Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:04:29 2013

Optimize a model with 21666 rows, 21206 columns and 84686 nonzeros
Presolve removed 2603 rows and 0 columns
Presolve time: 0.12s
Presolved: 19063 rows, 21206 columns, 79480 nonzeros
Variable types: 21160 continuous, 46 integer (46 binary)

Root relaxation: objective 4.559379e+04, 3176 iterations, 0.29 seconds

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

     0     0 45593.7856    0    4          - 45593.7856     -      -    0s
H    0     0                    45774.000000 45593.7856  0.39%     -    0s
     0     0 45595.6317    0    6 45774.0000 45595.6317  0.39%     -    0s
     0     0 45595.7652    0    6 45774.0000 45595.7652  0.39%     -    0s
H    0     0                    45710.000000 45595.7652  0.25%     -    1s
     0     0 45595.7652    0    3 45710.0000 45595.7652  0.25%     -    1s
     0     0 45596.1848    0    5 45710.0000 45596.1848  0.25%     -    1s
     0     0 45596.1848    0    5 45710.0000 45596.1848  0.25%     -    1s
     0     0 45641.5763    0    3 45710.0000 45641.5763  0.15%     -    1s
     0     2 45647.3810    0    3 45710.0000 45647.3810  0.14%     -    2s
H    2     1                    45700.857143 45650.3021  0.11%  12.0    2s
*    3     2               2    45677.000000 45677.0000   0.0%  19.7    2s

Cutting planes:
  Gomory: 1
  Flow cover: 2

Explored 4 nodes (5084 simplex iterations) in 2.05 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.567700000000e+04, best bound 4.567700000000e+04, gap 0.0%