Gurobi 5.0.1 (linux64) logging started Wed Apr 24 00:59:29 2013

Optimize a model with 17261 rows, 16851 columns and 67281 nonzeros
Presolve removed 566 rows and 0 columns
Presolve time: 0.09s
Presolved: 16695 rows, 16851 columns, 66149 nonzeros
Variable types: 16810 continuous, 41 integer (41 binary)

Root relaxation: objective 5.007471e+04, 3074 iterations, 0.19 seconds

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

     0     0 50074.7085    0    2          - 50074.7085     -      -    0s
H    0     0                    50136.000000 50074.7085  0.12%     -    0s
     0     0 50080.9921    0    2 50136.0000 50080.9921  0.11%     -    0s
H    0     0                    50107.000000 50080.9921  0.05%     -    0s
     0     0 50080.9921    0    2 50107.0000 50080.9921  0.05%     -    0s
     0     0 50080.9921    0    2 50107.0000 50080.9921  0.05%     -    0s
     0     0 50085.5455    0    1 50107.0000 50085.5455  0.04%     -    0s
     0     0 50086.8512    0    2 50107.0000 50086.8512  0.04%     -    0s
     0     0 50094.1154    0    2 50107.0000 50094.1154  0.03%     -    0s
     0     0 50094.1154    0    2 50107.0000 50094.1154  0.03%     -    0s

Cutting planes:
  Gomory: 3
  Flow cover: 1

Explored 0 nodes (4147 simplex iterations) in 0.78 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.010700000000e+04, best bound 5.010700000000e+04, gap 0.0%