Gurobi 5.0.1 (linux64) logging started Sun Nov 18 01:01:48 2012

Optimize a model with 146 rows, 346 columns and 346 nonzeros
Model has 290 quadratic constraints
Presolve time: 1.69s
Presolved: 146 rows, 346 columns, 346 nonzeros
Variable types: 290 continuous, 56 integer (56 binary)

Root relaxation: objective 0.000000e+00, 28 iterations, 0.00 seconds

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

H    0     0                      74.0000000          -     -      -    1s
     0     0    0.00000    0   54   74.00000    0.00000   100%     -    1s
     0     0    0.68421    0   56   74.00000    0.68421  99.1%     -    1s
     0     0    0.68421    0   56   74.00000    0.68421  99.1%     -    1s
     0     2    0.68421    0   56   74.00000    0.68421  99.1%     -    1s
H   40    40                      42.0000000    4.66667  88.9%  31.6    1s
*   42    40              25      41.0000000    4.66667  88.6%  30.9    1s
H  103    77                      36.0000000    9.00000  75.0%  31.8    1s
H  132    93                      35.0000000    9.00000  74.3%  32.2    1s
*  210   123              15      33.0000000   12.60870  61.8%  35.0    1s
  2766   837   27.78723   32  206   33.00000   19.33333  41.4%  27.3    5s
* 6651  1013              38      31.0000000   24.57143  20.7%  22.7    8s

Explored 8611 nodes (184964 simplex iterations) in 9.86 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%