Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:14:31 2012

Optimize a model with 3236 rows, 1560 columns and 11074 nonzeros
Presolve removed 822 rows and 41 columns
Presolve time: 0.11s
Presolved: 2414 rows, 1519 columns, 9156 nonzeros
Variable types: 0 continuous, 1519 integer (1519 binary)
Found heuristic solution: objective 39.0000000

Root relaxation: objective 3.000000e+00, 2411 iterations, 0.18 seconds

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

     0     0    3.00000    0   83   39.00000    3.00000  92.3%     -    0s
H    0     0                      29.0000000    3.00000  89.7%     -    0s
H    0     0                       4.0000000    3.00000  25.0%     -    0s
     0     0    3.00000    0  120    4.00000    3.00000  25.0%     -    0s
     0     0    3.00000    0   42    4.00000    3.00000  25.0%     -    1s
     0     0 infeasible    0         4.00000    3.00001  25.0%     -    1s

Cutting planes:
  Gomory: 3
  Zero half: 5

Explored 0 nodes (14832 simplex iterations) in 1.59 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.000000000000e+00, best bound 4.000000000000e+00, gap 0.0%