Gurobi 5.0.1 (linux64) logging started Thu Jan 17 23:16:27 2013

Optimize a model with 320 rows, 4140 columns and 8380 nonzeros
Presolve removed 20 rows and 20 columns
Presolve time: 0.01s
Presolved: 300 rows, 4120 columns, 8300 nonzeros
Variable types: 4100 continuous, 20 integer (20 binary)

Root relaxation: objective 3.709539e+04, 368 iterations, 0.00 seconds

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

     0     0 37095.3933    0    4          - 37095.3933     -      -    0s
H    0     0                    40547.652845 37095.3933  8.51%     -    0s
     0     0 37133.4780    0    3 40547.6528 37133.4780  8.42%     -    0s
     0     0 37134.0030    0    3 40547.6528 37134.0030  8.42%     -    0s
     0     0 37134.0030    0    3 40547.6528 37134.0030  8.42%     -    0s
     0     0 37135.0042    0    4 40547.6528 37135.0042  8.42%     -    0s
     0     0 37136.4751    0    2 40547.6528 37136.4751  8.41%     -    0s
     0     0 37136.4751    0    2 40547.6528 37136.4751  8.41%     -    0s
     0     0 37136.4751    0    2 40547.6528 37136.4751  8.41%     -    0s
     0     0 37136.4751    0    2 40547.6528 37136.4751  8.41%     -    0s
     0     0 37136.4751    0    2 40547.6528 37136.4751  8.41%     -    0s
     0     2 37137.1317    0    2 40547.6528 37137.1317  8.41%     -    0s
*    4     3               4    37235.483466 37235.4835   0.0%  14.8    0s

Cutting planes:
  Flow cover: 8

Explored 5 nodes (649 simplex iterations) in 0.08 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.723548346646e+04, best bound 3.723548346646e+04, gap 0.0%