Build (method = -2) #dp: 278 Step-3' Graph: 36 vertices and 159 arcs (0.00s) Step-4' Graph: 20 vertices and 127 arcs (0.00s) #V4/#V3 = 0.56 #A4/#A3 = 0.80 Ready! (0.00s) Optimize a model with 40 rows, 128 columns and 351 nonzeros Presolve removed 11 rows and 13 columns Presolve time: 0.00s Presolved: 29 rows, 115 columns, 316 nonzeros Variable types: 0 continuous, 115 integer (0 binary) Found heuristic solution: objective 181.0000000 Found heuristic solution: objective 176.0000000 Optimize a model with 29 rows, 115 columns and 316 nonzeros Presolved: 29 rows, 115 columns, 316 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 1.490e+02 Factor NZ : 3.630e+02 Factor Ops : 5.531e+03 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 7.98660139e+02 -1.40033737e+03 2.56e+03 2.22e-16 3.49e+01 0s 1 2.64117027e+02 -4.82988599e+02 2.31e+02 2.33e-15 4.86e+00 0s 2 1.52975301e+02 -1.02733951e+02 1.47e+00 1.55e-15 1.07e+00 0s 3 1.14948458e+02 5.61194991e+01 3.79e-02 9.58e-16 2.44e-01 0s 4 9.63741271e+01 8.68481632e+01 3.41e-03 1.12e-15 3.95e-02 0s 5 9.46493887e+01 9.13590652e+01 9.81e-04 8.37e-16 1.37e-02 0s 6 9.39819748e+01 9.30686232e+01 2.04e-04 9.99e-16 3.79e-03 0s 7 9.37274344e+01 9.35956178e+01 2.50e-05 5.78e-16 5.47e-04 0s 8 9.36875549e+01 9.36873588e+01 8.53e-14 7.23e-16 8.14e-07 0s 9 9.36875000e+01 9.36875000e+01 4.26e-14 8.88e-16 8.31e-13 0s Barrier solved model in 9 iterations and 0.00 seconds Optimal objective 9.36875000e+01 Root relaxation: objective 9.368750e+01, 29 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 93.68750 0 12 176.00000 93.68750 46.8% - 0s H 0 0 95.0000000 93.68750 1.38% - 0s H 0 0 94.0000000 93.68750 0.33% - 0s Explored 0 nodes (43 simplex iterations) in 0.01 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 9.400000000000e+01, best bound 9.400000000000e+01, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.01 seconds Total run time: 0.01 seconds Objective: 94 Solution: 2 x [8, 20] 3 x [2, 20] 13 x [4, 7] 4 x [3, 7] 9 x [3, 17] 3 x [6, 11] 1 x [5, 5, 6] 11 x [1, 12] 5 x [11, 12] 2 x [12, 16, 16] 12 x [10, 15] 1 x [1, 10] 1 x [10, 18] 2 x [10, 18, 18] 1 x [10, 16, 16] 12 x [9, 19] 6 x [13, 14] 1 x [14, 15] 2 x [14, 20, 20] 2 x [11, 11, 20] 1 x [5, 5, 17, 20]