Gurobi 5.0.1 (linux64) logging started Fri Nov 16 05:12:06 2012 Optimize a model with 7181 rows, 2970 columns and 24244 nonzeros Presolve removed 1190 rows and 2 columns Presolve time: 0.21s Presolved: 5991 rows, 2968 columns, 21322 nonzeros Variable types: 0 continuous, 2968 integer (2968 binary) Found heuristic solution: objective 54.0000000 Root relaxation: objective 3.000000e+00, 5192 iterations, 0.68 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 144 54.00000 3.00000 94.4% - 3s H 0 0 48.0000000 3.00000 93.8% - 3s H 0 0 42.0000000 3.00000 92.9% - 3s H 0 0 5.0000000 3.00000 40.0% - 3s 0 0 3.00000 0 145 5.00000 3.00000 40.0% - 4s 0 0 3.00000 0 88 5.00000 3.00000 40.0% - 6s H 0 0 4.0000000 3.00000 25.0% - 7s 0 0 3.00000 0 92 4.00000 3.00000 25.0% - 8s 0 0 3.00000 0 96 4.00000 3.00000 25.0% - 10s 0 0 3.00000 0 108 4.00000 3.00000 25.0% - 13s 0 0 3.00000 0 106 4.00000 3.00000 25.0% - 14s 0 2 3.00000 0 105 4.00000 3.00000 25.0% - 15s 4 4 3.00000 1 114 4.00000 3.00000 25.0% 554 20s 6 6 3.00000 1 122 4.00000 3.00000 25.0% 370 27s 7 6 3.00000 1 102 4.00000 3.00000 25.0% 317 30s 9 8 3.00000 1 121 4.00000 3.00000 25.0% 246 39s 10 8 3.00000 1 116 4.00000 3.00000 25.0% 222 41s 12 12 3.00000 11 94 4.00000 3.00000 25.0% 9411 46s 14 12 3.00000 12 92 4.00000 3.00000 25.0% 8340 53s 15 13 3.00000 12 86 4.00000 3.00000 25.0% 7954 57s 16 13 3.00000 13 1462 4.00000 3.00000 25.0% 7518 114s 18 11 infeasible 14 4.00000 3.00000 25.0% 6725 115s Cutting planes: Gomory: 22 Zero half: 52 Explored 23 nodes (198774 simplex iterations) in 116.94 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%