Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:29:35 2012 Optimize a model with 4299 rows, 1892 columns and 14575 nonzeros Presolve removed 1077 rows and 2 columns Presolve time: 0.11s Presolved: 3265 rows, 1890 columns, 13694 nonzeros Variable types: 0 continuous, 1890 integer (1890 binary) Found heuristic solution: objective 43.0000000 Root relaxation: objective 3.000000e+00, 3136 iterations, 0.30 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 480 43.00000 3.00000 93.0% - 1s H 0 0 42.0000000 3.00000 92.9% - 1s H 0 0 20.0000000 3.00000 85.0% - 1s H 0 0 18.0000000 3.00000 83.3% - 1s 0 0 3.00000 0 80 18.00000 3.00000 83.3% - 1s H 0 0 17.0000000 3.00000 82.4% - 1s H 0 0 4.0000000 3.00000 25.0% - 1s 0 0 3.00000 0 67 4.00000 3.00000 25.0% - 1s 0 0 3.00000 0 80 4.00000 3.00000 25.0% - 1s 0 0 3.00000 0 66 4.00000 3.00000 25.0% - 2s 0 0 3.00000 0 53 4.00000 3.00000 25.0% - 3s 0 0 3.00000 0 96 4.00000 3.00000 25.0% - 4s 0 0 3.00000 0 85 4.00000 3.00000 25.0% - 5s 0 0 3.00000 0 120 4.00000 3.00000 25.0% - 6s 0 0 3.00000 0 78 4.00000 3.00000 25.0% - 7s 0 0 3.00000 0 76 4.00000 3.00000 25.0% - 8s 0 0 3.00000 0 63 4.00000 3.00000 25.0% - 9s 0 0 3.00000 0 81 4.00000 3.00000 25.0% - 10s 0 0 3.00000 0 63 4.00000 3.00000 25.0% - 10s 0 2 3.00000 0 63 4.00000 3.00000 25.0% - 11s 7 6 3.00000 1 92 4.00000 3.00000 25.0% 286 15s 10 8 3.00000 1 96 4.00000 3.00000 25.0% 200 20s Cutting planes: Gomory: 5 Zero half: 20 Explored 21 nodes (125519 simplex iterations) in 24.28 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%