Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:54:31 2013

Optimize a model with 19649 rows, 2401 columns and 60025 nonzeros
Presolve removed 2565 rows and 1235 columns
Presolve time: 0.15s
Presolved: 17084 rows, 1166 columns, 52218 nonzeros
Variable types: 21 continuous, 1145 integer (1145 binary)
Found heuristic solution: objective 52355.000000

Root relaxation: objective 3.818338e+04, 5834 iterations, 0.30 seconds

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

     0     0 38183.3810    0   14 52355.0000 38183.3810  27.1%     -    0s
H    0     0                    38204.000000 38183.3810  0.05%     -    0s
H    0     0                    38193.000000 38183.3810  0.03%     -    0s
     0     0 38184.9082    0   32 38193.0000 38184.9082  0.02%     -    0s
     0     0 38184.9082    0   11 38193.0000 38184.9082  0.02%     -    0s
     0     0 38185.4780    0   34 38193.0000 38185.4780  0.02%     -    0s
     0     1 38185.5670    0   34 38193.0000 38185.5670  0.02%     -    0s
H   64    36                    38192.000000 38188.4871  0.01%  23.8    0s

Cutting planes:
  Gomory: 6
  MIR: 24
  Zero half: 6

Explored 64 nodes (7805 simplex iterations) in 0.94 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.819200000000e+04, best bound 3.818900000000e+04, gap 0.0079%