Gurobi 5.0.1 (linux64) logging started Fri Jan 18 00:15:47 2013

Optimize a model with 220 rows, 1170 columns and 2760 nonzeros
Presolve removed 10 rows and 10 columns
Presolve time: 0.00s
Presolved: 210 rows, 1160 columns, 2650 nonzeros
Variable types: 1120 continuous, 40 integer (40 binary)

Root relaxation: objective 1.937272e+04, 117 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 19382.5564    0    8          - 19382.5564     -      -    0s
     0     0 19383.2709    0    8          - 19383.2709     -      -    0s
     0     0 19450.3111    0    4          - 19450.3111     -      -    0s
H    0     0                    19530.953166 19450.3111  0.41%     -    0s
H    0     0                    19512.982017 19450.3111  0.32%     -    0s
     0     1 19508.0303    0    4 19512.9820 19508.0303  0.03%     -    0s

Cutting planes:
  Flow cover: 2

Explored 6 nodes (253 simplex iterations) in 0.07 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.951298201724e+04, best bound 1.951165669640e+04, gap 0.0068%