Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:41:58 2012 Optimize a model with 307 rows, 327 columns and 1092 nonzeros Presolve removed 0 rows and 28 columns Presolve time: 0.00s Presolved: 307 rows, 299 columns, 1064 nonzeros Variable types: 0 continuous, 299 integer (298 binary) Found heuristic solution: objective 48.0000000 Root relaxation: objective 0.000000e+00, 203 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 0 118 48.00000 0.00000 100% - 0s H 0 0 40.0000000 0.00000 100% - 0s H 0 0 33.0000000 0.00000 100% - 0s H 0 0 30.0000000 0.00000 100% - 0s 0 0 0.07743 0 119 30.00000 0.07743 100% - 0s H 0 0 26.0000000 0.07743 100% - 0s H 0 0 18.0000000 0.07743 100% - 0s 0 0 1.00000 0 124 18.00000 1.00000 94.4% - 0s H 0 0 10.0000000 1.00000 90.0% - 0s 0 0 1.00000 0 122 10.00000 1.00000 90.0% - 0s H 0 0 9.0000000 1.00000 88.9% - 0s 0 0 1.00000 0 123 9.00000 1.00000 88.9% - 0s 0 0 1.00000 0 118 9.00000 1.00000 88.9% - 0s 0 2 1.00000 0 118 9.00000 1.00000 88.9% - 0s * 10 10 6 8.0000000 1.40909 82.4% 77.8 0s * 15 10 10 7.0000000 1.40909 79.9% 57.5 0s H 27 10 6.0000000 1.50000 75.0% 36.3 0s * 38 8 7 5.0000000 2.26042 54.8% 35.9 0s * 51 4 8 4.0000000 2.48837 37.8% 29.6 0s Cutting planes: Gomory: 1 Explored 56 nodes (2642 simplex iterations) in 0.12 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.000000000000e+00, best bound 4.000000000000e+00, gap 0.0%