Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:41 2012 Optimize a model with 189 rows, 62 columns and 378 nonzeros Presolve removed 58 rows and 0 columns Presolve time: 0.00s Presolved: 131 rows, 62 columns, 302 nonzeros Variable types: 0 continuous, 62 integer (62 binary) Found heuristic solution: objective 22.0000000 Root relaxation: objective 2.600000e+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 26.00000 0 52 22.00000 26.00000 18.2% - 0s H 0 0 24.0000000 26.00000 8.33% - 0s 0 0 25.33333 0 56 24.00000 25.33333 5.56% - 0s 0 0 25.16667 0 58 24.00000 25.16667 4.86% - 0s H 0 0 25.0000000 25.16667 0.67% - 0s Cutting planes: Gomory: 2 Zero half: 6 Explored 0 nodes (192 simplex iterations) in 0.01 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%