Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:51:11 2012 Optimize a model with 5640 rows, 2256 columns and 18988 nonzeros Presolve removed 1175 rows and 0 columns Presolve time: 0.11s Presolved: 4465 rows, 2256 columns, 16262 nonzeros Variable types: 0 continuous, 2256 integer (2256 binary) Found heuristic solution: objective 26.0000000 Root relaxation: objective 3.000000e+00, 4321 iterations, 0.40 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 102 26.00000 3.00000 88.5% - 0s H 0 0 4.0000000 3.00000 25.0% - 0s 0 0 3.00000 0 102 4.00000 3.00000 25.0% - 1s 0 0 3.00000 0 58 4.00000 3.00000 25.0% - 2s 0 0 3.00000 0 86 4.00000 3.00000 25.0% - 4s 0 0 3.00000 0 56 4.00000 3.00000 25.0% - 5s 0 0 3.00000 0 88 4.00000 3.00000 25.0% - 6s 0 0 3.00000 0 110 4.00000 3.00000 25.0% - 7s 0 0 3.00000 0 94 4.00000 3.00000 25.0% - 9s 0 0 3.00000 0 66 4.00000 3.00000 25.0% - 10s 0 0 3.00000 0 64 4.00000 3.00000 25.0% - 12s 0 0 3.00000 0 74 4.00000 3.00000 25.0% - 13s 0 0 3.00000 0 72 4.00000 3.00000 25.0% - 14s 0 2 3.00000 0 72 4.00000 3.00000 25.0% - 15s 6 6 3.00000 1 106 4.00000 3.00000 25.0% 344 21s 9 8 3.00000 1 146 4.00000 3.00000 25.0% 230 27s 11 9 3.00000 1 133 4.00000 3.00000 25.0% 188 34s Cutting planes: Gomory: 3 Clique: 1 Zero half: 1 Explored 11 nodes (202754 simplex iterations) in 34.69 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%