Gurobi 5.0.1 (linux64) logging started Fri Nov 16 07:06:13 2012 Optimize a model with 11699 rows, 3660 columns and 38458 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.29s Presolved: 11757 rows, 3658 columns, 41668 nonzeros Variable types: 0 continuous, 3658 integer (3658 binary) Found heuristic solution: objective 60.0000000 Root relaxation: objective 2.000000e+00, 2729 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 0 118 60.00000 2.00000 96.7% - 0s H 0 0 59.0000000 2.00000 96.6% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 788 5.00000 2.66667 46.7% - 1s 0 0 2.67052 0 3346 5.00000 2.67052 46.6% - 2s 0 0 2.67052 0 3356 5.00000 2.67052 46.6% - 3s 0 0 2.67052 0 2969 5.00000 2.67052 46.6% - 6s 0 0 2.67052 0 2966 5.00000 2.67052 46.6% - 7s 0 0 2.67052 0 2889 5.00000 2.67052 46.6% - 9s 0 0 2.67052 0 2954 5.00000 2.67052 46.6% - 10s 0 0 2.67052 0 2949 5.00000 2.67052 46.6% - 11s 0 0 2.67052 0 2887 5.00000 2.67052 46.6% - 12s 0 0 2.67052 0 3012 5.00000 2.67052 46.6% - 13s 0 0 2.67052 0 2912 5.00000 2.67052 46.6% - 15s 0 0 2.67052 0 2867 5.00000 2.67052 46.6% - 16s 0 0 2.67052 0 2885 5.00000 2.67052 46.6% - 17s 0 0 2.67052 0 2895 5.00000 2.67052 46.6% - 18s 0 0 2.67052 0 2895 5.00000 2.67052 46.6% - 19s 0 2 2.80000 0 2895 5.00000 2.80000 44.0% - 25s * 24 5 15 4.0000000 3.00000 25.0% 357 26s Cutting planes: Clique: 91 Zero half: 5 Explored 29 nodes (67194 simplex iterations) in 27.81 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%