Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:41 2012 Optimize a model with 200 rows, 64 columns and 400 nonzeros Presolve removed 73 rows and 7 columns Presolve time: 0.00s Presolved: 127 rows, 57 columns, 284 nonzeros Variable types: 0 continuous, 57 integer (57 binary) Found heuristic solution: objective 21.0000000 Root relaxation: objective 2.620000e+01, 71 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 26.20000 0 50 21.00000 26.20000 24.8% - 0s H 0 0 22.0000000 26.20000 19.1% - 0s 0 0 25.33333 0 41 22.00000 25.33333 15.2% - 0s H 0 0 23.0000000 25.33333 10.1% - 0s 0 0 25.00000 0 49 23.00000 25.00000 8.70% - 0s H 0 0 24.0000000 25.00000 4.17% - 0s 0 0 cutoff 0 24.00000 24.99997 4.17% - 0s Cutting planes: Zero half: 25 Explored 0 nodes (156 simplex iterations) in 0.01 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%