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Ticket #1574 (closed defect: wontfix)

Opened 14 years ago

Last modified 9 years ago

PICO/cplex with mipHeuristics declares gesa3 integer infeasible

Reported by: bpeisle Owned by: pico-developers
Priority: normal Milestone:
Component: PICO Version: PICO 1.2.1
Keywords: Cc:
Subcomponent: Data Management

Description (last modified by wehart) (diff)

Running PICO with cplex as the lp solver on gesa3 from miplib.
command line options were: --usingCuts=false --initialDive=false
--mipHeuristic=true --preprocessIP=false

Using the same options except for --mipHeuristic=false solves the problem correctly.

The problem is also solved correctly when the lp solver is changed to clp

The ouput from the PICO/cplex with the heuristic on is below

ILOG CPLEX 9.000, licensed to "sandia-albuquerque, nm", options: e m b
Tried aggregator 1 time.
LP Presolve eliminated 24 rows and 24 columns.
Aggregator did 48 substitutions.
Reduced LP has 1296 rows, 1080 columns, and 4776 nonzeros.
Presolve time = -0.00 sec.

Iteration log . . .
Iteration: 1 Scaled infeas = 3715.487084
Iteration: 180 Scaled infeas = 1945.595613
Iteration: 357 Scaled infeas = 103.362440
Iteration: 508 Scaled infeas = 50.309084
Iteration: 678 Scaled infeas = 11.579458
Switched to devex.
Iteration: 761 Objective = 41586138.839313
Iteration: 911 Objective = 36609866.364860
Integer Infeasible

Created 1 100.0%
Started Bounding 1 100.0%
Bounded 0 0.0%
Started Splitting 0 0.0%
Split 0 0.0%
Dead 1 100.0%

Search Time: 0.0 seconds
Total Time: 0.1 seconds


Change History

comment:1 Changed 13 years ago by jeckstei

  • Status changed from new to assigned
  • dependson set to 2084

Can't try to reproduce this until we get the MIP heuristic to stop throwing exceptions for trying to deleting bad rows.

comment:2 Changed 10 years ago by wehart

  • Priority changed from high to normal
  • Version changed from Beta to PICO 1.2.1
  • Description modified (diff)
  • Milestone set to PICO 1.3

comment:3 Changed 10 years ago by jdsiiro

  • severity normal deleted

Converting all severities into priorities and deprecating the severity field.

comment:4 Changed 10 years ago by caphill

  • Milestone changed from PICO 1.3 to PICO 1.4

comment:5 Changed 9 years ago by jdsiiro

  • Status changed from assigned to closed
  • Resolution set to wontfix

comment:6 Changed 9 years ago by jdsiiro

  • Milestone PICO 1.4 deleted

(deleting PICO 1.4 milestone)


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