Gurobi 5.0.1 (linux64) logging started Mon Feb  4 19:00:43 2013

Optimize a model with 45825 rows, 4225 columns and 139425 nonzeros
Presolve removed 3107 rows and 2129 columns
Presolve time: 0.34s
Presolved: 42718 rows, 2096 columns, 130137 nonzeros
Variable types: 32 continuous, 2064 integer (2064 binary)
Found heuristic solution: objective 98377.000000

Root relaxation: objective 6.725612e+04, 12865 iterations, 0.90 seconds

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

     0     0 67256.1250    0   13 98377.0000 67256.1250  31.6%     -    1s
H    0     0                    67278.000000 67256.1250  0.03%     -    1s
H    0     0                    67270.000000 67256.1250  0.02%     -    1s
     0     0 67256.1250    0   23 67270.0000 67256.1250  0.02%     -    1s
     0     0 67256.1250    0   10 67270.0000 67256.1250  0.02%     -    2s
H    0     0                    67267.000000 67256.1250  0.02%     -    2s
     0     0 67256.1250    0   35 67267.0000 67256.1250  0.02%     -    2s
     0     2 67256.1250    0   30 67267.0000 67256.1250  0.02%     -    2s
H    3     3                    67264.000000 67256.1250  0.01%  28.3    2s
H    3     3                    67263.000000 67256.1250  0.01%  28.3    2s

Cutting planes:
  Gomory: 10
  Cover: 1
  Implied bound: 8
  Clique: 4
  MIR: 23
  Zero half: 9

Explored 5 nodes (18335 simplex iterations) in 2.64 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.726300000000e+04, best bound 6.725700000000e+04, gap 0.0089%