Gurobi 5.0.1 (linux64) logging started Sat Nov 17 19:52:15 2012

Optimize a model with 31 rows, 71 columns and 71 nonzeros
Model has 60 quadratic constraints
Presolve time: 0.35s
Presolved: 31 rows, 71 columns, 71 nonzeros
Variable types: 60 continuous, 11 integer (11 binary)

Root relaxation: objective 0.000000e+00, 5 iterations, 0.00 seconds

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

H    0     0                      18.0000000          -     -      -    0s
     0     0    0.00000    0   10   18.00000    0.00000   100%     -    0s
     0     0    0.43636    0   11   18.00000    0.43636  97.6%     -    0s
     0     2    0.46667    0   11   18.00000    0.46667  97.4%     -    0s
*   11    11               7      15.0000000    3.14286  79.0%   8.1    0s
*   20    10               5      13.0000000    3.33333  74.4%   7.7    0s
*   38     9               6      12.0000000    5.00000  58.3%   7.3    0s

Cutting planes:
  Gomory: 2

Explored 56 nodes (463 simplex iterations) in 0.37 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.200000000000e+01, best bound 1.200000000000e+01, gap 0.0%