Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:01:13 2013

Optimize a model with 18963 rows, 18533 columns and 74003 nonzeros
Presolve removed 945 rows and 0 columns
Presolve time: 0.11s
Presolved: 18018 rows, 18533 columns, 72113 nonzeros
Variable types: 18490 continuous, 43 integer (43 binary)

Root relaxation: objective 4.343845e+04, 2624 iterations, 0.19 seconds

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

     0     0 43438.4538    0    3          - 43438.4538     -      -    0s
H    0     0                    43497.000000 43438.4538  0.13%     -    0s
H    0     0                    43443.000000 43438.4538  0.01%     -    0s
     0     0     cutoff    0      43443.0000 43443.0000   0.0%     -    0s

Cutting planes:
  Gomory: 1
  Flow cover: 12

Explored 0 nodes (2648 simplex iterations) in 0.49 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.344300000000e+04, best bound 4.344300000000e+04, gap 0.0%