Gurobi 5.0.1 (linux64) logging started Fri Jan 18 01:00:08 2013

Optimize a model with 1800 rows, 27150 columns and 57250 nonzeros
Presolve removed 50 rows and 50 columns
Presolve time: 0.16s
Presolved: 1750 rows, 27100 columns, 56200 nonzeros
Variable types: 26100 continuous, 1000 integer (1000 binary)

Root relaxation: objective 1.715514e+05, 3456 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    4          - 171551.420     -      -    0s
H    0     0                    180645.07166 171551.420  5.03%     -    0s
     0     0 171556.808    0    2 180645.072 171556.808  5.03%     -    0s
     0     0 171556.808    0    2 180645.072 171556.808  5.03%     -    0s
     0     2 171556.808    0    2 180645.072 171556.808  5.03%     -    0s
*   16     6               8    171584.76124 171584.761   0.0%   134    1s

Cutting planes:
  Implied bound: 9
  Flow cover: 1

Explored 17 nodes (6129 simplex iterations) in 1.51 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%