Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:50:33 2012

Optimize a model with 601 rows, 110 columns and 1202 nonzeros
Presolve removed 208 rows and 0 columns
Presolve time: 0.00s
Presolved: 393 rows, 110 columns, 972 nonzeros
Variable types: 0 continuous, 110 integer (110 binary)
Found heuristic solution: objective 27.0000000

Root relaxation: objective 3.881545e+01, 256 iterations, 0.00 seconds

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

     0     0   38.81545    0  107   27.00000   38.81545  43.8%     -    0s
H    0     0                      28.0000000   38.81545  38.6%     -    0s
     0     0   38.31037    0  106   28.00000   38.31037  36.8%     -    0s
     0     0   38.11823    0  109   28.00000   38.11823  36.1%     -    0s
     0     0   38.01769    0  110   28.00000   38.01769  35.8%     -    0s
H    0     0                      29.0000000   38.01769  31.1%     -    0s
     0     0   37.95916    0  109   29.00000   37.95916  30.9%     -    0s
     0     0   37.83879    0  110   29.00000   37.83879  30.5%     -    0s
H    0     0                      30.0000000   37.83879  26.1%     -    0s
     0     0   37.75786    0  110   30.00000   37.75786  25.9%     -    0s
     0     0   37.74578    0  108   30.00000   37.74578  25.8%     -    0s
     0     0   37.66855    0  108   30.00000   37.66855  25.6%     -    0s
     0     0   37.66674    0  109   30.00000   37.66674  25.6%     -    0s
     0     0   37.66674    0  109   30.00000   37.66674  25.6%     -    0s
     0     2   37.66631    0  109   30.00000   37.66631  25.6%     -    0s
*   98    36               7      31.0000000   36.87187  18.9%  24.8    0s

Explored 3892 nodes (68677 simplex iterations) in 2.45 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%