Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:47 2012 Optimize a model with 302 rows, 77 columns and 604 nonzeros Presolve removed 91 rows and 0 columns Presolve time: 0.00s Presolved: 211 rows, 77 columns, 490 nonzeros Variable types: 0 continuous, 77 integer (77 binary) Found heuristic solution: objective 22.0000000 Root relaxation: objective 2.975000e+01, 137 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 29.75000 0 64 22.00000 29.75000 35.2% - 0s H 0 0 23.0000000 29.75000 29.3% - 0s 0 0 29.00000 0 71 23.00000 29.00000 26.1% - 0s H 0 0 24.0000000 29.00000 20.8% - 0s 0 0 28.91837 0 75 24.00000 28.91837 20.5% - 0s H 0 0 25.0000000 28.91837 15.7% - 0s 0 0 28.83902 0 74 25.00000 28.83902 15.4% - 0s 0 0 28.75564 0 76 25.00000 28.75564 15.0% - 0s 0 0 28.70330 0 74 25.00000 28.70330 14.8% - 0s 0 0 28.51500 0 76 25.00000 28.51500 14.1% - 0s 0 0 28.44330 0 76 25.00000 28.44330 13.8% - 0s 0 0 28.36792 0 75 25.00000 28.36792 13.5% - 0s 0 0 28.33333 0 76 25.00000 28.33333 13.3% - 0s 0 0 28.26388 0 75 25.00000 28.26388 13.1% - 0s 0 0 28.16667 0 75 25.00000 28.16667 12.7% - 0s 0 0 28.11709 0 75 25.00000 28.11709 12.5% - 0s 0 0 28.09350 0 77 25.00000 28.09350 12.4% - 0s 0 0 28.08824 0 77 25.00000 28.08824 12.4% - 0s 0 0 28.08824 0 76 25.00000 28.08824 12.4% - 0s 0 2 28.08824 0 75 25.00000 28.08824 12.4% - 0s * 57 1 9 26.0000000 26.00000 0.0% 19.0 0s Cutting planes: Gomory: 1 Clique: 1 Zero half: 59 Explored 58 nodes (1699 simplex iterations) in 0.09 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.600000000000e+01, best bound 2.600000000000e+01, gap 0.0%