Gurobi 5.0.1 (linux64) logging started Wed Apr 24 00:59:26 2013

Optimize a model with 17261 rows, 16851 columns and 67281 nonzeros
Presolve removed 922 rows and 0 columns
Presolve time: 0.09s
Presolved: 16339 rows, 16851 columns, 65437 nonzeros
Variable types: 16810 continuous, 41 integer (41 binary)

Root relaxation: objective 5.109944e+04, 3292 iterations, 0.21 seconds

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

     0     0 51099.4402    0    2          - 51099.4402     -      -    0s
H    0     0                    51350.000000 51099.4402  0.49%     -    0s
H    0     0                    51151.000000 51099.4402  0.10%     -    0s
     0     0 51101.8825    0    3 51151.0000 51101.8825  0.10%     -    0s
     0     0     cutoff    0      51151.0000 51151.0000   0.0%     -    0s

Cutting planes:
  Gomory: 1
  Flow cover: 3

Explored 0 nodes (3346 simplex iterations) in 0.56 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.115100000000e+04, best bound 5.115100000000e+04, gap 0.0%