Termination of the given JBC could be disproven:

(0) Obligation:

JBC Problem based on JBC Program:

package simple.ex08;

public class Ex08 {

	public static void loop(int i) {
		boolean up = false;
		while (i > 0) {
			if (i == 1) {
				up = true;
			}
			if (i == 10) {
				up = false;
			}
			if (up) {
				i++;
			} else {
				i--;
			}
		}
	}
}


package simple.ex08;

public class Main {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		Ex08.loop(args.length);
	}

}

(1) JBCNonTerm (EQUIVALENT transformation)

Reached a loop using the following run:
0:

java.lang.String = serialPersistentFields, CASE_INSENSITIVE_ORDER
[a169(lv_0_0)]
<simple.ex08.Main.main||0: load ADDR args||args: a169|| ->
	String.serialVersionUID: iconstLong_-6849794470754667710
	String.serialPersistentFields: a171
	String.CASE_INSENSITIVE_ORDER: o118
	String$CaseInsensitiveComparator.serialVersionUID: iconstLong_8575799808933029326
	RuntimeException.serialVersionUID: iconstLong_-7034897190745766939
	Exception.serialVersionUID: iconstLong_-3387516993124229948
	Throwable.serialVersionUID: iconstLong_-3042686055658047285
	i135: [0,+inf)(2){0,+inf}
	a169([java.lang.String...]): length i135
	a171([java.io.ObjectStreamField|]): length iconst_0
	o118!: String$CaseInsensitiveComparator()
Relations: 

1:

java.lang.String = serialPersistentFields, CASE_INSENSITIVE_ORDER
[a169(lv_0_0)]
<simple.ex08.Main.main||1: arraylength|| - ||a169>
	String.serialVersionUID: iconstLong_-6849794470754667710
	String.serialPersistentFields: a171
	String.CASE_INSENSITIVE_ORDER: o118
	String$CaseInsensitiveComparator.serialVersionUID: iconstLong_8575799808933029326
	RuntimeException.serialVersionUID: iconstLong_-7034897190745766939
	Exception.serialVersionUID: iconstLong_-3387516993124229948
	Throwable.serialVersionUID: iconstLong_-3042686055658047285
	i135: [0,+inf)(2){0,+inf}
	a169([java.lang.String...]): length i135
	a171([java.io.ObjectStreamField|]): length iconst_0
	o118!: String$CaseInsensitiveComparator()
Relations: 

2:

java.lang.String = serialPersistentFields, CASE_INSENSITIVE_ORDER
[a169(lv_0_0)]
<simple.ex08.Main.main||2: simple.ex08.Ex08.loop(I)V|| - ||i135>
	String.serialVersionUID: iconstLong_-6849794470754667710
	String.serialPersistentFields: a171
	String.CASE_INSENSITIVE_ORDER: o118
	String$CaseInsensitiveComparator.serialVersionUID: iconstLong_8575799808933029326
	RuntimeException.serialVersionUID: iconstLong_-7034897190745766939
	Exception.serialVersionUID: iconstLong_-3387516993124229948
	Throwable.serialVersionUID: iconstLong_-3042686055658047285
	i135: [0,+inf)(2){0,+inf}
	a169([java.lang.String...]): length i135
	a171([java.io.ObjectStreamField|]): length iconst_0
	o118!: String$CaseInsensitiveComparator()
Relations: 

3:

<simple.ex08.Ex08.loop||0: push 0||i: i135|| ->
java.lang.String = serialPersistentFields, CASE_INSENSITIVE_ORDER
[a169(lv_0_0)]
<simple.ex08.Main.main||2: simple.ex08.Ex08.loop|| - ||i135>
	String.serialVersionUID: iconstLong_-6849794470754667710
	String.serialPersistentFields: a171
	String.CASE_INSENSITIVE_ORDER: o118
	String$CaseInsensitiveComparator.serialVersionUID: iconstLong_8575799808933029326
	RuntimeException.serialVersionUID: iconstLong_-7034897190745766939
	Exception.serialVersionUID: iconstLong_-3387516993124229948
	Throwable.serialVersionUID: iconstLong_-3042686055658047285
	i135: [0,+inf)(2){0,+inf}
	a169([java.lang.String...]): length i135
	a171([java.io.ObjectStreamField|]): length iconst_0
	o118!: String$CaseInsensitiveComparator()
Relations: 

4:

<simple.ex08.Ex08.loop||1: store INT to up||i: i135||iconst_0>
java.lang.String = serialPersistentFields, CASE_INSENSITIVE_ORDER
[a169(lv_0_0)]
<simple.ex08.Main.main||2: simple.ex08.Ex08.loop|| - ||i135>
	String.serialVersionUID: iconstLong_-6849794470754667710
	String.serialPersistentFields: a171
	String.CASE_INSENSITIVE_ORDER: o118
	String$CaseInsensitiveComparator.serialVersionUID: iconstLong_8575799808933029326
	RuntimeException.serialVersionUID: iconstLong_-7034897190745766939
	Exception.serialVersionUID: iconstLong_-3387516993124229948
	Throwable.serialVersionUID: iconstLong_-3042686055658047285
	i135: [0,+inf)(2){0,+inf}
	a169([java.lang.String...]): length i135
	a171([java.io.ObjectStreamField|]): length iconst_0
	o118!: String$CaseInsensitiveComparator()
Relations: 

5:

<simple.ex08.Ex08.loop||2: load INT i||i: i135, up: iconst_0|| ->
java.lang.String = serialPersistentFields, CASE_INSENSITIVE_ORDER
[a169(lv_0_0)]
<simple.ex08.Main.main||2: simple.ex08.Ex08.loop|| - ||i135>
	String.serialVersionUID: iconstLong_-6849794470754667710
	String.serialPersistentFields: a171
	String.CASE_INSENSITIVE_ORDER: o118
	String$CaseInsensitiveComparator.serialVersionUID: iconstLong_8575799808933029326
	RuntimeException.serialVersionUID: iconstLong_-7034897190745766939
	Exception.serialVersionUID: iconstLong_-3387516993124229948
	Throwable.serialVersionUID: iconstLong_-3042686055658047285
	i135: [0,+inf)(2){0,+inf}
	a169([java.lang.String...]): length i135
	a171([java.io.ObjectStreamField|]): length iconst_0
	o118!: String$CaseInsensitiveComparator()
Relations: 

Start state of loop:

<simple.ex08.Ex08.loop||2: load INT i||i: i43, up: i44|| ->
java.lang.String = serialPersistentFields, CASE_INSENSITIVE_ORDER
[a52(lv_0_0)]
<simple.ex08.Main.main||2: simple.ex08.Ex08.loop|| - ||i20>
	String.serialVersionUID: iconstLong_-6849794470754667710
	String.serialPersistentFields: a51
	String.CASE_INSENSITIVE_ORDER: o44
	String$CaseInsensitiveComparator.serialVersionUID: iconstLong_8575799808933029326
	RuntimeException.serialVersionUID: iconstLong_-7034897190745766939
	Exception.serialVersionUID: iconstLong_-3387516993124229948
	Throwable.serialVersionUID: iconstLong_-3042686055658047285
	a51([java.io.ObjectStreamField|]): length iconst_0
	o44!: String$CaseInsensitiveComparator()
	i43: [0,+inf)(2){-1,+inf}
	i44: [0,1](1){0,1}
	i20: [0,+inf)(1){0,+inf}
	a52([java.lang.String...]): length i20
Relations: 

In the loop head node, references [i43, i44, iconst_0] were interesting.
By SMT, we could prove
((0 <= initial_i43 and 0 <= initial_i44 and initial_i44 <= 1 and 0 <= initial_i20) and (((path4_i43 = path4_i78 and path4_i78 = path4_i81 and path4_i81 = path4_i86 and path4_i89 = (path4_i86 + 1) and path4_i89 = res_i43 and 1 = res_i44 and path4_i20 = res_i20 and path4_i43 = initial_i43 and path4_i44 = initial_i44 and path4_i20 = initial_i20) and (path4_i78 > 0 and T and path4_i81 > 1 and T and path4_i86 > 10 and path4_i44 = 1 and 1 > 0)) and ((res_i43 = res_i78 and res_i78 = res_i81 and res_i81 = res_i86 and res_i89 = (res_i86 + 1)) and !(res_i78 > 0 and T and res_i81 > 1 and T and res_i86 > 10 and res_i44 = 1 and 1 > 0))))
to be UNSAT. Consequently, the loop will not terminate.

(2) NO