Description

In this test we run MINOS on an example that is known to cycle with
the default expand frequency.  It should not cycle if we set the
expand frequency to a lower value.

Note that the case is difficult to reproduce: it's the 4th run in a
DICOPT model that requires OSL3 be the MIP solver.  If you have a
better example let me know.

Contributor: Steve Dirkse

Small Model of Type : GAMS

Category : GAMS Test library

Main file : minos01.gms

$title 'MINOS test suite - anti-cycling via expand frequency' (MINOS01,SEQ=433)

$onText
In this test we run MINOS on an example that is known to cycle with
the default expand frequency.  It should not cycle if we set the
expand frequency to a lower value.

Note that the case is difficult to reproduce: it's the 4th run in a
DICOPT model that requires OSL3 be the MIP solver.  If you have a
better example let me know.

Contributor: Steve Dirkse
$offText


SET solver 'master set of solvers' / system.solverNames /;
SET solverPlatformMap(solver,*) / system.SolverPlatformMap /;
SET avail(*)  'Solvers available for this platform';
avail(solver) = sum(solverPlatformMap(solver,'%system.platform%'),1)
   and solvers(solver);

set dummy / osl3, dicopt /;
abort.noerror$[not avail('osl3')]   'this test requires OSL3: not found, so pass!';
abort.noerror$[not avail('dicopt')] 'this test requires DICOPT: not found, so pass!';

$call gamslib -q pump
$if errorlevel 1 $abort problems with gamslib -q pump

$onEcho > dicopt.600
nlpoptfile 600
$offEcho
$onEcho > minos.600
expand frequency 500
$offEcho

execute 'gams pump optfile=600 minlp=dicopt nlp=minos mip=osl3 lo=2';
abort$errorlevel 'gams run did not terminate normally';