Gurobi 5.0.1 (linux64) logging started Thu Jan 17 23:43:59 2013

Optimize a model with 400 rows, 4220 columns and 8760 nonzeros
Presolve removed 20 rows and 20 columns
Presolve time: 0.01s
Presolved: 380 rows, 4200 columns, 8640 nonzeros
Variable types: 4140 continuous, 60 integer (60 binary)

Root relaxation: objective 4.013975e+04, 387 iterations, 0.02 seconds

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

     0     0 40139.7487    0    4          - 40139.7487     -      -    0s
     0     0 40139.7487    0    4          - 40139.7487     -      -    0s
     0     0 40139.7487    0    4          - 40139.7487     -      -    0s
     0     0 40141.0492    0    4          - 40141.0492     -      -    0s
     0     0 40141.0492    0    4          - 40141.0492     -      -    0s
H    0     0                    40192.884408 40141.0492  0.13%     -    0s
     0     1 40147.7455    0    4 40192.8844 40147.7455  0.11%     -    0s

Cutting planes:
  Flow cover: 3

Explored 3 nodes (673 simplex iterations) in 0.17 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.019288440837e+04, best bound 4.018960229249e+04, gap 0.0082%