Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:03:20 2013

Optimize a model with 20745 rows, 20295 columns and 81045 nonzeros
Presolve removed 1250 rows and 0 columns
Presolve time: 0.12s
Presolved: 19495 rows, 20295 columns, 78545 nonzeros
Variable types: 20250 continuous, 45 integer (45 binary)

Root relaxation: objective 4.119805e+04, 2602 iterations, 0.21 seconds

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

     0     0 41198.0471    0    3          - 41198.0471     -      -    0s
H    0     0                    41817.000000 41198.0471  1.48%     -    0s
     0     0 41199.7880    0    4 41817.0000 41199.7880  1.48%     -    0s
     0     0 41199.7880    0    4 41817.0000 41199.7880  1.48%     -    0s
     0     0 41199.7880    0    4 41817.0000 41199.7880  1.48%     -    0s
     0     2 41204.3823    0    4 41817.0000 41204.3823  1.46%     -    1s
*    2     2               2    41314.000000 41314.0000   0.0%  80.0    1s

Cutting planes:
  Gomory: 1
  Flow cover: 7

Explored 3 nodes (2791 simplex iterations) in 1.19 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.131400000000e+04, best bound 4.131400000000e+04, gap 0.0%