Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:04:32 2013

Optimize a model with 21666 rows, 21206 columns and 84686 nonzeros
Presolve removed 2319 rows and 0 columns
Presolve time: 0.12s
Presolved: 19347 rows, 21206 columns, 80048 nonzeros
Variable types: 21160 continuous, 46 integer (46 binary)

Root relaxation: objective 4.425481e+04, 3082 iterations, 0.29 seconds

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

     0     0 44254.8132    0    5          - 44254.8132     -      -    0s
H    0     0                    44696.000000 44254.8132  0.99%     -    0s
H    0     0                    44436.000000 44254.8132  0.41%     -    0s
     0     0 44261.2236    0    6 44436.0000 44261.2236  0.39%     -    0s
     0     0 44261.2359    0    6 44436.0000 44261.2359  0.39%     -    0s
     0     0 44261.2500    0    6 44436.0000 44261.2500  0.39%     -    0s
     0     0 44261.2500    0    6 44436.0000 44261.2500  0.39%     -    1s
     0     0 44266.2275    0    3 44436.0000 44266.2275  0.38%     -    1s
     0     0 44266.2275    0    3 44436.0000 44266.2275  0.38%     -    1s
     0     0 44266.2275    0    3 44436.0000 44266.2275  0.38%     -    1s
     0     0 44266.2275    0    3 44436.0000 44266.2275  0.38%     -    1s
     0     2 44270.5758    0    3 44436.0000 44270.5758  0.37%     -    2s
*    3     2               2    44407.000000 44388.0000  0.04%  77.0    2s

Cutting planes:
  Gomory: 1
  Flow cover: 2

Explored 6 nodes (5059 simplex iterations) in 2.20 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.440700000000e+04, best bound 4.440400000000e+04, gap 0.0068%