Gurobi 5.0.1 (linux64) logging started Sun Nov 18 08:04:11 2012 Optimize a model with 533 rows, 500 columns and 1830 nonzeros Presolve removed 0 rows and 17 columns Presolve time: 0.00s Presolved: 533 rows, 483 columns, 1813 nonzeros Variable types: 0 continuous, 483 integer (482 binary) Found heuristic solution: objective 106.0000000 Root relaxation: objective 0.000000e+00, 272 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 0 204 106.00000 0.00000 100% - 0s H 0 0 74.0000000 0.00000 100% - 0s H 0 0 71.0000000 0.00000 100% - 0s 0 0 0.48163 0 205 71.00000 0.48163 99.3% - 0s H 0 0 55.0000000 0.48163 99.1% - 0s 0 0 1.00000 0 204 55.00000 1.00000 98.2% - 0s H 0 0 51.0000000 1.00000 98.0% - 0s 0 0 1.03519 0 206 51.00000 1.03519 98.0% - 0s H 0 0 38.0000000 1.03519 97.3% - 0s 0 0 1.05173 0 211 38.00000 1.05173 97.2% - 0s 0 0 1.05173 0 210 38.00000 1.05173 97.2% - 0s 0 2 1.05179 0 210 38.00000 1.05179 97.2% - 0s * 48 35 28 20.0000000 1.05194 94.7% 43.4 0s * 168 92 23 19.0000000 1.25853 93.4% 32.7 0s H 217 87 18.0000000 1.41991 92.1% 31.0 0s * 480 145 13 17.0000000 4.58114 73.1% 33.0 0s 3067 484 15.05063 19 182 17.00000 11.00000 35.3% 28.6 5s Explored 5776 nodes (161894 simplex iterations) in 8.90 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.700000000000e+01, best bound 1.700000000000e+01, gap 0.0%