Gurobi 5.0.1 (linux64) logging started Sat Nov 17 08:38:01 2012

Optimize a model with 72479 rows, 57840 columns and 274078 nonzeros
Presolve removed 15 rows and 3600 columns (presolve time = 5s) ...
Presolve removed 17 rows and 3602 columns
Presolve time: 5.61s
Presolved: 72462 rows, 54238 columns, 269874 nonzeros
Variable types: 0 continuous, 54238 integer (54238 binary)
Found heuristic solution: objective 240.0000000

Root relaxation: objective 2.000000e+00, 39721 iterations, 3.96 seconds
Total elapsed time = 15.20s

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

     0     0    2.00000    0  450  240.00000    2.00000  99.2%     -   17s
H    0     0                     239.0000000    2.00000  99.2%     -   17s
H    0     0                       4.0000000    2.00000  50.0%     -   17s
     0     0    2.20000    0 14409    4.00000    2.20000  45.0%     -   74s
     0     0    2.40000    0 5965    4.00000    2.40000  40.0%     -  193s
H    0     0                       3.0000000    2.40000  20.0%     -  195s

Cutting planes:
  Zero half: 16

Explored 0 nodes (230535 simplex iterations) in 195.29 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%