Gurobi 5.0.1 (linux64) logging started Fri Jan 18 00:55:32 2013

Optimize a model with 1080 rows, 4840 columns and 11220 nonzeros
Presolve removed 60 rows and 40 columns
Presolve time: 0.03s
Presolved: 1020 rows, 4800 columns, 10360 nonzeros
Variable types: 4420 continuous, 380 integer (380 binary)

Root relaxation: objective 4.013975e+04, 575 iterations, 0.01 seconds

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

     0     0 40139.7487    0    2          - 40139.7487     -      -    0s
H    0     0                    40202.999861 40139.7487  0.16%     -    0s
H    0     0                    40195.297155 40139.7487  0.14%     -    0s
     0     0 40144.7296    0    1 40195.2972 40144.7296  0.13%     -    0s
     0     0 40144.7296    0    1 40195.2972 40144.7296  0.13%     -    0s
     0     0 40144.7335    0    2 40195.2972 40144.7335  0.13%     -    0s
     0     0 40144.7335    0    2 40195.2972 40144.7335  0.13%     -    0s
     0     0 40144.7335    0    2 40195.2972 40144.7335  0.13%     -    0s
     0     0 40144.7335    0    2 40195.2972 40144.7335  0.13%     -    0s
     0     2 40144.7455    0    2 40195.2972 40144.7455  0.13%     -    0s

Cutting planes:
  Gomory: 1
  Flow cover: 2

Explored 14 nodes (902 simplex iterations) in 0.18 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.019529715470e+04, best bound 4.019274488397e+04, gap 0.0063%