Fifth Degree Arson covers attempted Arson

Rhode Island General Laws § 11-2-6 Arson- Fifth Degree- Any person who knowingly attempts to cause, procure, aid, or counsel by fire or explosion the damage or destruction of any property mentioned in §§ 11-4-2 – 11-4-5 shall, upon conviction, be fined not exceeding one thousand dollars ($1,000), or imprisonment for not less than one year nor more than twenty (20) years.

In Massachusetts, the equivalent is Chapter 266. Section 5A: Attempts- Whoever wilfully and maliciously attempts to set fire to, or attempts to burn, or aids, counsels or assists in such an attempt to set fire to or burn, any of the buildings, structures or property mentioned in the foregoing sections, or whoever commits any act preliminary thereto or in furtherance thereof, shall be punished by imprisonment in the state prison for not more than ten years, or by imprisonment in a jail or house of correction for not more than two and one half years or by a fine of not more than one thousand dollars.