Gurobi 5.0.1 (linux64) logging started Fri Nov 16 08:18:32 2012 Optimize a model with 11904 rows, 4160 columns and 39616 nonzeros Presolve time: 0.10s Presolved: 11904 rows, 4160 columns, 39850 nonzeros Variable types: 0 continuous, 4160 integer (4160 binary) Found heuristic solution: objective 36.0000000 Root relaxation: objective 2.000000e+00, 4056 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 0 128 36.00000 2.00000 94.4% - 1s H 0 0 13.0000000 2.00000 84.6% - 1s H 0 0 5.0000000 2.00000 60.0% - 1s 0 0 2.00000 0 128 5.00000 2.00000 60.0% - 2s 0 0 2.00000 0 128 5.00000 2.00000 60.0% - 6s 0 0 2.00000 0 128 5.00000 2.00000 60.0% - 12s 0 0 2.00000 0 128 5.00000 2.00000 60.0% - 18s 0 0 2.00000 0 128 5.00000 2.00000 60.0% - 23s 0 0 2.00000 0 128 5.00000 2.00000 60.0% - 28s H 0 0 4.0000000 2.00000 50.0% - 41s 0 2 2.00000 0 128 4.00000 2.00000 50.0% - 52s 1 3 2.50000 1 276 4.00000 2.00000 50.0% 25297 58s 2 4 2.50000 1 432 4.00000 2.50000 37.5% 18048 62s 5 7 2.66667 3 277 4.00000 2.50000 37.5% 9207 66s 33 15 2.50000 2 125 4.00000 2.50000 37.5% 1905 70s 92 24 cutoff 7 4.00000 2.66667 33.3% 983 75s 201 11 cutoff 9 4.00000 3.00000 25.0% 617 80s Cutting planes: Clique: 98 Explored 271 nodes (214234 simplex iterations) in 81.36 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%