Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:00:30 2013

Optimize a model with 462 rows, 17682 columns and 35322 nonzeros
Presolve time: 0.03s
Presolved: 462 rows, 17682 columns, 35322 nonzeros
Variable types: 17640 continuous, 42 integer (42 binary)

Root relaxation: objective 4.075672e+04, 754 iterations, 0.02 seconds

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

     0     0 40756.7209    0    4          - 40756.7209     -      -    0s
H    0     0                    41324.000000 40756.7209  1.37%     -    0s
     0     0 41106.3600    0    2 41324.0000 41106.3600  0.53%     -    0s
     0     0 41127.1023    0    2 41324.0000 41127.1023  0.48%     -    0s
     0     0 41127.1023    0    2 41324.0000 41127.1023  0.48%     -    0s
     0     0 41127.1023    0    2 41324.0000 41127.1023  0.48%     -    0s
     0     0 41130.8895    0    2 41324.0000 41130.8895  0.47%     -    0s
H    0     0                    41276.000000 41130.8895  0.35%     -    0s
     0     0 41130.8895    0    2 41276.0000 41130.8895  0.35%     -    0s
     0     0 41253.6667    0    1 41276.0000 41253.6667  0.05%     -    0s
     0     0 41274.7000    0    1 41276.0000 41274.7000  0.00%     -    0s

Cutting planes:
  Implied bound: 41
  Flow cover: 1

Explored 0 nodes (955 simplex iterations) in 0.29 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.127600000000e+04, best bound 4.127470000000e+04, gap 0.0031%