Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:10:22 2013

Optimize a model with 25550 rows, 25050 columns and 100050 nonzeros
Presolve removed 1861 rows and 0 columns
Presolve time: 0.14s
Presolved: 23689 rows, 25050 columns, 96328 nonzeros
Variable types: 25000 continuous, 50 integer (50 binary)

Root relaxation: objective 5.317932e+04, 4148 iterations, 0.40 seconds

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

     0     0 53179.3185    0    2          - 53179.3185     -      -    0s
H    0     0                    53549.000000 53179.3185  0.69%     -    0s
H    0     0                    53215.000000 53179.3185  0.07%     -    0s
     0     0 53179.9798    0    3 53215.0000 53179.9798  0.07%     -    0s
     0     0 53179.9798    0    2 53215.0000 53179.9798  0.07%     -    1s
     0     0 53179.9798    0    3 53215.0000 53179.9798  0.07%     -    1s
     0     0 53179.9798    0    3 53215.0000 53179.9798  0.07%     -    1s
     0     0 53180.3621    0    3 53215.0000 53180.3621  0.07%     -    1s
     0     0     cutoff    0      53215.0000 53215.0000   0.0%     -    1s

Cutting planes:
  Gomory: 1
  Flow cover: 4

Explored 0 nodes (5598 simplex iterations) in 1.47 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.321500000000e+04, best bound 5.321500000000e+04, gap 0.0%