/export/starexec/sandbox/solver/bin/starexec_run_standard /export/starexec/sandbox/benchmark/theBenchmark.jar /export/starexec/sandbox/output/output_files


--------------------------------------------------------------------------------


NO
proof of /export/starexec/sandbox/benchmark/theBenchmark.jar
# AProVE Commit ID: 794c25de1cacf0d048858bcd21c9a779e1221865 marcel 20200619 unpublished dirty


termination of the given Bare JBC problem could be disproven:

(0) Bare JBC problem
(1) BareJBCToJBCProof [EQUIVALENT, 96 ms]
(2) JBC problem
(3) JBCNonTerm [COMPLETE, 285 ms]
(4) NO


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(0)
Obligation:
need to prove termination of the following 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) BareJBCToJBCProof (EQUIVALENT)
initialized classpath
----------------------------------------

(2)
Obligation:
need to prove termination of the following 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--;
			}
		}
	}
}



----------------------------------------

(3) JBCNonTerm (COMPLETE)
Reached a loop using the following run: 

0:<simple.whileIncrPart.Main.main||0: load ADDR args||args: a19|| ->
	a19([java.lang.String...]): length 4 -->{java.lang.Object...}
YES:  (JL1)
1:<simple.whileIncrPart.Main.main||1: arraylength|| - ||a19>
	a19([java.lang.String...]): length 4 -->{java.lang.Object...}
YES:  (JL1)
2:<simple.whileIncrPart.Main.main||2: simple.whileIncrPart.WhileIncrPart.increase(I)V|| - ||4>
YES:  (JL1)
3:<simple.whileIncrPart.WhileIncrPart.increase||0: load INT i||i: 4|| ->
<simple.whileIncrPart.Main.main||2: simple.whileIncrPart.WhileIncrPart.increase|| - || ->
YES:  (JL1)
Start state of loop: 

<simple.whileIncrPart.WhileIncrPart.increase||0: load INT i||i: i45|| ->
[a9(lv_0_0)]
<simple.whileIncrPart.Main.main||2: simple.whileIncrPart.WhileIncrPart.increase|| - || ->
	i45: [0,+inf)(l1)
	i46: [0,+inf)(l2)
	a9([java.lang.String...]): length i46 -->{java.lang.Object...}
YES:  (JL1)


In the loop head node, references [i45] were interesting.

All methods calls in the loop body are side-effect free, hence they can be ignored.

By SMT, we could prove

((0 <= initial_i45 and 0 <= initial_i46) and (((path2_i45 = path2_i77 and path2_i77 = path2_i79 and path2_i83 = (path2_i79 + 1) and path2_i83 = res_i45 and path2_i45 = initial_i45) and (path2_i77 > 0 and T and 3 = 3 and path2_i79 > 3)) and ((res2_i45 = res2_i77 and res2_i77 = res2_i79 and res2_i83 = (res2_i79 + 1) and res_i45 = res2_i45) and !(res2_i77 > 0 and T and 3 = 3 and res2_i79 > 3))))

to be UNSAT. Consequently, the loop will not terminate.
----------------------------------------

(4)
NO