Gurobi 5.0.1 (linux64) logging started Fri Nov 16 04:12:45 2012 Optimize a model with 5879 rows, 2450 columns and 19843 nonzeros Presolve removed 1227 rows and 2 columns Presolve time: 0.13s Presolved: 4701 rows, 2448 columns, 19114 nonzeros Variable types: 0 continuous, 2448 integer (2448 binary) Found heuristic solution: objective 49.0000000 Root relaxation: objective 3.000000e+00, 3879 iterations, 0.44 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 58 49.00000 3.00000 93.9% - 2s H 0 0 19.0000000 3.00000 84.2% - 2s H 0 0 4.0000000 3.00000 25.0% - 2s 0 0 3.00000 0 154 4.00000 3.00000 25.0% - 2s 0 0 3.00000 0 87 4.00000 3.00000 25.0% - 4s 0 0 3.00000 0 116 4.00000 3.00000 25.0% - 5s 0 0 3.00000 0 155 4.00000 3.00000 25.0% - 6s 0 0 3.00000 0 148 4.00000 3.00000 25.0% - 8s 0 0 3.00000 0 94 4.00000 3.00000 25.0% - 11s 0 0 3.00000 0 90 4.00000 3.00000 25.0% - 12s 0 0 3.00000 0 80 4.00000 3.00000 25.0% - 13s 0 0 3.00000 0 399 4.00000 3.00000 25.0% - 14s 0 0 3.00000 0 230 4.00000 3.00000 25.0% - 16s 0 0 3.00000 0 110 4.00000 3.00000 25.0% - 18s 0 0 3.00000 0 603 4.00000 3.00000 25.0% - 20s 0 0 3.00000 0 603 4.00000 3.00000 25.0% - 21s 0 2 3.00000 0 603 4.00000 3.00000 25.0% - 24s 2 3 3.00000 1 603 4.00000 3.00000 25.0% 3228 25s 5 5 3.00000 1 94 4.00000 3.00000 25.0% 1291 30s 8 7 3.00000 1 95 4.00000 3.00000 25.0% 807 35s Cutting planes: Gomory: 20 Zero half: 62 Explored 8 nodes (177998 simplex iterations) in 36.33 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%