Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:05:39 2012

Optimize a model with 228 rows, 656 columns and 656 nonzeros
Model has 454 quadratic constraints
Presolve removed 0 rows and 15 columns
Presolve time: 2.65s
Presolved: 228 rows, 641 columns, 641 nonzeros
Variable types: 454 continuous, 187 integer (186 binary)

Root relaxation: objective 0.000000e+00, 81 iterations, 0.00 seconds

    Nodes    |    Current Node    |     Objective Bounds      |     Work
 Expl Unexpl |  Obj  Depth IntInf | Incumbent    BestBd   Gap | It/Node Time

H    0     0                     107.0000000          -     -      -    2s
     0     0    0.00000    0   67  107.00000    0.00000   100%     -    2s
     0     0    0.00000    0    2  107.00000    0.00000   100%     -    2s
     0     0    0.00000    0    2  107.00000    0.00000   100%     -    2s
     0     2    0.00000    0  141  107.00000    0.00000   100%     -    2s
H   41    41                      19.0000000    1.66215  91.3%  47.8    2s
*   44    34              27      18.0000000    1.66215  90.8%  45.2    2s
*   93    61              36      17.0000000    1.70285  90.0%  32.5    2s
H  286   122                      16.0000000    3.65260  77.2%  24.3    3s
H  465   151                      15.0000000    4.98484  66.8%  21.0    3s
H  649   186                      13.0000000    6.61685  49.1%  29.0    4s
   801   173    9.28571   17    2   13.00000    7.91358  39.1%  35.9    5s

Explored 1104 nodes (40557 simplex iterations) in 5.71 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.300000000000e+01, best bound 1.300000000000e+01, gap 0.0%