Gurobi 5.0.1 (linux64) logging started Fri Nov 16 07:46:14 2012 Optimize a model with 11159 rows, 3906 columns and 37074 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.30s Presolved: 11157 rows, 3904 columns, 36714 nonzeros Variable types: 0 continuous, 3904 integer (3904 binary) Found heuristic solution: objective 62.0000000 Root relaxation: objective 2.000000e+00, 2827 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 53.0000000 2.00000 96.2% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 336 5.00000 2.66667 46.7% - 1s H 0 0 4.0000000 2.66667 33.3% - 2s 0 0 2.68182 0 3252 4.00000 2.68182 33.0% - 3s 0 0 2.68182 0 3252 4.00000 2.68182 33.0% - 5s 0 0 2.68182 0 3006 4.00000 2.68182 33.0% - 12s 0 0 2.68182 0 2803 4.00000 2.68182 33.0% - 17s 0 0 2.68182 0 2884 4.00000 2.68182 33.0% - 23s 0 0 2.68182 0 2969 4.00000 2.68182 33.0% - 29s 0 0 2.68182 0 3028 4.00000 2.68182 33.0% - 34s 0 0 2.68182 0 2951 4.00000 2.68182 33.0% - 41s 0 0 2.68182 0 3065 4.00000 2.68182 33.0% - 45s 0 0 2.68182 0 3065 4.00000 2.68182 33.0% - 49s 0 1 3.00000 0 3065 4.00000 3.00000 25.0% - 64s 2 3 3.00000 2 139 4.00000 3.00000 25.0% 7429 65s Cutting planes: Clique: 124 Zero half: 27 Explored 14 nodes (162479 simplex iterations) in 66.42 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%