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assertion failure in Clasp::Asp::LogicProgram::finalizeDisjunctions #13

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tkren opened this issue Nov 3, 2017 · 2 comments
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assertion failure in Clasp::Asp::LogicProgram::finalizeDisjunctions #13

tkren opened this issue Nov 3, 2017 · 2 comments

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@tkren
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tkren commented Nov 3, 2017

The following program breaks clasp 3.3.2 (and clingo 5.2.1):

 a|b:-not c.
 c|d:-not a.

Observe:

$ gringo <<EOF | clasp
a|b:-not c.
c|d:-not a.
EOF
clasp version 3.3.2
Reading from stdin
*** ERROR: (clasp): void Clasp::Asp::LogicProgram::finalizeDisjunctions(Clasp::Asp::Preprocessor&, Clasp::uint32)@1280: assertion failure: check('dx == bot || getRootAtom(supportLit.var())->var() == dx.var()') failed
UNKNOWN

Models       : 0+
Calls        : 1
Time         : 0.000s (Solving: 0.00s 1st Model: 0.00s Unsat: 0.00s)
CPU Time     : 0.000s
$ echo $?               
65
BenKaufmann added a commit that referenced this issue Nov 3, 2017
@BenKaufmann
Remove wrong assertion
02c6d85 
  * The assertion failed to consider the case where
    a disjunction was eq to some atom that itself
    was part of a disjunction.

Fixes #13
@BenKaufmann
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Hi Thomas,
thank you for the report.
Fixed in dev.

@tkren
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tkren commented Nov 4, 2017

works as expected, cherry-picked into clasp 3.3.2-4 and gringo 5.2.1-3

@tkren tkren closed this as completed Nov 4, 2017
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@tkren @BenKaufmann