Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:52:33 2012 Optimize a model with 509 rows, 477 columns and 1747 nonzeros Presolve removed 0 rows and 16 columns Presolve time: 0.00s Presolved: 509 rows, 461 columns, 1731 nonzeros Variable types: 0 continuous, 461 integer (460 binary) Found heuristic solution: objective 79.0000000 Root relaxation: objective 0.000000e+00, 285 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 0 188 79.00000 0.00000 100% - 0s H 0 0 75.0000000 0.00000 100% - 0s H 0 0 69.0000000 0.00000 100% - 0s H 0 0 66.0000000 0.00000 100% - 0s 0 0 0.25253 0 190 66.00000 0.25253 100% - 0s H 0 0 56.0000000 0.25253 100% - 0s 0 0 0.86176 0 195 56.00000 0.86176 98.5% - 0s H 0 0 40.0000000 0.86176 97.8% - 0s 0 0 0.86176 0 197 40.00000 0.86176 97.8% - 0s 0 0 0.86176 0 197 40.00000 0.86176 97.8% - 0s 0 2 0.87235 0 197 40.00000 0.87235 97.8% - 0s H 27 27 33.0000000 1.00000 97.0% 62.6 0s H 54 54 26.0000000 1.00000 96.2% 42.0 0s * 57 53 36 23.0000000 1.00000 95.7% 40.7 0s * 84 53 18 19.0000000 1.00000 94.7% 39.6 0s * 261 139 22 18.0000000 1.13650 93.7% 40.4 0s * 1521 73 24 17.0000000 13.35484 21.4% 33.2 2s Explored 1655 nodes (54393 simplex iterations) in 2.63 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%