Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:39 2012 Optimize a model with 398 rows, 130 columns and 796 nonzeros Presolve removed 70 rows and 6 columns Presolve time: 0.00s Presolved: 328 rows, 124 columns, 687 nonzeros Variable types: 0 continuous, 124 integer (124 binary) Found heuristic solution: objective 47.0000000 Root relaxation: objective 5.900000e+01, 181 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 0 102 47.00000 59.00000 25.5% - 0s 0 0 57.00000 0 104 47.00000 57.00000 21.3% - 0s 0 0 56.00000 0 119 47.00000 56.00000 19.1% - 0s H 0 0 48.0000000 56.00000 16.7% - 0s 0 0 55.60000 0 117 48.00000 55.60000 15.8% - 0s 0 0 55.00000 0 120 48.00000 55.00000 14.6% - 0s H 0 0 49.0000000 55.00000 12.2% - 0s 0 0 54.84058 0 122 49.00000 54.84058 11.9% - 0s H 0 0 50.0000000 54.84058 9.68% - 0s 0 0 54.51220 0 121 50.00000 54.51220 9.02% - 0s 0 0 54.38710 0 120 50.00000 54.38710 8.77% - 0s 0 0 54.31053 0 117 50.00000 54.31053 8.62% - 0s 0 0 54.23007 0 124 50.00000 54.23007 8.46% - 0s H 0 0 52.0000000 54.23007 4.29% - 0s 0 0 54.20427 0 122 52.00000 54.20427 4.24% - 0s 0 0 54.14933 0 123 52.00000 54.14933 4.13% - 0s 0 0 54.14933 0 123 52.00000 54.14933 4.13% - 0s 0 2 54.14008 0 122 52.00000 54.14008 4.12% - 0s Cutting planes: Gomory: 2 Zero half: 67 Explored 19 nodes (1621 simplex iterations) in 0.10 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%