Termination of the given JBC could be disproven:

(0) Obligation:

JBC Problem based on JBC Program:

public class NO_21 {
    public static void main(String args[]) {
	int i = 0;
	while (i < 100) {
	    i++;
	    i--;
	}
    }
}

(1) JBCNonTerm (EQUIVALENT transformation)

Constructed a run with a repetition. States 2 and 8 are repetitions.
0:

java.lang.String = serialPersistentFields, CASE_INSENSITIVE_ORDER
[a2(lv_0_0)]
<NO_21.main||0: push 0|| - || ->
	String.serialVersionUID: iconstLong_-6849794470754667710
	String.serialPersistentFields: a4
	String.CASE_INSENSITIVE_ORDER: o2
	String$CaseInsensitiveComparator.serialVersionUID: iconstLong_8575799808933029326
	RuntimeException.serialVersionUID: iconstLong_-7034897190745766939
	Exception.serialVersionUID: iconstLong_-3387516993124229948
	Throwable.serialVersionUID: iconstLong_-3042686055658047285
	a2([java.lang.String...]): length iconst_0
	a4([java.io.ObjectStreamField|]): length iconst_0
	o2!: String$CaseInsensitiveComparator()
Relations: 

1:

java.lang.String = serialPersistentFields, CASE_INSENSITIVE_ORDER
[a2(lv_0_0)]
<NO_21.main||1: store INT to #1|| - ||iconst_0>
	String.serialVersionUID: iconstLong_-6849794470754667710
	String.serialPersistentFields: a4
	String.CASE_INSENSITIVE_ORDER: o2
	String$CaseInsensitiveComparator.serialVersionUID: iconstLong_8575799808933029326
	RuntimeException.serialVersionUID: iconstLong_-7034897190745766939
	Exception.serialVersionUID: iconstLong_-3387516993124229948
	Throwable.serialVersionUID: iconstLong_-3042686055658047285
	a2([java.lang.String...]): length iconst_0
	a4([java.io.ObjectStreamField|]): length iconst_0
	o2!: String$CaseInsensitiveComparator()
Relations: 

2:

java.lang.String = serialPersistentFields, CASE_INSENSITIVE_ORDER
[a2(lv_0_0)]
<NO_21.main||2: load INT #1||#1: iconst_0|| ->
	String.serialVersionUID: iconstLong_-6849794470754667710
	String.serialPersistentFields: a4
	String.CASE_INSENSITIVE_ORDER: o2
	String$CaseInsensitiveComparator.serialVersionUID: iconstLong_8575799808933029326
	RuntimeException.serialVersionUID: iconstLong_-7034897190745766939
	Exception.serialVersionUID: iconstLong_-3387516993124229948
	Throwable.serialVersionUID: iconstLong_-3042686055658047285
	a2([java.lang.String...]): length iconst_0
	a4([java.io.ObjectStreamField|]): length iconst_0
	o2!: String$CaseInsensitiveComparator()
Relations: 

3:

java.lang.String = serialPersistentFields, CASE_INSENSITIVE_ORDER
[a2(lv_0_0)]
<NO_21.main||3: push 100||#1: iconst_0||iconst_0>
	String.serialVersionUID: iconstLong_-6849794470754667710
	String.serialPersistentFields: a4
	String.CASE_INSENSITIVE_ORDER: o2
	String$CaseInsensitiveComparator.serialVersionUID: iconstLong_8575799808933029326
	RuntimeException.serialVersionUID: iconstLong_-7034897190745766939
	Exception.serialVersionUID: iconstLong_-3387516993124229948
	Throwable.serialVersionUID: iconstLong_-3042686055658047285
	a2([java.lang.String...]): length iconst_0
	a4([java.io.ObjectStreamField|]): length iconst_0
	o2!: String$CaseInsensitiveComparator()
Relations: 

4:

java.lang.String = serialPersistentFields, CASE_INSENSITIVE_ORDER
[a2(lv_0_0)]
<NO_21.main||5: GE||#1: iconst_0||iconst_0, iconst_100>
	String.serialVersionUID: iconstLong_-6849794470754667710
	String.serialPersistentFields: a4
	String.CASE_INSENSITIVE_ORDER: o2
	String$CaseInsensitiveComparator.serialVersionUID: iconstLong_8575799808933029326
	RuntimeException.serialVersionUID: iconstLong_-7034897190745766939
	Exception.serialVersionUID: iconstLong_-3387516993124229948
	Throwable.serialVersionUID: iconstLong_-3042686055658047285
	a2([java.lang.String...]): length iconst_0
	a4([java.io.ObjectStreamField|]): length iconst_0
	o2!: String$CaseInsensitiveComparator()
Relations: 

5:

java.lang.String = serialPersistentFields, CASE_INSENSITIVE_ORDER
[a2(lv_0_0)]
<NO_21.main||8: increment #1 by 1||#1: iconst_0|| ->
	String.serialVersionUID: iconstLong_-6849794470754667710
	String.serialPersistentFields: a4
	String.CASE_INSENSITIVE_ORDER: o2
	String$CaseInsensitiveComparator.serialVersionUID: iconstLong_8575799808933029326
	RuntimeException.serialVersionUID: iconstLong_-7034897190745766939
	Exception.serialVersionUID: iconstLong_-3387516993124229948
	Throwable.serialVersionUID: iconstLong_-3042686055658047285
	a2([java.lang.String...]): length iconst_0
	a4([java.io.ObjectStreamField|]): length iconst_0
	o2!: String$CaseInsensitiveComparator()
Relations: 

6:

java.lang.String = serialPersistentFields, CASE_INSENSITIVE_ORDER
[a2(lv_0_0)]
<NO_21.main||11: increment #1 by -1||#1: iconst_1|| ->
	String.serialVersionUID: iconstLong_-6849794470754667710
	String.serialPersistentFields: a4
	String.CASE_INSENSITIVE_ORDER: o2
	String$CaseInsensitiveComparator.serialVersionUID: iconstLong_8575799808933029326
	RuntimeException.serialVersionUID: iconstLong_-7034897190745766939
	Exception.serialVersionUID: iconstLong_-3387516993124229948
	Throwable.serialVersionUID: iconstLong_-3042686055658047285
	a2([java.lang.String...]): length iconst_0
	a4([java.io.ObjectStreamField|]): length iconst_0
	o2!: String$CaseInsensitiveComparator()
Relations: 

7:

java.lang.String = serialPersistentFields, CASE_INSENSITIVE_ORDER
[a2(lv_0_0)]
<NO_21.main||14: jmp||#1: iconst_0|| ->
	String.serialVersionUID: iconstLong_-6849794470754667710
	String.serialPersistentFields: a4
	String.CASE_INSENSITIVE_ORDER: o2
	String$CaseInsensitiveComparator.serialVersionUID: iconstLong_8575799808933029326
	RuntimeException.serialVersionUID: iconstLong_-7034897190745766939
	Exception.serialVersionUID: iconstLong_-3387516993124229948
	Throwable.serialVersionUID: iconstLong_-3042686055658047285
	a2([java.lang.String...]): length iconst_0
	a4([java.io.ObjectStreamField|]): length iconst_0
	o2!: String$CaseInsensitiveComparator()
Relations: 

8:

java.lang.String = serialPersistentFields, CASE_INSENSITIVE_ORDER
[a2(lv_0_0)]
<NO_21.main||2: load INT #1||#1: iconst_0|| ->
	String.serialVersionUID: iconstLong_-6849794470754667710
	String.serialPersistentFields: a4
	String.CASE_INSENSITIVE_ORDER: o2
	String$CaseInsensitiveComparator.serialVersionUID: iconstLong_8575799808933029326
	RuntimeException.serialVersionUID: iconstLong_-7034897190745766939
	Exception.serialVersionUID: iconstLong_-3387516993124229948
	Throwable.serialVersionUID: iconstLong_-3042686055658047285
	a2([java.lang.String...]): length iconst_0
	a4([java.io.ObjectStreamField|]): length iconst_0
	o2!: String$CaseInsensitiveComparator()
Relations: 

(2) NO