Gurobi 5.0.1 (linux64) logging started Mon Feb  4 19:02:04 2013

Optimize a model with 50183 rows, 4489 columns and 152626 nonzeros
Presolve removed 3262 rows and 2259 columns
Presolve time: 0.38s
Presolved: 46921 rows, 2230 columns, 143001 nonzeros
Variable types: 35 continuous, 2195 integer (2195 binary)
Found heuristic solution: objective 84347.000000

Root relaxation: objective 5.896769e+04, 16333 iterations, 1.37 seconds

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

     0     0 58967.6923    0   14 84347.0000 58967.6923  30.1%     -    2s
H    0     0                    58992.000000 58967.6923  0.04%     -    2s
H    0     0                    58982.000000 58967.6923  0.02%     -    2s
H    0     0                    58977.000000 58967.6923  0.02%     -    2s
     0     0 58968.0000    0   23 58977.0000 58968.0000  0.02%     -    2s
     0     0 58968.0000    0   19 58977.0000 58968.0000  0.02%     -    2s
H    0     0                    58976.000000 58968.0000  0.01%     -    2s
     0     0 58968.0000    0   23 58976.0000 58968.0000  0.01%     -    2s
     0     2 58968.0000    0   23 58976.0000 58968.0000  0.01%     -    2s
H  205   132                    58975.000000 58969.2308  0.01%  31.4    3s

Cutting planes:
  Gomory: 3
  Cover: 1
  Implied bound: 2
  MIR: 37
  Zero half: 21

Explored 205 nodes (27091 simplex iterations) in 3.94 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.897500000000e+04, best bound 5.897000000000e+04, gap 0.0085%