Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:44:42 2012 Optimize a model with 493 rows, 467 columns and 1697 nonzeros Presolve removed 0 rows and 18 columns Presolve time: 0.00s Presolved: 493 rows, 449 columns, 1679 nonzeros Variable types: 0 continuous, 449 integer (448 binary) Found heuristic solution: objective 95.0000000 Root relaxation: objective 0.000000e+00, 259 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 0 193 95.00000 0.00000 100% - 0s H 0 0 57.0000000 0.00000 100% - 0s 0 0 0.42784 0 195 57.00000 0.42784 99.2% - 0s H 0 0 42.0000000 0.42784 99.0% - 0s 0 0 0.96271 0 197 42.00000 0.96271 97.7% - 0s H 0 0 41.0000000 0.96271 97.7% - 0s H 0 0 31.0000000 0.96271 96.9% - 0s 0 2 0.96286 0 197 31.00000 0.96286 96.9% - 0s * 53 31 31 14.0000000 1.25509 91.0% 31.4 0s * 127 75 11 13.0000000 1.37340 89.4% 36.7 0s * 430 85 12 12.0000000 5.87778 51.0% 29.4 0s Cutting planes: Gomory: 3 Zero half: 3 Explored 791 nodes (25863 simplex iterations) in 1.09 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.200000000000e+01, best bound 1.200000000000e+01, gap 0.0%