Gurobi 5.0.1 (linux64) logging started Fri Nov 16 06:44:21 2012 Optimize a model with 9793 rows, 3540 columns and 32625 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.24s Presolved: 9791 rows, 3538 columns, 32293 nonzeros Variable types: 0 continuous, 3538 integer (3538 binary) Found heuristic solution: objective 59.0000000 Root relaxation: objective 2.000000e+00, 2492 iterations, 0.07 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 118 59.00000 2.00000 96.6% - 0s H 0 0 50.0000000 2.00000 96.0% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 146 5.00000 2.66667 46.7% - 1s 0 0 2.67059 0 3092 5.00000 2.67059 46.6% - 2s H 0 0 4.0000000 2.67059 33.2% - 2s 0 0 2.67059 0 3094 4.00000 2.67059 33.2% - 2s 0 0 2.67059 0 2902 4.00000 2.67059 33.2% - 6s 0 0 2.67059 0 2797 4.00000 2.67059 33.2% - 8s 0 0 2.67059 0 2825 4.00000 2.67059 33.2% - 10s 0 0 2.67059 0 2816 4.00000 2.67059 33.2% - 13s 0 0 2.67059 0 2779 4.00000 2.67059 33.2% - 16s 0 0 2.67059 0 2849 4.00000 2.67059 33.2% - 18s 0 0 2.67059 0 2776 4.00000 2.67059 33.2% - 21s 0 0 2.67059 0 2667 4.00000 2.67059 33.2% - 23s 0 0 2.67059 0 2773 4.00000 2.67059 33.2% - 26s 0 0 2.67059 0 2715 4.00000 2.67059 33.2% - 29s 0 0 2.67059 0 2748 4.00000 2.67059 33.2% - 32s 0 0 2.67059 0 2748 4.00000 2.67059 33.2% - 33s 0 2 2.80000 0 2748 4.00000 2.80000 30.0% - 45s Cutting planes: Clique: 59 Zero half: 10 Explored 19 nodes (124498 simplex iterations) in 47.67 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%