Gurobi 5.0.1 (linux64) logging started Fri Jan 18 08:17:59 2013

Optimize a model with 1700 rows, 75650 columns and 651700 nonzeros
Presolve removed 50 rows and 50 columns
Presolve time: 1.17s
Presolved: 1650 rows, 75600 columns, 601650 nonzeros
Variable types: 75100 continuous, 500 integer (500 binary)

Root relaxation: objective 1.715514e+05, 3143 iterations, 0.30 seconds

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

     0     0 171551.420    0    6          - 171551.420     -      -    1s
     0     0 171551.601    0    6          - 171551.601     -      -    2s
     0     0 171551.601    0    6          - 171551.601     -      -    3s
H    0     0                    171620.66765 171551.601  0.04%     -    3s
     0     1 171569.326    0    3 171620.668 171569.326  0.03%     -    4s
*    6     0               6    171584.76124 171584.761   0.0%  40.2    4s

Cutting planes:
  Flow cover: 2

Explored 7 nodes (3833 simplex iterations) in 4.97 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%