Gurobi 5.0.1 (linux64) logging started Thu Jan 17 23:43:55 2013

Optimize a model with 420 rows, 4260 columns and 8800 nonzeros
Presolve removed 40 rows and 40 columns
Presolve time: 0.01s
Presolved: 380 rows, 4220 columns, 8660 nonzeros
Variable types: 4140 continuous, 80 integer (80 binary)

Root relaxation: objective 3.894400e+04, 553 iterations, 0.01 seconds

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

     0     0 38944.0027    0    2          - 38944.0027     -      -    0s
     0     0 39019.7945    0    2          - 39019.7945     -      -    0s
     0     0 39024.2973    0    2          - 39024.2973     -      -    0s
     0     0 39027.2907    0    2          - 39027.2907     -      -    0s
     0     0 39032.5366    0    2          - 39032.5366     -      -    0s
     0     0 39032.6154    0    2          - 39032.6154     -      -    0s
     0     0 39032.6154    0    2          - 39032.6154     -      -    0s
H    0     0                    42782.457998 39032.6154  8.76%     -    0s
     0     2 39033.6395    0    2 42782.4580 39033.6395  8.76%     -    0s
*    6     4               5    39243.200957 39238.3214  0.01%  26.8    0s

Cutting planes:
  Flow cover: 7

Explored 9 nodes (871 simplex iterations) in 0.17 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.924320095727e+04, best bound 3.924320095727e+04, gap 0.0%