
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Mon Nov 25 07:52:50 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo3981.43.log"
Using license file /Users/sara/gurobi.lic
Academic license - for non-commercial use only - expires 2025-05-12

Gurobi Optimizer version 11.0.1 build v11.0.1rc0 (mac64[x86] - Darwin 21.6.0 21G651)
Copyright (c) 2024, Gurobi Optimization, LLC

Read LP format model from file ./lp_problems/grafo3981.43.lp
Reading time = 0.16 seconds
: 103080 rows, 2364 columns, 311152 nonzeros

CPU model: Intel(R) Core(TM) i5-1038NG7 CPU @ 2.00GHz
Thread count: 4 physical cores, 8 logical processors, using up to 8 threads

Optimize a model with 103080 rows, 2364 columns and 311152 nonzeros
Model fingerprint: 0x06a7ce6f
Variable types: 47 continuous, 2317 integer (2317 binary)
Coefficient statistics:
  Matrix range     [5e-01, 5e+01]
  Objective range  [1e+00, 1e+00]
  Bounds range     [1e+00, 1e+00]
  RHS range        [1e+00, 5e+01]
Found heuristic solution: objective 3.0000000
Presolve removed 26098 rows and 27 columns
Presolve time: 0.72s
Presolved: 76982 rows, 2337 columns, 233311 nonzeros
Variable types: 0 continuous, 2337 integer (2290 binary)
Found heuristic solution: objective 9.0000000
Root relaxation presolved: 2337 rows, 79319 columns, 235648 nonzeros


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   23591    4.7803634e+01   0.000000e+00   2.112828e+04      5s
   49001    4.7789051e+01   0.000000e+00   5.855903e+01     10s
   50515    4.8000000e+01   0.000000e+00   0.000000e+00     10s
   50515    4.8000000e+01   0.000000e+00   0.000000e+00     10s

Root relaxation: objective 4.800000e+01, 50515 iterations, 9.53 seconds (7.19 work units)
Total elapsed time = 20.68s (DegenMoves)

    Nodes    |    Current Node    |     Objective Bounds      |     Work
 Expl Unexpl |  Obj  Depth IntInf | Incumbent    BestBd   Gap | It/Node Time

     0     0   48.00000    0  626    9.00000   48.00000   433%     -   21s
     0     0   48.00000    0  790    9.00000   48.00000   433%     -   35s
     0     0   48.00000    0  731    9.00000   48.00000   433%     -   37s
     0     0          -    0         9.00000   48.00000   433%     -   50s

Cutting planes:
  Gomory: 3
  Lift-and-project: 45
  Cover: 18
  Clique: 21
  MIR: 139
  GUB cover: 1
  Zero half: 31
  RLT: 71
  BQP: 2
  PSD: 1

Explored 1 nodes (77177 simplex iterations) in 50.02 seconds (47.05 work units)
Thread count was 8 (of 8 available processors)

Solution count 2: 9 3 

Time limit reached
Best objective 9.000000000000e+00, best bound 4.800000000000e+01, gap 433.3333%

Wrote result file './lp_solutions/grafo3981.43.sol'

