Gurobi 5.0.1 (linux64) logging started Sun Nov 18 07:21:00 2012 Optimize a model with 537 rows, 496 columns and 1836 nonzeros Presolve removed 0 rows and 18 columns Presolve time: 0.00s Presolved: 537 rows, 478 columns, 1818 nonzeros Variable types: 0 continuous, 478 integer (477 binary) Found heuristic solution: objective 100.0000000 Root relaxation: objective 0.000000e+00, 269 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 0 196 100.00000 0.00000 100% - 0s H 0 0 81.0000000 0.00000 100% - 0s 0 0 0.39310 0 197 81.00000 0.39310 100% - 0s H 0 0 64.0000000 0.39310 99.4% - 0s 0 0 1.00000 0 196 64.00000 1.00000 98.4% - 0s H 0 0 62.0000000 1.00000 98.4% - 0s 0 0 1.05078 0 198 62.00000 1.05078 98.3% - 0s H 0 0 59.0000000 1.05078 98.2% - 0s 0 0 1.05475 0 202 59.00000 1.05475 98.2% - 0s 0 0 1.05475 0 202 59.00000 1.05475 98.2% - 0s H 0 0 58.0000000 1.05475 98.2% - 0s H 0 0 54.0000000 1.05475 98.0% - 0s H 0 0 41.0000000 1.05475 97.4% - 0s 0 2 1.05476 0 202 41.00000 1.05476 97.4% - 0s H 54 54 25.0000000 1.35732 94.6% 40.2 0s * 57 42 31 21.0000000 1.35732 93.5% 41.6 0s H 165 97 18.0000000 1.48022 91.8% 42.8 0s Explored 2289 nodes (70889 simplex iterations) in 3.89 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%