Build (method = -2) #dp: 2357 Step-3' Graph: 114 vertices and 1263 arcs (0.01s) Step-4' Graph: 111 vertices and 1257 arcs (0.01s) #V4/#V3 = 0.97 #A4/#A3 = 1.00 Ready! (0.01s) Optimize a model with 149 rows, 1258 columns and 3557 nonzeros Presolve removed 22 rows and 24 columns Presolve time: 0.03s Presolved: 127 rows, 1234 columns, 3536 nonzeros Variable types: 0 continuous, 1234 integer (848 binary) Found heuristic solution: objective 27.0000000 Found heuristic solution: objective 25.0000000 Optimize a model with 127 rows, 1234 columns and 3536 nonzeros Presolved: 127 rows, 1234 columns, 3536 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 2.459e+03 Factor NZ : 5.462e+03 Factor Ops : 3.216e+05 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 1.84092062e+03 -3.75599381e+03 2.05e+03 1.50e-01 1.15e+01 0s 1 4.62033932e+02 -1.34657139e+03 4.02e+02 5.55e-16 2.41e+00 0s 2 9.60149251e+01 -3.37957325e+02 3.62e+01 1.33e-15 3.08e-01 0s 3 3.59191019e+01 -2.93544531e+01 2.92e+00 3.89e-16 3.46e-02 0s 4 2.47651166e+01 3.09044343e+00 2.99e-01 3.33e-16 9.16e-03 0s 5 2.17389267e+01 9.50463801e+00 1.40e-01 3.33e-16 5.05e-03 0s 6 1.89514864e+01 1.23194083e+01 6.27e-02 1.29e-16 2.71e-03 0s 7 1.77849591e+01 1.38478913e+01 3.13e-02 1.33e-16 1.60e-03 0s 8 1.75304642e+01 1.47345077e+01 2.09e-02 1.80e-16 1.13e-03 0s 9 1.67909707e+01 1.59619288e+01 1.77e-03 2.22e-16 3.35e-04 0s 10 1.67052941e+01 1.62515658e+01 1.11e-03 2.22e-16 1.83e-04 0s 11 1.66293824e+01 1.63436228e+01 4.71e-04 1.48e-16 1.15e-04 0s 12 1.65819132e+01 1.64449937e+01 2.15e-04 1.85e-16 5.53e-05 0s 13 1.65562878e+01 1.64955335e+01 8.54e-05 1.72e-16 2.45e-05 0s 14 1.65437401e+01 1.65274760e+01 1.99e-05 2.15e-16 6.57e-06 0s 15 1.65401331e+01 1.65394371e+01 4.09e-07 3.63e-16 2.81e-07 0s 16 1.65400001e+01 1.65399994e+01 3.38e-14 2.53e-16 2.83e-10 0s 17 1.65400000e+01 1.65400000e+01 1.81e-14 3.33e-16 2.85e-16 0s Barrier solved model in 17 iterations and 0.02 seconds Optimal objective 1.65400000e+01 Root relaxation: objective 1.654000e+01, 811 iterations, 0.03 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 16.54000 0 29 25.00000 16.54000 33.8% - 0s H 0 0 18.0000000 16.54000 8.11% - 0s H 0 0 17.0000000 16.54000 2.71% - 0s Explored 0 nodes (2201 simplex iterations) in 0.15 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 1.700000000000e+01, best bound 1.700000000000e+01, gap 0.0% Preprocessing time: 0.02 seconds Gurobi run time: 0.15 seconds Total run time: 0.17 seconds Objective: 17 Solution: 1 x [3, 17, 38] 1 x [5, 6, 13, 38] 1 x [21, 37] 1 x [7, 18, 36] 1 x [12, 15, 35] 1 x [9, 19, 34] 1 x [1, 34] 1 x [6, 22, 33] 1 x [8, 20, 33] 2 x [26, 32] 1 x [28, 31] 1 x [29, 30] 1 x [6, 27, 27] 1 x [1, 2, 9, 10, 14, 25] 1 x [4, 11, 24, 24] 1 x [16, 23, 23]