Gurobi 5.0.1 (linux64) logging started Fri Nov 16 04:00:41 2012 Optimize a model with 4991 rows, 2352 columns and 17086 nonzeros Presolve removed 531 rows and 50 columns Presolve time: 0.12s Presolved: 4460 rows, 2302 columns, 15604 nonzeros Variable types: 0 continuous, 2302 integer (2302 binary) Found heuristic solution: objective 48.0000000 Root relaxation: objective 3.000000e+00, 3322 iterations, 0.27 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 59 48.00000 3.00000 93.8% - 1s H 0 0 10.0000000 3.00000 70.0% - 1s H 0 0 4.0000000 3.00000 25.0% - 1s 0 0 3.00000 0 140 4.00000 3.00000 25.0% - 1s 0 0 3.00000 0 68 4.00000 3.00000 25.0% - 2s 0 0 3.00000 0 69 4.00000 3.00000 25.0% - 3s 0 0 3.00000 0 78 4.00000 3.00000 25.0% - 5s 0 0 3.00000 0 73 4.00000 3.00000 25.0% - 6s 0 0 3.00000 0 72 4.00000 3.00000 25.0% - 7s 0 0 3.00000 0 85 4.00000 3.00000 25.0% - 8s 0 0 3.00000 0 84 4.00000 3.00000 25.0% - 8s 0 2 3.00000 0 84 4.00000 3.00000 25.0% - 9s 2 3 3.00000 1 84 4.00000 3.00000 25.0% 769 10s 5 5 3.00000 1 79 4.00000 3.00000 25.0% 308 15s 8 7 3.00000 1 85 4.00000 3.00000 25.0% 192 21s 12 12 3.00000 10 44 4.00000 3.00000 25.0% 5008 25s 13 12 3.00000 11 1045 4.00000 3.00000 25.0% 4802 49s 14 13 3.00000 11 101 4.00000 3.00000 25.0% 4553 50s Cutting planes: Gomory: 1 Zero half: 5 Explored 29 nodes (129395 simplex iterations) in 50.79 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%