Gurobi 5.0.1 (linux64) logging started Fri Jan 18 04:02:42 2013

Optimize a model with 428 rows, 1244 columns and 3282 nonzeros
Presolve removed 395 rows and 1141 columns
Presolve time: 0.04s
Presolved: 33 rows, 103 columns, 206 nonzeros
Variable types: 76 continuous, 27 integer (27 binary)

Root relaxation: objective 3.881594e+03, 6 iterations, 0.00 seconds

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

     0     0 3881.59364    0    1          - 3881.59364     -      -    0s
     0     0 3881.86365    0    1          - 3881.86365     -      -    0s
     0     0 3893.87067    0    2          - 3893.87067     -      -    0s
     0     0 3893.87080    0    2          - 3893.87080     -      -    0s
     0     0 3893.88670    0    2          - 3893.88670     -      -    0s
H    0     0                    3893.8998644 3893.88670  0.00%     -    0s

Cutting planes:
  Cover: 2
  Implied bound: 1
  Flow cover: 2

Explored 0 nodes (38 simplex iterations) in 0.05 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.893899864365e+03, best bound 3.893886702111e+03, gap 0.0003%