./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-bwb/not-03-false.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c86950-55b0-4d9a-a236-ec62cbfc1284/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c86950-55b0-4d9a-a236-ec62cbfc1284/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c86950-55b0-4d9a-a236-ec62cbfc1284/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c86950-55b0-4d9a-a236-ec62cbfc1284/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-bwb/not-03-false.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c86950-55b0-4d9a-a236-ec62cbfc1284/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c86950-55b0-4d9a-a236-ec62cbfc1284/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --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 bfe3774f338fff1efd12c2f95aa173e1ad8cef8d4f5d724dd7b77b773a2449e9 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 08:01:11,259 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 08:01:11,376 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c86950-55b0-4d9a-a236-ec62cbfc1284/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Termination-64bit-Automizer_Default.epf [2023-11-19 08:01:11,388 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 08:01:11,389 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 08:01:11,418 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 08:01:11,419 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 08:01:11,420 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 08:01:11,421 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 08:01:11,421 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 08:01:11,422 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 08:01:11,423 INFO L151 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2023-11-19 08:01:11,423 INFO L153 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2023-11-19 08:01:11,424 INFO L153 SettingsManager]: * Use old map elimination=false [2023-11-19 08:01:11,424 INFO L153 SettingsManager]: * Use external solver (rank synthesis)=false [2023-11-19 08:01:11,425 INFO L153 SettingsManager]: * Use only trivial implications for array writes=true [2023-11-19 08:01:11,426 INFO L153 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2023-11-19 08:01:11,426 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 08:01:11,427 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2023-11-19 08:01:11,428 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 08:01:11,428 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 08:01:11,429 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2023-11-19 08:01:11,430 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2023-11-19 08:01:11,430 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2023-11-19 08:01:11,431 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 08:01:11,432 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 08:01:11,432 INFO L153 SettingsManager]: * Assume nondeterminstic values are in range=false [2023-11-19 08:01:11,433 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 08:01:11,433 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 08:01:11,434 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 08:01:11,434 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 08:01:11,435 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 08:01:11,436 INFO L151 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2023-11-19 08:01:11,436 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_36c86950-55b0-4d9a-a236-ec62cbfc1284/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c86950-55b0-4d9a-a236-ec62cbfc1284/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bfe3774f338fff1efd12c2f95aa173e1ad8cef8d4f5d724dd7b77b773a2449e9 [2023-11-19 08:01:11,691 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 08:01:11,717 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 08:01:11,720 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 08:01:11,721 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 08:01:11,722 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 08:01:11,723 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c86950-55b0-4d9a-a236-ec62cbfc1284/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/termination-bwb/not-03-false.c [2023-11-19 08:01:14,772 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 08:01:15,040 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 08:01:15,044 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c86950-55b0-4d9a-a236-ec62cbfc1284/sv-benchmarks/c/termination-bwb/not-03-false.c [2023-11-19 08:01:15,053 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c86950-55b0-4d9a-a236-ec62cbfc1284/bin/uautomizer-verify-uCwYo4JHxu/data/bdd9dd627/c15e5d651d3044c0834804bd469012be/FLAG9bd3dfec0 [2023-11-19 08:01:15,068 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c86950-55b0-4d9a-a236-ec62cbfc1284/bin/uautomizer-verify-uCwYo4JHxu/data/bdd9dd627/c15e5d651d3044c0834804bd469012be [2023-11-19 08:01:15,071 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 08:01:15,073 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 08:01:15,074 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 08:01:15,074 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 08:01:15,081 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 08:01:15,083 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:01:15" (1/1) ... [2023-11-19 08:01:15,085 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2708a298 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:15, skipping insertion in model container [2023-11-19 08:01:15,086 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:01:15" (1/1) ... [2023-11-19 08:01:15,103 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 08:01:15,245 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:01:15,252 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 08:01:15,269 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:01:15,286 INFO L206 MainTranslator]: Completed translation [2023-11-19 08:01:15,287 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:15 WrapperNode [2023-11-19 08:01:15,287 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 08:01:15,289 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 08:01:15,289 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 08:01:15,289 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 08:01:15,297 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:15" (1/1) ... [2023-11-19 08:01:15,302 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:15" (1/1) ... [2023-11-19 08:01:15,319 INFO L138 Inliner]: procedures = 4, calls = 2, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2023-11-19 08:01:15,320 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 08:01:15,321 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 08:01:15,321 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 08:01:15,321 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 08:01:15,330 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:15" (1/1) ... [2023-11-19 08:01:15,331 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:15" (1/1) ... [2023-11-19 08:01:15,331 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:15" (1/1) ... [2023-11-19 08:01:15,332 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:15" (1/1) ... [2023-11-19 08:01:15,333 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:15" (1/1) ... [2023-11-19 08:01:15,337 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:15" (1/1) ... [2023-11-19 08:01:15,338 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:15" (1/1) ... [2023-11-19 08:01:15,339 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:15" (1/1) ... [2023-11-19 08:01:15,340 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 08:01:15,341 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 08:01:15,341 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 08:01:15,342 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 08:01:15,343 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:15" (1/1) ... [2023-11-19 08:01:15,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-11-19 08:01:15,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c86950-55b0-4d9a-a236-ec62cbfc1284/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:15,376 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c86950-55b0-4d9a-a236-ec62cbfc1284/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-11-19 08:01:15,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c86950-55b0-4d9a-a236-ec62cbfc1284/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2023-11-19 08:01:15,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 08:01:15,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 08:01:15,501 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 08:01:15,505 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 08:01:15,632 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 08:01:15,640 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 08:01:15,640 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 08:01:15,643 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:01:15 BoogieIcfgContainer [2023-11-19 08:01:15,644 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 08:01:15,645 INFO L112 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2023-11-19 08:01:15,645 INFO L270 PluginConnector]: Initializing BuchiAutomizer... [2023-11-19 08:01:15,650 INFO L274 PluginConnector]: BuchiAutomizer initialized [2023-11-19 08:01:15,651 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-11-19 08:01:15,651 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 19.11 08:01:15" (1/3) ... [2023-11-19 08:01:15,653 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@2192796f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.11 08:01:15, skipping insertion in model container [2023-11-19 08:01:15,653 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-11-19 08:01:15,653 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:15" (2/3) ... [2023-11-19 08:01:15,654 INFO L204 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@2192796f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.11 08:01:15, skipping insertion in model container [2023-11-19 08:01:15,654 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-11-19 08:01:15,654 INFO L184 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:01:15" (3/3) ... [2023-11-19 08:01:15,656 INFO L332 chiAutomizerObserver]: Analyzing ICFG not-03-false.c [2023-11-19 08:01:15,720 INFO L303 stractBuchiCegarLoop]: Interprodecural is true [2023-11-19 08:01:15,720 INFO L304 stractBuchiCegarLoop]: Hoare is false [2023-11-19 08:01:15,720 INFO L305 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2023-11-19 08:01:15,720 INFO L306 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2023-11-19 08:01:15,721 INFO L307 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2023-11-19 08:01:15,721 INFO L308 stractBuchiCegarLoop]: Difference is false [2023-11-19 08:01:15,721 INFO L309 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2023-11-19 08:01:15,721 INFO L313 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2023-11-19 08:01:15,727 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 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) [2023-11-19 08:01:15,751 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2023-11-19 08:01:15,751 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-19 08:01:15,752 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-19 08:01:15,757 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2023-11-19 08:01:15,758 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1] [2023-11-19 08:01:15,758 INFO L335 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2023-11-19 08:01:15,758 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 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) [2023-11-19 08:01:15,760 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2023-11-19 08:01:15,761 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-19 08:01:15,761 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-19 08:01:15,762 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2023-11-19 08:01:15,762 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1] [2023-11-19 08:01:15,771 INFO L748 eck$LassoCheckResult]: Stem: 6#$Ultimate##0true assume { :begin_inline_ULTIMATE.init } true; 7#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~nondet1#1, main_~a~0#1, main_~x~0#1, main_~y~0#1;havoc main_~a~0#1;havoc main_~x~0#1;havoc main_~y~0#1;havoc main_#t~nondet0#1;main_~x~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;havoc main_#t~nondet1#1;main_~y~0#1 := main_#t~nondet1#1;havoc main_#t~nondet1#1; 2#L19-2true [2023-11-19 08:01:15,771 INFO L750 eck$LassoCheckResult]: Loop: 2#L19-2true assume !!(main_~x~0#1 > 0 && main_~y~0#1 < 0); 8#L19true assume !(main_~x~0#1 > main_~y~0#1);main_~x~0#1 := main_~x~0#1 - 1; 2#L19-2true [2023-11-19 08:01:15,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:15,785 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2023-11-19 08:01:15,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:15,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137567521] [2023-11-19 08:01:15,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:15,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:15,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:01:15,874 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 08:01:15,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:01:15,896 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 08:01:15,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:15,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1318, now seen corresponding path program 1 times [2023-11-19 08:01:15,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:15,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337299161] [2023-11-19 08:01:15,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:15,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:15,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:15,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:15,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:15,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337299161] [2023-11-19 08:01:15,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337299161] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:01:15,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:01:15,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:01:15,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345071045] [2023-11-19 08:01:15,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:01:16,001 INFO L765 eck$LassoCheckResult]: loop already infeasible [2023-11-19 08:01:16,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:16,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:01:16,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:01:16,040 INFO L87 Difference]: Start difference. First operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 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) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2023-11-19 08:01:16,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:01:16,062 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2023-11-19 08:01:16,064 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 8 states and 8 transitions. [2023-11-19 08:01:16,065 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2023-11-19 08:01:16,068 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 8 states to 4 states and 4 transitions. [2023-11-19 08:01:16,070 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 4 [2023-11-19 08:01:16,070 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 4 [2023-11-19 08:01:16,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 4 transitions. [2023-11-19 08:01:16,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:01:16,071 INFO L218 hiAutomatonCegarLoop]: Abstraction has 4 states and 4 transitions. [2023-11-19 08:01:16,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4 states and 4 transitions. [2023-11-19 08:01:16,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4 to 4. [2023-11-19 08:01:16,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2023-11-19 08:01:16,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 4 transitions. [2023-11-19 08:01:16,110 INFO L240 hiAutomatonCegarLoop]: Abstraction has 4 states and 4 transitions. [2023-11-19 08:01:16,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:01:16,119 INFO L428 stractBuchiCegarLoop]: Abstraction has 4 states and 4 transitions. [2023-11-19 08:01:16,120 INFO L335 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2023-11-19 08:01:16,120 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 4 states and 4 transitions. [2023-11-19 08:01:16,121 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2023-11-19 08:01:16,121 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-11-19 08:01:16,122 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-11-19 08:01:16,122 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2023-11-19 08:01:16,122 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1] [2023-11-19 08:01:16,123 INFO L748 eck$LassoCheckResult]: Stem: 27#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 28#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~nondet1#1, main_~a~0#1, main_~x~0#1, main_~y~0#1;havoc main_~a~0#1;havoc main_~x~0#1;havoc main_~y~0#1;havoc main_#t~nondet0#1;main_~x~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;havoc main_#t~nondet1#1;main_~y~0#1 := main_#t~nondet1#1;havoc main_#t~nondet1#1; 25#L19-2 [2023-11-19 08:01:16,124 INFO L750 eck$LassoCheckResult]: Loop: 25#L19-2 assume !!(main_~x~0#1 > 0 && main_~y~0#1 < 0); 26#L19 assume main_~x~0#1 > main_~y~0#1;main_~y~0#1 := -1 - main_~x~0#1; 25#L19-2 [2023-11-19 08:01:16,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:16,127 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 2 times [2023-11-19 08:01:16,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:16,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690436666] [2023-11-19 08:01:16,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:16,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:16,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:01:16,140 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 08:01:16,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:01:16,151 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 08:01:16,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:16,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1316, now seen corresponding path program 1 times [2023-11-19 08:01:16,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:16,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069051849] [2023-11-19 08:01:16,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:16,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:16,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:01:16,166 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 08:01:16,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:01:16,172 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 08:01:16,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:16,173 INFO L85 PathProgramCache]: Analyzing trace with hash 925798, now seen corresponding path program 1 times [2023-11-19 08:01:16,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:16,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686031477] [2023-11-19 08:01:16,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:16,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:16,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:01:16,181 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 08:01:16,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:01:16,187 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 08:01:16,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:01:16,305 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 08:01:16,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:01:16,332 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 19.11 08:01:16 BoogieIcfgContainer [2023-11-19 08:01:16,332 INFO L131 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2023-11-19 08:01:16,333 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-19 08:01:16,333 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-19 08:01:16,333 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-19 08:01:16,334 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:01:15" (3/4) ... [2023-11-19 08:01:16,336 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2023-11-19 08:01:16,403 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c86950-55b0-4d9a-a236-ec62cbfc1284/bin/uautomizer-verify-uCwYo4JHxu/witness.graphml [2023-11-19 08:01:16,403 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-19 08:01:16,404 INFO L158 Benchmark]: Toolchain (without parser) took 1331.32ms. Allocated memory was 165.7MB in the beginning and 203.4MB in the end (delta: 37.7MB). Free memory was 134.3MB in the beginning and 173.9MB in the end (delta: -39.6MB). Peak memory consumption was 5.2MB. Max. memory is 16.1GB. [2023-11-19 08:01:16,405 INFO L158 Benchmark]: CDTParser took 0.51ms. Allocated memory is still 165.7MB. Free memory is still 122.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 08:01:16,406 INFO L158 Benchmark]: CACSL2BoogieTranslator took 213.77ms. Allocated memory is still 165.7MB. Free memory was 134.0MB in the beginning and 124.6MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-19 08:01:16,406 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.40ms. Allocated memory is still 165.7MB. Free memory was 124.6MB in the beginning and 123.3MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-19 08:01:16,407 INFO L158 Benchmark]: Boogie Preprocessor took 19.91ms. Allocated memory is still 165.7MB. Free memory was 123.3MB in the beginning and 122.3MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 08:01:16,407 INFO L158 Benchmark]: RCFGBuilder took 302.79ms. Allocated memory is still 165.7MB. Free memory was 122.3MB in the beginning and 113.9MB in the end (delta: 8.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-19 08:01:16,408 INFO L158 Benchmark]: BuchiAutomizer took 687.08ms. Allocated memory is still 165.7MB. Free memory was 113.9MB in the beginning and 135.1MB in the end (delta: -21.2MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 08:01:16,409 INFO L158 Benchmark]: Witness Printer took 70.41ms. Allocated memory was 165.7MB in the beginning and 203.4MB in the end (delta: 37.7MB). Free memory was 135.0MB in the beginning and 173.9MB in the end (delta: -38.8MB). Peak memory consumption was 3.2MB. Max. memory is 16.1GB. [2023-11-19 08:01:16,413 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.51ms. Allocated memory is still 165.7MB. Free memory is still 122.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 213.77ms. Allocated memory is still 165.7MB. Free memory was 134.0MB in the beginning and 124.6MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 31.40ms. Allocated memory is still 165.7MB. Free memory was 124.6MB in the beginning and 123.3MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 19.91ms. Allocated memory is still 165.7MB. Free memory was 123.3MB in the beginning and 122.3MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 302.79ms. Allocated memory is still 165.7MB. Free memory was 122.3MB in the beginning and 113.9MB in the end (delta: 8.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * BuchiAutomizer took 687.08ms. Allocated memory is still 165.7MB. Free memory was 113.9MB in the beginning and 135.1MB in the end (delta: -21.2MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 70.41ms. Allocated memory was 165.7MB in the beginning and 203.4MB in the end (delta: 37.7MB). Free memory was 135.0MB in the beginning and 173.9MB in the end (delta: -38.8MB). Peak memory consumption was 3.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 1 terminating modules (1 trivial, 0 deterministic, 0 nondeterministic) and one nonterminating remainder module.1 modules have a trivial ranking function, the largest among these consists of 3 locations. The remainder module has 4 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 0.6s and 2 iterations. TraceHistogramMax:1. Analysis of lassos took 0.4s. Construction of modules took 0.0s. Büchi inclusion checks took 0.1s. Highest rank in rank-based complementation 0. Minimization of det autom 1. Minimization of nondet autom 0. Automata minimization 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations. 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: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 10 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5 IncrementalHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 7 mSDtfsCounter, 5 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont1 unkn0 SFLI1 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: 18]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite program execution. Stem: [L14] int a, x, y; [L15] x = __VERIFIER_nondet_int() [L16] y = __VERIFIER_nondet_int() Loop: [L18] COND TRUE x > 0 && y < 0 [L19] COND TRUE x > y [L20] y = ~x End of lasso representation. - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 18]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L14] int a, x, y; [L15] x = __VERIFIER_nondet_int() [L16] y = __VERIFIER_nondet_int() Loop: [L18] COND TRUE x > 0 && y < 0 [L19] COND TRUE x > y [L20] y = ~x End of lasso representation. RESULT: Ultimate proved your program to be incorrect! [2023-11-19 08:01:16,470 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c86950-55b0-4d9a-a236-ec62cbfc1284/bin/uautomizer-verify-uCwYo4JHxu/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)