Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:33:32 2012 Optimize a model with 275 rows, 297 columns and 982 nonzeros Presolve removed 0 rows and 26 columns Presolve time: 0.00s Presolved: 275 rows, 271 columns, 956 nonzeros Variable types: 0 continuous, 271 integer (270 binary) Found heuristic solution: objective 40.0000000 Root relaxation: objective 0.000000e+00, 172 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 97 40.00000 0.00000 100% - 0s H 0 0 35.0000000 0.00000 100% - 0s H 0 0 34.0000000 0.00000 100% - 0s H 0 0 24.0000000 0.00000 100% - 0s H 0 0 21.0000000 0.00000 100% - 0s 0 0 0.00000 0 98 21.00000 0.00000 100% - 0s H 0 0 19.0000000 0.00000 100% - 0s 0 0 0.00000 0 97 19.00000 0.00000 100% - 0s H 0 0 14.0000000 0.00000 100% - 0s H 0 0 7.0000000 0.00000 100% - 0s H 0 0 6.0000000 0.00000 100% - 0s H 0 0 5.0000000 0.00000 100% - 0s 0 2 0.00000 0 97 5.00000 0.00000 100% - 0s * 21 14 20 4.0000000 1.27957 68.0% 23.6 0s Cutting planes: Gomory: 1 Explored 54 nodes (1546 simplex iterations) in 0.14 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.000000000000e+00, best bound 4.000000000000e+00, gap 0.0%