Termination of the given JBC could be disproven:

(0) Obligation:

JBC Problem based on JBC Program:
Manifest-Version: 1.0 Created-By: 1.6.0_26 (Sun Microsystems Inc.) Main-Class: simple/complInterv3/Main

package simple.complInterv3;

public class ComplInterv3 {

	public static void loop(int i) {
		while (i != 0) {
			if (i > 5) {
				i++;
			} else {
				if (i < -5) {
					i--;
				} else {
					i = 0;
				}
			}
		}
	}
}


package simple.complInterv3;

public class Main {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		ComplInterv3.loop(args.length);

	}

}

(1) JBCNonTerm (EQUIVALENT transformation)

Reached a loop using the following run:
0:

<simple.complInterv3.Main.main||0: load ADDR args||args: a34|| ->
	String.serialVersionUID: -6849794470754667710L
	String.serialPersistentFields: a32
	String.CASE_INSENSITIVE_ORDER: o17
	String$CaseInsensitiveComparator.serialVersionUID: 8575799808933029326L
	RuntimeException.serialVersionUID: -7034897190745766939L
	Exception.serialVersionUID: -3387516993124229948L
	Throwable.serialVersionUID: -3042686055658047285L
	o17!: String$CaseInsensitiveComparator()
	a32([java.io.ObjectStreamField|]): length 0
	a34([java.lang.String...]): length 6

1:

<simple.complInterv3.Main.main||1: arraylength|| - ||a34>
	String.serialVersionUID: -6849794470754667710L
	String.serialPersistentFields: a32
	String.CASE_INSENSITIVE_ORDER: o17
	String$CaseInsensitiveComparator.serialVersionUID: 8575799808933029326L
	RuntimeException.serialVersionUID: -7034897190745766939L
	Exception.serialVersionUID: -3387516993124229948L
	Throwable.serialVersionUID: -3042686055658047285L
	o17!: String$CaseInsensitiveComparator()
	a32([java.io.ObjectStreamField|]): length 0
	a34([java.lang.String...]): length 6

2:

<simple.complInterv3.Main.main||2: simple.complInterv3.ComplInterv3.loop(I)V|| - ||6>
	String.serialVersionUID: -6849794470754667710L
	String.serialPersistentFields: a32
	String.CASE_INSENSITIVE_ORDER: o17
	String$CaseInsensitiveComparator.serialVersionUID: 8575799808933029326L
	RuntimeException.serialVersionUID: -7034897190745766939L
	Exception.serialVersionUID: -3387516993124229948L
	Throwable.serialVersionUID: -3042686055658047285L
	o17!: String$CaseInsensitiveComparator()
	a32([java.io.ObjectStreamField|]): length 0
	a34([java.lang.String...]): length 6

3:

<simple.complInterv3.ComplInterv3.loop||0: load INT i||i: 6|| ->
<simple.complInterv3.Main.main||2: simple.complInterv3.ComplInterv3.loop|| - ||6>
	String.serialVersionUID: -6849794470754667710L
	String.serialPersistentFields: a32
	String.CASE_INSENSITIVE_ORDER: o17
	String$CaseInsensitiveComparator.serialVersionUID: 8575799808933029326L
	RuntimeException.serialVersionUID: -7034897190745766939L
	Exception.serialVersionUID: -3387516993124229948L
	Throwable.serialVersionUID: -3042686055658047285L
	o17!: String$CaseInsensitiveComparator()
	a32([java.io.ObjectStreamField|]): length 0
	a34([java.lang.String...]): length 6

In the loop head node, references [i15] were interesting.
By SMT, we could prove
((0 <= initial_i15 and 0 <= initial_i14) and (((path1_i15 = path1_i24 and path1_i24 = path1_i29 and path1_i31 = (path1_i29 + 1) and path1_i31 = res_i15 and path1_i14 = res_i14 and path1_i15 = initial_i15 and path1_i14 = initial_i14) and (path1_i24 > 0 and path1_i29 > 5)) and ((res_i15 = res_i24 and res_i24 = res_i29 and res_i31 = (res_i29 + 1)) and !(res_i24 > 0 and res_i29 > 5))))
to be UNSAT. Consequently, the loop will not terminate.

(2) NO