Java Bytec 64199 pair #381919277

details

property	value
status	complete
benchmark	upAndDownIneq_rec.jar
ran by	Akihisa Yamada
cpu timeout	1200 seconds
wallclock timeout	300 seconds
memory limit	137438953472 bytes
execution host	n046.star.cs.uiowa.edu
space	Julia_12_recursive

run statistics

property	value
solver	AProVE
configuration	standard
runtime (wallclock)	3.12694120407 seconds
cpu usage	8.429866032
max memory	6.00174592E8

stage attributes

key	value
output-size	5211
starexec-result	NO

output

/export/starexec/sandbox2/solver/bin/starexec_run_standard /export/starexec/sandbox2/benchmark/theBenchmark.jar /export/starexec/sandbox2/output/output_files


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


NO
proof of /export/starexec/sandbox2/benchmark/theBenchmark.jar
# AProVE Commit ID: 48fb2092695e11cc9f56e44b17a92a5f88ffb256 marcel 20180622 unpublished dirty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, 480 ms]
(4) NO


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

(0)
Obligation:
need to prove termination of the following program:
public class UpAndDownIneq {
	
    public static void upAndDown(int i, int up) {
	while (0 <= i && i <= 10) {
	    if (i >= 10) up = 0;
	    if (i <= 0) up = 1;
	    if (up >= 1) i++;
	    else i--;
	    upAndDown(i, up);
	}
    }

    public static void main(String[] args) {
	upAndDown(args.length, 0);
    }
}



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

(1) BareJBCToJBCProof (EQUIVALENT)
initialized classpath
----------------------------------------

(2)
Obligation:
need to prove termination of the following program:
public class UpAndDownIneq {
	
    public static void upAndDown(int i, int up) {
	while (0 <= i && i <= 10) {
	    if (i >= 10) up = 0;
	    if (i <= 0) up = 1;
	    if (up >= 1) i++;
	    else i--;
	    upAndDown(i, up);
	}
    }

    public static void main(String[] args) {
	upAndDown(args.length, 0);
    }
}



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

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

0:<UpAndDownIneq.main||0: load ADDR #0||#0: a2|| ->
	a2([java.lang.String...]): length 1 -->{java.lang.Object...}
YES:  (JL1)
1:<UpAndDownIneq.main||1: arraylength|| - ||a2>
	a2([java.lang.String...]): length 1 -->{java.lang.Object...}
YES:  (JL1)
2:<UpAndDownIneq.main||2: push 0|| - ||1>
YES:  (JL1)
3:<UpAndDownIneq.main||3: UpAndDownIneq.upAndDown(II)V|| - ||1, 0>
YES:  (JL1)
4:<UpAndDownIneq.upAndDown||0: push 0||#0: 1, #1: 0|| ->
YES:  (JL1)
Start state of loop: 

[i41(lv_0_0), i42(lv_0_1)]
<UpAndDownIneq.upAndDown||0: push 0||#0: i41, #1: i43|| ->
	i41: [0,+inf)(l1)
	i42: [0,1](1,1)
	i43: [0,1](1,1)
YES:  (JL1)


In the loop head node, references [i41, i42, i43] were interesting.

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actions all output return to Java Bytec 64199