Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:22:27 2013

Optimize a model with 31976 rows, 31416 columns and 125496 nonzeros
Presolve removed 2727 rows and 0 columns
Presolve time: 0.19s
Presolved: 29249 rows, 31416 columns, 120042 nonzeros
Variable types: 31360 continuous, 56 integer (56 binary)

Root relaxation: objective 5.836408e+04, 5748 iterations, 0.74 seconds

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

     0     0 58364.0840    0    2          - 58364.0840     -      -    1s
H    0     0                    58764.000000 58364.0840  0.68%     -    1s
     0     0 58364.4476    0    3 58764.0000 58364.4476  0.68%     -    1s
     0     0 58364.5899    0    3 58764.0000 58364.5899  0.68%     -    1s
     0     0 58364.5899    0    3 58764.0000 58364.5899  0.68%     -    1s
     0     0 58364.5899    0    3 58764.0000 58364.5899  0.68%     -    1s
     0     2 58367.4447    0    3 58764.0000 58367.4447  0.67%     -    2s
*    9     3               7    58758.000000 58666.5760  0.16%   121    2s

Cutting planes:
  Flow cover: 7

Explored 13 nodes (7475 simplex iterations) in 3.10 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.875800000000e+04, best bound 5.875541726619e+04, gap 0.0044%