Gurobi 5.0.1 (linux64) logging started Fri Nov 16 12:01:10 2012 Optimize a model with 17323 rows, 5112 columns and 56727 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.60s Presolved: 17321 rows, 5110 columns, 56239 nonzeros Variable types: 0 continuous, 5110 integer (5110 binary) Found heuristic solution: objective 71.0000000 Root relaxation: objective 2.000000e+00, 3705 iterations, 0.16 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 142 71.00000 2.00000 97.2% - 1s H 0 0 70.0000000 2.00000 97.1% - 1s H 0 0 5.0000000 2.00000 60.0% - 1s 0 0 3.00000 0 3172 5.00000 3.00000 40.0% - 9s 0 0 3.00730 0 3711 5.00000 3.00730 39.9% - 12s 0 0 3.00730 0 3850 5.00000 3.00730 39.9% - 15s 0 0 3.00730 0 3798 5.00000 3.00730 39.9% - 23s 0 0 3.00730 0 3779 5.00000 3.00730 39.9% - 30s 0 0 3.00730 0 3785 5.00000 3.00730 39.9% - 37s 0 0 3.00730 0 3764 5.00000 3.00730 39.9% - 45s 0 0 3.00730 0 3793 5.00000 3.00730 39.9% - 53s 0 0 3.00730 0 3794 5.00000 3.00730 39.9% - 60s 0 0 3.00730 0 3800 5.00000 3.00730 39.9% - 69s 0 0 3.00730 0 3800 5.00000 3.00730 39.9% - 75s 0 2 3.50000 0 3800 5.00000 3.50000 30.0% - 92s 2 2 4.00000 1 146 5.00000 4.00000 20.0% 14044 95s * 21 3 18 4.0000000 4.00000 0.0% 1717 96s Cutting planes: Clique: 41 Zero half: 12 Explored 22 nodes (254421 simplex iterations) in 96.62 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%