Gurobi 5.0.1 (linux64) logging started Fri Nov 16 07:22:28 2012 Optimize a model with 11772 rows, 3782 columns and 38794 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.31s Presolved: 11770 rows, 3780 columns, 38408 nonzeros Variable types: 0 continuous, 3780 integer (3780 binary) Found heuristic solution: objective 61.0000000 Root relaxation: objective 2.000000e+00, 2733 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 0 122 61.00000 2.00000 96.7% - 0s H 0 0 45.0000000 2.00000 95.6% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 399 5.00000 2.66667 46.7% - 1s 0 0 2.68605 0 3355 5.00000 2.68605 46.3% - 2s 0 0 2.68605 0 3274 5.00000 2.68605 46.3% - 3s 0 0 2.68605 0 3280 5.00000 2.68605 46.3% - 4s 0 0 2.68605 0 2876 5.00000 2.68605 46.3% - 6s 0 0 2.68605 0 2873 5.00000 2.68605 46.3% - 7s 0 0 2.68605 0 2901 5.00000 2.68605 46.3% - 8s 0 0 2.68605 0 2943 5.00000 2.68605 46.3% - 9s 0 0 2.68605 0 2940 5.00000 2.68605 46.3% - 10s 0 0 2.68605 0 2949 5.00000 2.68605 46.3% - 12s 0 0 2.68605 0 2878 5.00000 2.68605 46.3% - 13s 0 1 3.00000 0 2878 5.00000 3.00000 40.0% - 20s * 25 5 22 4.0000000 3.00000 25.0% 502 21s Cutting planes: Clique: 194 Zero half: 18 Explored 35 nodes (48912 simplex iterations) in 22.10 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%