Gurobi 5.0.1 (linux64) logging started Thu Jan 17 23:16:34 2013

Optimize a model with 280 rows, 4100 columns and 8200 nonzeros
Presolve removed 20 rows and 20 columns
Presolve time: 0.00s
Presolved: 320 rows, 4120 columns, 8260 nonzeros
Variable types: 4080 continuous, 40 integer (40 binary)

Root relaxation: objective 3.709539e+04, 444 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    8          - 37095.3933     -      -    0s
H    0     0                    37999.647766 37095.3933  2.38%     -    0s
     0     0 37133.1817    0    6 37999.6478 37133.1817  2.28%     -    0s
     0     0 37133.7067    0    6 37999.6478 37133.7067  2.28%     -    0s
     0     0 37133.7067    0    6 37999.6478 37133.7067  2.28%     -    0s
     0     0 37135.2069    0    8 37999.6478 37135.2069  2.27%     -    0s
     0     0 37135.8556    0    6 37999.6478 37135.8556  2.27%     -    0s
     0     0 37135.9890    0    6 37999.6478 37135.9890  2.27%     -    0s
     0     0 37135.9890    0    6 37999.6478 37135.9890  2.27%     -    0s
     0     0 37135.9890    0    6 37999.6478 37135.9890  2.27%     -    0s
     0     0 37135.9890    0    6 37999.6478 37135.9890  2.27%     -    0s
     0     0 37135.9890    0    6 37999.6478 37135.9890  2.27%     -    0s
     0     0 37135.9890    0    6 37999.6478 37135.9890  2.27%     -    0s
     0     2 37136.7212    0    6 37999.6478 37136.7212  2.27%     -    0s
*    3     3               3    37235.483466 37235.4835   0.0%  23.7    0s

Cutting planes:
  Flow cover: 13

Explored 4 nodes (775 simplex iterations) in 0.11 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%