Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:43:39 2012 Optimize a model with 4922 rows, 2162 columns and 16744 nonzeros Presolve removed 1013 rows and 46 columns Presolve time: 0.11s Presolved: 3909 rows, 2116 columns, 14352 nonzeros Variable types: 0 continuous, 2116 integer (2116 binary) Found heuristic solution: objective 26.0000000 Root relaxation: objective 3.000000e+00, 3560 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 74 26.00000 3.00000 88.5% - 0s H 0 0 4.0000000 3.00000 25.0% - 0s 0 0 3.00000 0 138 4.00000 3.00000 25.0% - 1s 0 0 3.00000 0 126 4.00000 3.00000 25.0% - 2s 0 0 3.00000 0 121 4.00000 3.00000 25.0% - 3s 0 0 3.00000 0 137 4.00000 3.00000 25.0% - 4s 0 0 3.00000 0 119 4.00000 3.00000 25.0% - 6s 0 0 3.00000 0 76 4.00000 3.00000 25.0% - 7s 0 0 3.00000 0 111 4.00000 3.00000 25.0% - 8s 0 0 3.00000 0 139 4.00000 3.00000 25.0% - 9s 0 0 3.00000 0 139 4.00000 3.00000 25.0% - 10s 0 2 3.00000 0 139 4.00000 3.00000 25.0% - 12s 6 6 3.00000 1 123 4.00000 3.00000 25.0% 809 16s 9 8 3.00000 1 125 4.00000 3.00000 25.0% 539 22s 15 10 3.00000 15 78 4.00000 3.00000 25.0% 4555 25s Cutting planes: Gomory: 2 Zero half: 6 Explored 30 nodes (151401 simplex iterations) in 29.60 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%