Gurobi 5.0.1 (linux64) logging started Fri Nov 16 21:39:39 2012 Optimize a model with 27631 rows, 31152 columns and 113166 nonzeros Presolve removed 36 rows and 5986 columns Presolve time: 0.66s Presolved: 27595 rows, 25166 columns, 106868 nonzeros Variable types: 0 continuous, 25166 integer (25166 binary) Found heuristic solution: objective 176.0000000 Root relaxation: objective 2.000000e+00, 17312 iterations, 1.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 246 176.00000 2.00000 98.9% - 3s H 0 0 137.0000000 2.00000 98.5% - 3s H 0 0 4.0000000 2.00000 50.0% - 3s 0 0 2.14286 0 1065 4.00000 2.14286 46.4% - 14s H 0 0 3.0000000 2.14286 28.6% - 14s Cutting planes: Gomory: 1 Zero half: 10 Explored 0 nodes (77954 simplex iterations) in 14.58 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%