
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Mon Nov 25 11:10:14 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo3221.48.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/grafo3221.48.lp
Reading time = 0.16 seconds
: 92712 rows, 2640 columns, 280184 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 92712 rows, 2640 columns and 280184 nonzeros
Model fingerprint: 0x111abb8b
Variable types: 49 continuous, 2591 integer (2591 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]
Presolve removed 12345 rows and 0 columns
Presolve time: 0.57s
Presolved: 80367 rows, 2640 columns, 243649 nonzeros
Variable types: 0 continuous, 2640 integer (2591 binary)
Found heuristic solution: objective 5.0000000
Root relaxation presolved: 2604 rows, 82971 columns, 246289 nonzeros


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   20930    3.9976864e+01   0.000000e+00   2.556515e+04      5s
   40205    3.9960934e+01   0.000000e+00   2.004905e+04     10s
   58755    3.9955808e+01   0.000000e+00   2.366533e+03     15s
   76955    3.9954800e+01   0.000000e+00   1.331013e+01     20s
   77648    4.0000000e+01   0.000000e+00   0.000000e+00     20s
   77648    4.0000000e+01   0.000000e+00   0.000000e+00     20s
   77648    4.0000000e+01   0.000000e+00   0.000000e+00     20s

Root relaxation: objective 4.000000e+01, 77648 iterations, 19.53 seconds (14.43 work units)
Total elapsed time = 37.13s (DegenMoves)
Total elapsed time = 40.54s (DegenMoves)

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

     0     0   40.00000    0  640    5.00000   40.00000   700%     -   41s
H    0     0                       7.0000000   40.00000   471%     -   42s
     0     0          -    0         7.00000   40.00000   471%     -   50s

Cutting planes:
  Gomory: 29
  Cover: 48
  Clique: 4
  MIR: 143
  StrongCG: 1
  Zero half: 63
  RLT: 43

Explored 1 nodes (101539 simplex iterations) in 50.02 seconds (42.73 work units)
Thread count was 8 (of 8 available processors)

Solution count 2: 7 5 

Time limit reached
Best objective 7.000000000000e+00, best bound 4.000000000000e+01, gap 471.4286%

Wrote result file './lp_solutions/grafo3221.48.sol'

