Gurobi 5.0.1 (linux64) logging started Sun Nov 18 00:54:49 2012 Optimize a model with 323 rows, 215 columns and 1020 nonzeros Presolve time: 0.00s Presolved: 323 rows, 215 columns, 1020 nonzeros Variable types: 0 continuous, 215 integer (215 binary) Found heuristic solution: objective 77.0000000 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 54 77.00000 0.00000 100% - 0s H 0 0 64.0000000 0.00000 100% - 0s 0 0 0.69565 0 56 64.00000 0.69565 98.9% - 0s 0 0 1.00000 0 56 64.00000 1.00000 98.4% - 0s 0 0 1.00000 0 56 64.00000 1.00000 98.4% - 0s 0 0 1.00000 0 56 64.00000 1.00000 98.4% - 0s 0 0 1.00000 0 56 64.00000 1.00000 98.4% - 0s H 0 0 57.0000000 1.00000 98.2% - 0s 0 2 1.00000 0 56 57.00000 1.00000 98.2% - 0s * 41 40 25 47.0000000 3.65217 92.2% 28.0 0s * 79 65 24 46.0000000 3.73913 91.9% 25.1 0s * 241 182 24 44.0000000 11.51473 73.8% 23.7 0s * 506 300 16 43.0000000 15.74858 63.4% 21.5 0s * 515 280 19 41.0000000 15.74858 61.6% 21.3 0s * 579 283 15 40.0000000 15.91304 60.2% 21.2 0s * 959 365 24 39.0000000 17.13913 56.1% 22.3 0s * 2155 312 22 38.0000000 24.33333 36.0% 21.4 1s H 2487 288 37.0000000 26.59259 28.1% 21.1 2s Cutting planes: Gomory: 1 Zero half: 3 Explored 3895 nodes (78579 simplex iterations) in 3.16 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.700000000000e+01, best bound 3.700000000000e+01, gap 0.0%