Gurobi 5.0.1 (linux64) logging started Sun Nov 18 04:23:06 2012 Optimize a model with 449 rows, 315 columns and 1435 nonzeros Presolve time: 0.00s Presolved: 449 rows, 315 columns, 1435 nonzeros Variable types: 0 continuous, 315 integer (315 binary) Found heuristic solution: objective 92.0000000 Root relaxation: objective 0.000000e+00, 120 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 91 92.00000 0.00000 100% - 0s H 0 0 85.0000000 0.00000 100% - 0s 0 0 0.65714 0 93 85.00000 0.65714 99.2% - 0s H 0 0 84.0000000 0.65714 99.2% - 0s 0 0 0.66780 0 93 84.00000 0.66780 99.2% - 0s 0 0 0.66780 0 93 84.00000 0.66780 99.2% - 0s 0 0 0.66780 0 93 84.00000 0.66780 99.2% - 0s H 0 0 80.0000000 0.66780 99.2% - 0s H 0 0 79.0000000 0.66780 99.2% - 0s 0 2 0.67356 0 93 79.00000 0.67356 99.1% - 0s * 53 50 31 57.0000000 3.07937 94.6% 32.3 0s * 149 123 27 56.0000000 5.77778 89.7% 31.2 0s * 241 198 26 52.0000000 6.02771 88.4% 30.8 0s * 444 355 24 50.0000000 9.33075 81.3% 29.2 0s H 461 350 49.0000000 9.33075 81.0% 28.4 0s * 1094 558 36 48.0000000 15.25000 68.2% 30.8 1s * 1247 556 32 47.0000000 18.39241 60.9% 30.4 1s 4053 977 41.94030 24 143 47.00000 28.87013 38.6% 25.0 5s 9494 1506 cutoff 26 47.00000 33.77419 28.1% 23.4 10s 15549 1603 45.59155 25 150 47.00000 36.71429 21.9% 22.6 15s *18256 1409 27 46.0000000 37.66667 18.1% 22.3 17s 22096 986 44.47143 25 153 46.00000 39.02778 15.2% 21.8 20s Explored 25860 nodes (549924 simplex iterations) in 22.39 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.600000000000e+01, best bound 4.600000000000e+01, gap 0.0%