Gurobi 5.0.1 (linux64) logging started Fri Jan 18 04:30:21 2013

Optimize a model with 1500 rows, 51100 columns and 270850 nonzeros
Presolve removed 50 rows and 5650 columns
Presolve time: 0.44s
Presolved: 1450 rows, 45450 columns, 250850 nonzeros
Variable types: 45050 continuous, 400 integer (400 binary)

Root relaxation: objective 1.715514e+05, 2948 iterations, 0.13 seconds

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

     0     0 171551.420    0   10          - 171551.420     -      -    0s
     0     0 171552.325    0   10          - 171552.325     -      -    1s
     0     0 171552.325    0   10          - 171552.325     -      -    1s
     0     0 171552.325    0   10          - 171552.325     -      -    1s
     0     0 171552.325    0   10          - 171552.325     -      -    1s
H    0     0                    171610.01199 171552.325  0.03%     -    1s
     0     1 171569.326    0    5 171610.012 171569.326  0.02%     -    2s
*    4     0               4    171584.76124 171584.761   0.0%  84.8    2s

Cutting planes:
  Flow cover: 4

Explored 5 nodes (4226 simplex iterations) in 2.42 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.715847612416e+05, best bound 1.715847612416e+05, gap 0.0%