Gurobi 5.0.1 (linux64) logging started Mon Feb  4 19:04:38 2013

Optimize a model with 59711 rows, 5041 columns and 181476 nonzeros
Presolve removed 4328 rows and 2550 columns
Presolve time: 0.49s
Presolved: 55383 rows, 2491 columns, 168390 nonzeros
Variable types: 33 continuous, 2458 integer (2458 binary)
Found heuristic solution: objective 106966.00000

Root relaxation: objective 7.666313e+04, 15400 iterations, 1.45 seconds

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

     0     0 76663.1286    0   13 106966.000 76663.1286  28.3%     -    2s
H    0     0                    76675.000000 76663.1286  0.02%     -    2s
H    0     0                    76672.000000 76663.1286  0.01%     -    2s
     0     0 76663.6788    0   22 76672.0000 76663.6788  0.01%     -    2s
     0     0 76663.6788    0   15 76672.0000 76663.6788  0.01%     -    2s
     0     0 76663.8342    0   28 76672.0000 76663.8342  0.01%     -    2s
     0     0 76663.8697    0   34 76672.0000 76663.8697  0.01%     -    2s
     0     0 76663.9740    0   38 76672.0000 76663.9740  0.01%     -    2s
     0     0 76664.1055    0   39 76672.0000 76664.1055  0.01%     -    2s
H    0     0                    76670.000000 76664.1055  0.01%     -    2s

Cutting planes:
  MIR: 11
  Zero half: 4

Explored 0 nodes (17842 simplex iterations) in 2.83 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.667000000000e+04, best bound 7.666500000000e+04, gap 0.0065%