Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:00:22 2013

Optimize a model with 18102 rows, 17682 columns and 70602 nonzeros
Presolve removed 567 rows and 0 columns
Presolve time: 0.10s
Presolved: 17535 rows, 17682 columns, 69468 nonzeros
Variable types: 17640 continuous, 42 integer (42 binary)

Root relaxation: objective 4.088472e+04, 2781 iterations, 0.23 seconds

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

     0     0 40884.7195    0    3          - 40884.7195     -      -    0s
H    0     0                    41316.000000 40884.7195  1.04%     -    0s
H    0     0                    40959.000000 40884.7195  0.18%     -    0s
     0     0 40888.0079    0    4 40959.0000 40888.0079  0.17%     -    0s
     0     0     cutoff    0      40959.0000 40959.0000   0.0%     -    0s

Cutting planes:
  Gomory: 1
  Flow cover: 1

Explored 0 nodes (2859 simplex iterations) in 0.66 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.095900000000e+04, best bound 4.095900000000e+04, gap 0.0%