Gurobi 5.0.1 (linux64) logging started Fri Nov 16 08:34:11 2012 Optimize a model with 11967 rows, 4160 columns and 39742 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.35s Presolved: 11965 rows, 4158 columns, 39368 nonzeros Variable types: 0 continuous, 4158 integer (4158 binary) Found heuristic solution: objective 64.0000000 Root relaxation: objective 2.000000e+00, 3223 iterations, 0.12 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 128 64.00000 2.00000 96.9% - 0s H 0 0 61.0000000 2.00000 96.7% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 3016 5.00000 2.66667 46.7% - 2s 0 0 2.66667 0 516 5.00000 2.66667 46.7% - 3s H 0 0 4.0000000 2.66667 33.3% - 5s 0 0 2.66667 0 2996 4.00000 2.66667 33.3% - 5s 0 0 2.66667 0 144 4.00000 2.66667 33.3% - 9s 0 0 2.67027 0 3289 4.00000 2.67027 33.2% - 12s 0 0 2.67027 0 3355 4.00000 2.67027 33.2% - 13s 0 0 2.67027 0 3247 4.00000 2.67027 33.2% - 15s 0 0 2.67027 0 3244 4.00000 2.67027 33.2% - 18s 0 0 2.67027 0 3241 4.00000 2.67027 33.2% - 20s 0 0 2.67027 0 3299 4.00000 2.67027 33.2% - 23s 0 0 2.67027 0 3315 4.00000 2.67027 33.2% - 25s 0 0 2.67027 0 3254 4.00000 2.67027 33.2% - 28s 0 0 2.67027 0 3385 4.00000 2.67027 33.2% - 30s 0 0 2.67027 0 3396 4.00000 2.67027 33.2% - 32s 0 0 2.67027 0 3396 4.00000 2.67027 33.2% - 34s 0 2 2.80000 0 3396 4.00000 2.80000 30.0% - 43s 11 1 cutoff 1 4.00000 3.00000 25.0% 1209 45s Cutting planes: Clique: 64 Zero half: 13 Explored 13 nodes (107310 simplex iterations) in 47.28 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%