Gurobi 5.0.1 (linux64) logging started Mon Feb  4 19:02:11 2013

Optimize a model with 52462 rows, 4624 columns and 159528 nonzeros
Presolve removed 6098 rows and 2379 columns
Presolve time: 0.42s
Presolved: 46364 rows, 2245 columns, 140974 nonzeros
Variable types: 29 continuous, 2216 integer (2216 binary)
Found heuristic solution: objective 96169.000000

Root relaxation: objective 7.402165e+04, 15873 iterations, 1.31 seconds

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

     0     0 74021.6507    0   11 96169.0000 74021.6507  23.0%     -    1s
H    0     0                    74033.000000 74021.6507  0.02%     -    1s
H    0     0                    74032.000000 74021.6507  0.01%     -    1s
     0     0 74021.8947    0   30 74032.0000 74021.8947  0.01%     -    2s
H    0     0                    74030.000000 74021.8947  0.01%     -    2s
     0     0 74021.8947    0   14 74030.0000 74021.8947  0.01%     -    2s
H    0     0                    74028.000000 74021.8947  0.01%     -    2s

Explored 0 nodes (18445 simplex iterations) in 2.66 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.402800000000e+04, best bound 7.402200000000e+04, gap 0.0081%