Gurobi 5.0.1 (linux64) logging started Fri Nov 16 06:48:12 2012 Optimize a model with 9793 rows, 3540 columns and 32625 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.23s Presolved: 9850 rows, 3538 columns, 35774 nonzeros Variable types: 0 continuous, 3538 integer (3538 binary) Found heuristic solution: objective 59.0000000 Root relaxation: objective 2.000000e+00, 2491 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 0 118 59.00000 2.00000 96.6% - 0s H 0 0 57.0000000 2.00000 96.5% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 2573 5.00000 2.66667 46.7% - 2s 0 0 2.66667 0 2017 5.00000 2.66667 46.7% - 2s H 0 0 4.0000000 2.66667 33.3% - 3s 0 0 2.66667 0 1699 4.00000 2.66667 33.3% - 4s 0 0 2.66667 0 1698 4.00000 2.66667 33.3% - 4s 0 0 2.66667 0 663 4.00000 2.66667 33.3% - 5s 0 0 2.66667 0 1341 4.00000 2.66667 33.3% - 5s 0 0 2.67059 0 2648 4.00000 2.67059 33.2% - 6s 0 0 2.67059 0 2673 4.00000 2.67059 33.2% - 7s 0 0 2.67059 0 2659 4.00000 2.67059 33.2% - 8s 0 0 2.67059 0 2639 4.00000 2.67059 33.2% - 9s 0 0 2.67059 0 2633 4.00000 2.67059 33.2% - 10s 0 0 2.67059 0 2627 4.00000 2.67059 33.2% - 10s 0 0 2.67059 0 2628 4.00000 2.67059 33.2% - 12s 0 0 2.67059 0 2627 4.00000 2.67059 33.2% - 13s 0 0 2.67059 0 2627 4.00000 2.67059 33.2% - 14s 0 0 2.67059 0 2627 4.00000 2.67059 33.2% - 15s 0 2 2.80000 0 2627 4.00000 2.80000 30.0% - 17s Cutting planes: Clique: 69 Zero half: 8 Explored 13 nodes (42003 simplex iterations) in 18.86 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%