Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:39:36 2012 Optimize a model with 4814 rows, 2070 columns and 16288 nonzeros Presolve removed 812 rows and 2 columns Presolve time: 0.11s Presolved: 4002 rows, 2068 columns, 14130 nonzeros Variable types: 0 continuous, 2068 integer (2068 binary) Found heuristic solution: objective 45.0000000 Root relaxation: objective 3.000000e+00, 3209 iterations, 0.28 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 101 45.00000 3.00000 93.3% - 1s H 0 0 33.0000000 3.00000 90.9% - 1s H 0 0 5.0000000 3.00000 40.0% - 1s 0 0 3.00000 0 209 5.00000 3.00000 40.0% - 1s H 0 0 4.0000000 3.00000 25.0% - 1s 0 0 3.00000 0 102 4.00000 3.00000 25.0% - 3s 0 0 3.00000 0 85 4.00000 3.00000 25.0% - 4s 0 0 3.00000 0 89 4.00000 3.00000 25.0% - 5s 0 0 3.00000 0 88 4.00000 3.00000 25.0% - 6s 0 0 3.00000 0 94 4.00000 3.00000 25.0% - 7s 0 0 3.00000 0 94 4.00000 3.00000 25.0% - 8s 0 2 3.00000 0 94 4.00000 3.00000 25.0% - 11s 5 5 3.00000 1 157 4.00000 3.00000 25.0% 1938 16s 7 6 3.00000 1 70 4.00000 3.00000 25.0% 1384 20s 11 9 3.00000 1 99 4.00000 3.00000 25.0% 881 28s 14 13 3.00000 12 70 4.00000 3.00000 25.0% 6432 32s 16 14 3.00000 13 72 4.00000 3.00000 25.0% 5696 35s 27 10 infeasible 16 4.00000 3.00000 25.0% 3562 40s Cutting planes: Gomory: 10 Clique: 2 Zero half: 38 Explored 40 nodes (167621 simplex iterations) in 42.10 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%