Build (method = -2) #dp: 9493 Step-3' Graph: 303 vertices and 3929 arcs (0.08s) Step-4' Graph: 221 vertices and 3676 arcs (0.09s) #V4/#V3 = 0.73 #A4/#A3 = 0.94 Ready! (0.09s) Optimize a model with 266 rows, 3677 columns and 10595 nonzeros Presolve removed 7 rows and 10 columns Presolve time: 0.06s Presolved: 259 rows, 3667 columns, 10581 nonzeros Variable types: 0 continuous, 3667 integer (299 binary) Found heuristic solution: objective 90.0000000 Found heuristic solution: objective 84.0000000 Optimize a model with 259 rows, 3667 columns and 10581 nonzeros Presolved: 259 rows, 3667 columns, 10581 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 5.973e+03 Factor NZ : 1.468e+04 (roughly 2 MBytes of memory) Factor Ops : 1.086e+06 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 6.76716453e+03 -8.37552150e+04 4.46e+04 1.72e-01 1.15e+02 0s 1 2.02703308e+03 -2.01644636e+04 7.81e+03 9.99e-16 2.01e+01 0s 2 4.60235017e+02 -8.71528519e+03 7.65e+02 3.11e-15 2.77e+00 0s 3 2.33821015e+02 -2.55388514e+03 1.73e+02 2.18e-14 6.36e-01 0s 4 1.20181492e+02 -4.83511884e+02 1.14e+01 6.66e-15 9.30e-02 0s 5 1.13970504e+02 -2.57891090e+02 5.42e+00 3.55e-15 5.40e-02 0s 6 1.07620977e+02 -1.62068209e+02 3.34e+00 2.55e-15 3.83e-02 0s 7 1.05038467e+02 -1.57069227e+02 3.12e+00 2.44e-15 3.71e-02 0s 8 8.39271874e+01 -7.60792922e+01 2.41e+00 1.11e-15 2.27e-02 0s 9 5.79014980e+01 -3.74822500e+01 1.38e+00 6.66e-16 1.35e-02 0s 10 3.90144545e+01 -2.00498739e+01 8.22e-01 3.74e-16 8.29e-03 0s 11 2.83928517e+01 -7.46385466e+00 4.65e-01 4.41e-16 5.00e-03 0s 12 2.63315857e+01 -5.07425277e+00 2.99e-01 4.35e-16 4.34e-03 0s 13 2.51901279e+01 -5.97230695e-01 1.84e-01 4.90e-16 3.54e-03 0s 14 2.36171424e+01 1.47041589e+01 6.76e-02 3.60e-16 1.22e-03 0s 15 2.22268527e+01 1.85779497e+01 1.84e-02 3.55e-16 4.96e-04 0s 16 2.16781765e+01 2.04099797e+01 3.06e-03 3.59e-16 1.72e-04 0s 17 2.15442204e+01 2.08430678e+01 1.65e-03 3.42e-16 9.52e-05 0s 18 2.13739219e+01 2.11864113e+01 1.62e-04 3.33e-16 2.54e-05 0s 19 2.13337492e+01 2.13143422e+01 1.65e-06 3.33e-16 2.63e-06 0s 20 2.13306867e+01 2.13287127e+01 1.93e-08 3.37e-16 2.68e-07 0s 21 2.13306123e+01 2.13306095e+01 1.58e-12 4.02e-16 3.76e-10 0s 22 2.13306122e+01 2.13306122e+01 8.44e-14 4.00e-16 9.35e-16 0s Barrier solved model in 22 iterations and 0.07 seconds Optimal objective 2.13306122e+01 Root relaxation: objective 2.133061e+01, 1401 iterations, 0.08 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 21.33061 0 73 84.00000 21.33061 74.6% - 0s H 0 0 23.0000000 21.33061 7.26% - 0s H 0 0 22.0000000 21.33061 3.04% - 0s Explored 0 nodes (2633 simplex iterations) in 0.48 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 2.200000000000e+01, best bound 2.200000000000e+01, gap 0.0% Preprocessing time: 0.11 seconds Gurobi run time: 0.48 seconds Total run time: 0.59 seconds Objective: 22 Solution: 1 x [30, 32, 36, 39, 45] 1 x [31, 32, 36, 42, 44] 1 x [2, 13, 16, 19, 44] 2 x [32, 36, 38, 40, 43] 1 x [28, 32, 35, 39, 43] 2 x [33, 34, 37, 40, 41] 1 x [31, 34, 35, 38, 39] 2 x [1, 5, 15, 16, 29, 30] 1 x [3, 11, 12, 12, 30, 30] 1 x [3, 6, 7, 23, 28, 28] 1 x [3, 8, 18, 28, 28] 1 x [2, 10, 23, 25, 27] 1 x [4, 11, 14, 17, 25, 27] 1 x [2, 8, 10, 25, 26, 26] 1 x [9, 14, 17, 17, 18, 25] 1 x [9, 12, 14, 20, 21, 24] 1 x [5, 7, 20, 21, 21, 24] 1 x [9, 14, 17, 18, 20, 22] 1 x [1, 16, 18, 19, 19]