Gurobi 5.0.1 (linux64) logging started Fri Nov 16 15:10:06 2012

Optimize a model with 644 rows, 812 columns and 2632 nonzeros
Presolve removed 5 rows and 140 columns
Presolve time: 0.01s
Presolved: 639 rows, 672 columns, 2492 nonzeros
Variable types: 0 continuous, 672 integer (672 binary)
Found heuristic solution: objective 11.0000000
Found heuristic solution: objective 3.0000000

Root relaxation: objective 2.000000e+00, 478 iterations, 0.01 seconds

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

     0     0    2.00000    0   28    3.00000    2.00000  33.3%     -    0s
     0     0    2.00000    0   54    3.00000    2.00000  33.3%     -    0s
     0     0    2.00000    0   28    3.00000    2.00000  33.3%     -    0s
     0     0    2.00000    0   54    3.00000    2.00000  33.3%     -    0s
     0     0    2.00000    0   54    3.00000    2.00000  33.3%     -    0s
     0     0    2.00000    0   54    3.00000    2.00000  33.3%     -    0s
     0     0    2.00000    0   63    3.00000    2.00000  33.3%     -    0s
     0     0    2.00000    0   63    3.00000    2.00000  33.3%     -    0s
     0     2    2.00000    0   63    3.00000    2.00000  33.3%     -    0s

Cutting planes:
  Gomory: 2
  Zero half: 16

Explored 7 nodes (15179 simplex iterations) in 0.42 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.000000000000e+00, best bound 3.000000000000e+00, gap 0.0%