Gurobi 5.0.1 (linux64) logging started Fri Nov 16 21:27:31 2012 Optimize a model with 28379 rows, 29756 columns and 114034 nonzeros Presolve removed 25 rows and 3958 columns Presolve time: 0.59s Presolved: 28354 rows, 25798 columns, 109748 nonzeros Variable types: 0 continuous, 25798 integer (25798 binary) Found heuristic solution: objective 172.0000000 Root relaxation: objective 2.000000e+00, 17430 iterations, 1.04 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 252 172.00000 2.00000 98.8% - 3s H 0 0 161.0000000 2.00000 98.8% - 3s H 0 0 4.0000000 2.00000 50.0% - 3s 0 0 2.20000 0 1025 4.00000 2.20000 45.0% - 10s H 0 0 3.0000000 2.20000 26.7% - 11s Cutting planes: Gomory: 1 Zero half: 9 Explored 0 nodes (71620 simplex iterations) in 11.24 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%