Build (method = -2) #dp: 2969 Step-3' Graph: 142 vertices and 418 arcs (0.03s) Step-4' Graph: 19 vertices and 172 arcs (0.03s) #V4/#V3 = 0.13 #A4/#A3 = 0.41 Ready! (0.03s) Optimize a model with 62 rows, 173 columns and 486 nonzeros Presolve removed 3 rows and 3 columns Presolve time: 0.00s Presolved: 59 rows, 170 columns, 479 nonzeros Variable types: 0 continuous, 170 integer (33 binary) Found heuristic solution: objective 56.0000000 Optimize a model with 59 rows, 170 columns and 479 nonzeros Presolved: 59 rows, 170 columns, 479 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 1.850e+02 Factor NZ : 6.500e+02 Factor Ops : 1.200e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 3.25622543e+02 -3.43064422e+02 7.83e+01 4.03e-02 4.36e+00 0s 1 7.45509935e+01 -1.26517991e+02 8.47e-13 2.22e-16 5.59e-01 0s 2 3.97841937e+01 1.64385825e+01 1.82e-14 2.22e-16 6.34e-02 0s 3 3.34012754e+01 3.29378007e+01 4.49e-14 3.05e-16 1.25e-03 0s 4 3.33334024e+01 3.33329389e+01 3.87e-14 3.33e-16 1.25e-06 0s 5 3.33333333e+01 3.33333333e+01 4.98e-14 1.42e-16 1.25e-12 0s Barrier solved model in 5 iterations and 0.00 seconds Optimal objective 3.33333333e+01 Root relaxation: objective 3.333333e+01, 123 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 33.33333 0 4 56.00000 33.33333 40.5% - 0s H 0 0 34.0000000 33.33333 1.96% - 0s Explored 0 nodes (180 simplex iterations) in 0.01 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 3.400000000000e+01, best bound 3.400000000000e+01, gap 0.0% Preprocessing time: 0.04 seconds Gurobi run time: 0.01 seconds Total run time: 0.05 seconds Objective: 34 Solution: 1 x [14, 33, 43] 2 x [20, 28, 42] 2 x [5, 26, 41] 1 x [30, 37, 40] 1 x [24, 34, 39] 1 x [2, 6, 39] 1 x [35, 36, 38] 4 x [17, 23, 38] 1 x [4, 9, 36] 2 x [16, 18, 32] 3 x [8, 11, 31] 1 x [5, 10, 30] 1 x [12, 23, 29] 1 x [6, 12, 27] 3 x [13, 21, 25] 2 x [1, 12, 22] 3 x [7, 15, 20] 2 x [3, 14, 19] 1 x [6, 8, 11] 1 x [10]