Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:50:43 2012

Optimize a model with 609 rows, 111 columns and 1218 nonzeros
Presolve removed 228 rows and 0 columns
Presolve time: 0.00s
Presolved: 381 rows, 111 columns, 959 nonzeros
Variable types: 0 continuous, 111 integer (111 binary)
Found heuristic solution: objective 29.0000000

Root relaxation: objective 3.879452e+01, 271 iterations, 0.00 seconds

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

     0     0   38.79452    0  109   29.00000   38.79452  33.8%     -    0s
     0     0   38.00000    0  107   29.00000   38.00000  31.0%     -    0s
H    0     0                      30.0000000   38.00000  26.7%     -    0s
     0     0   38.00000    0  106   30.00000   38.00000  26.7%     -    0s
     0     0   37.98334    0  110   30.00000   37.98334  26.6%     -    0s
     0     0   37.77400    0  111   30.00000   37.77400  25.9%     -    0s
     0     0   37.64554    0  110   30.00000   37.64554  25.5%     -    0s
     0     0   37.50787    0  111   30.00000   37.50787  25.0%     -    0s
     0     0   37.39678    0  110   30.00000   37.39678  24.7%     -    0s
     0     0   37.22763    0  111   30.00000   37.22763  24.1%     -    0s
     0     0   37.14813    0  110   30.00000   37.14813  23.8%     -    0s
     0     0   37.13542    0  110   30.00000   37.13542  23.8%     -    0s
     0     0   37.13542    0  110   30.00000   37.13542  23.8%     -    0s
     0     2   37.13135    0  110   30.00000   37.13135  23.8%     -    0s
*   14    14              10      31.0000000   37.13065  19.8%  43.6    0s
*   49    27              12      32.0000000   36.76886  14.9%  38.7    0s

Cutting planes:
  Zero half: 62

Explored 603 nodes (17416 simplex iterations) in 0.65 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.200000000000e+01, best bound 3.200000000000e+01, gap 0.0%