Termination of the given JBC could be disproven:

(0) Obligation:

JBC Problem based on JBC Program:

package simple.whileIncrPart;

public class Main {

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

	}

}


package simple.whileIncrPart;

public class WhileIncrPart {

	public static void increase(int i) {
		while (i > 0) {
			if (i > 3) {
				i++;
			} else {
			  i--;
			}
		}
	}
}

(1) JBCNonTerm (EQUIVALENT transformation)

Reached a loop using the following run:
0:

java.lang.String = serialPersistentFields, CASE_INSENSITIVE_ORDER
[a34(lv_0_0)]
<simple.whileIncrPart.Main.main||0: load ADDR args||args: a34|| ->
	String.serialVersionUID: iconstLong_-6849794470754667710
	String.serialPersistentFields: a36
	String.CASE_INSENSITIVE_ORDER: o18
	String$CaseInsensitiveComparator.serialVersionUID: iconstLong_8575799808933029326
	RuntimeException.serialVersionUID: iconstLong_-7034897190745766939
	Exception.serialVersionUID: iconstLong_-3387516993124229948
	Throwable.serialVersionUID: iconstLong_-3042686055658047285
	i84: [0,+inf)(1){0,+inf}
	a34([java.lang.String...]): length i84
	a36([java.io.ObjectStreamField|]): length iconst_0
	o18!: String$CaseInsensitiveComparator()
Relations: 

1:

java.lang.String = serialPersistentFields, CASE_INSENSITIVE_ORDER
[a34(lv_0_0)]
<simple.whileIncrPart.Main.main||1: arraylength|| - ||a34>
	String.serialVersionUID: iconstLong_-6849794470754667710
	String.serialPersistentFields: a36
	String.CASE_INSENSITIVE_ORDER: o18
	String$CaseInsensitiveComparator.serialVersionUID: iconstLong_8575799808933029326
	RuntimeException.serialVersionUID: iconstLong_-7034897190745766939
	Exception.serialVersionUID: iconstLong_-3387516993124229948
	Throwable.serialVersionUID: iconstLong_-3042686055658047285
	i84: [0,+inf)(1){0,+inf}
	a34([java.lang.String...]): length i84
	a36([java.io.ObjectStreamField|]): length iconst_0
	o18!: String$CaseInsensitiveComparator()
Relations: 

2:

java.lang.String = serialPersistentFields, CASE_INSENSITIVE_ORDER
[a34(lv_0_0)]
<simple.whileIncrPart.Main.main||2: simple.whileIncrPart.WhileIncrPart.increase(I)V|| - ||i84>
	String.serialVersionUID: iconstLong_-6849794470754667710
	String.serialPersistentFields: a36
	String.CASE_INSENSITIVE_ORDER: o18
	String$CaseInsensitiveComparator.serialVersionUID: iconstLong_8575799808933029326
	RuntimeException.serialVersionUID: iconstLong_-7034897190745766939
	Exception.serialVersionUID: iconstLong_-3387516993124229948
	Throwable.serialVersionUID: iconstLong_-3042686055658047285
	i84: [0,+inf)(1){0,+inf}
	a34([java.lang.String...]): length i84
	a36([java.io.ObjectStreamField|]): length iconst_0
	o18!: String$CaseInsensitiveComparator()
Relations: 

3:

<simple.whileIncrPart.WhileIncrPart.increase||0: load INT i||i: i84|| ->
java.lang.String = serialPersistentFields, CASE_INSENSITIVE_ORDER
[a34(lv_0_0)]
<simple.whileIncrPart.Main.main||2: simple.whileIncrPart.WhileIncrPart.increase|| - ||i84>
	String.serialVersionUID: iconstLong_-6849794470754667710
	String.serialPersistentFields: a36
	String.CASE_INSENSITIVE_ORDER: o18
	String$CaseInsensitiveComparator.serialVersionUID: iconstLong_8575799808933029326
	RuntimeException.serialVersionUID: iconstLong_-7034897190745766939
	Exception.serialVersionUID: iconstLong_-3387516993124229948
	Throwable.serialVersionUID: iconstLong_-3042686055658047285
	i84: [0,+inf)(1){0,+inf}
	a34([java.lang.String...]): length i84
	a36([java.io.ObjectStreamField|]): length iconst_0
	o18!: String$CaseInsensitiveComparator()
Relations: 

Start state of loop:

<simple.whileIncrPart.WhileIncrPart.increase||0: load INT i||i: i16|| ->
java.lang.String = serialPersistentFields, CASE_INSENSITIVE_ORDER
[a6(lv_0_0)]
<simple.whileIncrPart.Main.main||2: simple.whileIncrPart.WhileIncrPart.increase|| - ||i17>
	String.serialVersionUID: iconstLong_-6849794470754667710
	String.serialPersistentFields: a5
	String.CASE_INSENSITIVE_ORDER: o3
	String$CaseInsensitiveComparator.serialVersionUID: iconstLong_8575799808933029326
	RuntimeException.serialVersionUID: iconstLong_-7034897190745766939
	Exception.serialVersionUID: iconstLong_-3387516993124229948
	Throwable.serialVersionUID: iconstLong_-3042686055658047285
	a5([java.io.ObjectStreamField|]): length iconst_0
	o3!: String$CaseInsensitiveComparator()
	i16: [0,+inf)(1){-1,+inf}
	i17: [0,+inf)(1){0,+inf}
	a6([java.lang.String...]): length i17
Relations: 

In the loop head node, references [i16] were interesting.
By SMT, we could prove
((0 <= initial_i16 and 0 <= initial_i17) and (((path2_i16 = path2_i25 and path2_i25 = path2_i30 and path2_i32 = (path2_i30 + 1) and path2_i32 = res_i16 and path2_i17 = res_i17 and path2_i16 = initial_i16 and path2_i17 = initial_i17) and (path2_i25 > 0 and T and path2_i30 > 3)) and ((res_i16 = res_i25 and res_i25 = res_i30 and res_i32 = (res_i30 + 1)) and !(res_i25 > 0 and T and res_i30 > 3))))
to be UNSAT. Consequently, the loop will not terminate.

(2) NO