Gurobi 5.0.1 (linux64) logging started Fri Nov 16 09:33:19 2012

Optimize a model with 14123 rows, 4422 columns and 46462 nonzeros
Presolve removed 2 rows and 2 columns
Presolve time: 0.43s
Presolved: 14121 rows, 4420 columns, 46034 nonzeros
Variable types: 0 continuous, 4420 integer (4420 binary)
Found heuristic solution: objective 66.0000000

Root relaxation: objective 2.000000e+00, 3320 iterations, 0.12 seconds

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

     0     0    2.00000    0  132   66.00000    2.00000  97.0%     -    0s
H    0     0                       5.0000000    2.00000  60.0%     -    0s
     0     0    2.66667    0  507    5.00000    2.66667  46.7%     -    3s
     0     0    2.68817    0 4075    5.00000    2.68817  46.2%     -    4s
H    0     0                       4.0000000    2.68817  32.8%     -    5s
     0     0    2.68817    0 4118    4.00000    2.68817  32.8%     -    6s
     0     0    2.71084    0 3293    4.00000    2.71084  32.2%     -   20s
     0     0    2.71084    0 3375    4.00000    2.71084  32.2%     -   20s
     0     0    2.71084    0 3118    4.00000    2.71084  32.2%     -   32s
     0     0    2.71084    0 3401    4.00000    2.71084  32.2%     -   42s
     0     0    3.00000    0  183    4.00000    3.00000  25.0%     -   48s
     0     0    3.00000    0  180    4.00000    3.00000  25.0%     -   48s
     0     0 infeasible    0         4.00000    3.00001  25.0%     -   48s

Cutting planes:
  Gomory: 1
  Zero half: 116

Explored 0 nodes (122415 simplex iterations) in 48.35 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%