Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:41 2012 Optimize a model with 201 rows, 62 columns and 402 nonzeros Presolve removed 62 rows and 3 columns Presolve time: 0.00s Presolved: 139 rows, 59 columns, 322 nonzeros Variable types: 0 continuous, 59 integer (59 binary) Found heuristic solution: objective 20.0000000 Root relaxation: objective 2.514286e+01, 104 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 25.14286 0 51 20.00000 25.14286 25.7% - 0s H 0 0 21.0000000 25.14286 19.7% - 0s 0 0 24.57627 0 56 21.00000 24.57627 17.0% - 0s H 0 0 22.0000000 24.57627 11.7% - 0s 0 0 24.25926 0 58 22.00000 24.25926 10.3% - 0s 0 0 24.00000 0 53 22.00000 24.00000 9.09% - 0s 0 0 23.88462 0 54 22.00000 23.88462 8.57% - 0s 0 0 23.86228 0 58 22.00000 23.86228 8.46% - 0s 0 0 23.80000 0 58 22.00000 23.80000 8.18% - 0s 0 0 23.77206 0 59 22.00000 23.77206 8.05% - 0s 0 0 23.77154 0 59 22.00000 23.77154 8.05% - 0s 0 0 23.77154 0 59 22.00000 23.77154 8.05% - 0s 0 2 23.75908 0 59 22.00000 23.75908 8.00% - 0s Cutting planes: Gomory: 1 Zero half: 26 Explored 13 nodes (461 simplex iterations) in 0.03 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%