Gurobi 5.0.1 (linux64) logging started Sun Nov 18 04:14:30 2012 Optimize a model with 345 rows, 258 columns and 1118 nonzeros Presolve removed 0 rows and 1 columns Presolve time: 0.00s Presolved: 345 rows, 257 columns, 1117 nonzeros Variable types: 0 continuous, 257 integer (256 binary) Found heuristic solution: objective 81.0000000 Found heuristic solution: objective 77.0000000 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 84 77.00000 0.00000 100% - 0s H 0 0 67.0000000 0.00000 100% - 0s H 0 0 61.0000000 0.00000 100% - 0s 0 0 0.50030 0 85 61.00000 0.50030 99.2% - 0s H 0 0 59.0000000 0.50030 99.2% - 0s 0 0 1.00000 0 86 59.00000 1.00000 98.3% - 0s H 0 0 56.0000000 1.00000 98.2% - 0s 0 0 1.07153 0 87 56.00000 1.07153 98.1% - 0s 0 0 1.14071 0 88 56.00000 1.14071 98.0% - 0s 0 0 1.14351 0 89 56.00000 1.14351 98.0% - 0s 0 2 1.15622 0 89 56.00000 1.15622 97.9% - 0s H 27 27 45.0000000 3.59306 92.0% 33.5 0s * 47 46 26 39.0000000 3.59306 90.8% 26.4 0s * 85 64 22 34.0000000 4.23940 87.5% 27.4 0s * 1118 449 33 33.0000000 14.17500 57.0% 24.9 1s H 2067 500 32.0000000 18.50000 42.2% 22.7 1s H 3181 619 31.0000000 20.67857 33.3% 21.7 2s 6317 636 29.87097 27 118 31.00000 24.04167 22.4% 19.9 5s Explored 10274 nodes (191726 simplex iterations) in 7.41 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.100000000000e+01, best bound 3.100000000000e+01, gap 0.0%