Gurobi 5.0.1 (linux64) logging started Sun Nov 18 04:39:40 2012 Optimize a model with 443 rows, 315 columns and 1420 nonzeros Presolve time: 0.00s Presolved: 443 rows, 315 columns, 1420 nonzeros Variable types: 0 continuous, 315 integer (315 binary) Found heuristic solution: objective 93.0000000 Root relaxation: objective 0.000000e+00, 142 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 94 93.00000 0.00000 100% - 0s H 0 0 65.0000000 0.00000 100% - 0s 0 0 0.66667 0 98 65.00000 0.66667 99.0% - 0s H 0 0 62.0000000 0.66667 98.9% - 0s 0 0 0.70631 0 98 62.00000 0.70631 98.9% - 0s 0 0 0.77458 0 98 62.00000 0.77458 98.8% - 0s 0 0 0.77458 0 98 62.00000 0.77458 98.8% - 0s 0 0 0.77458 0 98 62.00000 0.77458 98.8% - 0s 0 2 0.77458 0 98 62.00000 0.77458 98.8% - 0s * 47 44 28 56.0000000 4.02128 92.8% 30.7 0s H 135 103 49.0000000 6.49519 86.7% 27.4 0s * 196 141 25 46.0000000 6.62338 85.6% 27.8 0s * 428 284 22 45.0000000 11.37931 74.7% 28.6 0s * 454 287 19 44.0000000 11.47674 73.9% 28.0 0s * 872 401 32 43.0000000 14.65823 65.9% 29.0 1s * 1937 463 28 42.0000000 23.00000 45.2% 26.1 2s * 3627 694 25 41.0000000 25.71429 37.3% 24.4 4s 3731 707 39.22222 21 133 41.00000 26.02703 36.5% 24.3 5s 8631 873 cutoff 24 41.00000 30.85185 24.8% 22.3 10s 14730 220 cutoff 23 41.00000 35.88889 12.5% 21.2 15s Cutting planes: Gomory: 1 Zero half: 3 Explored 15192 nodes (320403 simplex iterations) in 15.32 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%