Gurobi 5.0.1 (linux64) logging started Fri Nov 16 08:07:19 2012 Optimize a model with 12410 rows, 4032 columns and 40948 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.35s Presolved: 12408 rows, 4030 columns, 40554 nonzeros Variable types: 0 continuous, 4030 integer (4030 binary) Found heuristic solution: objective 63.0000000 Root relaxation: objective 2.000000e+00, 2969 iterations, 0.08 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 126 63.00000 2.00000 96.8% - 0s H 0 0 56.0000000 2.00000 96.4% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 732 5.00000 2.66667 46.7% - 2s 0 0 2.66667 0 2781 5.00000 2.66667 46.7% - 2s 0 0 2.66667 0 153 5.00000 2.66667 46.7% - 6s 0 0 2.67033 0 2986 5.00000 2.67033 46.6% - 9s 0 0 2.67033 0 3063 5.00000 2.67033 46.6% - 10s 0 0 2.67033 0 2996 5.00000 2.67033 46.6% - 12s 0 0 2.67033 0 2980 5.00000 2.67033 46.6% - 14s 0 0 2.67033 0 2998 5.00000 2.67033 46.6% - 16s 0 0 2.67033 0 3017 5.00000 2.67033 46.6% - 17s 0 0 2.67033 0 2956 5.00000 2.67033 46.6% - 19s 0 0 2.67033 0 3017 5.00000 2.67033 46.6% - 21s 0 0 2.67033 0 2953 5.00000 2.67033 46.6% - 23s 0 0 2.67033 0 2924 5.00000 2.67033 46.6% - 25s 0 0 2.67033 0 2981 5.00000 2.67033 46.6% - 27s 0 0 2.67033 0 2981 5.00000 2.67033 46.6% - 27s 0 2 2.80000 0 2981 5.00000 2.80000 44.0% - 33s * 24 4 17 4.0000000 3.00000 25.0% 331 34s Cutting planes: Clique: 73 Zero half: 6 Explored 29 nodes (84603 simplex iterations) in 34.65 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%