Gurobi 5.0.1 (linux64) logging started Fri Jan 18 01:47:54 2013

Optimize a model with 3200 rows, 32600 columns and 70050 nonzeros
Presolve removed 100 rows and 150 columns
Presolve time: 0.38s
Presolved: 3100 rows, 32450 columns, 64900 nonzeros
Variable types: 30000 continuous, 2450 integer (2450 binary)

Root relaxation: objective 1.715514e+05, 3875 iterations, 0.22 seconds

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

     0     0 171551.420    0    2          - 171551.420     -      -    0s
     0     0 171553.825    0    1          - 171553.825     -      -    0s
     0     0 171553.825    0    1          - 171553.825     -      -    0s
H    0     0                    171605.61113 171553.825  0.03%     -    0s
     0     1 171569.326    0    1 171605.611 171569.326  0.02%     -    1s
*    6     0               6    171584.76124 171584.761   0.0%   5.7    1s

Cutting planes:
  Flow cover: 2

Explored 7 nodes (3956 simplex iterations) in 1.34 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%