Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:06:35 2013

Optimize a model with 46988 rows, 46308 columns and 185028 nonzeros
Presolve removed 2603 rows and 0 columns
Presolve time: 0.28s
Presolved: 44385 rows, 46308 columns, 179822 nonzeros
Variable types: 46240 continuous, 68 integer (68 binary)

Root relaxation: objective 8.380255e+04, 9672 iterations, 1.42 seconds

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

     0     0 83802.5518    0    4          - 83802.5518     -      -    1s
H    0     0                    84614.000000 83802.5518  0.96%     -    1s
     0     0 83804.7329    0    5 84614.0000 83804.7329  0.96%     -    2s
     0     0 83804.8379    0    5 84614.0000 83804.8379  0.96%     -    2s
     0     0 83804.8379    0    4 84614.0000 83804.8379  0.96%     -    4s
     0     0 83805.8829    0    4 84614.0000 83805.8829  0.96%     -    4s
H    0     0                    83852.000000 83805.8829  0.05%     -    5s
     0     2 83815.5600    0    3 83852.0000 83815.5600  0.04%     -    5s

Cutting planes:
  Gomory: 1
  Flow cover: 5

Explored 9 nodes (14643 simplex iterations) in 5.87 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.385200000000e+04, best bound 8.385016000000e+04, gap 0.0022%