Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:05:34 2013

Optimize a model with 22607 rows, 22137 columns and 88407 nonzeros
Presolve removed 1273 rows and 0 columns
Presolve time: 0.12s
Presolved: 21334 rows, 22137 columns, 85861 nonzeros
Variable types: 22090 continuous, 47 integer (47 binary)

Root relaxation: objective 5.101828e+04, 3012 iterations, 0.25 seconds

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

     0     0 51018.2808    0    3          - 51018.2808     -      -    0s
H    0     0                    51666.000000 51018.2808  1.25%     -    0s
     0     0 51022.3427    0    5 51666.0000 51022.3427  1.25%     -    0s
     0     0 51022.7033    0    5 51666.0000 51022.7033  1.25%     -    0s
     0     2 51023.3182    0    5 51666.0000 51023.3182  1.24%     -    1s
H    4     3                    51315.000000 51111.3636  0.40%  54.0    1s
*    8     3               8    51292.000000 51144.9710  0.29%  54.1    1s
H   10     3                    51243.739496 51147.4074  0.19%  49.7    1s
*   11     2               5    51199.000000 51160.4336  0.08%  54.3    1s

Cutting planes:
  Gomory: 2
  Flow cover: 4

Explored 14 nodes (3708 simplex iterations) in 1.81 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.119900000000e+04, best bound 5.119900000000e+04, gap 0.0%