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java.lang.IndexOutOfBoundsException: Index (-1) is negative at it.unimi.dsi.bits.AbstractBitVector.ensureRestrictedIndex( at it.unimi.dsi.bits.LongArrayBitVector.getBoolean( at it.unimi.dsi.bits.AbstractBitVector.getBoolean( at it.unimi.dsi.fastutil.booleans.AbstractBooleanList.get( at at at at at at at at at