Gurobi 5.0.1 (linux64) logging started Sun Nov 18 07:40:18 2012 Optimize a model with 561 rows, 511 columns and 1911 nonzeros Presolve removed 0 rows and 20 columns Presolve time: 0.00s Presolved: 561 rows, 491 columns, 1891 nonzeros Variable types: 0 continuous, 491 integer (490 binary) Found heuristic solution: objective 103.0000000 Root relaxation: objective 0.000000e+00, 301 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 195 103.00000 0.00000 100% - 0s H 0 0 93.0000000 0.00000 100% - 0s H 0 0 81.0000000 0.00000 100% - 0s H 0 0 77.0000000 0.00000 100% - 0s 0 0 0.37637 0 196 77.00000 0.37637 100% - 0s H 0 0 67.0000000 0.37637 99.4% - 0s 0 0 1.00000 0 199 67.00000 1.00000 98.5% - 0s H 0 0 62.0000000 1.00000 98.4% - 0s H 0 0 47.0000000 1.00000 97.9% - 0s 0 0 1.00000 0 202 47.00000 1.00000 97.9% - 0s 0 0 1.00000 0 199 47.00000 1.00000 97.9% - 0s 0 2 1.00000 0 199 47.00000 1.00000 97.9% - 0s H 27 27 43.0000000 1.00000 97.7% 65.4 0s * 44 44 24 25.0000000 1.00000 96.0% 50.5 0s H 381 239 24.0000000 1.39003 94.2% 34.3 0s * 669 349 45 23.0000000 6.40336 72.2% 33.9 1s * 670 325 46 22.0000000 6.40336 70.9% 33.9 1s 2710 599 14.51515 21 195 22.00000 13.49315 38.7% 27.9 5s 5938 767 19.89595 24 208 22.00000 15.97030 27.4% 25.8 10s 9273 434 cutoff 23 22.00000 17.87097 18.8% 25.0 15s Explored 10510 nodes (258591 simplex iterations) in 16.58 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.200000000000e+01, best bound 2.200000000000e+01, gap 0.0%