Gurobi 5.0.1 (linux64) logging started Fri Jan 18 00:16:12 2013

Optimize a model with 520 rows, 4460 columns and 9500 nonzeros
Presolve removed 40 rows and 40 columns
Presolve time: 0.02s
Presolved: 480 rows, 4420 columns, 9360 nonzeros
Variable types: 4240 continuous, 180 integer (180 binary)

Root relaxation: objective 4.013975e+04, 471 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
     0     0 40143.6152    0    2          - 40143.6152     -      -    0s
     0     0 40143.6954    0    2          - 40143.6954     -      -    0s
     0     0 40143.6954    0    2          - 40143.6954     -      -    0s
     0     0 40143.6954    0    2          - 40143.6954     -      -    0s
H    0     0                    40194.499543 40143.6954  0.13%     -    0s
     0     1 40159.0551    0    1 40194.4995 40159.0551  0.09%     -    0s

Cutting planes:
  Gomory: 2
  Flow cover: 3

Explored 3 nodes (600 simplex iterations) in 0.11 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%