Build (method = -2) #dp: 206 Step-3' Graph: 34 vertices and 100 arcs (0.00s) Step-4' Graph: 32 vertices and 96 arcs (0.00s) #V4/#V3 = 0.94 #A4/#A3 = 0.96 Ready! (0.00s) Optimize a model with 42 rows, 97 columns and 243 nonzeros Presolve removed 14 rows and 26 columns Presolve time: 0.00s Presolved: 28 rows, 71 columns, 181 nonzeros Variable types: 0 continuous, 71 integer (0 binary) Found heuristic solution: objective 72.0000000 Found heuristic solution: objective 71.0000000 Optimize a model with 28 rows, 71 columns and 181 nonzeros Presolved: 28 rows, 71 columns, 181 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 1.140e+02 Factor NZ : 2.880e+02 Factor Ops : 3.510e+03 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 1.72618674e+02 -9.04254167e+02 4.16e+02 1.11e-16 2.43e+01 0s 1 9.59363479e+01 -4.30189076e+02 3.61e+01 3.33e-16 4.65e+00 0s 2 7.25216948e+01 -4.71057993e+01 6.33e-02 8.66e-15 8.26e-01 0s 3 5.75979911e+01 3.33200341e+01 1.33e-03 1.78e-15 1.67e-01 0s 4 5.46656881e+01 4.96611663e+01 3.08e-04 2.22e-16 3.44e-02 0s 5 5.41609918e+01 5.38637093e+01 9.53e-05 1.11e-16 2.04e-03 0s 6 5.40009055e+01 5.39979241e+01 3.50e-07 1.51e-16 2.04e-05 0s 7 5.40000000e+01 5.40000000e+01 1.02e-12 3.33e-16 6.06e-11 0s Barrier solved model in 7 iterations and 0.00 seconds Optimal objective 5.40000000e+01 Root relaxation: objective 5.400000e+01, 42 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 54.0000000 54.00000 0.0% - 0s Explored 0 nodes (42 simplex iterations) in 0.01 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 5.400000000000e+01, best bound 5.400000000000e+01, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.01 seconds Total run time: 0.02 seconds Objective: 54 Solution: 11 x [5, 7] 9 x [3] 5 x [9] 6 x [8] 1 x [7, 8] 1 x [6, 6, 6, 7, 8] 2 x [6, 6, 6, 6, 6, 7, 8] 14 x [1, 10] 1 x [2] 2 x [2, 4] 2 x [1, 2]