GLASS, J.

This is an appeal by the petitioner, Nicholas R. Mainiero, Jr., from the court's denial of his petition for a writ of habeas corpus. The writ was denied because of the habeas court's finding that the petitioner had failed to sustain the burden of proof on his claim that General Statutes 53a-39 was unconstitutional, and on his claim of ineffective assistance of counsel the time that he pleaded guilty to the charges resting in his confinement. We find no error.

The petition for a writ of habeas corpus was heard on January 6, 1989, at the Superior Court in New Haven, and the following facts were developed at the hearing and found by the habeas court as reflected in its memorandum of decision and the record. The petitioner was arrested in March, 1984, and charged with sexual assault in the first degree, in violation of General Statutes 53a-70 (a)(2), and risk of injury to child, in violation of General Statutes 53-21. Attorney Raymond Kelly, then a public defender, was appointed to represent the petitioner. Kelly had been a public defender for three years and had handled serious felony matters. Because the petitioner was at least sixteen years of age but had not reached his eighteenth birthday at the time that the charged offenses were allegedly committed, Kelly moved to have the petitioner treated as a youthful offender rather than proceed on the regular criminal docket. This motion was denied. Another motion by Kelly for a reduction of the petitioner's bond was granted, however, and he was thereafter released. While the petitioner was out on bond, he was charged with two other offenses allegedly committed in February, 1985. These additional charges were assault in the first degree, in violation of General Statutes 53a-59 (a), and larceny in the first degree, in violation of General Statutes 53a-119 and 53a-122 (a)(3).

On March 26, 1985, the petitioner's trial commenced on the charges arising out of the March, 1984 incident — sexual assault and risk of injury. After jury selection, the petitioner, on March 27, 1985, "after being completely advised by Attorney Kelly, accepted a plea bargain to the charges on that file and entered an Alford Plea. . . ." See North Carolina v. Alford, 400 U.S. 25, 91 S.Ct. 160, 27 L.Ed.2d 162 (1970). The court found that at the time the plea was entered, the petitioner's uncle, Lawrence Mainiero, was his guardian ad litem. While he was handling the sexual assault and risk of injury charges, Kelly was aware of the additional February, 1985 charges pending against the petitioner. Although the petitioner had been arraigned on the additional charges, the file had not yet been transferred from Part B to Part A of the Superior Court. Nonetheless, after extensive discussions with the trial court and the state's attorney, Kelly was able to effectuate an agreement that included the disposition of the February, 1985 charges with the disposition of the March, 1984 charges. The petitioner's Part B file containing the February, 1985 charges was then transferred to Part A of the Superior Court for consolidation and disposition with the March, 1984 charges.

The trial court found that the plea bargain disposition of the charges arising out of the March, 1984 incident provided for the petitioner to receive a sentence of five years confinement for the risk of injury and sexual assault charges. The agreement further provided that the sentences for these charges were to run concurrently with the sentences received from the February, 1985 charges of larceny and assault, with an agreed maximum of ten years imprisonment. While the court informed Kelly that he could argue for a lesser sentence, the court stated that it felt that the sentence was fair and that the petitioner would need a favorable presentence investigation report in order to receive a lesser sentence. Nonetheless, Kelly continued to negotiate for a lesser period of actual incarceration. Finally, he was successful in obtaining an agreement encompassing both files for a total effective sentence of twelve years, execution suspended after eight years of imprisonment, and five years probation. The court found that Kelly discussed with the petitioner and his uncle, the guardian ad litem, the meaning of the agreed sentence. The court also found that Kelly informed the petitioner that he would be required actually to serve five and one-half years of imprisonment and that he could serve a lesser period of imprisonment only through programs that might be provided at the correctional institution.

On June 28, 1985, the petitioner was sentenced as agreed. The petitioner was then seventeen years old. He was confined at the Manson Youth Center until May, 1988, at which time he was transferred to the Cheshire Correctional Center. Prior to commencing this action, the petitioner applied for a community release program but was found ineligible because of the length of time remaining on his sentence. The petitioner will become eligible for community release, however, in December, 1990, when only thirty months of his sentence remain. The petitioner was also advised that a modification of his sentence, under 53a-39, was unavailable to him because 53a-39 precludes modification when a sentence, such as his, exceeds five years. On appeal the petitioner now claims the following: (1) that General Statutes 53a-39 is unconstitutional as interpreted and applied by the habeas court; (2) that the habeas court incorrectly applied the law, particularly 53a-39, in accordance with the clear intent of the law; (3) that the trial court improperly canvassed the petitioner at the time that he pleaded guilty; and (4) that there was ineffective assistance of counsel when he pleaded guilty.

I

The central issue in this appeal is the petitioner's claim that the habeas court's interpretation and application of 53a-39 was unconstitutional and not in accordance with its clear intent. We are unpersuaded. Specifically, the petitioner notes that under 53a-39 a prisoner is eligible to apply for intensive probation only if his sentence is for a period of not less than two years nor more than five years. Furthermore, a prisoner is eligible to apply to the trial court for sentence modification pursuant to 53a-39 only if his sentence is not in excess of three years. If a prisoner's sentence is in excess of three years, then he must petition the sentence review division of the Superior Court pursuant to General Statutes 51-195 in order to have his sentence modified.

The petitioner notes that, because his sentence is for twelve years, he is unable to apply for intensive probation or for sentence modification under 53a-39. In addition, the petitioner is not eligible to have his sentence reviewed by the sentence review division because he entered a plea agreement and 51-195 excludes from review "any case in which the sentence or commitment imposed resulted from the court's acceptance of a plea agreement." The petitioner asserts that the habeas court erred in finding this statutory scheme constitutional. In particular, the petitioner contends that this statutory scheme is unconstitutional because it deprives him of the right to apply for intensive probation, and because it deprives him of a forum in which to argue that his sentence should be modified.

The eligibility restrictions on sentence review, sentence modification and intensive probation are statutory prescriptions established by the legislature. `A party contesting a statute's constitutionality has a heavy burden to prove unconstitutionality beyond a reasonable doubt.' State v. Dupree, 196 Conn. 655, 663, 495 A.2d 691, cert. denied, 474 U.S. 951, 106 S.Ct. 318, 88 L.Ed.2d 301 (1985); see Kellems v. Brown, 163 Conn. 478, 486, 313 A.2d 53 (1972). . . . `In examining the rationality of a legislative classification, we are bound to defer to the judgment of the legislature unless the classification is clearly irrational and unreasonable.' State v. Dupree, supra; State v. Simmat, 184 Conn. 222, 224-25, 439 A.2d 915 (1981)." State v. Wright, 198 Conn. 273, 282, 502 A.2d 911 (1986).

The petitioner has failed to cite any authority that supports his assertion that the eligibility restrictions that the legislature has imposed upon intensive probation, sentence modification and sentence review are unconstitutional. We conclude that the legislature's establishment of such eligibility restrictions was both rational and reasonable. As the habeas court correctly stated: "The legislature has a rational basis to impose whatever guidelines and procedures it deemed appropriate. Section 53a-39 used the severity of the crime and length of incarceration as guidelines for rehabilitation and public safety. . . . Accordingly, the distinctions drawn between sentences of different lengths and corresponding available alternatives or reduced punishments are rationally related. Section 53a-39 (rev'd 1989) is neither irrational nor arbitrary." In sum, the legislature has prescribed a statutorily harmonious and constitutional scheme for sentence modification, sentence review and intensive probation.

II

The petitioner also argues that the trial court did not properly canvass him when he pleaded guilty. Specifically, he contends that the trial court had a constitutional duty to inform him, at the time that he entered his pleas, of the consequences of those pleas in relation to 53a-39. We disagree.

"Under Boykin [v. Alabama, 395 U.S. 238, 243, 89 S.Ct. 1709, 23 L.Ed.2d 274 (1969)], in order for a plea to be knowingly, voluntarily and intelligently made, a trial court is required to advise a defendant that his plea operates as a waiver of three fundamental constitutional rights — jury trial, confrontation and self-incrimination." State v. Badgett, 200 Conn. 412, 418, 512 A.2d 160, cert. denied, 479 U.S. 940, 107 S.Ct. 423, 93 L.Ed.2d 373 (1986). "There is no requirement, however, that the defendant be advised of every possible consequence of such a plea." State v. Gilnite, 202 Conn. 369, 383, 521 A.2d 547 (1987).

In sum, we hold that the trial court had no duty to inform the petitioner that, because of his sentence, he would not be eligible for sentence modification or intensive probation pursuant to 53a-39. Such consequences of the petitioner's plea are simply beyond the scope of the constitutional mandates required to effectuate a valid plea of guilty under Boykin v. Alabama, supra.