Gurobi 5.0.1 (linux64) logging started Sun Nov 18 01:02:15 2012

Optimize a model with 147 rows, 348 columns and 348 nonzeros
Model has 292 quadratic constraints
Presolve time: 1.69s
Presolved: 147 rows, 348 columns, 348 nonzeros
Variable types: 292 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                      80.0000000          -     -      -    1s
     0     0    0.00000    0   31   80.00000    0.00000   100%     -    1s
     0     0    0.03571    0   40   80.00000    0.03571   100%     -    1s
     0     0    0.03571    0   38   80.00000    0.03571   100%     -    1s
     0     2    0.03571    0   38   80.00000    0.03571   100%     -    1s
*   31    31              21      38.0000000    7.26298  80.9%  36.5    1s
*   58    44              18      33.0000000    8.00000  75.8%  32.3    1s
H 1973   363                      32.0000000   22.14286  30.8%  24.5    3s
* 2453   312              29      31.0000000   24.19355  22.0%  23.1    4s

Explored 3188 nodes (68450 simplex iterations) in 4.94 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%