Gurobi 5.0.1 (linux64) logging started Fri Jan 18 00:55:18 2013

Optimize a model with 540 rows, 1420 columns and 3610 nonzeros
Presolve removed 30 rows and 20 columns
Presolve time: 0.01s
Presolved: 510 rows, 1400 columns, 3180 nonzeros
Variable types: 1210 continuous, 190 integer (190 binary)

Root relaxation: objective 1.997658e+04, 223 iterations, 0.00 seconds

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

     0     0 19976.5790    0    2          - 19976.5790     -      -    0s
     0     0 20061.9413    0    4          - 20061.9413     -      -    0s
     0     0 20095.2403    0    4          - 20095.2403     -      -    0s
     0     0 20104.3157    0    4          - 20104.3157     -      -    0s
H    0     0                    20158.174631 20104.3157  0.27%     -    0s
     0     0 20104.3157    0    2 20158.1746 20104.3157  0.27%     -    0s
     0     0 20104.3157    0    3 20158.1746 20104.3157  0.27%     -    0s
     0     0 20105.4163    0    3 20158.1746 20105.4163  0.26%     -    0s
     0     2 20110.8039    0    3 20158.1746 20110.8039  0.23%     -    0s

Cutting planes:
  Flow cover: 3

Explored 23 nodes (537 simplex iterations) in 0.08 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.015817463139e+04, best bound 2.015651879540e+04, gap 0.0082%