Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:41 2012 Optimize a model with 199 rows, 62 columns and 398 nonzeros Presolve removed 58 rows and 3 columns Presolve time: 0.00s Presolved: 141 rows, 59 columns, 313 nonzeros Variable types: 0 continuous, 59 integer (59 binary) Found heuristic solution: objective 19.0000000 Root relaxation: objective 2.550000e+01, 90 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 25.50000 0 43 19.00000 25.50000 34.2% - 0s H 0 0 21.0000000 25.50000 21.4% - 0s 0 0 24.52941 0 55 21.00000 24.52941 16.8% - 0s 0 0 24.50000 0 47 21.00000 24.50000 16.7% - 0s H 0 0 22.0000000 24.50000 11.4% - 0s 0 0 24.16667 0 55 22.00000 24.16667 9.85% - 0s 0 0 24.14286 0 56 22.00000 24.14286 9.74% - 0s 0 0 24.08621 0 57 22.00000 24.08621 9.48% - 0s 0 0 24.01183 0 56 22.00000 24.01183 9.14% - 0s 0 0 24.00000 0 53 22.00000 24.00000 9.09% - 0s 0 0 23.76923 0 59 22.00000 23.76923 8.04% - 0s 0 0 23.68293 0 59 22.00000 23.68293 7.65% - 0s 0 0 23.65248 0 59 22.00000 23.65248 7.51% - 0s 0 0 23.61268 0 59 22.00000 23.61268 7.33% - 0s 0 0 23.56107 0 58 22.00000 23.56107 7.10% - 0s 0 0 23.52347 0 57 22.00000 23.52347 6.92% - 0s 0 0 23.51754 0 58 22.00000 23.51754 6.90% - 0s 0 0 23.51754 0 57 22.00000 23.51754 6.90% - 0s 0 2 23.50000 0 57 22.00000 23.50000 6.82% - 0s Cutting planes: Gomory: 2 Zero half: 23 Explored 13 nodes (623 simplex iterations) in 0.04 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%