Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:41 2012 Optimize a model with 210 rows, 62 columns and 420 nonzeros Presolve removed 76 rows and 4 columns Presolve time: 0.00s Presolved: 134 rows, 58 columns, 318 nonzeros Variable types: 0 continuous, 58 integer (58 binary) Found heuristic solution: objective 20.0000000 Root relaxation: objective 2.525000e+01, 99 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 25.25000 0 56 20.00000 25.25000 26.2% - 0s 0 0 24.68571 0 56 20.00000 24.68571 23.4% - 0s H 0 0 22.0000000 24.68571 12.2% - 0s 0 0 24.56667 0 57 22.00000 24.56667 11.7% - 0s 0 0 24.39796 0 57 22.00000 24.39796 10.9% - 0s 0 0 24.37500 0 58 22.00000 24.37500 10.8% - 0s 0 0 24.33333 0 57 22.00000 24.33333 10.6% - 0s 0 0 24.31685 0 57 22.00000 24.31685 10.5% - 0s 0 0 24.29936 0 58 22.00000 24.29936 10.5% - 0s 0 0 24.28030 0 56 22.00000 24.28030 10.4% - 0s 0 0 24.23684 0 58 22.00000 24.23684 10.2% - 0s 0 0 24.21053 0 56 22.00000 24.21053 10.0% - 0s 0 0 24.14286 0 58 22.00000 24.14286 9.74% - 0s 0 0 24.08571 0 58 22.00000 24.08571 9.48% - 0s 0 0 24.05495 0 58 22.00000 24.05495 9.34% - 0s 0 0 24.03717 0 58 22.00000 24.03717 9.26% - 0s 0 0 24.03717 0 58 22.00000 24.03717 9.26% - 0s 0 2 24.02244 0 58 22.00000 24.02244 9.19% - 0s Cutting planes: Zero half: 24 Explored 23 nodes (636 simplex iterations) in 0.05 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.200000000000e+01, best bound 2.200000000000e+01, gap 0.0%