Gurobi 5.0.1 (linux64) logging started Fri Nov 16 10:12:14 2012 Optimize a model with 15232 rows, 4692 columns and 50116 nonzeros Presolve time: 0.12s Presolved: 15232 rows, 4692 columns, 50283 nonzeros Variable types: 0 continuous, 4692 integer (4692 binary) Found heuristic solution: objective 39.0000000 Root relaxation: objective 2.000000e+00, 4602 iterations, 0.14 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 136 39.00000 2.00000 94.9% - 0s H 0 0 15.0000000 2.00000 86.7% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.00000 0 136 5.00000 2.00000 60.0% - 2s 0 0 2.00000 0 136 5.00000 2.00000 60.0% - 10s 0 0 2.00000 0 136 5.00000 2.00000 60.0% - 17s 0 0 2.00000 0 136 5.00000 2.00000 60.0% - 25s 0 0 2.00000 0 136 5.00000 2.00000 60.0% - 34s 0 0 2.00000 0 136 5.00000 2.00000 60.0% - 39s H 0 0 4.0000000 2.00000 50.0% - 43s 0 2 2.00000 0 136 4.00000 2.00000 50.0% - 55s 1 3 3.00000 1 800 4.00000 2.00000 50.0% 42806 65s 2 4 3.00000 1 680 4.00000 3.00000 25.0% 27910 70s 14 6 cutoff 6 4.00000 3.00000 25.0% 5479 75s 20 4 3.00000 2 611 4.00000 3.00000 25.0% 5027 80s 35 3 cutoff 5 4.00000 3.00000 25.0% 3410 85s 42 2 3.00000 2 865 4.00000 3.00000 25.0% 3427 90s Cutting planes: Clique: 130 Zero half: 3 Explored 59 nodes (271681 simplex iterations) in 93.02 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%