Gurobi 5.0.1 (linux64) logging started Fri Nov 16 15:25:33 2012 Optimize a model with 8431 rows, 4692 columns and 29646 nonzeros Presolve removed 818 rows and 2 columns Presolve time: 0.30s Presolved: 7681 rows, 4690 columns, 32074 nonzeros Variable types: 0 continuous, 4690 integer (4690 binary) Found heuristic solution: objective 68.0000000 Root relaxation: objective 3.000000e+00, 5367 iterations, 0.54 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 56 68.00000 3.00000 95.6% - 2s H 0 0 59.0000000 3.00000 94.9% - 2s H 0 0 5.0000000 3.00000 40.0% - 2s 0 0 3.00000 0 56 5.00000 3.00000 40.0% - 2s H 0 0 4.0000000 3.00000 25.0% - 2s H 0 0 3.0000000 3.00000 0.0% - 2s Cutting planes: Gomory: 1 Zero half: 2 Explored 0 nodes (19014 simplex iterations) in 2.72 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%