./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-restricted-15/GCD-1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86543e55-d62e-44c3-91ee-bee1c43190e2/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86543e55-d62e-44c3-91ee-bee1c43190e2/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86543e55-d62e-44c3-91ee-bee1c43190e2/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86543e55-d62e-44c3-91ee-bee1c43190e2/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-restricted-15/GCD-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86543e55-d62e-44c3-91ee-bee1c43190e2/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86543e55-d62e-44c3-91ee-bee1c43190e2/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 5f52b905489768d11946f99b46b2e235c97efbb56a51bc32b8b274637f7dd5d8 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:15:03,982 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:15:04,050 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86543e55-d62e-44c3-91ee-bee1c43190e2/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Termination-64bit-Automizer_Default.epf [2023-11-06 22:15:04,056 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:15:04,057 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:15:04,082 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:15:04,083 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:15:04,083 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:15:04,084 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:15:04,085 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:15:04,086 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:15:04,086 INFO L151 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2023-11-06 22:15:04,087 INFO L153 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2023-11-06 22:15:04,088 INFO L153 SettingsManager]: * Use old map elimination=false [2023-11-06 22:15:04,088 INFO L153 SettingsManager]: * Use external solver (rank synthesis)=false [2023-11-06 22:15:04,089 INFO L153 SettingsManager]: * Use only trivial implications for array writes=true [2023-11-06 22:15:04,089 INFO L153 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2023-11-06 22:15:04,090 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:15:04,091 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2023-11-06 22:15:04,091 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:15:04,092 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:15:04,093 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2023-11-06 22:15:04,093 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2023-11-06 22:15:04,094 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2023-11-06 22:15:04,094 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:15:04,095 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:15:04,095 INFO L153 SettingsManager]: * Assume nondeterminstic values are in range=false [2023-11-06 22:15:04,096 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:15:04,096 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:15:04,097 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:15:04,097 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:15:04,098 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:15:04,099 INFO L151 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2023-11-06 22:15:04,099 INFO L153 SettingsManager]: * TransformationType=MODULO_NEIGHBOR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86543e55-d62e-44c3-91ee-bee1c43190e2/bin/uautomizer-verify-WvqO1wxjHP/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86543e55-d62e-44c3-91ee-bee1c43190e2/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5f52b905489768d11946f99b46b2e235c97efbb56a51bc32b8b274637f7dd5d8 [2023-11-06 22:15:04,428 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:15:04,459 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:15:04,462 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:15:04,463 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:15:04,463 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:15:04,465 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86543e55-d62e-44c3-91ee-bee1c43190e2/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/termination-restricted-15/GCD-1.c [2023-11-06 22:15:07,693 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:15:07,924 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:15:07,925 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86543e55-d62e-44c3-91ee-bee1c43190e2/sv-benchmarks/c/termination-restricted-15/GCD-1.c [2023-11-06 22:15:07,939 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86543e55-d62e-44c3-91ee-bee1c43190e2/bin/uautomizer-verify-WvqO1wxjHP/data/d24ae6dd5/fb27838360aa4604b96f591889549060/FLAG4abc94489 [2023-11-06 22:15:07,961 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86543e55-d62e-44c3-91ee-bee1c43190e2/bin/uautomizer-verify-WvqO1wxjHP/data/d24ae6dd5/fb27838360aa4604b96f591889549060 [2023-11-06 22:15:07,968 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:15:07,972 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:15:07,975 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:15:07,975 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:15:07,981 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:15:07,982 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:15:07" (1/1) ... [2023-11-06 22:15:07,984 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3345ef64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:15:07, skipping insertion in model container [2023-11-06 22:15:07,984 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:15:07" (1/1) ... [2023-11-06 22:15:08,007 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:15:08,210 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:15:08,217 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:15:08,235 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:15:08,250 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:15:08,250 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:15:08 WrapperNode [2023-11-06 22:15:08,251 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:15:08,252 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:15:08,253 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:15:08,253 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:15:08,262 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:15:08" (1/1) ... [2023-11-06 22:15:08,267 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:15:08" (1/1) ... [2023-11-06 22:15:08,286 INFO L138 Inliner]: procedures = 4, calls = 2, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 31 [2023-11-06 22:15:08,287 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:15:08,287 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:15:08,288 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:15:08,288 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:15:08,298 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:15:08" (1/1) ... [2023-11-06 22:15:08,299 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:15:08" (1/1) ... [2023-11-06 22:15:08,301 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:15:08" (1/1) ... [2023-11-06 22:15:08,301 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:15:08" (1/1) ... [2023-11-06 22:15:08,305 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:15:08" (1/1) ... [2023-11-06 22:15:08,309 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:15:08" (1/1) ... [2023-11-06 22:15:08,311 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:15:08" (1/1) ... [2023-11-06 22:15:08,313 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:15:08" (1/1) ... [2023-11-06 22:15:08,320 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:15:08,322 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:15:08,322 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:15:08,322 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:15:08,323 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:15:08" (1/1) ... [2023-11-06 22:15:08,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-06 22:15:08,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86543e55-d62e-44c3-91ee-bee1c43190e2/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:15:08,359 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86543e55-d62e-44c3-91ee-bee1c43190e2/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-06 22:15:08,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86543e55-d62e-44c3-91ee-bee1c43190e2/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2023-11-06 22:15:08,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:15:08,402 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:15:08,496 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:15:08,498 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:15:08,568 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:15:08,574 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:15:08,575 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-06 22:15:08,577 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:15:08 BoogieIcfgContainer [2023-11-06 22:15:08,577 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:15:08,578 INFO L112 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2023-11-06 22:15:08,578 INFO L270 PluginConnector]: Initializing BuchiAutomizer... [2023-11-06 22:15:08,583 INFO L274 PluginConnector]: BuchiAutomizer initialized [2023-11-06 22:15:08,584 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-11-06 22:15:08,584 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 06.11 10:15:07" (1/3) ... [2023-11-06 22:15:08,586 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@b7e8b85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 06.11 10:15:08, skipping insertion in model container [2023-11-06 22:15:08,586 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-11-06 22:15:08,586 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:15:08" (2/3) ... [2023-11-06 22:15:08,587 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@b7e8b85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 06.11 10:15:08, skipping insertion in model container [2023-11-06 22:15:08,587 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-11-06 22:15:08,587 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:15:08" (3/3) ... [2023-11-06 22:15:08,589 INFO L332 chiAutomizerObserver]: Analyzing ICFG GCD-1.c [2023-11-06 22:15:08,664 INFO L303 stractBuchiCegarLoop]: Interprodecural is true [2023-11-06 22:15:08,664 INFO L304 stractBuchiCegarLoop]: Hoare is false [2023-11-06 22:15:08,665 INFO L305 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2023-11-06 22:15:08,665 INFO L306 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2023-11-06 22:15:08,665 INFO L307 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2023-11-06 22:15:08,665 INFO L308 stractBuchiCegarLoop]: Difference is false [2023-11-06 22:15:08,666 INFO L309 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2023-11-06 22:15:08,666 INFO L313 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2023-11-06 22:15:08,672 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:08,692 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2023-11-06 22:15:08,694 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-06 22:15:08,694 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-06 22:15:08,720 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2023-11-06 22:15:08,720 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2023-11-06 22:15:08,721 INFO L335 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2023-11-06 22:15:08,722 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:15:08,724 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2023-11-06 22:15:08,726 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-06 22:15:08,726 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-06 22:15:08,727 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2023-11-06 22:15:08,727 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2023-11-06 22:15:08,739 INFO L748 eck$LassoCheckResult]: Stem: 7#$Ultimate##0true assume { :begin_inline_ULTIMATE.init } true; 10#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~nondet1#1, main_~x~0#1, main_~y~0#1, main_~tmp~0#1, main_~xtmp~0#1;havoc main_~x~0#1;havoc main_~y~0#1;havoc main_~tmp~0#1;havoc main_~xtmp~0#1;havoc main_#t~nondet0#1;main_~x~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;havoc main_#t~nondet1#1;main_~y~0#1 := main_#t~nondet1#1;havoc main_#t~nondet1#1; 6#L13-2true [2023-11-06 22:15:08,741 INFO L750 eck$LassoCheckResult]: Loop: 6#L13-2true assume !!(0 != main_~y~0#1);main_~tmp~0#1 := main_~y~0#1;main_~xtmp~0#1 := main_~x~0#1; 3#L17true assume main_~x~0#1 <= 0 || main_~y~0#1 <= 0;main_~y~0#1 := 0; 9#L23-3true main_~y~0#1 := main_~xtmp~0#1;main_~x~0#1 := main_~tmp~0#1; 6#L13-2true [2023-11-06 22:15:08,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:15:08,753 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2023-11-06 22:15:08,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:15:08,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012743207] [2023-11-06 22:15:08,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:15:08,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:15:08,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:15:08,860 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:15:08,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:15:08,892 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:15:08,895 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:15:08,895 INFO L85 PathProgramCache]: Analyzing trace with hash 40830, now seen corresponding path program 1 times [2023-11-06 22:15:08,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:15:08,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445119011] [2023-11-06 22:15:08,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:15:08,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:15:08,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:15:08,925 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:15:08,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:15:08,946 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:15:08,951 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:15:08,952 INFO L85 PathProgramCache]: Analyzing trace with hash 28699772, now seen corresponding path program 1 times [2023-11-06 22:15:08,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:15:08,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883870629] [2023-11-06 22:15:08,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:15:08,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:15:08,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:15:08,994 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:15:09,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:15:09,020 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:15:09,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:15:09,225 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:15:09,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:15:09,247 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 06.11 10:15:09 BoogieIcfgContainer [2023-11-06 22:15:09,247 INFO L131 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2023-11-06 22:15:09,247 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-06 22:15:09,248 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-06 22:15:09,248 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-06 22:15:09,248 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:15:08" (3/4) ... [2023-11-06 22:15:09,250 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2023-11-06 22:15:09,287 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86543e55-d62e-44c3-91ee-bee1c43190e2/bin/uautomizer-verify-WvqO1wxjHP/witness.graphml.graphml [2023-11-06 22:15:09,287 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-06 22:15:09,289 INFO L158 Benchmark]: Toolchain (without parser) took 1316.00ms. Allocated memory is still 138.4MB. Free memory was 95.1MB in the beginning and 90.8MB in the end (delta: 4.3MB). Peak memory consumption was 6.6MB. Max. memory is 16.1GB. [2023-11-06 22:15:09,289 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 100.7MB. Free memory is still 51.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 22:15:09,290 INFO L158 Benchmark]: CACSL2BoogieTranslator took 276.61ms. Allocated memory is still 138.4MB. Free memory was 94.9MB in the beginning and 85.6MB in the end (delta: 9.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-06 22:15:09,290 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.38ms. Allocated memory is still 138.4MB. Free memory was 85.6MB in the beginning and 84.2MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 22:15:09,291 INFO L158 Benchmark]: Boogie Preprocessor took 33.27ms. Allocated memory is still 138.4MB. Free memory was 84.1MB in the beginning and 83.0MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-06 22:15:09,291 INFO L158 Benchmark]: RCFGBuilder took 255.52ms. Allocated memory is still 138.4MB. Free memory was 83.0MB in the beginning and 74.7MB in the end (delta: 8.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-06 22:15:09,292 INFO L158 Benchmark]: BuchiAutomizer took 668.60ms. Allocated memory is still 138.4MB. Free memory was 74.4MB in the beginning and 92.4MB in the end (delta: -18.0MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 22:15:09,293 INFO L158 Benchmark]: Witness Printer took 39.58ms. Allocated memory is still 138.4MB. Free memory was 92.4MB in the beginning and 90.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-06 22:15:09,296 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 100.7MB. Free memory is still 51.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 276.61ms. Allocated memory is still 138.4MB. Free memory was 94.9MB in the beginning and 85.6MB in the end (delta: 9.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.38ms. Allocated memory is still 138.4MB. Free memory was 85.6MB in the beginning and 84.2MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 33.27ms. Allocated memory is still 138.4MB. Free memory was 84.1MB in the beginning and 83.0MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 255.52ms. Allocated memory is still 138.4MB. Free memory was 83.0MB in the beginning and 74.7MB in the end (delta: 8.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * BuchiAutomizer took 668.60ms. Allocated memory is still 138.4MB. Free memory was 74.4MB in the beginning and 92.4MB in the end (delta: -18.0MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 39.58ms. Allocated memory is still 138.4MB. Free memory was 92.4MB in the beginning and 90.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Trivial decomposition into one nonterminating module. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 0.6s and 1 iterations. TraceHistogramMax:1. Analysis of lassos took 0.5s. Construction of modules took 0.0s. Büchi inclusion checks took 0.0s. Highest rank in rank-based complementation 0. Minimization of det autom 0. Minimization of nondet autom 0. Automata minimization No data available. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had -1 states and ocurred in iteration -1. Nontrivial modules had stage [0, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: LassoAnalysisResults: nont1 unkn0 SFLI0 SFLT0 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: LassoTerminationAnalysisBenchmarks: not availableLassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 0 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 0 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.0s InitialAbstractionConstructionTime: 0.0s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - LassoShapedNonTerminationArgument [Line: 13]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite program execution. Stem: [L6] int x; [L7] int y; [L8] int tmp; [L9] int xtmp; [L10] x = __VERIFIER_nondet_int() [L11] y = __VERIFIER_nondet_int() Loop: [L13] COND TRUE y != 0 [L14] tmp = y [L15] xtmp = x [L17] COND TRUE x <= 0 || y <= 0 [L18] y = 0 [L29] y = xtmp [L30] x = tmp End of lasso representation. - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 13]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L6] int x; [L7] int y; [L8] int tmp; [L9] int xtmp; [L10] x = __VERIFIER_nondet_int() [L11] y = __VERIFIER_nondet_int() Loop: [L13] COND TRUE y != 0 [L14] tmp = y [L15] xtmp = x [L17] COND TRUE x <= 0 || y <= 0 [L18] y = 0 [L29] y = xtmp [L30] x = tmp End of lasso representation. RESULT: Ultimate proved your program to be incorrect! [2023-11-06 22:15:09,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86543e55-d62e-44c3-91ee-bee1c43190e2/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(TERM)