Gurobi 5.0.1 (linux64) logging started Fri Nov 16 05:15:20 2012 Optimize a model with 7235 rows, 2970 columns and 24406 nonzeros Presolve removed 1461 rows and 56 columns Presolve time: 0.20s Presolved: 5774 rows, 2914 columns, 20736 nonzeros Variable types: 0 continuous, 2914 integer (2914 binary) Found heuristic solution: objective 54.0000000 Root relaxation: objective 3.000000e+00, 5224 iterations, 0.73 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 1232 54.00000 3.00000 94.4% - 2s H 0 0 49.0000000 3.00000 93.9% - 2s H 0 0 5.0000000 3.00000 40.0% - 2s 0 0 3.00000 0 1081 5.00000 3.00000 40.0% - 3s H 0 0 4.0000000 3.00000 25.0% - 3s 0 0 3.00000 0 1419 4.00000 3.00000 25.0% - 4s 0 0 3.00000 0 66 4.00000 3.00000 25.0% - 8s 0 0 3.00000 0 104 4.00000 3.00000 25.0% - 10s 0 0 3.00000 0 104 4.00000 3.00000 25.0% - 12s 0 0 3.00000 0 96 4.00000 3.00000 25.0% - 15s 0 0 3.00000 0 100 4.00000 3.00000 25.0% - 18s 0 0 3.00000 0 87 4.00000 3.00000 25.0% - 19s 0 0 3.00000 0 108 4.00000 3.00000 25.0% - 22s 0 0 3.00000 0 108 4.00000 3.00000 25.0% - 22s 0 2 3.00000 0 107 4.00000 3.00000 25.0% - 24s 2 3 3.00000 1 108 4.00000 3.00000 25.0% 1078 25s 5 5 3.00000 1 94 4.00000 3.00000 25.0% 431 33s 6 6 3.00000 1 100 4.00000 3.00000 25.0% 359 36s 8 7 3.00000 1 142 4.00000 3.00000 25.0% 269 43s 9 8 3.00000 1 104 4.00000 3.00000 25.0% 239 45s 10 8 3.00000 1 128 4.00000 3.00000 25.0% 216 51s 13 12 3.00000 12 90 4.00000 3.00000 25.0% 8789 57s 15 14 3.00000 13 90 4.00000 3.00000 25.0% 7765 62s Cutting planes: Gomory: 3 Clique: 1 Zero half: 10 Explored 23 nodes (225625 simplex iterations) in 64.72 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%