Build (method = -2) #dp: 6935 Step-3' Graph: 271 vertices and 802 arcs (0.06s) Step-4' Graph: 76 vertices and 412 arcs (0.06s) #V4/#V3 = 0.28 #A4/#A3 = 0.51 Ready! (0.06s) Optimize a model with 117 rows, 413 columns and 1095 nonzeros Presolve removed 24 rows and 44 columns Presolve time: 0.01s Presolved: 93 rows, 369 columns, 1008 nonzeros Variable types: 0 continuous, 369 integer (66 binary) Found heuristic solution: objective 79.0000000 Found heuristic solution: objective 53.0000000 Optimize a model with 93 rows, 369 columns and 1008 nonzeros Presolved: 93 rows, 369 columns, 1008 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 4.470e+02 Factor NZ : 9.270e+02 Factor Ops : 1.248e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 3.88276232e+02 -7.73662051e+02 3.57e+02 9.30e-02 5.46e+00 0s 1 7.96551179e+01 -3.89504927e+02 1.67e+01 3.89e-16 7.65e-01 0s 2 3.90595149e+01 -2.73111414e+01 5.69e-03 4.44e-16 8.76e-02 0s 3 2.09274172e+01 1.41189202e+01 4.55e-04 5.55e-16 8.91e-03 0s 4 2.00304436e+01 1.99485284e+01 1.24e-13 3.33e-16 1.07e-04 0s 5 2.00000001e+01 1.99999995e+01 4.92e-14 3.99e-16 8.13e-10 0s 6 2.00000000e+01 2.00000000e+01 4.99e-14 3.33e-16 8.79e-16 0s Barrier solved model in 6 iterations and 0.00 seconds Optimal objective 2.00000000e+01 Root relaxation: objective 2.000000e+01, 257 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 20.0000000 20.00000 0.0% - 0s Explored 0 nodes (280 simplex iterations) in 0.02 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 2.000000000000e+01, best bound 2.000000000000e+01, gap 0.0% Preprocessing time: 0.08 seconds Gurobi run time: 0.02 seconds Total run time: 0.10 seconds Objective: 20 Solution: 1 x [19, 24, 31, 39, 41] 1 x [15, 32, 32, 36, 40] 4 x [7, 13, 30, 33, 39] 2 x [2, 6, 14, 34, 38] 3 x [1, 2, 12, 20, 37] 1 x [17, 21, 21, 31, 35] 3 x [9, 16, 25, 27, 31] 1 x [8, 12, 18, 23, 31] 1 x [4, 5, 12, 15, 29] 1 x [1, 6, 10, 26, 28] 1 x [1, 3, 26, 26, 28] 1 x [2, 5, 11, 17, 22]