Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:03:25 2013

Optimize a model with 20745 rows, 20295 columns and 81045 nonzeros
Presolve removed 1148 rows and 0 columns
Presolve time: 0.12s
Presolved: 19597 rows, 20295 columns, 78749 nonzeros
Variable types: 20250 continuous, 45 integer (45 binary)

Root relaxation: objective 4.722876e+04, 3581 iterations, 0.28 seconds

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

     0     0 47228.7586    0    1          - 47228.7586     -      -    0s
H    0     0                    47266.000000 47228.7586  0.08%     -    0s
     0     0 47228.8778    0    2 47266.0000 47228.8778  0.08%     -    0s
     0     0 47228.8778    0    1 47266.0000 47228.8778  0.08%     -    0s
     0     0 47228.8778    0    2 47266.0000 47228.8778  0.08%     -    0s
     0     0 47228.8778    0    2 47266.0000 47228.8778  0.08%     -    0s
     0     0     cutoff    0      47266.0000 47266.0000   0.0%     -    1s

Cutting planes:
  Gomory: 1
  Flow cover: 2

Explored 0 nodes (4905 simplex iterations) in 1.01 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.726600000000e+04, best bound 4.726600000000e+04, gap 0.0%