Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:55:26 2013

Optimize a model with 24857 rows, 2809 columns and 75843 nonzeros
Presolve removed 2112 rows and 1422 columns
Presolve time: 0.19s
Presolved: 22745 rows, 1387 columns, 69385 nonzeros
Variable types: 23 continuous, 1364 integer (1364 binary)
Found heuristic solution: objective 72913.000000

Root relaxation: objective 5.634060e+04, 7015 iterations, 0.43 seconds

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

     0     0 56340.6000    0    6 72913.0000 56340.6000  22.7%     -    0s
H    0     0                    56366.000000 56340.6000  0.05%     -    0s
H    0     0                    56349.000000 56340.6000  0.01%     -    0s
     0     0 56343.5125    0   19 56349.0000 56343.5125  0.01%     -    0s

Cutting planes:
  Gomory: 3
  Implied bound: 1
  MIR: 5

Explored 0 nodes (7128 simplex iterations) in 0.82 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.634900000000e+04, best bound 5.634400000000e+04, gap 0.0089%