Gurobi 5.0.1 (linux64) logging started Fri Nov 16 04:12:43 2012

Optimize a model with 6124 rows, 2450 columns and 20578 nonzeros
Presolve removed 1521 rows and 2 columns
Presolve time: 0.14s
Presolved: 4652 rows, 2448 columns, 19312 nonzeros
Variable types: 0 continuous, 2448 integer (2448 binary)
Found heuristic solution: objective 49.0000000

Root relaxation: objective 3.000000e+00, 3958 iterations, 0.43 seconds

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

     0     0    3.00000    0  179   49.00000    3.00000  93.9%     -    1s
H    0     0                      26.0000000    3.00000  88.5%     -    1s
H    0     0                      20.0000000    3.00000  85.0%     -    1s
H    0     0                       5.0000000    3.00000  40.0%     -    1s
     0     0    3.00000    0  668    5.00000    3.00000  40.0%     -    1s
H    0     0                       4.0000000    3.00000  25.0%     -    2s
     0     0 infeasible    0         4.00000    3.00001  25.0%     -    2s

Cutting planes:
  Gomory: 8
  Zero half: 49

Explored 0 nodes (12383 simplex iterations) in 2.40 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%