Gurobi 5.0.1 (linux64) logging started Fri Nov 16 07:55:16 2012 Optimize a model with 12348 rows, 4032 columns and 40824 nonzeros Presolve time: 0.10s Presolved: 12348 rows, 4032 columns, 41029 nonzeros Variable types: 0 continuous, 4032 integer (4032 binary) Found heuristic solution: objective 35.0000000 Root relaxation: objective 2.000000e+00, 9301 iterations, 2.10 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 126 35.00000 2.00000 94.3% - 2s H 0 0 13.0000000 2.00000 84.6% - 2s H 0 0 5.0000000 2.00000 60.0% - 3s 0 0 2.00000 0 126 5.00000 2.00000 60.0% - 3s 0 0 2.00000 0 126 5.00000 2.00000 60.0% - 4s 0 0 2.00000 0 126 5.00000 2.00000 60.0% - 5s 0 0 2.00000 0 126 5.00000 2.00000 60.0% - 5s 0 0 2.00000 0 126 5.00000 2.00000 60.0% - 6s 0 0 2.00000 0 126 5.00000 2.00000 60.0% - 6s H 0 0 4.0000000 2.00000 50.0% - 7s 0 2 2.00000 0 126 4.00000 2.00000 50.0% - 7s 1 3 3.00000 1 810 4.00000 2.00000 50.0% 12682 13s 2 4 3.00000 1 762 4.00000 3.00000 25.0% 11398 17s 11 5 cutoff 5 4.00000 3.00000 25.0% 2993 20s 33 3 cutoff 5 4.00000 3.00000 25.0% 1862 28s 35 3 3.00000 3 120 4.00000 3.00000 25.0% 1982 30s 40 2 3.00000 3 120 4.00000 3.00000 25.0% 2092 37s 42 0 cutoff 4 4.00000 4.00000 0.0% 2261 40s Cutting planes: Clique: 41 Zero half: 14 Explored 43 nodes (109558 simplex iterations) in 40.29 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%