Build (method = -2) #dp: 138 Step-3' Graph: 30 vertices and 83 arcs (0.00s) Step-4' Graph: 12 vertices and 47 arcs (0.00s) #V4/#V3 = 0.40 #A4/#A3 = 0.57 Ready! (0.00s) Optimize a model with 32 rows, 48 columns and 124 nonzeros Presolve removed 17 rows and 18 columns Presolve time: 0.00s Presolved: 15 rows, 30 columns, 73 nonzeros Variable types: 0 continuous, 30 integer (0 binary) Found heuristic solution: objective 1577.0000000 Found heuristic solution: objective 1227.0000000 Optimize a model with 15 rows, 30 columns and 73 nonzeros Presolved: 15 rows, 30 columns, 73 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 3.800e+01 Factor NZ : 1.200e+02 Factor Ops : 1.240e+03 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 2.93300731e+03 -3.30829439e+03 2.77e+03 1.11e-16 2.50e+02 0s 1 1.53784060e+03 -9.19694184e+00 1.47e+02 4.44e-16 2.89e+01 0s 2 1.36639983e+03 6.47644002e+02 6.12e+00 6.66e-16 1.12e+01 0s 3 1.28231648e+03 1.11587360e+03 1.74e-01 3.33e-16 2.56e+00 0s 4 1.21320131e+03 1.18366002e+03 1.53e-02 2.22e-16 4.55e-01 0s 5 1.20171347e+03 1.20070452e+03 6.56e-05 1.11e-16 1.55e-02 0s 6 1.20150000e+03 1.20149999e+03 5.17e-09 2.22e-16 2.91e-07 0s 7 1.20150000e+03 1.20150000e+03 5.68e-14 2.22e-16 2.92e-13 0s Barrier solved model in 7 iterations and 0.00 seconds Optimal objective 1.20150000e+03 Root relaxation: objective 1.201500e+03, 13 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 1201.50000 0 3 1227.00000 1201.50000 2.08% - 0s H 0 0 1202.0000000 1201.50000 0.04% - 0s Explored 0 nodes (17 simplex iterations) in 0.00 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 1.202000000000e+03, best bound 1.202000000000e+03, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.00 seconds Total run time: 0.01 seconds Objective: 1202 Solution: 37 x [1] 22 x [2, 20] 129 x [3, 19] 117 x [4, 20] 35 x [5, 19] 96 x [6, 18] 18 x [6, 20] 141 x [7] 111 x [8, 17] 7 x [9] 2 x [9, 17] 1 x [9, 19] 4 x [9, 20] 44 x [10] 174 x [11] 44 x [12, 17] 124 x [13, 15] 1 x [14] 2 x [14, 15] 67 x [14, 16] 26 x [15, 16]