muZ returns different answers with datalog and pdr engines

Asked Jun 06 '15 at 20:00

Active Jun 07 '15 at 20:00

Viewed 71 times

I am running muZ over python with version 4.40. For one query I get a different result when I set

fp.set( "engine", "datalog" )

And when I set

fp.set( "engine", "pdr" )

The program below returns unsat for both queries with datalog and sat with pdr

sortTest, lList = EnumSort( "TestSort", ["1","2","3","4"] )
fp = Fixedpoint()
fp.set( "engine", "datalog" )
funcRel = Function( "TestFunc", sortTest, BoolSort() )
fp.register_relation( funcRel )
fp.fact( funcRel( lList[ 0 ] ) )
fp.rule( funcRel( lList[ 1 ] ), funcRel( lList[ 0 ] ) )
fp.rule( funcRel( lList[ 2 ] ), funcRel( lList[ 1 ] ) )
print fp.query( funcRel( lList[ 1 ] ) )
print fp.query( funcRel( lList[ 2 ] ) )

When I remove the line that defines the seconed rule, namely: fp.rule( funcRel( lList[ 2 ] ), funcRel( lList[ 1 ] ) ) then the first query returns sat also with datalog

An update: everything seems to work when I replace enum sort with bit vectors. Could you please confirm that this is the problem?

edited Jun 07 '15 at 20:00

asked Jun 06 '15 at 20:00

Yaron Velner

Please improve formatting. Format all inline code and citations. Here's a manual for you: http://stackoverflow.com/help/formatting – Nick Volynkin Jun 06 '15 at 20:05
If there's an error or exception, post the stacktrace in your answer. It really helps understand the problem. – Nick Volynkin Jun 06 '15 at 20:07
And the header needs to be more exact. Like "Error X when running Y in Z". – Nick Volynkin Jun 06 '15 at 20:08

muZ returns different answers with datalog and pdr engines

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