Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:48:25 2012 Optimize a model with 509 rows, 476 columns and 1746 nonzeros Presolve removed 0 rows and 20 columns Presolve time: 0.00s Presolved: 509 rows, 456 columns, 1726 nonzeros Variable types: 0 continuous, 456 integer (455 binary) Found heuristic solution: objective 105.0000000 Root relaxation: objective 0.000000e+00, 248 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 0 198 105.00000 0.00000 100% - 0s H 0 0 72.0000000 0.00000 100% - 0s 0 0 0.38288 0 200 72.00000 0.38288 99.5% - 0s H 0 0 55.0000000 0.38288 99.3% - 0s 0 0 0.86157 0 203 55.00000 0.86157 98.4% - 0s H 0 0 53.0000000 0.86157 98.4% - 0s 0 0 0.86281 0 205 53.00000 0.86281 98.4% - 0s 0 0 0.86281 0 205 53.00000 0.86281 98.4% - 0s H 0 0 52.0000000 0.86281 98.3% - 0s H 0 0 40.0000000 0.86281 97.8% - 0s 0 2 0.86582 0 205 40.00000 0.86582 97.8% - 0s H 27 27 35.0000000 1.00000 97.1% 53.9 0s * 38 38 21 19.0000000 1.00000 94.7% 46.1 0s * 76 55 20 18.0000000 1.00000 94.4% 38.2 0s H 464 209 17.0000000 5.80220 65.9% 34.1 0s * 479 190 14 16.0000000 6.00000 62.5% 34.6 0s H 1770 77 15.0000000 11.75893 21.6% 32.3 2s Explored 1883 nodes (61004 simplex iterations) in 2.65 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.500000000000e+01, best bound 1.500000000000e+01, gap 0.0%