Gurobi 5.0.1 (linux64) logging started Fri Jan 18 05:39:18 2013

Optimize a model with 320 rows, 11350 columns and 122190 nonzeros
Presolve removed 10 rows and 250 columns
Presolve time: 0.25s
Presolved: 310 rows, 11100 columns, 112190 nonzeros
Variable types: 11010 continuous, 90 integer (90 binary)

Root relaxation: objective 1.937272e+04, 169 iterations, 0.01 seconds

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

     0     0 19372.7157    0   14          - 19372.7157     -      -    0s
     0     0 19372.9261    0   14          - 19372.9261     -      -    0s
     0     0 19444.5528    0   12          - 19444.5528     -      -    0s
     0     0 19444.5528    0   12          - 19444.5528     -      -    0s
     0     2 19444.5636    0   12          - 19444.5636     -      -    1s
*   32    24              29    19578.490138 19444.5636  0.68%   8.4    1s
*   59    25              16    19547.776959 19444.6159  0.53%   6.1    1s
H   63    13                    19515.418316 19444.6159  0.36%   5.7    1s
*   77    16              13    19514.481080 19444.9977  0.36%   5.3    1s
*  158    18              17    19513.940936 19504.7369  0.05%   4.2    2s
*  177    20              16    19513.744346 19505.3643  0.04%   4.0    2s

Cutting planes:
  Flow cover: 1

Explored 199 nodes (1346 simplex iterations) in 2.17 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.951374434571e+04, best bound 1.951291069748e+04, gap 0.0043%