Gurobi 5.0.1 (linux64) logging started Sun Dec  9 06:10:53 2012

Optimize a model with 570 rows, 540 columns and 1792 nonzeros
Presolve removed 22 rows and 14 columns
Presolve time: 0.01s
Presolved: 548 rows, 526 columns, 1736 nonzeros
Variable types: 352 continuous, 174 integer (174 binary)

Root relaxation: objective 5.059056e+04, 259 iterations, 0.00 seconds

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

     0     0 50590.5621    0   81          - 50590.5621     -      -    0s
H    0     0                    79205.000000 50590.5621  36.1%     -    0s
     0     0 58910.4892    0   20 79205.0000 58910.4892  25.6%     -    0s
     0     0 59174.8601    0   10 79205.0000 59174.8601  25.3%     -    0s
     0     0 59233.8788    0    1 79205.0000 59233.8788  25.2%     -    0s
H    0     0                    59321.000000 59233.8788  0.15%     -    0s
     0     2 59234.0709    0    1 59321.0000 59234.0709  0.15%     -    0s
*    9     3               4    59301.000000 59243.0000  0.10%   2.3    0s
*   10     0               1    59243.000000 59243.0000   0.0%   2.2    0s

Cutting planes:
  Gomory: 5
  Cover: 3
  Flow cover: 52
  Flow path: 29

Explored 11 nodes (395 simplex iterations) in 0.05 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.924300000000e+04, best bound 5.924300000000e+04, gap 0.0%