./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-bwb/xor-01-false.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version e04fb08f 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_64a93dd8-20f4-4d0c-9bbf-2a0bd99aa656/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a93dd8-20f4-4d0c-9bbf-2a0bd99aa656/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a93dd8-20f4-4d0c-9bbf-2a0bd99aa656/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a93dd8-20f4-4d0c-9bbf-2a0bd99aa656/bin/uautomizer-tPACEb0tL8/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-bwb/xor-01-false.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a93dd8-20f4-4d0c-9bbf-2a0bd99aa656/bin/uautomizer-tPACEb0tL8/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a93dd8-20f4-4d0c-9bbf-2a0bd99aa656/bin/uautomizer-tPACEb0tL8 --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 2c513ce74590e6cb0704f3ffcd99d381485eec77314e047b28e9d8c5ce60c589 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 12:47:34,726 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:47:34,728 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:47:34,746 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:47:34,747 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:47:34,748 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:47:34,750 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:47:34,751 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:47:34,753 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:47:34,754 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:47:34,756 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:47:34,757 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:47:34,757 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:47:34,759 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:47:34,760 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:47:34,761 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:47:34,762 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:47:34,763 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:47:34,765 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:47:34,767 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:47:34,773 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:47:34,774 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:47:34,775 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:47:34,776 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:47:34,780 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:47:34,780 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:47:34,781 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:47:34,782 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:47:34,782 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:47:34,784 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:47:34,784 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:47:34,785 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:47:34,786 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:47:34,787 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:47:34,788 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:47:34,788 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:47:34,789 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:47:34,790 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:47:34,790 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:47:34,791 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:47:34,792 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:47:34,793 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a93dd8-20f4-4d0c-9bbf-2a0bd99aa656/bin/uautomizer-tPACEb0tL8/config/svcomp-Termination-64bit-Automizer_Default.epf [2022-11-16 12:47:34,822 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:47:34,822 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:47:34,823 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:47:34,823 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:47:34,824 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:47:34,824 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:47:34,825 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:47:34,825 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2022-11-16 12:47:34,825 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2022-11-16 12:47:34,826 INFO L138 SettingsManager]: * Use old map elimination=false [2022-11-16 12:47:34,826 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2022-11-16 12:47:34,827 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2022-11-16 12:47:34,828 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2022-11-16 12:47:34,828 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:47:34,829 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 12:47:34,829 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:47:34,829 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:47:34,829 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2022-11-16 12:47:34,830 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2022-11-16 12:47:34,830 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2022-11-16 12:47:34,830 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 12:47:34,831 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2022-11-16 12:47:34,831 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:47:34,831 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2022-11-16 12:47:34,833 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:47:34,833 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:47:34,834 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:47:34,834 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:47:34,836 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-11-16 12:47:34,836 INFO L138 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_64a93dd8-20f4-4d0c-9bbf-2a0bd99aa656/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a93dd8-20f4-4d0c-9bbf-2a0bd99aa656/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2c513ce74590e6cb0704f3ffcd99d381485eec77314e047b28e9d8c5ce60c589 [2022-11-16 12:47:35,110 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:47:35,161 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:47:35,164 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:47:35,167 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:47:35,169 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:47:35,170 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a93dd8-20f4-4d0c-9bbf-2a0bd99aa656/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/termination-bwb/xor-01-false.c [2022-11-16 12:47:35,255 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a93dd8-20f4-4d0c-9bbf-2a0bd99aa656/bin/uautomizer-tPACEb0tL8/data/71864b230/dfc213c6dc7f4219b483721224240990/FLAG292609b44 [2022-11-16 12:47:35,742 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:47:35,743 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a93dd8-20f4-4d0c-9bbf-2a0bd99aa656/sv-benchmarks/c/termination-bwb/xor-01-false.c [2022-11-16 12:47:35,753 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a93dd8-20f4-4d0c-9bbf-2a0bd99aa656/bin/uautomizer-tPACEb0tL8/data/71864b230/dfc213c6dc7f4219b483721224240990/FLAG292609b44 [2022-11-16 12:47:36,127 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a93dd8-20f4-4d0c-9bbf-2a0bd99aa656/bin/uautomizer-tPACEb0tL8/data/71864b230/dfc213c6dc7f4219b483721224240990 [2022-11-16 12:47:36,129 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:47:36,131 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:47:36,135 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:47:36,136 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:47:36,139 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:47:36,140 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:47:36" (1/1) ... [2022-11-16 12:47:36,142 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@511b0422 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:47:36, skipping insertion in model container [2022-11-16 12:47:36,143 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:47:36" (1/1) ... [2022-11-16 12:47:36,151 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:47:36,166 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:47:36,339 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:47:36,344 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:47:36,356 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:47:36,368 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:47:36,369 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:47:36 WrapperNode [2022-11-16 12:47:36,369 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:47:36,370 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:47:36,371 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:47:36,371 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:47:36,378 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:47:36" (1/1) ... [2022-11-16 12:47:36,386 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:47:36" (1/1) ... [2022-11-16 12:47:36,407 INFO L138 Inliner]: procedures = 4, calls = 2, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 30 [2022-11-16 12:47:36,407 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:47:36,408 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:47:36,408 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:47:36,409 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:47:36,417 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:47:36" (1/1) ... [2022-11-16 12:47:36,418 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:47:36" (1/1) ... [2022-11-16 12:47:36,418 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:47:36" (1/1) ... [2022-11-16 12:47:36,419 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:47:36" (1/1) ... [2022-11-16 12:47:36,421 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:47:36" (1/1) ... [2022-11-16 12:47:36,425 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:47:36" (1/1) ... [2022-11-16 12:47:36,426 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:47:36" (1/1) ... [2022-11-16 12:47:36,427 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:47:36" (1/1) ... [2022-11-16 12:47:36,428 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:47:36,429 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:47:36,429 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:47:36,429 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:47:36,430 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:47:36" (1/1) ... [2022-11-16 12:47:36,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:47:36,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a93dd8-20f4-4d0c-9bbf-2a0bd99aa656/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:47:36,465 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a93dd8-20f4-4d0c-9bbf-2a0bd99aa656/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-16 12:47:36,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a93dd8-20f4-4d0c-9bbf-2a0bd99aa656/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2022-11-16 12:47:36,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:47:36,504 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:47:36,562 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:47:36,564 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:47:36,683 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:47:36,690 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:47:36,690 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-16 12:47:36,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:47:36 BoogieIcfgContainer [2022-11-16 12:47:36,692 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:47:36,693 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2022-11-16 12:47:36,694 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2022-11-16 12:47:36,703 INFO L275 PluginConnector]: BuchiAutomizer initialized [2022-11-16 12:47:36,704 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-11-16 12:47:36,704 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 16.11 12:47:36" (1/3) ... [2022-11-16 12:47:36,705 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@5d2e7206 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 16.11 12:47:36, skipping insertion in model container [2022-11-16 12:47:36,705 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-11-16 12:47:36,705 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:47:36" (2/3) ... [2022-11-16 12:47:36,706 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@5d2e7206 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 16.11 12:47:36, skipping insertion in model container [2022-11-16 12:47:36,706 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-11-16 12:47:36,706 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:47:36" (3/3) ... [2022-11-16 12:47:36,708 INFO L332 chiAutomizerObserver]: Analyzing ICFG xor-01-false.c [2022-11-16 12:47:36,779 INFO L303 stractBuchiCegarLoop]: Interprodecural is true [2022-11-16 12:47:36,779 INFO L304 stractBuchiCegarLoop]: Hoare is false [2022-11-16 12:47:36,780 INFO L305 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2022-11-16 12:47:36,780 INFO L306 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2022-11-16 12:47:36,780 INFO L307 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2022-11-16 12:47:36,780 INFO L308 stractBuchiCegarLoop]: Difference is false [2022-11-16 12:47:36,780 INFO L309 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2022-11-16 12:47:36,781 INFO L313 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2022-11-16 12:47:36,788 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 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) [2022-11-16 12:47:36,820 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2022-11-16 12:47:36,821 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-16 12:47:36,821 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-16 12:47:36,839 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2022-11-16 12:47:36,839 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1] [2022-11-16 12:47:36,839 INFO L335 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2022-11-16 12:47:36,839 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 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) [2022-11-16 12:47:36,840 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2022-11-16 12:47:36,841 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-16 12:47:36,841 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-16 12:47:36,841 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2022-11-16 12:47:36,841 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1] [2022-11-16 12:47:36,849 INFO L748 eck$LassoCheckResult]: Stem: 5#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true; 9#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_~b~0#1, main_~x~0#1;havoc main_~a~0#1;havoc main_~b~0#1;havoc main_~x~0#1;main_~a~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~x~0#1 := main_#t~nondet1#1;havoc main_#t~nondet1#1;main_~b~0#1 := 0; 6#L18-2true [2022-11-16 12:47:36,849 INFO L750 eck$LassoCheckResult]: Loop: 6#L18-2true assume !!(main_~x~0#1 > 0); 4#L18true assume !(main_~a~0#1 >= 0);main_~x~0#1 := main_~x~0#1 - 1;main_~a~0#1 := 1; 6#L18-2true [2022-11-16 12:47:36,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:47:36,858 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2022-11-16 12:47:36,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:47:36,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004309733] [2022-11-16 12:47:36,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:36,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:47:36,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:47:36,964 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:47:36,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:47:36,988 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:47:36,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:47:36,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1335, now seen corresponding path program 1 times [2022-11-16 12:47:36,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:47:36,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585202643] [2022-11-16 12:47:36,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:36,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:47:37,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:47:37,002 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:47:37,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:47:37,007 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:47:37,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:47:37,009 INFO L85 PathProgramCache]: Analyzing trace with hash 925817, now seen corresponding path program 1 times [2022-11-16 12:47:37,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:47:37,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185664468] [2022-11-16 12:47:37,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:37,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:47:37,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:47:37,016 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:47:37,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:47:37,022 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:47:37,096 INFO L210 LassoAnalysis]: Preferences: [2022-11-16 12:47:37,097 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-16 12:47:37,097 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-16 12:47:37,097 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-16 12:47:37,097 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-11-16 12:47:37,098 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:47:37,098 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-16 12:47:37,098 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-16 12:47:37,098 INFO L133 ssoRankerPreferences]: Filename of dumped script: xor-01-false.c_Iteration1_Loop [2022-11-16 12:47:37,098 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-16 12:47:37,099 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-16 12:47:37,123 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-16 12:47:37,173 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-16 12:47:37,258 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-16 12:47:37,259 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-11-16 12:47:37,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:47:37,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a93dd8-20f4-4d0c-9bbf-2a0bd99aa656/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:47:37,265 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a93dd8-20f4-4d0c-9bbf-2a0bd99aa656/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-16 12:47:37,272 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-16 12:47:37,273 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-16 12:47:37,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a93dd8-20f4-4d0c-9bbf-2a0bd99aa656/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2022-11-16 12:47:37,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a93dd8-20f4-4d0c-9bbf-2a0bd99aa656/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2022-11-16 12:47:37,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:47:37,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a93dd8-20f4-4d0c-9bbf-2a0bd99aa656/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:47:37,323 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a93dd8-20f4-4d0c-9bbf-2a0bd99aa656/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-16 12:47:37,333 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-11-16 12:47:37,333 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-16 12:47:37,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a93dd8-20f4-4d0c-9bbf-2a0bd99aa656/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2022-11-16 12:47:37,392 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-11-16 12:47:37,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a93dd8-20f4-4d0c-9bbf-2a0bd99aa656/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2022-11-16 12:47:37,401 INFO L210 LassoAnalysis]: Preferences: [2022-11-16 12:47:37,401 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-16 12:47:37,402 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-16 12:47:37,402 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-16 12:47:37,402 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-11-16 12:47:37,402 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:47:37,402 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-16 12:47:37,402 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-16 12:47:37,403 INFO L133 ssoRankerPreferences]: Filename of dumped script: xor-01-false.c_Iteration1_Loop [2022-11-16 12:47:37,403 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-16 12:47:37,403 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-16 12:47:37,404 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-16 12:47:37,424 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-16 12:47:37,482 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-16 12:47:37,487 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-11-16 12:47:37,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:47:37,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a93dd8-20f4-4d0c-9bbf-2a0bd99aa656/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:47:37,498 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a93dd8-20f4-4d0c-9bbf-2a0bd99aa656/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-16 12:47:37,505 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-11-16 12:47:37,520 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-16 12:47:37,520 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-16 12:47:37,521 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-16 12:47:37,521 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-16 12:47:37,521 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-16 12:47:37,525 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-16 12:47:37,526 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-16 12:47:37,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a93dd8-20f4-4d0c-9bbf-2a0bd99aa656/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2022-11-16 12:47:37,547 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-11-16 12:47:37,553 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2022-11-16 12:47:37,553 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2022-11-16 12:47:37,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:47:37,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a93dd8-20f4-4d0c-9bbf-2a0bd99aa656/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:47:37,559 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a93dd8-20f4-4d0c-9bbf-2a0bd99aa656/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-16 12:47:37,567 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-11-16 12:47:37,567 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-11-16 12:47:37,568 INFO L513 LassoAnalysis]: Proved termination. [2022-11-16 12:47:37,568 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~a~0#1) = -1*ULTIMATE.start_main_~a~0#1 Supporting invariants [] [2022-11-16 12:47:37,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a93dd8-20f4-4d0c-9bbf-2a0bd99aa656/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2022-11-16 12:47:37,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a93dd8-20f4-4d0c-9bbf-2a0bd99aa656/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2022-11-16 12:47:37,582 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-11-16 12:47:37,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:47:37,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:37,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 12:47:37,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:47:37,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:37,654 WARN L261 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:47:37,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:47:37,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:47:37,709 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2022-11-16 12:47:37,711 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 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, 3 states have (on average 1.3333333333333333) 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) [2022-11-16 12:47:37,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a93dd8-20f4-4d0c-9bbf-2a0bd99aa656/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2022-11-16 12:47:37,830 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 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, 3 states have (on average 1.3333333333333333) 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) Result 36 states and 53 transitions. Complement of second has 6 states. [2022-11-16 12:47:37,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2022-11-16 12:47:37,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 1.3333333333333333) 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) [2022-11-16 12:47:37,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 26 transitions. [2022-11-16 12:47:37,844 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 26 transitions. Stem has 2 letters. Loop has 2 letters. [2022-11-16 12:47:37,845 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-16 12:47:37,845 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 26 transitions. Stem has 4 letters. Loop has 2 letters. [2022-11-16 12:47:37,845 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-16 12:47:37,845 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 26 transitions. Stem has 2 letters. Loop has 4 letters. [2022-11-16 12:47:37,846 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-16 12:47:37,846 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 36 states and 53 transitions. [2022-11-16 12:47:37,849 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2022-11-16 12:47:37,853 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 36 states to 13 states and 19 transitions. [2022-11-16 12:47:37,854 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 10 [2022-11-16 12:47:37,854 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2022-11-16 12:47:37,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 19 transitions. [2022-11-16 12:47:37,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-11-16 12:47:37,856 INFO L218 hiAutomatonCegarLoop]: Abstraction has 13 states and 19 transitions. [2022-11-16 12:47:37,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 19 transitions. [2022-11-16 12:47:37,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-11-16 12:47:37,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 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) [2022-11-16 12:47:37,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 19 transitions. [2022-11-16 12:47:37,882 INFO L240 hiAutomatonCegarLoop]: Abstraction has 13 states and 19 transitions. [2022-11-16 12:47:37,883 INFO L428 stractBuchiCegarLoop]: Abstraction has 13 states and 19 transitions. [2022-11-16 12:47:37,883 INFO L335 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2022-11-16 12:47:37,883 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 13 states and 19 transitions. [2022-11-16 12:47:37,884 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2022-11-16 12:47:37,884 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-16 12:47:37,884 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-16 12:47:37,885 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2022-11-16 12:47:37,885 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2022-11-16 12:47:37,885 INFO L748 eck$LassoCheckResult]: Stem: 87#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 88#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_~b~0#1, main_~x~0#1;havoc main_~a~0#1;havoc main_~b~0#1;havoc main_~x~0#1;main_~a~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~x~0#1 := main_#t~nondet1#1;havoc main_#t~nondet1#1;main_~b~0#1 := 0; 94#L18-2 assume !!(main_~x~0#1 > 0); 83#L18 assume main_~a~0#1 >= 0; 84#L20 main_~a~0#1 := 1; 92#L20-6 [2022-11-16 12:47:37,885 INFO L750 eck$LassoCheckResult]: Loop: 92#L20-6 main_~x~0#1 := main_~x~0#1 + main_~a~0#1; 89#L18-2 assume !!(main_~x~0#1 > 0); 90#L18 assume main_~a~0#1 >= 0; 95#L20 main_~a~0#1 := 1; 92#L20-6 [2022-11-16 12:47:37,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:47:37,886 INFO L85 PathProgramCache]: Analyzing trace with hash 28699755, now seen corresponding path program 1 times [2022-11-16 12:47:37,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:47:37,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693799166] [2022-11-16 12:47:37,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:37,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:47:37,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:47:37,892 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:47:37,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:47:37,896 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:47:37,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:47:37,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1858064, now seen corresponding path program 1 times [2022-11-16 12:47:37,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:47:37,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214567713] [2022-11-16 12:47:37,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:37,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:47:37,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:47:37,904 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:47:37,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:47:37,908 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:47:37,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:47:37,909 INFO L85 PathProgramCache]: Analyzing trace with hash 584188282, now seen corresponding path program 1 times [2022-11-16 12:47:37,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:47:37,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058163955] [2022-11-16 12:47:37,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:37,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:47:37,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:47:37,918 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:47:37,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:47:37,925 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:47:37,953 INFO L210 LassoAnalysis]: Preferences: [2022-11-16 12:47:37,954 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-16 12:47:37,954 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-16 12:47:37,954 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-16 12:47:37,954 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-11-16 12:47:37,954 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:47:37,955 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-16 12:47:37,955 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-16 12:47:37,955 INFO L133 ssoRankerPreferences]: Filename of dumped script: xor-01-false.c_Iteration2_Loop [2022-11-16 12:47:37,955 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-16 12:47:37,955 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-16 12:47:37,956 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-16 12:47:38,005 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-16 12:47:38,006 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-11-16 12:47:38,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:47:38,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a93dd8-20f4-4d0c-9bbf-2a0bd99aa656/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:47:38,015 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a93dd8-20f4-4d0c-9bbf-2a0bd99aa656/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-16 12:47:38,024 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-16 12:47:38,024 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-16 12:47:38,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a93dd8-20f4-4d0c-9bbf-2a0bd99aa656/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2022-11-16 12:47:38,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a93dd8-20f4-4d0c-9bbf-2a0bd99aa656/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2022-11-16 12:47:38,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:47:38,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a93dd8-20f4-4d0c-9bbf-2a0bd99aa656/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:47:38,069 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a93dd8-20f4-4d0c-9bbf-2a0bd99aa656/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-16 12:47:38,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a93dd8-20f4-4d0c-9bbf-2a0bd99aa656/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2022-11-16 12:47:38,076 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-11-16 12:47:38,076 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-16 12:47:38,178 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-16 12:47:38,178 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~x~0#1=1, ULTIMATE.start_main_~a~0#1=0} Honda state: {ULTIMATE.start_main_~x~0#1=1, ULTIMATE.start_main_~a~0#1=0} Generalized eigenvectors: [{ULTIMATE.start_main_~x~0#1=1, ULTIMATE.start_main_~a~0#1=0}, {ULTIMATE.start_main_~x~0#1=-1, ULTIMATE.start_main_~a~0#1=1}, {ULTIMATE.start_main_~x~0#1=0, ULTIMATE.start_main_~a~0#1=0}] Lambdas: [1, 0, 7] Nus: [0, 1] [2022-11-16 12:47:38,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a93dd8-20f4-4d0c-9bbf-2a0bd99aa656/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2022-11-16 12:47:38,242 INFO L210 LassoAnalysis]: Preferences: [2022-11-16 12:47:38,243 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-16 12:47:38,245 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-16 12:47:38,246 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-16 12:47:38,246 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-11-16 12:47:38,246 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:47:38,246 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-16 12:47:38,246 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-16 12:47:38,248 INFO L133 ssoRankerPreferences]: Filename of dumped script: xor-01-false.c_Iteration2_Lasso [2022-11-16 12:47:38,248 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-16 12:47:38,250 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-16 12:47:38,252 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-16 12:47:38,257 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-16 12:47:38,262 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-16 12:47:38,266 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-16 12:47:38,272 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-16 12:47:38,369 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-16 12:47:38,369 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-11-16 12:47:38,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:47:38,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a93dd8-20f4-4d0c-9bbf-2a0bd99aa656/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:47:38,371 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a93dd8-20f4-4d0c-9bbf-2a0bd99aa656/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-16 12:47:38,376 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-16 12:47:38,376 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-16 12:47:38,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a93dd8-20f4-4d0c-9bbf-2a0bd99aa656/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2022-11-16 12:47:38,411 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-16 12:47:38,412 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~nondet1#1=0} Honda state: {ULTIMATE.start_main_#t~nondet1#1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-11-16 12:47:38,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a93dd8-20f4-4d0c-9bbf-2a0bd99aa656/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2022-11-16 12:47:38,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:47:38,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a93dd8-20f4-4d0c-9bbf-2a0bd99aa656/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:47:38,421 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a93dd8-20f4-4d0c-9bbf-2a0bd99aa656/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-16 12:47:38,436 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-16 12:47:38,437 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-16 12:47:38,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a93dd8-20f4-4d0c-9bbf-2a0bd99aa656/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2022-11-16 12:47:38,463 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-16 12:47:38,463 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#res#1=0} Honda state: {ULTIMATE.start_main_#res#1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-11-16 12:47:38,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a93dd8-20f4-4d0c-9bbf-2a0bd99aa656/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2022-11-16 12:47:38,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:47:38,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a93dd8-20f4-4d0c-9bbf-2a0bd99aa656/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:47:38,475 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a93dd8-20f4-4d0c-9bbf-2a0bd99aa656/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-16 12:47:38,484 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-16 12:47:38,484 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-16 12:47:38,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a93dd8-20f4-4d0c-9bbf-2a0bd99aa656/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2022-11-16 12:47:38,506 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-16 12:47:38,506 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~nondet0#1=0} Honda state: {ULTIMATE.start_main_#t~nondet0#1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-11-16 12:47:38,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a93dd8-20f4-4d0c-9bbf-2a0bd99aa656/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2022-11-16 12:47:38,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:47:38,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a93dd8-20f4-4d0c-9bbf-2a0bd99aa656/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:47:38,516 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a93dd8-20f4-4d0c-9bbf-2a0bd99aa656/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-16 12:47:38,530 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-16 12:47:38,530 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-16 12:47:38,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a93dd8-20f4-4d0c-9bbf-2a0bd99aa656/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2022-11-16 12:47:38,558 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-16 12:47:38,558 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~b~0#1=0} Honda state: {ULTIMATE.start_main_~b~0#1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-11-16 12:47:38,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a93dd8-20f4-4d0c-9bbf-2a0bd99aa656/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2022-11-16 12:47:38,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:47:38,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a93dd8-20f4-4d0c-9bbf-2a0bd99aa656/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:47:38,568 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a93dd8-20f4-4d0c-9bbf-2a0bd99aa656/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-16 12:47:38,576 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-16 12:47:38,576 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-16 12:47:38,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a93dd8-20f4-4d0c-9bbf-2a0bd99aa656/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2022-11-16 12:47:38,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a93dd8-20f4-4d0c-9bbf-2a0bd99aa656/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2022-11-16 12:47:38,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:47:38,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a93dd8-20f4-4d0c-9bbf-2a0bd99aa656/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:47:38,617 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a93dd8-20f4-4d0c-9bbf-2a0bd99aa656/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-16 12:47:38,622 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-11-16 12:47:38,622 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-16 12:47:38,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a93dd8-20f4-4d0c-9bbf-2a0bd99aa656/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2022-11-16 12:47:38,685 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-16 12:47:38,685 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~x~0#1=0, ULTIMATE.start_main_~a~0#1=0} Honda state: {ULTIMATE.start_main_~x~0#1=2, ULTIMATE.start_main_~a~0#1=1} Generalized eigenvectors: [{ULTIMATE.start_main_~x~0#1=0, ULTIMATE.start_main_~a~0#1=0}, {ULTIMATE.start_main_~x~0#1=0, ULTIMATE.start_main_~a~0#1=0}, {ULTIMATE.start_main_~x~0#1=1, ULTIMATE.start_main_~a~0#1=0}] Lambdas: [12, 1, 1] Nus: [0, 0] [2022-11-16 12:47:38,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a93dd8-20f4-4d0c-9bbf-2a0bd99aa656/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2022-11-16 12:47:38,716 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 16.11 12:47:38 BoogieIcfgContainer [2022-11-16 12:47:38,716 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2022-11-16 12:47:38,716 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-16 12:47:38,716 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-16 12:47:38,717 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-16 12:47:38,717 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:47:36" (3/4) ... [2022-11-16 12:47:38,720 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2022-11-16 12:47:38,762 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a93dd8-20f4-4d0c-9bbf-2a0bd99aa656/bin/uautomizer-tPACEb0tL8/witness.graphml [2022-11-16 12:47:38,763 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-16 12:47:38,764 INFO L158 Benchmark]: Toolchain (without parser) took 2633.34ms. Allocated memory is still 153.1MB. Free memory was 119.3MB in the beginning and 99.7MB in the end (delta: 19.5MB). Peak memory consumption was 16.2MB. Max. memory is 16.1GB. [2022-11-16 12:47:38,765 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 94.4MB. Free memory was 67.9MB in the beginning and 67.9MB in the end (delta: 28.8kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 12:47:38,765 INFO L158 Benchmark]: CACSL2BoogieTranslator took 234.29ms. Allocated memory is still 153.1MB. Free memory was 119.0MB in the beginning and 130.4MB in the end (delta: -11.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-16 12:47:38,766 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.50ms. Allocated memory is still 153.1MB. Free memory was 130.4MB in the beginning and 128.9MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 12:47:38,768 INFO L158 Benchmark]: Boogie Preprocessor took 20.00ms. Allocated memory is still 153.1MB. Free memory was 128.9MB in the beginning and 127.9MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-16 12:47:38,770 INFO L158 Benchmark]: RCFGBuilder took 263.60ms. Allocated memory is still 153.1MB. Free memory was 127.9MB in the beginning and 119.5MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-16 12:47:38,771 INFO L158 Benchmark]: BuchiAutomizer took 2022.56ms. Allocated memory is still 153.1MB. Free memory was 119.5MB in the beginning and 101.3MB in the end (delta: 18.2MB). Peak memory consumption was 17.1MB. Max. memory is 16.1GB. [2022-11-16 12:47:38,771 INFO L158 Benchmark]: Witness Printer took 46.83ms. Allocated memory is still 153.1MB. Free memory was 101.3MB in the beginning and 99.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-16 12:47:38,773 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 94.4MB. Free memory was 67.9MB in the beginning and 67.9MB in the end (delta: 28.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 234.29ms. Allocated memory is still 153.1MB. Free memory was 119.0MB in the beginning and 130.4MB in the end (delta: -11.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 37.50ms. Allocated memory is still 153.1MB. Free memory was 130.4MB in the beginning and 128.9MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 20.00ms. Allocated memory is still 153.1MB. Free memory was 128.9MB in the beginning and 127.9MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 263.60ms. Allocated memory is still 153.1MB. Free memory was 127.9MB in the beginning and 119.5MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * BuchiAutomizer took 2022.56ms. Allocated memory is still 153.1MB. Free memory was 119.5MB in the beginning and 101.3MB in the end (delta: 18.2MB). Peak memory consumption was 17.1MB. Max. memory is 16.1GB. * Witness Printer took 46.83ms. Allocated memory is still 153.1MB. Free memory was 101.3MB in the beginning and 99.7MB 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 Your program was decomposed into 1 terminating modules (0 trivial, 1 deterministic, 0 nondeterministic) and one nonterminating remainder module.One deterministic module has affine ranking function -1 * a and consists of 4 locations. The remainder module has 13 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 1.9s and 2 iterations. TraceHistogramMax:1. Analysis of lassos took 1.5s. Construction of modules took 0.0s. Büchi inclusion checks took 0.2s. Highest rank in rank-based complementation 3. Minimization of det autom 0. Minimization of nondet autom 1. 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 [1, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 8 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7 mSDsluCounter, 13 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 5 mSDsCounter, 1 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5 IncrementalHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1 mSolverCounterUnsat, 8 mSDtfsCounter, 5 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont1 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital18 mio100 ax100 hnf100 lsp76 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq161 hnf92 smp100 dnf100 smp100 tf108 neg100 sie110 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: sat Degree: 0 Time: 80ms VariablesStem: 0 VariablesLoop: 2 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 4 LassoNonterminationAnalysisSatUnbounded: 2 LassoNonterminationAnalysisUnsat: 1 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.5s InitialAbstractionConstructionTime: 0.0s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - GeometricNonTerminationArgumentResult [Line: 18]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite execution State at position 0 is {x=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@19c5460b=0, a=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@5dea01ca=0, \result=0, b=0} State at position 1 is {x=2, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@19c5460b=0, a=1, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@5dea01ca=0, \result=0, b=0} For i>1, the state at position i is {x=2 + sum_{k=0}^i 1, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@19c5460b=0 + sum_{k=0}^i 0, a=1 + sum_{k=0}^i 0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@5dea01ca=0 + sum_{k=0}^i 0, \result=0 + sum_{k=0}^i 0, b=0 + sum_{k=0}^i 0} - StatisticsResult: NonterminationArgumentStatistics Unbounded Execution 1GEVs Lambdas: [12, 1, 1] Mus: [0, 0] - NonterminatingLassoResult [Line: 18]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L13] int a, b, x; [L14] a = __VERIFIER_nondet_int() [L15] x = __VERIFIER_nondet_int() [L16] b = 0 [L17] COND TRUE x>0 [L18] COND TRUE a >= 0 [L20] a = 0^1 Loop: [L21] x= x+a [L17] COND TRUE x>0 [L18] COND TRUE a >= 0 [L20] a = 0^1 End of lasso representation. RESULT: Ultimate proved your program to be incorrect! [2022-11-16 12:47:38,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a93dd8-20f4-4d0c-9bbf-2a0bd99aa656/bin/uautomizer-tPACEb0tL8/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)