Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:33:02 2012

Optimize a model with 168 rows, 411 columns and 411 nonzeros
Model has 334 quadratic constraints
Presolve time: 1.95s
Presolved: 168 rows, 411 columns, 411 nonzeros
Variable types: 334 continuous, 77 integer (77 binary)

Root relaxation: objective 0.000000e+00, 38 iterations, 0.00 seconds

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

H    0     0                      90.0000000          -     -      -    1s
     0     0    0.00000    0   73   90.00000    0.00000   100%     -    1s
     0     0    0.48571    0   76   90.00000    0.48571  99.5%     -    1s
     0     2    0.65125    0   76   90.00000    0.65125  99.3%     -    2s
H   27    27                      76.0000000    5.06667  93.3%  34.7    2s
*   42    42              23      38.0000000    5.06667  86.7%  32.1    2s
*   43    41              24      37.0000000    5.06667  86.3%  31.9    2s
*   72    60              19      36.0000000    5.13559  85.7%  37.0    2s
*  228   124              15      35.0000000   10.50000  70.0%  37.3    2s
*  423   175              17      34.0000000   15.91667  53.2%  32.8    2s
*  448   164              16      32.0000000   15.94915  50.2%  32.2    2s
  1991   599   19.22388   31  251   32.00000   16.66667  47.9%  27.9    5s
* 2288   672              39      31.0000000   17.83333  42.5%  26.7    5s
  4790   887   23.38235   38  242   31.00000   22.50000  27.4%  23.3   10s
  8014   182     cutoff   39        31.00000   28.00000  9.68%  21.6   15s

Explored 8278 nodes (176818 simplex iterations) in 15.18 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%