Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:04:46 2013

Optimize a model with 506 rows, 21206 columns and 42366 nonzeros
Presolve time: 0.03s
Presolved: 506 rows, 21206 columns, 42366 nonzeros
Variable types: 21160 continuous, 46 integer (46 binary)

Root relaxation: objective 4.400596e+04, 700 iterations, 0.01 seconds

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

     0     0 44005.9562    0    7          - 44005.9562     -      -    0s
H    0     0                    44977.000000 44005.9562  2.16%     -    0s
H    0     0                    44696.000000 44005.9562  1.54%     -    0s
     0     0 44224.4857    0    7 44696.0000 44224.4857  1.05%     -    0s
     0     0 44242.6561    0    6 44696.0000 44242.6561  1.01%     -    0s
     0     0 44247.5303    0    7 44696.0000 44247.5303  1.00%     -    0s
     0     0 44255.6562    0    7 44696.0000 44255.6562  0.99%     -    0s
     0     0 44256.3239    0    6 44696.0000 44256.3239  0.98%     -    0s
     0     0 44256.3925    0    5 44696.0000 44256.3925  0.98%     -    0s
     0     2 44275.1897    0    5 44696.0000 44275.1897  0.94%     -    0s
H    9     4                    44532.057692 44393.5400  0.31%  21.8    0s
H   10     4                    44487.201923 44393.5400  0.21%  21.7    0s
*   11     5              10    44436.000000 44393.5400  0.10%  21.5    0s
H   13     2                    44431.144231 44393.5400  0.08%  18.2    0s
*   14     2               9    44425.000000 44393.5400  0.07%  18.4    0s
*   16     2               3    44407.000000 44394.1500  0.03%  19.9    0s

Cutting planes:
  Implied bound: 102
  Flow cover: 7

Explored 19 nodes (1339 simplex iterations) in 0.54 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.440700000000e+04, best bound 4.440700000000e+04, gap 0.0%