  184   118              39      24.0000000    1.58333  93.4%  23.6    3s
H  217   115                      23.0000000    1.60484  93.0%  21.9    3s
H  249    95                      20.0000000    2.33333  88.3%  21.2    3s
*  504   162              63      19.0000000    3.61988  80.9%  19.8    3s
*  680   241              32      17.0000000    4.00000  76.5%  30.1    4s
   683   235    4.00000   15  447   17.00000    4.00000  76.5%  30.3    5s
H  800   231                      16.0000000    5.83598  63.5%  37.5   15s
*  872   229              37      15.0000000    5.83598  61.1%  39.2   15s

Explored 1448 nodes (54965 simplex iterations) in 17.00 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.500000000000e+01, best bound 1.500000000000e+01, gap 0.0%