Gurobi 5.0.1 (linux64) logging started Fri Nov 16 07:04:49 2012 Optimize a model with 10499 rows, 3660 columns and 34858 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.26s Presolved: 10557 rows, 3658 columns, 38108 nonzeros Variable types: 0 continuous, 3658 integer (3658 binary) Found heuristic solution: objective 60.0000000 Root relaxation: objective 2.000000e+00, 2649 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 58.0000000 2.00000 96.6% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s H 0 0 4.0000000 2.00000 50.0% - 0s 0 0 2.66667 0 158 4.00000 2.66667 33.3% - 1s 0 0 2.67052 0 3026 4.00000 2.67052 33.2% - 1s 0 0 2.67052 0 3004 4.00000 2.67052 33.2% - 2s 0 0 2.67052 0 2998 4.00000 2.67052 33.2% - 3s 0 0 2.67052 0 2998 4.00000 2.67052 33.2% - 3s 0 0 2.67052 0 2497 4.00000 2.67052 33.2% - 5s 0 0 2.67052 0 2466 4.00000 2.67052 33.2% - 6s 0 0 2.67052 0 2505 4.00000 2.67052 33.2% - 7s 0 0 2.67052 0 2586 4.00000 2.67052 33.2% - 8s 0 0 2.67052 0 2603 4.00000 2.67052 33.2% - 9s 0 0 2.67052 0 2587 4.00000 2.67052 33.2% - 10s 0 0 2.67052 0 2629 4.00000 2.67052 33.2% - 11s 0 0 2.67052 0 2575 4.00000 2.67052 33.2% - 12s 0 2 2.80000 0 2575 4.00000 2.80000 30.0% - 14s 8 0 cutoff 1 4.00000 4.00000 0.0% 649 15s Cutting planes: Clique: 63 Zero half: 5 Explored 9 nodes (45401 simplex iterations) in 15.60 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%