Build (method = -2) #dp: 1926 Step-3' Graph: 97 vertices and 311 arcs (0.01s) Step-4' Graph: 55 vertices and 227 arcs (0.01s) #V4/#V3 = 0.57 #A4/#A3 = 0.73 Ready! (0.01s) Optimize a model with 64 rows, 228 columns and 584 nonzeros Presolve removed 13 rows and 26 columns Presolve time: 0.00s Presolved: 51 rows, 202 columns, 534 nonzeros Variable types: 0 continuous, 202 integer (0 binary) Found heuristic solution: objective 99.0000000 Found heuristic solution: objective 53.0000000 Optimize a model with 51 rows, 202 columns and 534 nonzeros Presolved: 51 rows, 202 columns, 534 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 2.900e+02 Factor NZ : 7.940e+02 Factor Ops : 1.417e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 5.22837948e+02 -2.38082948e+03 2.42e+03 2.22e-16 3.30e+01 0s 1 1.59771645e+02 -1.03941361e+03 4.13e+02 4.44e-16 6.38e+00 0s 2 7.11020131e+01 -2.58968673e+02 2.21e+01 3.33e-16 9.08e-01 0s 3 3.97567113e+01 -3.79751937e+01 4.33e+00 2.45e-16 1.98e-01 0s 4 1.91174671e+01 -1.81386489e+00 1.18e+00 2.91e-16 5.26e-02 0s 5 1.84048725e+01 5.53596238e+00 8.40e-01 1.22e-16 3.23e-02 0s 6 1.56566217e+01 1.13601240e+01 2.80e-01 2.20e-16 1.07e-02 0s 7 1.43718199e+01 1.40800516e+01 2.94e-03 2.22e-16 7.08e-04 0s 8 1.42858056e+01 1.42855101e+01 3.70e-14 2.22e-16 7.16e-07 0s 9 1.42857143e+01 1.42857143e+01 7.08e-14 3.78e-16 7.16e-13 0s Barrier solved model in 9 iterations and 0.00 seconds Optimal objective 1.42857143e+01 Root relaxation: objective 1.428571e+01, 109 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 14.28571 0 14 53.00000 14.28571 73.0% - 0s H 0 0 15.0000000 14.28571 4.76% - 0s Explored 0 nodes (150 simplex iterations) in 0.01 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 1.500000000000e+01, best bound 1.500000000000e+01, gap 0.0% Preprocessing time: 0.02 seconds Gurobi run time: 0.01 seconds Total run time: 0.02 seconds Objective: 15 Solution: 2 x [2, 3, 4, 5, 6, 6, 9] 6 x [1, 3, 4, 5, 6, 7, 9] 4 x [1, 3, 4, 6, 6, 8, 9] 1 x [1, 2, 4, 4, 6, 6, 9] 1 x [3, 4, 6, 8, 8] 1 x [1, 3, 3, 8]