Gurobi 5.0.1 (linux64) logging started Thu Jan 17 23:16:31 2013

Optimize a model with 320 rows, 4120 columns and 8280 nonzeros
Presolve removed 20 rows and 20 columns
Presolve time: 0.01s
Presolved: 300 rows, 4100 columns, 8220 nonzeros
Variable types: 4080 continuous, 20 integer (20 binary)

Root relaxation: objective 3.600389e+04, 403 iterations, 0.00 seconds

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

     0     0 36003.8892    0    2          - 36003.8892     -      -    0s
H    0     0                    38544.555741 36003.8892  6.59%     -    0s
     0     0 36073.7322    0    2 38544.5557 36073.7322  6.41%     -    0s
     0     0 36111.8517    0    2 38544.5557 36111.8517  6.31%     -    0s
     0     0 36121.4035    0    2 38544.5557 36121.4035  6.29%     -    0s
     0     0 36126.2847    0    2 38544.5557 36126.2847  6.27%     -    0s
     0     0 36126.2847    0    2 38544.5557 36126.2847  6.27%     -    0s
     0     0 36127.0751    0    2 38544.5557 36127.0751  6.27%     -    0s
     0     0 36127.5337    0    2 38544.5557 36127.5337  6.27%     -    0s
     0     0 36127.5337    0    2 38544.5557 36127.5337  6.27%     -    0s
     0     0 36127.5337    0    2 38544.5557 36127.5337  6.27%     -    0s
     0     2 36128.6767    0    2 38544.5557 36128.6767  6.27%     -    0s
*    1     1               1    36188.506204 36188.5062   0.0%  59.0    0s

Cutting planes:
  Flow cover: 12

Explored 2 nodes (643 simplex iterations) in 0.08 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.618850620407e+04, best bound 3.618850620407e+04, gap 0.0%