Build (method = -2) #dp: 135 Step-3' Graph: 28 vertices and 77 arcs (0.00s) Step-4' Graph: 11 vertices and 43 arcs (0.00s) #V4/#V3 = 0.39 #A4/#A3 = 0.56 Ready! (0.00s) Optimize a model with 31 rows, 44 columns and 114 nonzeros Presolve removed 18 rows and 21 columns Presolve time: 0.00s Presolved: 13 rows, 23 columns, 55 nonzeros Variable types: 0 continuous, 23 integer (0 binary) Found heuristic solution: objective 180.0000000 Found heuristic solution: objective 120.0000000 Optimize a model with 13 rows, 23 columns and 55 nonzeros Presolve removed 1 rows and 2 columns Presolved: 12 rows, 21 columns, 51 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 2.500e+01 Factor NZ : 7.800e+01 Factor Ops : 6.500e+02 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 1.88397635e+02 -1.21609281e+01 5.92e+01 2.22e-16 9.16e+00 0s 1 1.32012015e+02 8.68521438e+01 7.70e-01 2.22e-16 9.74e-01 0s 2 1.25305610e+02 1.04287764e+02 3.33e-02 8.88e-16 4.39e-01 0s 3 1.20012189e+02 1.17189488e+02 3.55e-15 1.11e-16 5.88e-02 0s 4 1.18028359e+02 1.17974306e+02 1.73e-14 4.44e-16 1.13e-03 0s 5 1.18000001e+02 1.18000000e+02 2.45e-15 1.11e-16 1.99e-08 0s 6 1.18000000e+02 1.18000000e+02 3.55e-15 1.11e-16 2.00e-14 0s Barrier solved model in 6 iterations and 0.00 seconds Optimal objective 1.18000000e+02 Root relaxation: objective 1.180000e+02, 9 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 118.0000000 118.00000 0.0% - 0s Explored 0 nodes (9 simplex iterations) in 0.00 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 1.180000000000e+02, best bound 1.180000000000e+02, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.00 seconds Total run time: 0.01 seconds Objective: 118 Solution: 9 x [1] 17 x [2] 1 x [3] 9 x [4] 6 x [4, 20] 7 x [5, 19] 1 x [6, 19] 3 x [7, 18] 3 x [8, 16] 5 x [8, 17] 3 x [8, 19] 15 x [9, 16] 4 x [10, 15] 3 x [11, 14] 3 x [11, 15] 15 x [12, 14] 12 x [13, 15] 2 x [14, 15]