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Bug multiple sat/1 combined with weighted_maximum/3 #15

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ghost opened this issue Mar 4, 2021 · 0 comments
Open

Bug multiple sat/1 combined with weighted_maximum/3 #15

ghost opened this issue Mar 4, 2021 · 0 comments

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@ghost
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ghost commented Mar 4, 2021 •
edited by ghost
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Should weighted_maximum/3 work together with multiple sat/1
constraints. I get the following result:

/* SWI-Prolog (threaded, 64 bits, version 8.3.20) */
̀?- sat(~(Y*X)), sat(Z=:=Y), weighted_maximum([7,2,5],[X,Y,Z],W).
false.

But was rather expecting:

?- sat(~(Y*X)), sat(Z=:=Y), weighted_maximum([7,2,5],[X,Y,Z],W).
Y = 1, X = 0, Z = 1, W = 7 ;
Y = 0, X = 1, Z = 0, W = 7
@ghost ghost changed the title Bug in CLP(B) when multiple sat/1 combined with weighted_maximum/3 Bug multiple sat/1 combined with weighted_maximum/3 Mar 4, 2021
triska added a commit to triska/scryer-prolog that referenced this issue Mar 5, 2021
@triska
FIXED: CLP(B): weighted_maximum/3 with repeated variables
0fb74b5 
Many thanks to @jburse for reporting this issue:

    triska/clpz#15

Example:

    ?- sat(~(Y*X)), sat(Z=:=Y), weighted_maximum([7,2,5],[X,Y,Z],W).
       W = 7, Y = 0, X = 1, Z = 0
    ;  W = 7, Y = 1, X = 0, Z = 1
    ;  false.
@triska triska mentioned this issue Mar 5, 2021
Merged
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