add an option to freeze literals #228
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This commit adds an option to freeze a literal added during propagator initialization. This is important to prevent the literal from being eliminated from preprocessing. Not freezing the literal will lead to crashes if clauses over this literal are added later during propagation.
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This commit adds an option to freeze a literal added during propagator
initialization. This is important to prevent the literal from being
eliminated from preprocessing. Not freezing the literal will lead to
crashes if clauses over this literal are added later during propagation.