Gurobi 5.0.1 (linux64) logging started Fri Jan 18 04:04:47 2013

Optimize a model with 300 rows, 3110 columns and 22280 nonzeros
Presolve removed 10 rows and 10 columns
Presolve time: 0.03s
Presolved: 290 rows, 3100 columns, 20270 nonzeros
Variable types: 3020 continuous, 80 integer (80 binary)

Root relaxation: objective 1.937272e+04, 124 iterations, 0.00 seconds

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

     0     0 19372.7157    0    6          - 19372.7157     -      -    0s
     0     0 19373.2416    0    6          - 19373.2416     -      -    0s
     0     0 19445.1933    0    6          - 19445.1933     -      -    0s
     0     0 19445.1933    0    6          - 19445.1933     -      -    0s
     0     2 19445.2991    0    6          - 19445.2991     -      -    0s
*   21    12              16    19561.530675 19445.5063  0.59%   7.1    0s
*   37    12              13    19513.955128 19507.0929  0.04%   5.2    0s

Cutting planes:
  Flow cover: 1

Explored 47 nodes (528 simplex iterations) in 0.29 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.951395512775e+04, best bound 1.951280245232e+04, gap 0.0059%