Gurobi 5.0.1 (linux64) logging started Fri Nov 16 04:03:34 2012 Optimize a model with 5711 rows, 2352 columns and 19246 nonzeros Presolve removed 1346 rows and 2 columns Presolve time: 0.13s Presolved: 4413 rows, 2350 columns, 18200 nonzeros Variable types: 0 continuous, 2350 integer (2350 binary) Found heuristic solution: objective 48.0000000 Root relaxation: objective 3.000000e+00, 4375 iterations, 0.64 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 828 48.00000 3.00000 93.8% - 1s H 0 0 42.0000000 3.00000 92.9% - 1s H 0 0 5.0000000 3.00000 40.0% - 2s 0 0 3.00000 0 191 5.00000 3.00000 40.0% - 2s 0 0 3.00000 0 175 5.00000 3.00000 40.0% - 3s H 0 0 4.0000000 3.00000 25.0% - 3s 0 0 3.00000 0 123 4.00000 3.00000 25.0% - 3s 0 0 3.00000 0 109 4.00000 3.00000 25.0% - 3s 0 0 3.00000 0 120 4.00000 3.00000 25.0% - 4s 0 0 3.00000 0 95 4.00000 3.00000 25.0% - 6s 0 0 3.00000 0 97 4.00000 3.00000 25.0% - 7s 0 0 3.00000 0 108 4.00000 3.00000 25.0% - 9s 0 0 3.00000 0 60 4.00000 3.00000 25.0% - 11s 0 0 3.00000 0 90 4.00000 3.00000 25.0% - 13s 0 0 3.00000 0 110 4.00000 3.00000 25.0% - 15s 0 0 3.00000 0 110 4.00000 3.00000 25.0% - 16s 0 2 3.00000 0 110 4.00000 3.00000 25.0% - 20s 9 8 3.00000 1 89 4.00000 3.00000 25.0% 938 25s Cutting planes: Gomory: 7 Zero half: 10 Explored 19 nodes (138583 simplex iterations) in 28.39 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%