Build (method = -2) #dp: 184 Step-3' Graph: 48 vertices and 137 arcs (0.00s) Step-4' Graph: 18 vertices and 77 arcs (0.00s) #V4/#V3 = 0.38 #A4/#A3 = 0.56 Ready! (0.00s) Optimize a model with 36 rows, 78 columns and 202 nonzeros Presolve removed 11 rows and 16 columns Presolve time: 0.00s Presolved: 25 rows, 62 columns, 162 nonzeros Variable types: 0 continuous, 62 integer (0 binary) Found heuristic solution: objective 138.0000000 Optimize a model with 25 rows, 62 columns and 162 nonzeros Presolved: 25 rows, 62 columns, 162 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 7.900e+01 Factor NZ : 2.340e+02 Factor Ops : 2.704e+03 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 7.23056879e+02 -1.05334456e+03 1.08e+03 2.22e-16 3.99e+01 0s 1 2.60551330e+02 -3.60656638e+02 1.15e+02 3.33e-16 6.64e+00 0s 2 1.33877688e+02 -4.14736127e+01 2.94e+00 7.88e-15 1.33e+00 0s 3 1.01128961e+02 4.56300859e+01 4.03e-02 2.00e-15 4.14e-01 0s 4 9.13861036e+01 8.66509524e+01 2.95e-03 2.22e-16 3.53e-02 0s 5 9.00882960e+01 8.97910453e+01 4.07e-04 1.22e-16 2.22e-03 0s 6 9.00010240e+01 8.99993548e+01 6.34e-13 2.22e-16 1.25e-05 0s 7 9.00000000e+01 9.00000000e+01 1.13e-12 2.22e-16 1.64e-11 0s Barrier solved model in 7 iterations and 0.00 seconds Optimal objective 9.00000000e+01 Root relaxation: objective 9.000000e+01, 26 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 90.0000000 90.00000 0.0% - 0s Explored 0 nodes (26 simplex iterations) in 0.00 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 9.000000000000e+01, best bound 9.000000000000e+01, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.00 seconds Total run time: 0.01 seconds Objective: 90 Solution: 2 x [1] 1 x [2] 2 x [3, 18] 10 x [4, 16] 5 x [5, 13] 14 x [6, 12] 1 x [6, 13] 3 x [6, 14] 9 x [7, 8] 3 x [7, 9] 1 x [7, 13] 1 x [7, 17, 18] 7 x [8, 9] 9 x [10, 13] 6 x [11, 16, 18] 12 x [13, 15, 17] 4 x [13, 16, 17]