Gurobi 5.0.1 (linux64) logging started Sat Nov 17 23:39:52 2012

Optimize a model with 72 rows, 180 columns and 180 nonzeros
Model has 142 quadratic constraints
Presolve time: 0.83s
Presolved: 72 rows, 180 columns, 180 nonzeros
Variable types: 142 continuous, 38 integer (38 binary)

Root relaxation: objective 0.000000e+00, 19 iterations, 0.00 seconds

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

H    0     0                      36.0000000          -     -      -    0s
     0     0    0.00000    0   13   36.00000    0.00000   100%     -    0s
     0     0    0.00000    0   37   36.00000    0.00000   100%     -    0s
     0     0    0.00000    0   37   36.00000    0.00000   100%     -    0s
     0     2    0.00000    0   37   36.00000    0.00000   100%     -    0s
H   24    24                      23.0000000    2.00000  91.3%  30.8    0s
H   27    27                      21.0000000    2.00000  90.5%  28.8    0s
*   30    30              17      18.0000000    2.00000  88.9%  27.1    0s
H   50    31                      14.0000000    2.11111  84.9%  22.8    0s
*   50    27              11      13.0000000    2.11111  83.8%  22.9    0s

Cutting planes:

Explored 252 nodes (4938 simplex iterations) in 0.94 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%