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Java Bytec 64199 pair #381919482
details
property
value
status
complete
benchmark
trueDiv_rec.jar
ran by
Akihisa Yamada
cpu timeout
1200 seconds
wallclock timeout
300 seconds
memory limit
137438953472 bytes
execution host
n042.star.cs.uiowa.edu
space
Julia_12_recursive
run statistics
property
value
solver
AProVE
configuration
standard
runtime (wallclock)
2.26542210579 seconds
cpu usage
5.815236297
max memory
5.22133504E8
stage attributes
key
value
output-size
2605
starexec-result
NO
output
/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# AProVE Commit ID: 48fb2092695e11cc9f56e44b17a92a5f88ffb256 marcel 20180622 unpublished dirty termination of the given Bare JBC problem could be disproven: (0) Bare JBC problem (1) BareJBCToJBCProof [EQUIVALENT, 96 ms] (2) JBC problem (3)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, 195 ms] (4) NO ---------------------------------------- (0) Obligation: need to prove termination of the following program: public class TrueDiv { public static void loop(int i) { if (i <= 0) i--; else i++; loop(i); } public static void main(String[] args) { loop(args.length); } } ---------------------------------------- (1) BareJBCToJBCProof (EQUIVALENT) initialized classpath ---------------------------------------- (2) Obligation: need to prove termination of the following program: public class TrueDiv { public static void loop(int i) { if (i <= 0) i--; else i++; loop(i); } public static void main(String[] args) { loop(args.length); } } ---------------------------------------- (3) JBCNonTerm (COMPLETE) Reached a loop using the following run: 0:<TrueDiv.main||0: load ADDR #0||#0: a2|| -> a2([java.lang.String...]): length 1 -->{java.lang.Object...} YES: (JL1) 1:<TrueDiv.main||1: arraylength|| - ||a2> a2([java.lang.String...]): length 1 -->{java.lang.Object...} YES: (JL1) 2:<TrueDiv.main||2: TrueDiv.loop(I)V|| - ||1> YES: (JL1) 3:<TrueDiv.loop||0: load INT #0||#0: 1|| -> YES: (JL1) Start state of loop: [i90(lv_0_0)] <TrueDiv.loop||0: load INT #0||#0: i90|| -> i90: # YES: (JL1) In the loop head node, references [i90] were interesting. All methods calls in the loop body are side-effect free, hence they can be ignored. By SMT, we could prove (T and ((((path1_i90 = path1_i106 and path1_i109 = (path1_i106 + 1) and path1_i109 = res_i90 and path1_i90 = initial_i90) and path1_i106 > 0) or ((path2_i90 = path2_i105 and path2_i108 = (path2_i105 + -1) and path2_i108 = res_i90 and path2_i90 = initial_i90) and path2_i105 <= 0)) and (((res1_i90 = res1_i106 and res1_i109 = (res1_i106 + 1) and res_i90 = res1_i90) and !res1_i106 > 0) and ((res2_i90 = res2_i105 and res2_i108 = (res2_i105 + -1) and res_i90 = res2_i90) and !res2_i105 <= 0)))) to be UNSAT. Consequently, the loop will not terminate. ---------------------------------------- (4) NO
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