Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:03:13 2013

Optimize a model with 20745 rows, 20295 columns and 81045 nonzeros
Presolve removed 677 rows and 0 columns
Presolve time: 0.12s
Presolved: 20068 rows, 20295 columns, 79691 nonzeros
Variable types: 20250 continuous, 45 integer (45 binary)

Root relaxation: objective 5.810972e+04, 4921 iterations, 0.45 seconds

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

     0     0 58109.7173    0    3          - 58109.7173     -      -    0s
H    0     0                    58386.000000 58109.7173  0.47%     -    0s
H    0     0                    58333.000000 58109.7173  0.38%     -    0s
     0     0 58109.9049    0    4 58333.0000 58109.9049  0.38%     -    0s
     0     0 58110.2285    0    5 58333.0000 58110.2285  0.38%     -    0s
     0     0 58110.2919    0    3 58333.0000 58110.2919  0.38%     -    1s
     0     0 58110.2919    0    3 58333.0000 58110.2919  0.38%     -    1s
     0     0 58110.4205    0    2 58333.0000 58110.4205  0.38%     -    1s
     0     2 58111.0000    0    2 58333.0000 58111.0000  0.38%     -    1s
H    4     3                    58298.939394 58214.3323  0.15%  46.8    1s
H    5     3                    58270.538462 58214.3323  0.10%  65.6    1s
*    6     2               5    58244.000000 58214.3323  0.05%  60.8    1s

Cutting planes:
  Flow cover: 6

Explored 9 nodes (5469 simplex iterations) in 1.67 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.824400000000e+04, best bound 5.824000000000e+04, gap 0.0069%