Build (method = -2) #dp: 8093 Step-3' Graph: 312 vertices and 3782 arcs (0.05s) Step-4' Graph: 206 vertices and 3469 arcs (0.06s) #V4/#V3 = 0.66 #A4/#A3 = 0.92 Ready! (0.06s) Optimize a model with 250 rows, 3470 columns and 10003 nonzeros Presolve removed 7 rows and 8 columns Presolve time: 0.05s Presolved: 243 rows, 3462 columns, 10012 nonzeros Variable types: 0 continuous, 3462 integer (1041 binary) Found heuristic solution: objective 68.0000000 Optimize a model with 243 rows, 3462 columns and 10012 nonzeros Presolved: 243 rows, 3462 columns, 10012 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 5.601e+03 Factor NZ : 1.342e+04 (roughly 2 MBytes of memory) Factor Ops : 9.656e+05 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 4.61932834e+03 -3.84058908e+04 4.45e+04 1.78e-01 6.51e+01 0s 1 1.58506572e+03 -1.12837868e+04 8.78e+03 7.77e-16 1.30e+01 0s 2 4.36246100e+02 -4.70396129e+03 1.24e+03 6.66e-16 2.22e+00 0s 3 2.53698241e+02 -1.54307450e+03 2.11e+02 8.88e-16 4.52e-01 0s 4 1.45096927e+02 -3.48989304e+02 3.12e+01 8.88e-16 9.17e-02 0s 5 1.02570929e+02 -1.66333925e+02 1.79e+01 4.44e-16 4.82e-02 0s 6 8.48354260e+01 -1.39364390e+02 1.31e+01 4.44e-16 3.89e-02 0s 7 8.40865849e+01 -1.31492223e+02 1.29e+01 4.75e-16 3.75e-02 0s 8 7.17420078e+01 -6.04621460e+01 1.08e+01 2.41e-16 2.37e-02 0s 9 3.26844023e+01 -2.46891216e+01 2.92e+00 2.98e-16 9.38e-03 0s 10 2.48325770e+01 -9.51620935e+00 1.60e+00 4.44e-16 5.43e-03 0s 11 2.29216335e+01 3.70168926e+00 1.08e+00 2.22e-16 2.99e-03 0s 12 2.23925743e+01 8.12651345e+00 7.78e-01 2.22e-16 2.18e-03 0s 13 2.14066092e+01 1.24214182e+01 5.42e-01 2.22e-16 1.36e-03 0s 14 1.95684086e+01 1.50903840e+01 2.48e-01 2.22e-16 6.65e-04 0s 15 1.88484490e+01 1.66143995e+01 1.41e-01 2.22e-16 3.30e-04 0s 16 1.81664654e+01 1.73755352e+01 3.29e-02 2.22e-16 1.16e-04 0s 17 1.78831931e+01 1.77296111e+01 1.35e-03 4.44e-16 2.22e-05 0s 18 1.78464573e+01 1.78127769e+01 2.55e-04 4.44e-16 4.86e-06 0s 19 1.78356799e+01 1.78341757e+01 9.17e-06 4.44e-16 2.17e-07 0s 20 1.78351101e+01 1.78349673e+01 1.64e-06 3.00e-16 2.06e-08 0s 21 1.78350008e+01 1.78349994e+01 1.68e-10 4.44e-16 1.98e-10 0s 22 1.78350000e+01 1.78350000e+01 8.23e-12 4.44e-16 2.60e-15 0s Barrier solved model in 22 iterations and 0.06 seconds Optimal objective 1.78350000e+01 Root relaxation: objective 1.783500e+01, 1262 iterations, 0.08 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 17.83500 0 46 68.00000 17.83500 73.8% - 0s H 0 0 19.0000000 17.83500 6.13% - 0s H 0 0 18.0000000 17.83500 0.92% - 0s Explored 0 nodes (2628 simplex iterations) in 0.36 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 1.800000000000e+01, best bound 1.800000000000e+01, gap 0.0% Preprocessing time: 0.07 seconds Gurobi run time: 0.36 seconds Total run time: 0.43 seconds Objective: 18 Solution: 2 x [33, 35, 41, 43, 44] 2 x [29, 37, 38, 39, 43] 1 x [35, 36, 37, 39, 42] 1 x [31, 32, 34, 36, 41] 1 x [29, 30, 32, 35, 40] 1 x [8, 14, 14, 14, 15, 28] 1 x [6, 7, 25, 28, 28] 1 x [3, 7, 13, 19, 23, 27] 1 x [4, 12, 13, 14, 23, 27] 1 x [3, 8, 13, 18, 24, 26] 1 x [1, 1, 11, 13, 26, 26] 1 x [4, 9, 10, 20, 24, 25] 1 x [6, 6, 10, 21, 23, 25] 1 x [4, 8, 13, 17, 25, 25] 1 x [2, 5, 21, 21, 21, 22] 1 x [14, 15, 15, 16, 16, 17]