Gurobi 5.0.1 (linux64) logging started Sat Nov 17 19:57:00 2012 Optimize a model with 271 rows, 159 columns and 834 nonzeros Presolve time: 0.00s Presolved: 271 rows, 159 columns, 834 nonzeros Variable types: 0 continuous, 159 integer (159 binary) Found heuristic solution: objective 74.0000000 Found heuristic solution: objective 68.0000000 Root relaxation: objective 0.000000e+00, 52 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 24 68.00000 0.00000 100% - 0s H 0 0 67.0000000 0.00000 100% - 0s 0 0 0.93916 0 34 67.00000 0.93916 98.6% - 0s H 0 0 65.0000000 0.93916 98.6% - 0s H 0 0 64.0000000 0.93916 98.5% - 0s 0 0 1.05051 0 45 64.00000 1.05051 98.4% - 0s 0 0 1.11111 0 26 64.00000 1.11111 98.3% - 0s 0 0 1.11111 0 26 64.00000 1.11111 98.3% - 0s 0 0 1.16667 0 26 64.00000 1.16667 98.2% - 0s 0 0 1.16667 0 26 64.00000 1.16667 98.2% - 0s 0 0 1.16667 0 26 64.00000 1.16667 98.2% - 0s 0 0 1.16667 0 26 64.00000 1.16667 98.2% - 0s H 0 0 60.0000000 1.16667 98.1% - 0s 0 2 1.50617 0 26 60.00000 1.50617 97.5% - 0s * 125 71 17 59.0000000 11.84795 79.9% 25.8 0s * 166 92 16 57.0000000 17.17460 69.9% 25.0 0s * 207 111 17 56.0000000 18.09722 67.7% 24.6 0s * 447 182 16 55.0000000 25.82828 53.0% 23.0 0s * 591 213 17 54.0000000 27.45679 49.2% 22.0 0s * 2059 183 27 53.0000000 38.06667 28.2% 21.1 1s Cutting planes: Gomory: 1 Mod-K: 5 Explored 3290 nodes (65224 simplex iterations) in 1.97 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.300000000000e+01, best bound 5.300000000000e+01, gap 0.0%