Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:09:21 2012 Optimize a model with 413 rows, 412 columns and 1442 nonzeros Presolve removed 0 rows and 27 columns Presolve time: 0.00s Presolved: 413 rows, 385 columns, 1415 nonzeros Variable types: 0 continuous, 385 integer (384 binary) Found heuristic solution: objective 74.0000000 Root relaxation: objective 0.000000e+00, 257 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 0 168 74.00000 0.00000 100% - 0s H 0 0 60.0000000 0.00000 100% - 0s H 0 0 57.0000000 0.00000 100% - 0s 0 0 0.23621 0 170 57.00000 0.23621 100% - 0s H 0 0 44.0000000 0.23621 99.5% - 0s 0 0 0.74741 0 178 44.00000 0.74741 98.3% - 0s H 0 0 32.0000000 0.74741 97.7% - 0s 0 0 0.74741 0 180 32.00000 0.74741 97.7% - 0s 0 0 0.74741 0 179 32.00000 0.74741 97.7% - 0s 0 2 0.75068 0 178 32.00000 0.75068 97.7% - 0s H 27 27 27.0000000 1.00000 96.3% 26.6 0s H 54 54 12.0000000 1.00000 91.7% 18.8 0s H 81 31 10.0000000 1.00000 90.0% 15.0 0s H 216 51 9.0000000 1.61052 82.1% 27.5 0s Cutting planes: Gomory: 4 Zero half: 1 Mod-K: 2 Explored 413 nodes (12960 simplex iterations) in 0.48 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 9.000000000000e+00, best bound 9.000000000000e+00, gap 0.0%