Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:19:47 2012 Optimize a model with 503 rows, 464 columns and 1719 nonzeros Presolve removed 0 rows and 25 columns Presolve time: 0.00s Presolved: 503 rows, 439 columns, 1694 nonzeros Variable types: 0 continuous, 439 integer (438 binary) Found heuristic solution: objective 90.0000000 Root relaxation: objective 0.000000e+00, 231 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 0 180 90.00000 0.00000 100% - 0s H 0 0 71.0000000 0.00000 100% - 0s H 0 0 63.0000000 0.00000 100% - 0s H 0 0 55.0000000 0.00000 100% - 0s 0 0 0.44293 0 181 55.00000 0.44293 99.2% - 0s H 0 0 49.0000000 0.44293 99.1% - 0s 0 0 1.00505 0 184 49.00000 1.00505 97.9% - 0s H 0 0 45.0000000 1.00505 97.8% - 0s 0 0 1.00505 0 182 45.00000 1.00505 97.8% - 0s H 0 0 42.0000000 1.00505 97.6% - 0s 0 0 1.00552 0 185 42.00000 1.00552 97.6% - 0s 0 0 1.00552 0 184 42.00000 1.00552 97.6% - 0s H 0 0 41.0000000 1.00552 97.5% - 0s 0 2 1.00676 0 184 41.00000 1.00676 97.5% - 0s H 81 68 21.0000000 2.50624 88.1% 26.0 0s * 93 42 53 20.0000000 2.50624 87.5% 24.5 0s * 128 51 17 19.0000000 2.55411 86.6% 24.5 0s * 231 88 15 18.0000000 5.42405 69.9% 29.0 0s Cutting planes: Gomory: 2 Zero half: 2 Mod-K: 1 Explored 912 nodes (26651 simplex iterations) in 1.14 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%