Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:52 2012 Optimize a model with 419 rows, 134 columns and 838 nonzeros Presolve removed 94 rows and 7 columns Presolve time: 0.00s Presolved: 325 rows, 127 columns, 687 nonzeros Variable types: 0 continuous, 127 integer (127 binary) Found heuristic solution: objective 45.0000000 Root relaxation: objective 5.900000e+01, 175 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 59.00000 0 104 45.00000 59.00000 31.1% - 0s H 0 0 46.0000000 59.00000 28.3% - 0s 0 0 57.16667 0 119 46.00000 57.16667 24.3% - 0s H 0 0 49.0000000 57.16667 16.7% - 0s 0 0 56.50000 0 99 49.00000 56.50000 15.3% - 0s 0 0 56.11111 0 121 49.00000 56.11111 14.5% - 0s H 0 0 50.0000000 56.11111 12.2% - 0s 0 0 55.62857 0 118 50.00000 55.62857 11.3% - 0s 0 0 55.20000 0 123 50.00000 55.20000 10.4% - 0s 0 0 54.97143 0 124 50.00000 54.97143 9.94% - 0s 0 0 54.80000 0 120 50.00000 54.80000 9.60% - 0s 0 0 54.71795 0 124 50.00000 54.71795 9.44% - 0s 0 0 54.65871 0 125 50.00000 54.65871 9.32% - 0s 0 0 54.56616 0 124 50.00000 54.56616 9.13% - 0s 0 0 54.43103 0 123 50.00000 54.43103 8.86% - 0s 0 0 54.36435 0 121 50.00000 54.36435 8.73% - 0s 0 0 54.35471 0 122 50.00000 54.35471 8.71% - 0s 0 0 54.35471 0 122 50.00000 54.35471 8.71% - 0s 0 2 54.35253 0 122 50.00000 54.35253 8.71% - 0s H 5 5 51.0000000 54.17593 6.23% 45.4 0s * 7 3 3 52.0000000 54.17593 4.18% 36.6 0s Cutting planes: Gomory: 1 Zero half: 88 Explored 23 nodes (1799 simplex iterations) in 0.11 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.200000000000e+01, best bound 5.200000000000e+01, gap 0.0%