7.03/2.75	NO
7.24/2.81	proof of /export/starexec/sandbox/benchmark/theBenchmark.jar
7.24/2.81	# AProVE Commit ID: 48fb2092695e11cc9f56e44b17a92a5f88ffb256 marcel 20180622 unpublished dirty
7.24/2.81	
7.24/2.81	
7.24/2.81	termination of the given Bare JBC problem could be disproven:
7.24/2.81	
7.24/2.81	(0) Bare JBC problem
7.24/2.81	(1) BareJBCToJBCProof [EQUIVALENT, 95 ms]
7.24/2.81	(2) JBC problem
7.24/2.81	(3) JBCNonTerm [COMPLETE, 455 ms]
7.24/2.81	(4) NO
7.24/2.81	
7.24/2.81	
7.24/2.81	----------------------------------------
7.24/2.81	
7.24/2.81	(0)
7.24/2.81	Obligation:
7.24/2.81	need to prove termination of the following program:
7.24/2.81	package simple.middle;
7.24/2.81	
7.24/2.81	public class Main {
7.24/2.81	
7.24/2.81		/**
7.24/2.81		 * @param args
7.24/2.81		 */
7.24/2.81		public static void main(String[] args) {
7.24/2.81			Middle.middle(args[0].length(), args[1].length());
7.24/2.81		}
7.24/2.81	
7.24/2.81	}
7.24/2.81	
7.24/2.81	
7.24/2.81	package simple.middle;
7.24/2.81	
7.24/2.81	public class Middle {
7.24/2.81	
7.24/2.81		/*
7.24/2.81		 * returns the number which is exactly between the first and the second
7.24/2.81		 * input number, does not work if one number is even and one is odd or if i <
7.24/2.81		 * j
7.24/2.81		 */
7.24/2.81		public static int middle(int i, int j) {
7.24/2.81			while (i != j) {
7.24/2.81				i--;
7.24/2.81				j++;
7.24/2.81			}
7.24/2.81			return i;
7.24/2.81		}
7.24/2.81	}
7.24/2.81	
7.24/2.81	
7.24/2.81	
7.24/2.81	----------------------------------------
7.24/2.81	
7.24/2.81	(1) BareJBCToJBCProof (EQUIVALENT)
7.24/2.81	initialized classpath
7.24/2.81	----------------------------------------
7.24/2.81	
7.24/2.81	(2)
7.24/2.81	Obligation:
7.24/2.81	need to prove termination of the following program:
7.24/2.81	package simple.middle;
7.24/2.81	
7.24/2.81	public class Main {
7.24/2.81	
7.24/2.81		/**
7.24/2.81		 * @param args
7.24/2.81		 */
7.24/2.81		public static void main(String[] args) {
7.24/2.81			Middle.middle(args[0].length(), args[1].length());
7.24/2.81		}
7.24/2.81	
7.24/2.81	}
7.24/2.81	
7.24/2.81	
7.24/2.81	package simple.middle;
7.24/2.81	
7.24/2.81	public class Middle {
7.24/2.81	
7.24/2.81		/*
7.24/2.81		 * returns the number which is exactly between the first and the second
7.24/2.81		 * input number, does not work if one number is even and one is odd or if i <
7.24/2.81		 * j
7.24/2.81		 */
7.24/2.81		public static int middle(int i, int j) {
7.24/2.81			while (i != j) {
7.24/2.81				i--;
7.24/2.81				j++;
7.24/2.81			}
7.24/2.81			return i;
7.24/2.81		}
7.24/2.81	}
7.24/2.81	
7.24/2.81	
7.24/2.81	
7.24/2.81	----------------------------------------
7.24/2.81	
7.24/2.81	(3) JBCNonTerm (COMPLETE)
7.24/2.81	Reached a loop using the following run: 
7.24/2.81	
7.24/2.81	0:<simple.middle.Main.main||0: load ADDR args||args: a18|| ->
7.24/2.81		o35!: String(count=1, hash=#, offset=0, value=o36?) -->{java.lang.Object...}
7.24/2.81		a18([java.lang.String...]): {o15, o35} -->{java.lang.Object...}
7.24/2.81		o15!: String(count=0, hash=#, offset=0, value=o16?) -->{java.lang.Object...}
7.24/2.81	o36:: [CHAR] -->{java.lang.Object...}
7.24/2.81	o16:: [CHAR] -->{java.lang.Object...}
7.24/2.81	a18-><-o36
7.24/2.81	a18-><-o35
7.24/2.81	a18-><-o16
7.24/2.81	a18-><-o15
7.24/2.81	YES:  (JL1)
7.24/2.81	1:<simple.middle.Main.main||1: push 0||args: a18||a18>
7.24/2.81		o35!: String(count=1, hash=#, offset=0, value=o36?) -->{java.lang.Object...}
7.24/2.81		a18([java.lang.String...]): {o15, o35} -->{java.lang.Object...}
7.24/2.81		o15!: String(count=0, hash=#, offset=0, value=o16?) -->{java.lang.Object...}
7.24/2.81	o36:: [CHAR] -->{java.lang.Object...}
7.24/2.81	o16:: [CHAR] -->{java.lang.Object...}
7.24/2.81	a18-><-o36
7.24/2.81	a18-><-o35
7.24/2.81	a18-><-o16
7.24/2.81	a18-><-o15
7.24/2.81	YES:  (JL1)
7.24/2.81	2:<simple.middle.Main.main||2: Read ADDR from array||args: a18||a18, 0>
7.24/2.81		o35!: String(count=1, hash=#, offset=0, value=o36?) -->{java.lang.Object...}
7.24/2.81		a18([java.lang.String...]): {o15, o35} -->{java.lang.Object...}
7.24/2.81		o15!: String(count=0, hash=#, offset=0, value=o16?) -->{java.lang.Object...}
7.24/2.81	o36:: [CHAR] -->{java.lang.Object...}
7.24/2.81	o16:: [CHAR] -->{java.lang.Object...}
7.24/2.81	a18-><-o36
7.24/2.81	a18-><-o35
7.24/2.81	a18-><-o16
7.24/2.81	a18-><-o15
7.24/2.81	YES:  (JL1)
7.24/2.81	3:<simple.middle.Main.main||3: java.lang.String.length()I||args: a18||o15>
7.24/2.81		o35!: String(count=1, hash=#, offset=0, value=o36?) -->{java.lang.Object...}
7.24/2.81		a18([java.lang.String...]): {o15, o35} -->{java.lang.Object...}
7.24/2.81		o15!: String(count=0, hash=#, offset=0, value=o16?) -->{java.lang.Object...}
7.24/2.81	o36:: [CHAR] -->{java.lang.Object...}
7.24/2.81	o16:: [CHAR] -->{java.lang.Object...}
7.24/2.81	a18-><-o36
7.24/2.81	a18-><-o35
7.24/2.81	a18-><-o16
7.24/2.81	a18-><-o15
7.24/2.81	YES:  (JL1)
7.24/2.81	4:<java.lang.String.length||0: load ADDR this||this: o15|| ->
7.24/2.81	<simple.middle.Main.main||3: java.lang.String.length||args: a18|| ->
7.24/2.81		o35!: String(count=1, hash=#, offset=0, value=o36?) -->{java.lang.Object...}
7.24/2.81		a18([java.lang.String...]): {o15, o35} -->{java.lang.Object...}
7.24/2.81		o15!: String(count=0, hash=#, offset=0, value=o16?) -->{java.lang.Object...}
7.24/2.81	o36:: [CHAR] -->{java.lang.Object...}
7.24/2.81	o16:: [CHAR] -->{java.lang.Object...}
7.24/2.81	a18-><-o36
7.24/2.81	a18-><-o35
7.24/2.81	a18-><-o16
7.24/2.81	a18-><-o15
7.24/2.81	YES:  (JL1)
7.24/2.81	5:<java.lang.String.length||1: Read from count|| - ||o15>
7.24/2.81	<simple.middle.Main.main||3: java.lang.String.length||args: a18|| ->
7.24/2.81		o35!: String(count=1, hash=#, offset=0, value=o36?) -->{java.lang.Object...}
7.24/2.81		a18([java.lang.String...]): {o15, o35} -->{java.lang.Object...}
7.24/2.81		o15!: String(count=0, hash=#, offset=0, value=o16?) -->{java.lang.Object...}
7.24/2.81	o36:: [CHAR] -->{java.lang.Object...}
7.24/2.81	o16:: [CHAR] -->{java.lang.Object...}
7.24/2.81	a18-><-o36
7.24/2.81	a18-><-o35
7.24/2.81	a18-><-o16
7.24/2.81	a18-><-o15
7.24/2.81	YES:  (JL1)
7.24/2.81	6:<java.lang.String.length||4: return INT|| - ||0>
7.24/2.81	<simple.middle.Main.main||3: java.lang.String.length||args: a18|| ->
7.24/2.81		o35!: String(count=1, hash=#, offset=0, value=o36?) -->{java.lang.Object...}
7.24/2.81		a18([java.lang.String...]): {o15, o35} -->{java.lang.Object...}
7.24/2.81		o15!: String(count=0, hash=#, offset=0, value=o16?) -->{java.lang.Object...}
7.24/2.81	o36:: [CHAR] -->{java.lang.Object...}
7.24/2.81	o16:: [CHAR] -->{java.lang.Object...}
7.24/2.81	a18-><-o36
7.24/2.81	a18-><-o35
7.24/2.81	a18-><-o16
7.24/2.81	a18-><-o15
7.24/2.81	YES:  (JL1)
7.24/2.81	7:<simple.middle.Main.main||6: load ADDR args||args: a18||0>
7.24/2.81		o35!: String(count=1, hash=#, offset=0, value=o36?) -->{java.lang.Object...}
7.24/2.81		a18([java.lang.String...]): {o15, o35} -->{java.lang.Object...}
7.24/2.81		o15!: String(count=0, hash=#, offset=0, value=o16?) -->{java.lang.Object...}
7.24/2.81	o36:: [CHAR] -->{java.lang.Object...}
7.24/2.81	o16:: [CHAR] -->{java.lang.Object...}
7.24/2.81	a18-><-o36
7.24/2.81	a18-><-o35
7.24/2.81	a18-><-o16
7.24/2.81	a18-><-o15
7.24/2.81	YES:  (JL1)
7.24/2.81	8:<simple.middle.Main.main||7: push 1|| - ||0, a18>
7.24/2.81		o35!: String(count=1, hash=#, offset=0, value=o36?) -->{java.lang.Object...}
7.24/2.81		a18([java.lang.String...]): {o15, o35} -->{java.lang.Object...}
7.24/2.81		o15!: String(count=0, hash=#, offset=0, value=o16?) -->{java.lang.Object...}
7.24/2.81	o36:: [CHAR] -->{java.lang.Object...}
7.24/2.81	o16:: [CHAR] -->{java.lang.Object...}
7.24/2.81	a18-><-o36
7.24/2.81	a18-><-o35
7.24/2.81	a18-><-o16
7.24/2.81	a18-><-o15
7.24/2.81	YES:  (JL1)
7.24/2.81	9:<simple.middle.Main.main||8: Read ADDR from array|| - ||0, a18, 1>
7.24/2.81		o35!: String(count=1, hash=#, offset=0, value=o36?) -->{java.lang.Object...}
7.24/2.81		a18([java.lang.String...]): {o15, o35} -->{java.lang.Object...}
7.24/2.81		o15!: String(count=0, hash=#, offset=0, value=o16?) -->{java.lang.Object...}
7.24/2.81	o36:: [CHAR] -->{java.lang.Object...}
7.24/2.81	o16:: [CHAR] -->{java.lang.Object...}
7.24/2.81	a18-><-o36
7.24/2.81	a18-><-o35
7.24/2.81	a18-><-o16
7.24/2.81	a18-><-o15
7.24/2.81	YES:  (JL1)
7.24/2.81	10:<simple.middle.Main.main||9: java.lang.String.length()I|| - ||0, o35>
7.24/2.81		o35!: String(count=1, hash=#, offset=0, value=o36?) -->{java.lang.Object...}
7.24/2.81	o36:: [CHAR] -->{java.lang.Object...}
7.24/2.81	YES:  (JL1)
7.24/2.81	11:<java.lang.String.length||0: load ADDR this||this: o35|| ->
7.24/2.81	<simple.middle.Main.main||9: java.lang.String.length|| - ||0>
7.24/2.81		o35!: String(count=1, hash=#, offset=0, value=o36?) -->{java.lang.Object...}
7.24/2.81	o36:: [CHAR] -->{java.lang.Object...}
7.24/2.81	YES:  (JL1)
7.24/2.81	12:<java.lang.String.length||1: Read from count|| - ||o35>
7.24/2.81	<simple.middle.Main.main||9: java.lang.String.length|| - ||0>
7.24/2.81		o35!: String(count=1, hash=#, offset=0, value=o36?) -->{java.lang.Object...}
7.24/2.81	o36:: [CHAR] -->{java.lang.Object...}
7.24/2.81	YES:  (JL1)
7.24/2.81	13:<java.lang.String.length||4: return INT|| - ||1>
7.24/2.81	<simple.middle.Main.main||9: java.lang.String.length|| - ||0>
7.24/2.81	YES:  (JL1)
7.24/2.81	14:<simple.middle.Main.main||12: simple.middle.Middle.middle(II)I|| - ||0, 1>
7.24/2.81	YES:  (JL1)
7.24/2.81	15:<simple.middle.Middle.middle||0: load INT i||i: 0, j: 1|| ->
7.24/2.81	<simple.middle.Main.main||12: simple.middle.Middle.middle|| - || ->
7.24/2.81	YES:  (JL1)
7.24/2.81	Start state of loop: 
7.24/2.81	
7.24/2.81	<simple.middle.Middle.middle||0: load INT i||i: i59, j: i60|| ->
7.24/2.81	[a7(lv_0_0)]
7.24/2.81	<simple.middle.Main.main||12: simple.middle.Middle.middle|| - || ->
7.24/2.81		i59: #
7.24/2.81		i60: [0,+inf)(l3)
7.24/2.81		i15: [2,+inf){0,+inf}
7.24/2.81		a7([java.lang.String...]): length i15 -->{java.lang.Object...}
7.24/2.81	YES:  (JL1)
7.24/2.81	
7.24/2.81	
7.24/2.81	In the loop head node, references [i59, i60] were interesting.
7.24/2.81	
7.24/2.81	All methods calls in the loop body are side-effect free, hence they can be ignored.
7.24/2.81	
7.24/2.81	By SMT, we could prove
7.24/2.81	
7.24/2.81	((0 <= initial_i60 and 2 <= initial_i15) and ((((path1_i65 = (path1_i59 + -1) and path1_i66 = (path1_i60 + 1) and path1_i65 = res_i59 and path1_i66 = res_i60 and path1_i59 = initial_i59 and path1_i60 = initial_i60) and (path1_i59 != path1_i60 and path1_i59 < path1_i60)) or ((path1_i65 = (path1_i59 + -1) and path1_i66 = (path1_i60 + 1) and path1_i65 = res_i59 and path1_i66 = res_i60 and path1_i59 = initial_i59 and path1_i60 = initial_i60) and (path1_i59 != path1_i60 and path1_i59 < path1_i60))) and (((res1_i65 = (res1_i59 + -1) and res1_i66 = (res1_i60 + 1) and res_i59 = res1_i59 and res_i60 = res1_i60) and !(res1_i59 != res1_i60 and res1_i59 < res1_i60)) and ((res1_i65 = (res1_i59 + -1) and res1_i66 = (res1_i60 + 1) and res_i59 = res1_i59 and res_i60 = res1_i60) and !(res1_i59 != res1_i60 and res1_i59 < res1_i60)))))
7.24/2.81	
7.24/2.81	to be UNSAT. Consequently, the loop will not terminate.
7.24/2.81	----------------------------------------
7.24/2.81	
7.24/2.81	(4)
7.24/2.81	NO
7.24/2.86	EOF