Gurobi 5.0.1 (linux64) logging started Fri Nov 16 07:47:36 2012 Optimize a model with 11097 rows, 3906 columns and 36888 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.30s Presolved: 11095 rows, 3904 columns, 36530 nonzeros Variable types: 0 continuous, 3904 integer (3904 binary) Found heuristic solution: objective 62.0000000 Root relaxation: objective 2.000000e+00, 2785 iterations, 0.08 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 124 62.00000 2.00000 96.8% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 218 5.00000 2.66667 46.7% - 1s 0 0 2.67416 0 3280 5.00000 2.67416 46.5% - 2s 0 0 2.67416 0 3270 5.00000 2.67416 46.5% - 3s 0 0 2.67416 0 3257 5.00000 2.67416 46.5% - 4s 0 0 2.67416 0 3233 5.00000 2.67416 46.5% - 4s 0 0 2.67416 0 3234 5.00000 2.67416 46.5% - 5s 0 0 2.67416 0 3099 5.00000 2.67416 46.5% - 9s 0 0 2.67416 0 3211 5.00000 2.67416 46.5% - 13s 0 0 2.67416 0 3125 5.00000 2.67416 46.5% - 17s 0 0 2.67416 0 3084 5.00000 2.67416 46.5% - 23s 0 0 2.67416 0 2899 5.00000 2.67416 46.5% - 26s 0 0 2.67416 0 2986 5.00000 2.67416 46.5% - 30s 0 0 2.67416 0 3039 5.00000 2.67416 46.5% - 34s 0 0 2.67416 0 3085 5.00000 2.67416 46.5% - 37s 0 0 2.67416 0 3085 5.00000 2.67416 46.5% - 40s 0 2 3.00000 0 3085 5.00000 3.00000 40.0% - 57s * 15 3 8 4.0000000 4.00000 0.0% 1170 58s Cutting planes: Clique: 92 Zero half: 7 Explored 16 nodes (141344 simplex iterations) in 58.74 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%