Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:04:20 2013

Optimize a model with 21666 rows, 21206 columns and 84686 nonzeros
Presolve removed 1566 rows and 0 columns
Presolve time: 0.12s
Presolved: 20100 rows, 21206 columns, 81554 nonzeros
Variable types: 21160 continuous, 46 integer (46 binary)

Root relaxation: objective 4.479847e+04, 3622 iterations, 0.34 seconds

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

     0     0 44798.4723    0    3          - 44798.4723     -      -    0s
H    0     0                    45603.000000 44798.4723  1.76%     -    0s
H    0     0                    45071.000000 44798.4723  0.60%     -    0s
     0     0 44803.2184    0    4 45071.0000 44803.2184  0.59%     -    0s
     0     0 44803.2184    0    4 45071.0000 44803.2184  0.59%     -    0s
     0     2 44818.8831    0    4 45071.0000 44818.8831  0.56%     -    1s
*    4     3               3    44989.000000 44989.0000   0.0%  87.5    1s

Cutting planes:
  Gomory: 1
  Flow cover: 2

Explored 5 nodes (3977 simplex iterations) in 1.28 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.498900000000e+04, best bound 4.498900000000e+04, gap 0.0%