Gurobi 5.0.1 (linux64) logging started Wed Apr 24 00:59:24 2013

Optimize a model with 17261 rows, 16851 columns and 67281 nonzeros
Presolve removed 1034 rows and 0 columns
Presolve time: 0.09s
Presolved: 16227 rows, 16851 columns, 65213 nonzeros
Variable types: 16810 continuous, 41 integer (41 binary)

Root relaxation: objective 4.176010e+04, 2702 iterations, 0.22 seconds

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

     0     0 41760.0967    0    3          - 41760.0967     -      -    0s
H    0     0                    42674.000000 41760.0967  2.14%     -    0s
H    0     0                    41775.000000 41760.0967  0.04%     -    0s
     0     0 41765.3988    0    4 41775.0000 41765.3988  0.02%     -    0s
     0     0 41766.2546    0    4 41775.0000 41766.2546  0.02%     -    0s
     0     0 41767.2994    0    4 41775.0000 41767.2994  0.02%     -    0s
     0     0 41767.3066    0    4 41775.0000 41767.3066  0.02%     -    0s
     0     0     cutoff    0      41775.0000 41775.0000   0.0%     -    0s

Cutting planes:
  Gomory: 1
  Flow cover: 4

Explored 0 nodes (2752 simplex iterations) in 0.71 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.177500000000e+04, best bound 4.177500000000e+04, gap 0.0%