Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:07:19 2012 Optimize a model with 447 rows, 427 columns and 1542 nonzeros Presolve removed 0 rows and 19 columns Presolve time: 0.00s Presolved: 447 rows, 408 columns, 1523 nonzeros Variable types: 0 continuous, 408 integer (407 binary) Found heuristic solution: objective 87.0000000 Root relaxation: objective 0.000000e+00, 227 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 0 178 87.00000 0.00000 100% - 0s H 0 0 61.0000000 0.00000 100% - 0s H 0 0 60.0000000 0.00000 100% - 0s H 0 0 55.0000000 0.00000 100% - 0s 0 0 0.52385 0 179 55.00000 0.52385 99.0% - 0s H 0 0 50.0000000 0.52385 99.0% - 0s 0 0 1.00000 0 183 50.00000 1.00000 98.0% - 0s H 0 0 45.0000000 1.00000 97.8% - 0s 0 0 1.00000 0 183 45.00000 1.00000 97.8% - 0s 0 0 1.00000 0 181 45.00000 1.00000 97.8% - 0s H 0 0 43.0000000 1.00000 97.7% - 0s H 0 0 42.0000000 1.00000 97.6% - 0s H 0 0 40.0000000 1.00000 97.5% - 0s 0 2 1.00000 0 181 40.00000 1.00000 97.5% - 0s H 27 27 18.0000000 1.00000 94.4% 42.2 0s H 54 26 14.0000000 1.00000 92.9% 25.3 0s * 149 64 19 13.0000000 1.10298 91.5% 29.6 0s Cutting planes: Gomory: 3 Mod-K: 1 Explored 775 nodes (23077 simplex iterations) in 0.88 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.300000000000e+01, best bound 1.300000000000e+01, gap 0.0%