Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:30 2012 Optimize a model with 426 rows, 125 columns and 852 nonzeros Presolve removed 102 rows and 5 columns Presolve time: 0.00s Presolved: 324 rows, 120 columns, 698 nonzeros Variable types: 0 continuous, 120 integer (120 binary) Found heuristic solution: objective 38.0000000 Root relaxation: objective 5.200000e+01, 161 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 52.00000 0 94 38.00000 52.00000 36.8% - 0s H 0 0 39.0000000 52.00000 33.3% - 0s 0 0 51.11111 0 113 39.00000 51.11111 31.1% - 0s H 0 0 44.0000000 51.11111 16.2% - 0s 0 0 50.71429 0 113 44.00000 50.71429 15.3% - 0s 0 0 50.39207 0 118 44.00000 50.39207 14.5% - 0s 0 0 50.06475 0 117 44.00000 50.06475 13.8% - 0s H 0 0 45.0000000 50.06475 11.3% - 0s 0 0 49.91658 0 119 45.00000 49.91658 10.9% - 0s 0 0 49.75568 0 118 45.00000 49.75568 10.6% - 0s 0 0 49.69711 0 117 45.00000 49.69711 10.4% - 0s 0 0 49.55465 0 115 45.00000 49.55465 10.1% - 0s 0 0 49.43871 0 119 45.00000 49.43871 9.86% - 0s 0 0 49.34037 0 118 45.00000 49.34037 9.65% - 0s 0 0 49.24669 0 117 45.00000 49.24669 9.44% - 0s 0 0 49.20577 0 118 45.00000 49.20577 9.35% - 0s 0 0 49.17971 0 116 45.00000 49.17971 9.29% - 0s 0 0 49.15012 0 118 45.00000 49.15012 9.22% - 0s 0 0 49.15012 0 118 45.00000 49.15012 9.22% - 0s 0 2 49.14829 0 118 45.00000 49.14829 9.22% - 0s H 21 6 47.0000000 48.85946 3.96% 22.4 0s Cutting planes: Zero half: 70 Explored 33 nodes (1796 simplex iterations) in 0.11 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.700000000000e+01, best bound 4.700000000000e+01, gap 0.0%