Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:22:03 2012

Optimize a model with 4073 rows, 1806 columns and 13816 nonzeros
Presolve removed 674 rows and 2 columns
Presolve time: 0.11s
Presolved: 3399 rows, 1804 columns, 12100 nonzeros
Variable types: 0 continuous, 1804 integer (1804 binary)
Found heuristic solution: objective 42.0000000

Root relaxation: objective 3.000000e+00, 2693 iterations, 0.16 seconds

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

     0     0    3.00000    0  285   42.00000    3.00000  92.9%     -    0s
H    0     0                      16.0000000    3.00000  81.2%     -    0s
H    0     0                       9.0000000    3.00000  66.7%     -    0s
     0     0    3.00000    0  264    9.00000    3.00000  66.7%     -    1s
H    0     0                       4.0000000    3.00000  25.0%     -    1s
     0     0    3.00000    0 1245    4.00000    3.00000  25.0%     -    1s
     0     0 infeasible    0         4.00000    3.00001  25.0%     -    1s

Cutting planes:
  Gomory: 1
  Zero half: 33

Explored 0 nodes (8415 simplex iterations) in 1.49 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%