Gurobi 5.0.1 (linux64) logging started Fri Nov 16 08:19:54 2012 Optimize a model with 12864 rows, 4160 columns and 42496 nonzeros Presolve time: 0.10s Presolved: 12864 rows, 4160 columns, 42686 nonzeros Variable types: 0 continuous, 4160 integer (4160 binary) Found heuristic solution: objective 39.0000000 Root relaxation: objective 2.000000e+00, 6978 iterations, 1.16 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 128 39.00000 2.00000 94.9% - 3s H 0 0 11.0000000 2.00000 81.8% - 3s H 0 0 5.0000000 2.00000 60.0% - 3s 0 0 2.00000 0 128 5.00000 2.00000 60.0% - 4s 0 0 2.00000 0 128 5.00000 2.00000 60.0% - 11s 0 0 2.00000 0 128 5.00000 2.00000 60.0% - 16s 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 0 0 2.00000 0 128 5.00000 2.00000 60.0% - 32s 0 2 2.00000 0 128 5.00000 2.00000 60.0% - 46s 1 3 3.00000 1 725 5.00000 2.00000 60.0% 36016 57s 2 4 3.00000 1 688 5.00000 3.00000 40.0% 24867 63s 5 5 3.00000 2 345 5.00000 3.00000 40.0% 10788 65s H 27 9 4.0000000 3.00000 25.0% 2687 69s 31 7 3.00000 3 421 4.00000 3.00000 25.0% 2411 70s 41 5 cutoff 7 4.00000 3.00000 25.0% 2326 76s 51 7 3.00000 5 124 4.00000 3.00000 25.0% 2129 80s 64 6 cutoff 8 4.00000 3.00000 25.0% 2053 85s 79 1 cutoff 6 4.00000 3.00000 25.0% 2006 90s Cutting planes: Clique: 153 Explored 81 nodes (230216 simplex iterations) in 91.79 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%