Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:59:49 2013

Optimize a model with 41727 rows, 3969 columns and 127008 nonzeros
Presolve removed 2944 rows and 2001 columns
Presolve time: 0.29s
Presolved: 38783 rows, 1968 columns, 118209 nonzeros
Variable types: 31 continuous, 1937 integer (1937 binary)
Found heuristic solution: objective 84272.000000

Root relaxation: objective 6.141709e+04, 12107 iterations, 0.95 seconds

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

     0     0 61417.0923    0   10 84272.0000 61417.0923  27.1%     -    1s
H    0     0                    61437.000000 61417.0923  0.03%     -    1s
H    0     0                    61428.000000 61417.0923  0.02%     -    1s
     0     0 61418.8291    0   25 61428.0000 61418.8291  0.01%     -    1s
     0     0 61418.8291    0   13 61428.0000 61418.8291  0.01%     -    1s
     0     0 61419.1561    0   23 61428.0000 61419.1561  0.01%     -    1s
H    0     0                    61427.000000 61419.1561  0.01%     -    1s
     0     0 61419.3900    0   32 61427.0000 61419.3900  0.01%     -    1s
     0     1 61419.3932    0   31 61427.0000 61419.3932  0.01%     -    1s
H    4     2                    61426.000000 61419.3932  0.01%   2.0    2s

Cutting planes:
  Gomory: 10
  Implied bound: 1
  MIR: 21
  Zero half: 4

Explored 6 nodes (15456 simplex iterations) in 2.02 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.142600000000e+04, best bound 6.142100000000e+04, gap 0.0081%