Gurobi 5.0.1 (linux64) logging started Sat Dec  8 03:30:29 2012

Optimize a model with 555 rows, 540 columns and 1774 nonzeros
Presolve removed 58 rows and 34 columns
Presolve time: 0.01s
Presolved: 497 rows, 506 columns, 1638 nonzeros
Variable types: 336 continuous, 170 integer (170 binary)

Root relaxation: objective 4.719956e+04, 247 iterations, 0.00 seconds

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

     0     0 47199.5586    0   88          - 47199.5586     -      -    0s
H    0     0                    78782.000000 47199.5586  40.1%     -    0s
H    0     0                    78568.000000 47199.5586  39.9%     -    0s
     0     0 59562.2137    0   13 78568.0000 59562.2137  24.2%     -    0s
H    0     0                    65144.966719 59562.2137  8.57%     -    0s
     0     0 59777.1102    0    5 65144.9667 59777.1102  8.24%     -    0s
H    0     0                    60794.084646 59777.1102  1.67%     -    0s
     0     0 59825.3357    0    3 60794.0846 59825.3357  1.59%     -    0s
H    0     0                    59942.000000 59825.3357  0.19%     -    0s
     0     0 59825.3357    0   70 59942.0000 59825.3357  0.19%     -    0s
     0     0 59825.3357    0    3 59942.0000 59825.3357  0.19%     -    0s
     0     0 59825.5166    0    4 59942.0000 59825.5166  0.19%     -    0s
     0     2 59825.5308    0    4 59942.0000 59825.5308  0.19%     -    0s
*    9     6               6    59858.000000 59826.7636  0.05%   1.6    0s
*   13     3               3    59836.000000 59832.8296  0.01%   1.5    0s

Cutting planes:
  Gomory: 14
  Cover: 2
  Flow cover: 42
  Flow path: 13

Explored 14 nodes (859 simplex iterations) in 0.36 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.983599999998e+04, best bound 5.983282957437e+04, gap 0.0053%