Gurobi 5.0.1 (linux64) logging started Fri Jan 18 05:57:19 2013

Optimize a model with 1600 rows, 76750 columns and 650950 nonzeros
Presolve removed 50 rows and 1250 columns
Presolve time: 1.53s
Presolved: 1550 rows, 75500 columns, 600950 nonzeros
Variable types: 75050 continuous, 450 integer (450 binary)

Root relaxation: objective 1.715514e+05, 2935 iterations, 0.35 seconds

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

     0     0 171551.420    0   14          - 171551.420     -      -    2s
     0     0 171551.782    0   14          - 171551.782     -      -    3s
     0     0 171551.782    0   14          - 171551.782     -      -    3s
H    0     0                    171614.67568 171551.782  0.04%     -    4s
     0     1 171569.326    0    7 171614.676 171569.326  0.03%     -    4s
     1     1 171569.505    1    7 171614.676 171569.505  0.03%   489    5s
*    7     0               7    171584.76124 171584.761   0.0%  75.9    5s

Cutting planes:
  Flow cover: 1

Explored 8 nodes (4417 simplex iterations) in 5.51 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%