Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:33:52 2012

Optimize a model with 4619 rows, 1980 columns and 15618 nonzeros
Presolve removed 927 rows and 46 columns
Presolve time: 0.12s
Presolved: 3692 rows, 1934 columns, 13382 nonzeros
Variable types: 0 continuous, 1934 integer (1934 binary)
Found heuristic solution: objective 44.0000000

Root relaxation: objective 3.000000e+00, 3155 iterations, 0.31 seconds

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

     0     0    3.00000    0  294   44.00000    3.00000  93.2%     -    1s
H    0     0                      38.0000000    3.00000  92.1%     -    1s
H    0     0                       6.0000000    3.00000  50.0%     -    1s
     0     0    3.00000    0  270    6.00000    3.00000  50.0%     -    1s
H    0     0                       4.0000000    3.00000  25.0%     -    2s
     0     0 infeasible    0         4.00000    3.00001  25.0%     -    2s

Cutting planes:
  Zero half: 51

Explored 0 nodes (16098 simplex iterations) in 2.24 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%