Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:56:41 2013

Optimize a model with 29316 rows, 3136 columns and 89376 nonzeros
Presolve removed 3090 rows and 1605 columns
Presolve time: 0.20s
Presolved: 26226 rows, 1531 columns, 79735 nonzeros
Variable types: 20 continuous, 1511 integer (1511 binary)
Found heuristic solution: objective 76474.000000

Root relaxation: objective 6.068086e+04, 6734 iterations, 0.42 seconds

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

     0     0 60680.8636    0    9 76474.0000 60680.8636  20.7%     -    0s
H    0     0                    60700.000000 60680.8636  0.03%     -    0s
H    0     0                    60699.000000 60680.8636  0.03%     -    0s
H    0     0                    60689.000000 60680.8636  0.01%     -    0s
     0     0 60681.1758    0   20 60689.0000 60681.1758  0.01%     -    0s
     0     0 60681.1758    0    8 60689.0000 60681.1758  0.01%     -    0s
     0     0 60681.7690    0   26 60689.0000 60681.7690  0.01%     -    0s
     0     0 60682.2944    0   23 60689.0000 60682.2944  0.01%     -    0s
     0     2 60682.4367    0   23 60689.0000 60682.4367  0.01%     -    0s

Cutting planes:
  Gomory: 4
  Cover: 1
  MIR: 5
  Zero half: 1

Explored 16 nodes (7442 simplex iterations) in 1.04 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.068900000000e+04, best bound 6.068400000000e+04, gap 0.0082%