Build (method = -2) #dp: 7164 Step-3' Graph: 930 vertices and 2783 arcs (0.05s) Step-4' Graph: 708 vertices and 2339 arcs (0.05s) #V4/#V3 = 0.76 #A4/#A3 = 0.84 Ready! (0.05s) Optimize a model with 727 rows, 2340 columns and 5608 nonzeros Presolve removed 191 rows and 359 columns Presolve time: 0.04s Presolved: 536 rows, 1981 columns, 5429 nonzeros Variable types: 0 continuous, 1981 integer (0 binary) Optimize a model with 536 rows, 1981 columns and 5429 nonzeros Presolved: 536 rows, 1981 columns, 5429 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 3.692e+03 Factor NZ : 2.137e+04 (roughly 1 MByte of memory) Factor Ops : 1.430e+06 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 2.93506711e+03 -1.42903209e+05 2.87e+05 1.13e-02 3.64e+02 0s 1 1.12912098e+03 -9.38832589e+04 3.67e+04 2.43e-02 6.33e+01 0s 2 7.45460054e+02 -3.39294621e+04 7.09e+03 1.79e-02 1.49e+01 0s 3 5.70951947e+02 -6.57140759e+03 7.98e+02 6.38e-16 2.35e+00 0s 4 4.65622900e+02 -1.74895398e+03 1.27e+02 9.99e-16 6.23e-01 0s 5 3.95125021e+02 -1.07878959e+03 4.65e+01 5.55e-16 3.91e-01 0s 6 3.77449636e+02 -8.11529930e+02 3.84e+01 4.68e-16 3.14e-01 0s 7 3.32031272e+02 -3.72201376e+02 2.48e+01 3.76e-16 1.85e-01 0s 8 2.84114072e+02 -4.28626072e+01 9.69e+00 2.22e-16 8.47e-02 0s 9 2.45383753e+02 2.95192376e+01 1.88e+00 2.45e-16 5.50e-02 0s 10 2.31524360e+02 1.18435503e+02 8.68e-01 2.67e-16 2.88e-02 0s 11 2.25778023e+02 1.68998788e+02 3.88e-01 3.33e-16 1.44e-02 0s 12 2.23533513e+02 2.13617576e+02 1.32e-01 2.28e-16 2.52e-03 0s 13 2.23021533e+02 2.22975408e+02 1.99e-03 3.67e-16 1.18e-05 0s 14 2.23000022e+02 2.22999975e+02 6.12e-10 2.96e-16 1.18e-08 0s 15 2.23000000e+02 2.23000000e+02 7.91e-10 3.68e-16 1.18e-11 0s 16 2.23000000e+02 2.23000000e+02 1.99e-12 2.52e-16 1.18e-14 0s Barrier solved model in 16 iterations and 0.05 seconds Optimal objective 2.23000000e+02 Root relaxation: objective 2.230000e+02, 1385 iterations, 0.06 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 223.0000000 223.00000 0.0% - 0s Explored 0 nodes (1385 simplex iterations) in 0.16 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 2.230000000000e+02, best bound 2.230000000000e+02, gap 0.0% Preprocessing time: 0.07 seconds Gurobi run time: 0.16 seconds Total run time: 0.23 seconds Objective: 223 Solution: 1 x [1, 2] 12 x [1, 2, 3, 4, 8, 12, 13, 14, 17, 18] 5 x [1, 2, 3, 5, 8, 12, 13, 14, 17, 18] 18 x [1, 2, 3, 6, 7, 8, 18] 5 x [1, 2, 3, 6, 8, 9, 16, 17, 18] 5 x [1, 2, 3, 6, 8, 13, 14, 16, 17, 18] 16 x [1, 2, 3, 6, 8, 16, 17, 18] 5 x [1, 2, 3, 6, 8, 17, 18] 1 x [1, 2, 3, 6, 14, 16, 18, 19] 11 x [1, 2, 3, 7, 8, 12, 13, 17, 18] 4 x [1, 2, 3, 7, 8, 13, 14, 16, 18] 21 x [1, 2, 3, 8, 9, 12, 13, 14, 17, 18] 2 x [1, 2, 3, 8, 10, 12, 13, 14, 16, 17, 18] 22 x [1, 2, 3, 8, 12, 13, 14, 16, 17, 18] 7 x [1, 2, 3, 8, 12, 13, 14, 16, 18] 9 x [1, 2, 3, 8, 12, 13, 14, 17, 18] 5 x [1, 2, 3, 8, 12, 13, 14, 18] 1 x [1, 2, 3, 8, 13, 14, 16, 18] 5 x [1, 2, 3, 18] 5 x [1, 2, 4, 7, 8, 12, 13, 14, 15, 17, 18] 16 x [1, 2, 5, 7, 8, 12, 13, 16, 17, 18] 3 x [1, 2, 6, 8, 13, 17, 18] 2 x [1, 2, 6, 13, 17, 18] 1 x [1, 2, 6, 14] 4 x [1, 2, 6, 14, 16, 18, 19] 1 x [1, 2, 13, 18] 4 x [1, 2, 18] 1 x [1, 2, 18, 19] 3 x [1, 2, 19] 24 x [1, 3, 7, 8, 9, 10, 11, 12, 13, 14, 16, 17, 18] 4 x [1, 4, 6, 18]