Gurobi 5.0.1 (linux64) logging started Sun Nov 18 09:11:46 2012 Optimize a model with 573 rows, 527 columns and 1957 nonzeros Presolve removed 0 rows and 14 columns Presolve time: 0.00s Presolved: 573 rows, 513 columns, 1943 nonzeros Variable types: 0 continuous, 513 integer (512 binary) Found heuristic solution: objective 113.0000000 Root relaxation: objective 0.000000e+00, 298 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 0 224 113.00000 0.00000 100% - 0s H 0 0 73.0000000 0.00000 100% - 0s 0 0 0.33897 0 226 73.00000 0.33897 100% - 0s H 0 0 54.0000000 0.33897 99.4% - 0s 0 0 0.84007 0 228 54.00000 0.84007 98.4% - 0s H 0 0 40.0000000 0.84007 97.9% - 0s 0 0 0.84086 0 228 40.00000 0.84086 97.9% - 0s 0 0 0.84086 0 228 40.00000 0.84086 97.9% - 0s 0 2 0.85763 0 228 40.00000 0.85763 97.9% - 0s H 27 27 38.0000000 1.00000 97.4% 34.2 0s * 40 40 23 19.0000000 1.00000 94.7% 33.0 0s 3150 566 17.34104 21 202 19.00000 12.76136 32.8% 28.6 5s * 6600 160 30 18.0000000 16.10714 10.5% 26.2 9s Explored 6778 nodes (176329 simplex iterations) in 9.57 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.800000000000e+01, best bound 1.800000000000e+01, gap 0.0%