Gurobi 5.0.1 (linux64) logging started Sat Nov 17 10:00:22 2012

Optimize a model with 71247 rows, 59780 columns and 272302 nonzeros
Presolve removed 21 rows and 4638 columns
Presolve time: 1.78s
Presolved: 71226 rows, 55142 columns, 267082 nonzeros
Variable types: 0 continuous, 55142 integer (55142 binary)
Found heuristic solution: objective 244.0000000

Root relaxation: objective 2.000000e+00, 39831 iterations, 4.06 seconds
Total elapsed time = 11.18s

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

     0     0    2.00000    0  422  244.00000    2.00000  99.2%     -   13s
H    0     0                     233.0000000    2.00000  99.1%     -   13s
H    0     0                       4.0000000    2.00000  50.0%     -   13s
     0     0    2.27027    0 1722    4.00000    2.27027  43.2%     -   55s
H    0     0                       3.0000000    2.27027  24.3%     -   57s

Cutting planes:
  Gomory: 2
  Zero half: 14

Explored 0 nodes (169085 simplex iterations) in 57.23 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.000000000000e+00, best bound 3.000000000000e+00, gap 0.0%