Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:05:42 2013

Optimize a model with 22607 rows, 22137 columns and 88407 nonzeros
Presolve removed 2185 rows and 0 columns
Presolve time: 0.12s
Presolved: 20422 rows, 22137 columns, 84037 nonzeros
Variable types: 22090 continuous, 47 integer (47 binary)

Root relaxation: objective 5.250473e+04, 4149 iterations, 0.41 seconds

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

     0     0 52504.7288    0    4          - 52504.7288     -      -    0s
H    0     0                    53365.000000 52504.7288  1.61%     -    0s
H    0     0                    53130.000000 52504.7288  1.18%     -    0s
H    0     0                    52634.000000 52504.7288  0.25%     -    0s
     0     0 52507.9762    0    5 52634.0000 52507.9762  0.24%     -    0s
     0     0 52508.8096    0    5 52634.0000 52508.8096  0.24%     -    0s
     0     0 52508.8096    0    5 52634.0000 52508.8096  0.24%     -    1s
     0     2 52516.9065    0    5 52634.0000 52516.9065  0.22%     -    1s

Cutting planes:
  Gomory: 1
  Flow cover: 4

Explored 3 nodes (4521 simplex iterations) in 1.43 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.263400000000e+04, best bound 5.263400000000e+04, gap 0.0%