Gurobi 5.0.1 (linux64) logging started Fri Jan 18 01:40:19 2013

Optimize a model with 228 rows, 244 columns and 882 nonzeros
Presolve removed 211 rows and 212 columns
Presolve time: 0.00s
Presolved: 17 rows, 32 columns, 84 nonzeros
Variable types: 26 continuous, 6 integer (6 binary)

Root relaxation: objective 3.881864e+03, 11 iterations, 0.00 seconds

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

     0     0 3881.86365    0    1          - 3881.86365     -      -    0s
H    0     0                    3901.9884853 3881.86365  0.52%     -    0s
*    0     0               0    3893.8897177 3893.88972   0.0%     -    0s

Cutting planes:
  Implied bound: 1
  Flow cover: 2

Explored 0 nodes (14 simplex iterations) in 0.00 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.893889717662e+03, best bound 3.893889717662e+03, gap 0.0%