Gurobi 5.0.1 (linux64) logging started Sat Nov 17 19:53:26 2012

Optimize a model with 82 rows, 181 columns and 181 nonzeros
Model has 162 quadratic constraints
Presolve time: 0.94s
Presolved: 82 rows, 181 columns, 181 nonzeros
Variable types: 162 continuous, 19 integer (19 binary)

Root relaxation: objective 0.000000e+00, 9 iterations, 0.00 seconds

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

H    0     0                      45.0000000          -     -      -    0s
     0     0    0.00000    0   16   45.00000    0.00000   100%     -    0s
     0     0    0.40132    0   19   45.00000    0.40132  99.1%     -    0s
     0     2    0.81250    0   19   45.00000    0.81250  98.2%     -    0s
*   27    27              15      39.0000000    4.62109  88.2%  18.4    0s
*   33    25              16      38.0000000    4.62109  87.8%  15.8    0s
H   49    37                      33.0000000    4.62500  86.0%  17.9    0s
*  136    80              13      32.0000000    8.59263  73.1%  21.1    1s
*  274    88              12      31.0000000   14.72109  52.5%  19.5    1s

Cutting planes:
  Gomory: 2

Explored 773 nodes (13757 simplex iterations) in 1.23 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.100000000000e+01, best bound 3.100000000000e+01, gap 0.0%