Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:42 2012 Optimize a model with 243 rows, 68 columns and 486 nonzeros Presolve removed 80 rows and 2 columns Presolve time: 0.00s Presolved: 163 rows, 66 columns, 379 nonzeros Variable types: 0 continuous, 66 integer (66 binary) Found heuristic solution: objective 21.0000000 Root relaxation: objective 2.707692e+01, 103 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 27.07692 0 64 21.00000 27.07692 28.9% - 0s H 0 0 22.0000000 27.07692 23.1% - 0s 0 0 26.29767 0 63 22.00000 26.29767 19.5% - 0s 0 0 26.15918 0 64 22.00000 26.15918 18.9% - 0s H 0 0 24.0000000 26.15918 9.00% - 0s 0 0 26.05029 0 64 24.00000 26.05029 8.54% - 0s 0 0 25.91645 0 65 24.00000 25.91645 7.99% - 0s 0 0 25.75510 0 62 24.00000 25.75510 7.31% - 0s 0 0 25.74026 0 65 24.00000 25.74026 7.25% - 0s 0 0 25.74026 0 64 24.00000 25.74026 7.25% - 0s 0 2 25.74026 0 64 24.00000 25.74026 7.25% - 0s Cutting planes: Zero half: 19 Explored 19 nodes (478 simplex iterations) in 0.03 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.400000000000e+01, best bound 2.400000000000e+01, gap 0.0%