Gurobi 5.0.1 (linux64) logging started Sun Nov 18 04:30:42 2012 Optimize a model with 467 rows, 326 columns and 1491 nonzeros Presolve time: 0.00s Presolved: 467 rows, 326 columns, 1491 nonzeros Variable types: 0 continuous, 326 integer (326 binary) Found heuristic solution: objective 93.0000000 Root relaxation: objective 0.000000e+00, 124 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 92 93.00000 0.00000 100% - 0s H 0 0 87.0000000 0.00000 100% - 0s H 0 0 83.0000000 0.00000 100% - 0s 0 0 0.54878 0 93 83.00000 0.54878 99.3% - 0s H 0 0 81.0000000 0.54878 99.3% - 0s 0 0 0.56867 0 97 81.00000 0.56867 99.3% - 0s 0 0 0.60310 0 97 81.00000 0.60310 99.3% - 0s 0 0 0.66712 0 97 81.00000 0.66712 99.2% - 0s 0 0 0.68134 0 97 81.00000 0.68134 99.2% - 0s 0 0 0.70430 0 97 81.00000 0.70430 99.1% - 0s H 0 0 75.0000000 0.70430 99.1% - 0s 0 0 0.74319 0 97 75.00000 0.74319 99.0% - 0s 0 0 0.75057 0 99 75.00000 0.75057 99.0% - 0s H 0 0 71.0000000 0.75057 98.9% - 0s 0 2 0.76937 0 99 71.00000 0.76937 98.9% - 0s H 45 45 68.0000000 4.51169 93.4% 34.1 0s * 49 49 29 65.0000000 4.51169 93.1% 32.3 0s * 98 75 30 51.0000000 4.52759 91.1% 28.3 0s H 189 115 47.0000000 7.56098 83.9% 29.7 0s * 680 308 32 44.0000000 16.79200 61.8% 29.1 1s H 2000 458 43.0000000 25.44444 40.8% 26.9 2s H 2027 456 42.0000000 25.61538 39.0% 26.9 2s H 2112 441 41.0000000 25.97143 36.7% 26.9 2s 3682 423 32.25926 23 139 41.00000 29.51807 28.0% 26.1 5s Explored 6272 nodes (157327 simplex iterations) in 7.63 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.100000000000e+01, best bound 4.100000000000e+01, gap 0.0%