Gurobi 5.0.1 (linux64) logging started Fri Nov 16 07:49:42 2012 Optimize a model with 12585 rows, 3906 columns and 41352 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.34s Presolved: 12645 rows, 3904 columns, 44790 nonzeros Variable types: 0 continuous, 3904 integer (3904 binary) Found heuristic solution: objective 62.0000000 Root relaxation: objective 2.000000e+00, 2871 iterations, 0.09 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 61.0000000 2.00000 96.7% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 167 5.00000 2.66667 46.7% - 1s 0 0 2.67039 0 3364 5.00000 2.67039 46.6% - 2s 0 0 2.67039 0 3343 5.00000 2.67039 46.6% - 3s 0 0 2.67039 0 3389 5.00000 2.67039 46.6% - 4s 0 0 2.67039 0 2902 5.00000 2.67039 46.6% - 7s 0 0 2.67039 0 3158 5.00000 2.67039 46.6% - 9s 0 0 2.67039 0 2989 5.00000 2.67039 46.6% - 12s 0 0 2.67039 0 3094 5.00000 2.67039 46.6% - 14s 0 0 2.67039 0 3051 5.00000 2.67039 46.6% - 17s 0 0 2.67039 0 2868 5.00000 2.67039 46.6% - 19s 0 0 2.67039 0 2992 5.00000 2.67039 46.6% - 21s 0 0 2.67039 0 3057 5.00000 2.67039 46.6% - 24s 0 0 2.67039 0 2983 5.00000 2.67039 46.6% - 25s 0 2 2.80000 0 2982 5.00000 2.80000 44.0% - 31s H 27 4 4.0000000 3.00000 25.0% 324 33s Cutting planes: Clique: 75 Zero half: 4 Explored 32 nodes (83808 simplex iterations) in 34.69 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%