Gurobi 5.0.1 (linux64) logging started Fri Jan 18 00:16:16 2013

Optimize a model with 440 rows, 4340 columns and 9520 nonzeros
Presolve removed 20 rows and 20 columns
Presolve time: 0.01s
Presolved: 420 rows, 4320 columns, 9300 nonzeros
Variable types: 4240 continuous, 80 integer (80 binary)

Root relaxation: objective 4.013975e+04, 462 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    6          - 40139.7487     -      -    0s
     0     0 40139.7487    0    6          - 40139.7487     -      -    0s
     0     0 40139.7487    0    6          - 40139.7487     -      -    0s
     0     0 40140.8321    0    6          - 40140.8321     -      -    0s
     0     0 40140.8321    0    6          - 40140.8321     -      -    0s
H    0     0                    40194.499543 40140.8321  0.13%     -    0s
     0     1 40147.7455    0    6 40194.4995 40147.7455  0.12%     -    0s

Cutting planes:
  Flow cover: 4

Explored 3 nodes (914 simplex iterations) in 0.10 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.019449954342e+04, best bound 4.019075596039e+04, gap 0.0093%