Gurobi 5.0.1 (linux64) logging started Sun Nov 18 02:04:57 2012 Optimize a model with 413 rows, 269 columns and 1299 nonzeros Presolve time: 0.00s Presolved: 413 rows, 269 columns, 1299 nonzeros Variable types: 0 continuous, 269 integer (269 binary) Found heuristic solution: objective 87.0000000 Root relaxation: objective 0.000000e+00, 110 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 63 87.00000 0.00000 100% - 0s H 0 0 83.0000000 0.00000 100% - 0s 0 0 0.73369 0 65 83.00000 0.73369 99.1% - 0s 0 0 0.75250 0 65 83.00000 0.75250 99.1% - 0s 0 0 0.79953 0 65 83.00000 0.79953 99.0% - 0s 0 0 0.80894 0 65 83.00000 0.80894 99.0% - 0s 0 0 0.80894 0 65 83.00000 0.80894 99.0% - 0s 0 2 0.86876 0 65 83.00000 0.86876 99.0% - 0s * 45 45 24 61.0000000 3.54630 94.2% 35.7 0s * 412 334 25 60.0000000 12.33333 79.4% 31.0 0s * 591 435 21 59.0000000 15.75000 73.3% 29.9 0s H 595 404 57.0000000 15.75000 72.4% 29.7 0s H 1801 640 55.0000000 24.77778 54.9% 28.9 2s 4587 1369 39.88889 21 127 55.00000 31.89474 42.0% 25.8 5s * 6685 1803 34 54.0000000 35.00000 35.2% 24.7 6s 10452 2382 48.26531 24 136 54.00000 38.29412 29.1% 23.7 10s 16806 2600 cutoff 25 54.00000 41.36364 23.4% 23.8 15s *21288 2323 28 53.0000000 43.00000 18.9% 23.4 18s 23772 1993 50.95455 26 138 53.00000 43.87755 17.2% 23.3 20s *25217 1639 30 52.0000000 44.53846 14.3% 23.3 21s Explored 29135 nodes (668540 simplex iterations) in 23.63 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.200000000000e+01, best bound 5.200000000000e+01, gap 0.0%