Gurobi 5.0.1 (linux64) logging started Sun Nov 18 02:26:37 2012 Optimize a model with 425 rows, 276 columns and 1336 nonzeros Presolve time: 0.00s Presolved: 425 rows, 276 columns, 1336 nonzeros Variable types: 0 continuous, 276 integer (276 binary) Found heuristic solution: objective 94.0000000 Root relaxation: objective 0.000000e+00, 99 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 64 94.00000 0.00000 100% - 0s H 0 0 85.0000000 0.00000 100% - 0s 0 0 0.75000 0 66 85.00000 0.75000 99.1% - 0s 0 0 0.75000 0 66 85.00000 0.75000 99.1% - 0s 0 0 0.79631 0 69 85.00000 0.79631 99.1% - 0s 0 0 0.86402 0 71 85.00000 0.86402 99.0% - 0s 0 0 0.97904 0 73 85.00000 0.97904 98.8% - 0s 0 0 0.98952 0 72 85.00000 0.98952 98.8% - 0s 0 0 1.06288 0 74 85.00000 1.06288 98.7% - 0s H 0 0 77.0000000 1.06288 98.6% - 0s 0 0 1.08751 0 67 77.00000 1.08751 98.6% - 0s 0 0 1.09519 0 66 77.00000 1.09519 98.6% - 0s 0 0 1.09613 0 72 77.00000 1.09613 98.6% - 0s 0 2 1.10519 0 72 77.00000 1.10519 98.6% - 0s * 54 52 34 63.0000000 6.20045 90.2% 29.4 0s H 56 46 62.0000000 6.20045 90.0% 28.4 0s * 534 370 25 60.0000000 16.71970 72.1% 23.3 0s * 752 449 37 59.0000000 17.47826 70.4% 23.7 1s * 1048 546 39 57.0000000 17.47826 69.3% 26.9 1s * 1333 561 32 54.0000000 19.33333 64.2% 27.7 1s * 2239 639 31 52.0000000 26.92308 48.2% 27.4 2s 4373 1018 49.43137 26 134 52.00000 32.00000 38.5% 26.5 5s 9943 1562 51.00000 27 139 52.00000 37.40741 28.1% 25.1 10s *14190 1552 29 51.0000000 39.66667 22.2% 24.4 13s 16591 1398 43.05769 25 131 51.00000 40.89189 19.8% 24.1 15s Explored 23621 nodes (543836 simplex iterations) in 19.62 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.100000000000e+01, best bound 5.100000000000e+01, gap 0.0%