Gurobi 5.0.1 (linux64) logging started Fri Nov 16 05:00:38 2012 Optimize a model with 7154 rows, 2862 columns and 24060 nonzeros Presolve removed 1433 rows and 2 columns Presolve time: 0.18s Presolved: 5774 rows, 2860 columns, 23208 nonzeros Variable types: 0 continuous, 2860 integer (2860 binary) Found heuristic solution: objective 53.0000000 Root relaxation: objective 3.000000e+00, 4468 iterations, 0.51 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 70 53.00000 3.00000 94.3% - 2s H 0 0 4.0000000 3.00000 25.0% - 2s 0 0 3.00000 0 116 4.00000 3.00000 25.0% - 3s 0 0 3.00000 0 102 4.00000 3.00000 25.0% - 4s 0 0 3.00000 0 102 4.00000 3.00000 25.0% - 7s 0 0 3.00000 0 112 4.00000 3.00000 25.0% - 9s 0 0 3.00000 0 130 4.00000 3.00000 25.0% - 11s 0 0 3.00000 0 113 4.00000 3.00000 25.0% - 13s 0 2 3.00000 0 99 4.00000 3.00000 25.0% - 17s 4 4 3.00000 1 125 4.00000 3.00000 25.0% 902 22s 5 5 3.00000 1 109 4.00000 3.00000 25.0% 721 26s 7 6 3.00000 1 93 4.00000 3.00000 25.0% 515 33s 8 7 3.00000 1 115 4.00000 3.00000 25.0% 451 37s 9 8 3.00000 1 188 4.00000 3.00000 25.0% 401 45s 12 12 3.00000 15 113 4.00000 3.00000 25.0% 8768 56s 13 12 3.00000 15 1491 4.00000 3.00000 25.0% 8267 96s 22 12 3.00000 19 944 4.00000 3.00000 25.0% 5075 105s 49 4 3.00000 18 78 4.00000 3.00000 25.0% 2628 110s Cutting planes: Gomory: 23 Zero half: 48 Explored 60 nodes (199560 simplex iterations) in 111.02 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%