Gurobi 5.0.1 (linux64) logging started Fri Nov 16 12:35:43 2012 Optimize a model with 18071 rows, 5256 columns and 59110 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.65s Presolved: 18069 rows, 5254 columns, 58608 nonzeros Variable types: 0 continuous, 5254 integer (5254 binary) Found heuristic solution: objective 71.0000000 Root relaxation: objective 2.000000e+00, 4063 iterations, 0.17 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 144 71.00000 2.00000 97.2% - 1s H 0 0 65.0000000 2.00000 96.9% - 1s H 0 0 5.0000000 2.00000 60.0% - 1s 0 0 2.66667 0 3224 5.00000 2.66667 46.7% - 8s 0 0 2.66667 0 3225 5.00000 2.66667 46.7% - 9s 0 0 2.66667 0 202 5.00000 2.66667 46.7% - 13s 0 0 2.66986 0 4095 5.00000 2.66986 46.6% - 14s 0 0 2.66986 0 4081 5.00000 2.66986 46.6% - 16s 0 0 2.66986 0 4101 5.00000 2.66986 46.6% - 16s 0 0 2.66986 0 4096 5.00000 2.66986 46.6% - 18s 0 0 2.66986 0 4090 5.00000 2.66986 46.6% - 19s 0 0 2.66986 0 4075 5.00000 2.66986 46.6% - 21s 0 0 2.66986 0 4078 5.00000 2.66986 46.6% - 23s 0 0 2.66986 0 4075 5.00000 2.66986 46.6% - 24s 0 0 2.66986 0 4056 5.00000 2.66986 46.6% - 26s 0 0 2.66986 0 4108 5.00000 2.66986 46.6% - 27s 0 0 2.66986 0 4108 5.00000 2.66986 46.6% - 28s 0 0 2.66986 0 4110 5.00000 2.66986 46.6% - 30s 0 0 2.66986 0 4110 5.00000 2.66986 46.6% - 31s 0 2 2.80000 0 4110 5.00000 2.80000 44.0% - 61s * 27 5 21 4.0000000 3.00000 25.0% 333 63s Cutting planes: Clique: 138 Zero half: 5 Explored 32 nodes (78277 simplex iterations) in 63.09 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%