Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:44 2012 Optimize a model with 245 rows, 70 columns and 490 nonzeros Presolve removed 66 rows and 0 columns Presolve time: 0.00s Presolved: 179 rows, 70 columns, 411 nonzeros Variable types: 0 continuous, 70 integer (70 binary) Found heuristic solution: objective 20.0000000 Root relaxation: objective 2.875000e+01, 118 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 28.75000 0 66 20.00000 28.75000 43.8% - 0s H 0 0 23.0000000 28.75000 25.0% - 0s 0 0 27.92857 0 67 23.00000 27.92857 21.4% - 0s H 0 0 24.0000000 27.92857 16.4% - 0s 0 0 27.72000 0 67 24.00000 27.72000 15.5% - 0s 0 0 27.28000 0 64 24.00000 27.28000 13.7% - 0s 0 0 27.21667 0 68 24.00000 27.21667 13.4% - 0s H 0 0 25.0000000 27.21667 8.87% - 0s 0 0 27.11286 0 69 25.00000 27.11286 8.45% - 0s 0 0 26.94411 0 69 25.00000 26.94411 7.78% - 0s 0 0 26.91463 0 67 25.00000 26.91463 7.66% - 0s 0 0 26.83876 0 69 25.00000 26.83876 7.36% - 0s 0 0 26.69268 0 70 25.00000 26.69268 6.77% - 0s 0 0 26.67932 0 69 25.00000 26.67932 6.72% - 0s 0 0 26.60952 0 70 25.00000 26.60952 6.44% - 0s 0 0 26.59373 0 70 25.00000 26.59373 6.37% - 0s 0 0 26.59373 0 69 25.00000 26.59373 6.37% - 0s 0 2 26.59170 0 69 25.00000 26.59170 6.37% - 0s Cutting planes: Clique: 1 Zero half: 30 Explored 13 nodes (669 simplex iterations) in 0.05 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.500000000000e+01, best bound 2.500000000000e+01, gap 0.0%