./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-bwb/reverse-bits1.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-bwb/reverse-bits1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro --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 3e71bbd54e7c2fb1c47dcb82c9eb8e40d9fc6da26d5ad2a71ce148ceb3cd82ca --- 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-8393723 [2022-11-18 20:19:35,718 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:19:35,720 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:19:35,745 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:19:35,746 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:19:35,747 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:19:35,749 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:19:35,751 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:19:35,754 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:19:35,755 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:19:35,756 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:19:35,758 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:19:35,759 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:19:35,760 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:19:35,762 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:19:35,763 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:19:35,765 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:19:35,766 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:19:35,769 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:19:35,772 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:19:35,774 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:19:35,776 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:19:35,778 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:19:35,779 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:19:35,783 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:19:35,784 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:19:35,785 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:19:35,786 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:19:35,787 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:19:35,788 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:19:35,789 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:19:35,790 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:19:35,791 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:19:35,792 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:19:35,794 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:19:35,794 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:19:35,795 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:19:35,796 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:19:35,797 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:19:35,798 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:19:35,799 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:19:35,800 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/config/svcomp-Termination-64bit-Automizer_Default.epf [2022-11-18 20:19:35,845 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:19:35,846 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:19:35,846 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:19:35,847 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:19:35,848 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:19:35,849 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:19:35,849 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:19:35,850 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2022-11-18 20:19:35,850 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2022-11-18 20:19:35,851 INFO L138 SettingsManager]: * Use old map elimination=false [2022-11-18 20:19:35,851 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2022-11-18 20:19:35,852 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2022-11-18 20:19:35,852 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2022-11-18 20:19:35,853 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:19:35,853 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-18 20:19:35,853 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:19:35,854 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:19:35,854 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2022-11-18 20:19:35,855 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2022-11-18 20:19:35,855 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2022-11-18 20:19:35,856 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 20:19:35,856 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2022-11-18 20:19:35,857 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:19:35,857 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2022-11-18 20:19:35,858 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:19:35,858 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:19:35,859 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:19:35,859 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:19:35,861 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-11-18 20:19:35,861 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_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3e71bbd54e7c2fb1c47dcb82c9eb8e40d9fc6da26d5ad2a71ce148ceb3cd82ca [2022-11-18 20:19:36,233 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:19:36,274 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:19:36,278 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:19:36,280 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:19:36,283 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:19:36,284 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/termination-bwb/reverse-bits1.i [2022-11-18 20:19:36,390 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/data/83f5b3da8/e687e4e954934e3eae123580a84308cf/FLAG28856bd29 [2022-11-18 20:19:36,940 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:19:36,941 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/sv-benchmarks/c/termination-bwb/reverse-bits1.i [2022-11-18 20:19:36,950 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/data/83f5b3da8/e687e4e954934e3eae123580a84308cf/FLAG28856bd29 [2022-11-18 20:19:37,265 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/data/83f5b3da8/e687e4e954934e3eae123580a84308cf [2022-11-18 20:19:37,269 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:19:37,271 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:19:37,277 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:19:37,277 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:19:37,282 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:19:37,283 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:19:37" (1/1) ... [2022-11-18 20:19:37,284 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@500c1c6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:19:37, skipping insertion in model container [2022-11-18 20:19:37,285 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:19:37" (1/1) ... [2022-11-18 20:19:37,295 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:19:37,314 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:19:37,541 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:19:37,558 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:19:37,578 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:19:37,594 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:19:37,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:19:37 WrapperNode [2022-11-18 20:19:37,595 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:19:37,596 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:19:37,597 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:19:37,597 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:19:37,606 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:19:37" (1/1) ... [2022-11-18 20:19:37,614 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:19:37" (1/1) ... [2022-11-18 20:19:37,636 INFO L138 Inliner]: procedures = 5, calls = 2, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 55 [2022-11-18 20:19:37,637 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:19:37,638 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:19:37,638 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:19:37,638 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:19:37,649 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:19:37" (1/1) ... [2022-11-18 20:19:37,650 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:19:37" (1/1) ... [2022-11-18 20:19:37,651 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:19:37" (1/1) ... [2022-11-18 20:19:37,651 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:19:37" (1/1) ... [2022-11-18 20:19:37,655 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:19:37" (1/1) ... [2022-11-18 20:19:37,660 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:19:37" (1/1) ... [2022-11-18 20:19:37,661 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:19:37" (1/1) ... [2022-11-18 20:19:37,662 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:19:37" (1/1) ... [2022-11-18 20:19:37,664 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:19:37,665 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:19:37,665 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:19:37,665 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:19:37,666 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:19:37" (1/1) ... [2022-11-18 20:19:37,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:19:37,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:19:37,711 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-18 20:19:37,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2022-11-18 20:19:37,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:19:37,768 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:19:37,845 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:19:37,848 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:19:38,033 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:19:38,041 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:19:38,041 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-18 20:19:38,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:19:38 BoogieIcfgContainer [2022-11-18 20:19:38,043 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:19:38,044 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2022-11-18 20:19:38,044 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2022-11-18 20:19:38,051 INFO L275 PluginConnector]: BuchiAutomizer initialized [2022-11-18 20:19:38,052 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-11-18 20:19:38,052 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 18.11 08:19:37" (1/3) ... [2022-11-18 20:19:38,053 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1f6b8234 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 18.11 08:19:38, skipping insertion in model container [2022-11-18 20:19:38,053 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-11-18 20:19:38,053 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:19:37" (2/3) ... [2022-11-18 20:19:38,054 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1f6b8234 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 18.11 08:19:38, skipping insertion in model container [2022-11-18 20:19:38,054 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-11-18 20:19:38,054 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:19:38" (3/3) ... [2022-11-18 20:19:38,056 INFO L332 chiAutomizerObserver]: Analyzing ICFG reverse-bits1.i [2022-11-18 20:19:38,144 INFO L303 stractBuchiCegarLoop]: Interprodecural is true [2022-11-18 20:19:38,144 INFO L304 stractBuchiCegarLoop]: Hoare is false [2022-11-18 20:19:38,144 INFO L305 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2022-11-18 20:19:38,144 INFO L306 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2022-11-18 20:19:38,144 INFO L307 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2022-11-18 20:19:38,144 INFO L308 stractBuchiCegarLoop]: Difference is false [2022-11-18 20:19:38,144 INFO L309 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2022-11-18 20:19:38,145 INFO L313 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2022-11-18 20:19:38,149 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 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) [2022-11-18 20:19:38,181 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 7 [2022-11-18 20:19:38,182 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-18 20:19:38,182 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-18 20:19:38,203 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2022-11-18 20:19:38,204 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1] [2022-11-18 20:19:38,204 INFO L335 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2022-11-18 20:19:38,204 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 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) [2022-11-18 20:19:38,206 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 7 [2022-11-18 20:19:38,206 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-18 20:19:38,207 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-18 20:19:38,207 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2022-11-18 20:19:38,207 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1] [2022-11-18 20:19:38,223 INFO L748 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true;~r~0 := 0;~s~0 := 31;~v~0 := 0;~x~0 := 0;~y~0 := 0;~z~0 := 0;~n~0 := 0; 10#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~nondet1#1, main_#t~nondet2#1, main_#t~nondet3#1, main_#t~post4#1;~v~0 := main_#t~nondet0#1;havoc main_#t~nondet0#1;~n~0 := main_#t~nondet1#1;havoc main_#t~nondet1#1;~z~0 := main_#t~nondet2#1;havoc main_#t~nondet2#1;~x~0 := main_#t~nondet3#1;havoc main_#t~nondet3#1;~r~0 := ~v~0;~y~0 := ~v~0 - 1; 12#L18-2true [2022-11-18 20:19:38,224 INFO L750 eck$LassoCheckResult]: Loop: 12#L18-2true assume !!(0 != (if 0 == ~x~0 || 0 == ~v~0 - ~y~0 - 1 then 0 else (if ~x~0 == ~v~0 - ~y~0 - 1 then ~x~0 else ~bitwiseAnd(~x~0, ~v~0 - ~y~0 - 1))));~y~0 := 1; 12#L18-2true [2022-11-18 20:19:38,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:19:38,236 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2022-11-18 20:19:38,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:19:38,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028630067] [2022-11-18 20:19:38,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:19:38,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:19:38,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:19:38,329 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 20:19:38,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:19:38,356 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 20:19:38,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:19:38,361 INFO L85 PathProgramCache]: Analyzing trace with hash 42, now seen corresponding path program 1 times [2022-11-18 20:19:38,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:19:38,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077758699] [2022-11-18 20:19:38,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:19:38,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:19:38,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:19:38,379 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 20:19:38,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:19:38,395 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 20:19:38,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:19:38,398 INFO L85 PathProgramCache]: Analyzing trace with hash 29864, now seen corresponding path program 1 times [2022-11-18 20:19:38,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:19:38,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733232027] [2022-11-18 20:19:38,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:19:38,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:19:38,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:38,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:19:38,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:19:38,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733232027] [2022-11-18 20:19:38,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733232027] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:19:38,516 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:19:38,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:19:38,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544996028] [2022-11-18 20:19:38,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:19:38,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:19:38,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:19:38,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:19:38,664 INFO L87 Difference]: Start difference. First operand has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 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 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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) [2022-11-18 20:19:38,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:19:38,701 INFO L93 Difference]: Finished difference Result 16 states and 21 transitions. [2022-11-18 20:19:38,702 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 16 states and 21 transitions. [2022-11-18 20:19:38,704 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2022-11-18 20:19:38,707 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 16 states to 10 states and 14 transitions. [2022-11-18 20:19:38,709 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 10 [2022-11-18 20:19:38,709 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 10 [2022-11-18 20:19:38,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 14 transitions. [2022-11-18 20:19:38,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:19:38,710 INFO L218 hiAutomatonCegarLoop]: Abstraction has 10 states and 14 transitions. [2022-11-18 20:19:38,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states and 14 transitions. [2022-11-18 20:19:38,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-11-18 20:19:38,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 10 states have (on average 1.4) internal successors, (14), 9 states have internal predecessors, (14), 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) [2022-11-18 20:19:38,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 14 transitions. [2022-11-18 20:19:38,740 INFO L240 hiAutomatonCegarLoop]: Abstraction has 10 states and 14 transitions. [2022-11-18 20:19:38,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:19:38,746 INFO L428 stractBuchiCegarLoop]: Abstraction has 10 states and 14 transitions. [2022-11-18 20:19:38,746 INFO L335 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2022-11-18 20:19:38,746 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 10 states and 14 transitions. [2022-11-18 20:19:38,747 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2022-11-18 20:19:38,747 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-18 20:19:38,747 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-18 20:19:38,748 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2022-11-18 20:19:38,748 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2022-11-18 20:19:38,748 INFO L748 eck$LassoCheckResult]: Stem: 43#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;~r~0 := 0;~s~0 := 31;~v~0 := 0;~x~0 := 0;~y~0 := 0;~z~0 := 0;~n~0 := 0; 44#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_#t~nondet2#1, main_#t~nondet3#1, main_#t~post4#1;~v~0 := main_#t~nondet0#1;havoc main_#t~nondet0#1;~n~0 := main_#t~nondet1#1;havoc main_#t~nondet1#1;~z~0 := main_#t~nondet2#1;havoc main_#t~nondet2#1;~x~0 := main_#t~nondet3#1;havoc main_#t~nondet3#1;~r~0 := ~v~0;~y~0 := ~v~0 - 1; 47#L18-2 assume !(0 != (if 0 == ~x~0 || 0 == ~v~0 - ~y~0 - 1 then 0 else (if ~x~0 == ~v~0 - ~y~0 - 1 then ~x~0 else ~bitwiseAnd(~x~0, ~v~0 - ~y~0 - 1)))); 48#L18-3 ~v~0 := ~v~0 / 2; 49#L22-2 [2022-11-18 20:19:38,748 INFO L750 eck$LassoCheckResult]: Loop: 49#L22-2 assume !!(~v~0 > 0);~r~0 := 2 * ~r~0; 52#L24 assume 0 == ~v~0;~z~0 := 0; 46#L24-4 assume 0 == ~r~0 || ~r~0 == ~z~0;~r~0 := ~z~0; 50#L25-3 main_#t~post4#1 := ~s~0;~s~0 := main_#t~post4#1 - 1;havoc main_#t~post4#1;~v~0 := ~v~0 / 2; 49#L22-2 [2022-11-18 20:19:38,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:19:38,749 INFO L85 PathProgramCache]: Analyzing trace with hash 925737, now seen corresponding path program 1 times [2022-11-18 20:19:38,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:19:38,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432208102] [2022-11-18 20:19:38,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:19:38,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:19:38,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:19:38,764 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 20:19:38,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:19:38,777 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 20:19:38,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:19:38,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1665677, now seen corresponding path program 1 times [2022-11-18 20:19:38,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:19:38,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398103432] [2022-11-18 20:19:38,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:19:38,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:19:38,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:38,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:19:38,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:19:38,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398103432] [2022-11-18 20:19:38,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398103432] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:19:38,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:19:38,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:19:38,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041250308] [2022-11-18 20:19:38,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:19:38,809 INFO L765 eck$LassoCheckResult]: loop already infeasible [2022-11-18 20:19:38,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:19:38,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:19:38,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:19:38,811 INFO L87 Difference]: Start difference. First operand 10 states and 14 transitions. cyclomatic complexity: 5 Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 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) [2022-11-18 20:19:38,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:19:38,831 INFO L93 Difference]: Finished difference Result 10 states and 13 transitions. [2022-11-18 20:19:38,831 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 10 states and 13 transitions. [2022-11-18 20:19:38,832 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2022-11-18 20:19:38,832 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 10 states to 10 states and 13 transitions. [2022-11-18 20:19:38,832 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 10 [2022-11-18 20:19:38,833 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 10 [2022-11-18 20:19:38,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 13 transitions. [2022-11-18 20:19:38,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:19:38,833 INFO L218 hiAutomatonCegarLoop]: Abstraction has 10 states and 13 transitions. [2022-11-18 20:19:38,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states and 13 transitions. [2022-11-18 20:19:38,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-11-18 20:19:38,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 10 states have (on average 1.3) internal successors, (13), 9 states have internal predecessors, (13), 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) [2022-11-18 20:19:38,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2022-11-18 20:19:38,835 INFO L240 hiAutomatonCegarLoop]: Abstraction has 10 states and 13 transitions. [2022-11-18 20:19:38,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:19:38,837 INFO L428 stractBuchiCegarLoop]: Abstraction has 10 states and 13 transitions. [2022-11-18 20:19:38,837 INFO L335 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2022-11-18 20:19:38,837 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 10 states and 13 transitions. [2022-11-18 20:19:38,838 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2022-11-18 20:19:38,838 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-18 20:19:38,838 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-18 20:19:38,839 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2022-11-18 20:19:38,839 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1] [2022-11-18 20:19:38,839 INFO L748 eck$LassoCheckResult]: Stem: 69#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;~r~0 := 0;~s~0 := 31;~v~0 := 0;~x~0 := 0;~y~0 := 0;~z~0 := 0;~n~0 := 0; 70#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~nondet1#1, main_#t~nondet2#1, main_#t~nondet3#1, main_#t~post4#1;~v~0 := main_#t~nondet0#1;havoc main_#t~nondet0#1;~n~0 := main_#t~nondet1#1;havoc main_#t~nondet1#1;~z~0 := main_#t~nondet2#1;havoc main_#t~nondet2#1;~x~0 := main_#t~nondet3#1;havoc main_#t~nondet3#1;~r~0 := ~v~0;~y~0 := ~v~0 - 1; 73#L18-2 assume !(0 != (if 0 == ~x~0 || 0 == ~v~0 - ~y~0 - 1 then 0 else (if ~x~0 == ~v~0 - ~y~0 - 1 then ~x~0 else ~bitwiseAnd(~x~0, ~v~0 - ~y~0 - 1)))); 74#L18-3 ~v~0 := ~v~0 / 2; 75#L22-2 [2022-11-18 20:19:38,839 INFO L750 eck$LassoCheckResult]: Loop: 75#L22-2 assume !!(~v~0 > 0);~r~0 := 2 * ~r~0; 78#L24 assume !(0 == ~v~0); 71#L24-2 assume 1 == ~v~0;~z~0 := ~v~0; 72#L24-4 assume 0 == ~r~0 || ~r~0 == ~z~0;~r~0 := ~z~0; 76#L25-3 main_#t~post4#1 := ~s~0;~s~0 := main_#t~post4#1 - 1;havoc main_#t~post4#1;~v~0 := ~v~0 / 2; 75#L22-2 [2022-11-18 20:19:38,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:19:38,840 INFO L85 PathProgramCache]: Analyzing trace with hash 925737, now seen corresponding path program 2 times [2022-11-18 20:19:38,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:19:38,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908602781] [2022-11-18 20:19:38,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:19:38,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:19:38,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:19:38,851 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 20:19:38,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:19:38,863 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 20:19:38,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:19:38,864 INFO L85 PathProgramCache]: Analyzing trace with hash 51689571, now seen corresponding path program 1 times [2022-11-18 20:19:38,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:19:38,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476199560] [2022-11-18 20:19:38,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:19:38,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:19:38,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:19:38,874 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 20:19:38,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:19:38,884 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 20:19:38,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:19:38,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1155763909, now seen corresponding path program 1 times [2022-11-18 20:19:38,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:19:38,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529121958] [2022-11-18 20:19:38,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:19:38,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:19:38,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:39,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:19:39,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:19:39,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529121958] [2022-11-18 20:19:39,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529121958] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:19:39,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:19:39,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 20:19:39,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219482976] [2022-11-18 20:19:39,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:19:39,200 INFO L210 LassoAnalysis]: Preferences: [2022-11-18 20:19:39,201 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-18 20:19:39,201 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-18 20:19:39,201 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-18 20:19:39,201 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-11-18 20:19:39,202 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:19:39,202 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-18 20:19:39,202 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-18 20:19:39,202 INFO L133 ssoRankerPreferences]: Filename of dumped script: reverse-bits1.i_Iteration3_Loop [2022-11-18 20:19:39,202 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-18 20:19:39,203 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-18 20:19:39,227 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:19:39,255 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:19:39,260 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:19:39,405 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-18 20:19:39,405 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-11-18 20:19:39,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:19:39,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:19:39,415 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-18 20:19:39,424 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-18 20:19:39,424 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-18 20:19:39,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2022-11-18 20:19:39,458 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Ended with exit code 0 [2022-11-18 20:19:39,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:19:39,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:19:39,460 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-18 20:19:39,472 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-11-18 20:19:39,472 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-18 20:19:39,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2022-11-18 20:19:39,528 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-11-18 20:19:39,533 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Ended with exit code 0 [2022-11-18 20:19:39,533 INFO L210 LassoAnalysis]: Preferences: [2022-11-18 20:19:39,533 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-18 20:19:39,534 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-18 20:19:39,534 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-18 20:19:39,534 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-11-18 20:19:39,534 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:19:39,534 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-18 20:19:39,534 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-18 20:19:39,534 INFO L133 ssoRankerPreferences]: Filename of dumped script: reverse-bits1.i_Iteration3_Loop [2022-11-18 20:19:39,535 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-18 20:19:39,535 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-18 20:19:39,537 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:19:39,545 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:19:39,561 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:19:39,690 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-18 20:19:39,696 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-11-18 20:19:39,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:19:39,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:19:39,701 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-18 20:19:39,712 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 [2022-11-18 20:19:39,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2022-11-18 20:19:39,728 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-18 20:19:39,728 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-18 20:19:39,729 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-18 20:19:39,729 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-18 20:19:39,729 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-18 20:19:39,734 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-18 20:19:39,734 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-18 20:19:39,748 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-11-18 20:19:39,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2022-11-18 20:19:39,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:19:39,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:19:39,761 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-18 20:19:39,767 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 [2022-11-18 20:19:39,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2022-11-18 20:19:39,782 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-18 20:19:39,783 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-18 20:19:39,783 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-18 20:19:39,783 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-18 20:19:39,783 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-18 20:19:39,787 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-18 20:19:39,788 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-18 20:19:39,799 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-11-18 20:19:39,805 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-11-18 20:19:39,805 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 0 variables to zero. [2022-11-18 20:19:39,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:19:39,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:19:39,815 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-18 20:19:39,819 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-11-18 20:19:39,820 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-11-18 20:19:39,820 INFO L513 LassoAnalysis]: Proved termination. [2022-11-18 20:19:39,820 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(~r~0) = -2*~r~0 + 1 Supporting invariants [] [2022-11-18 20:19:39,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2022-11-18 20:19:39,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2022-11-18 20:19:39,835 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-11-18 20:19:39,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:19:39,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:39,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-18 20:19:39,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:19:39,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:39,934 WARN L261 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 20:19:39,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:19:40,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:19:40,175 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 4 loop predicates [2022-11-18 20:19:40,176 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 10 states and 13 transitions. cyclomatic complexity: 4 Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 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) [2022-11-18 20:19:40,309 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 10 states and 13 transitions. cyclomatic complexity: 4. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 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 35 states and 47 transitions. Complement of second has 10 states. [2022-11-18 20:19:40,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 1 stem states 3 non-accepting loop states 1 accepting loop states [2022-11-18 20:19:40,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 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) [2022-11-18 20:19:40,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 24 transitions. [2022-11-18 20:19:40,314 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 24 transitions. Stem has 4 letters. Loop has 5 letters. [2022-11-18 20:19:40,315 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-18 20:19:40,316 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 24 transitions. Stem has 9 letters. Loop has 5 letters. [2022-11-18 20:19:40,316 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-18 20:19:40,316 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 24 transitions. Stem has 4 letters. Loop has 10 letters. [2022-11-18 20:19:40,317 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-18 20:19:40,317 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 35 states and 47 transitions. [2022-11-18 20:19:40,329 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2022-11-18 20:19:40,334 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 35 states to 25 states and 33 transitions. [2022-11-18 20:19:40,334 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 18 [2022-11-18 20:19:40,335 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 20 [2022-11-18 20:19:40,335 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 33 transitions. [2022-11-18 20:19:40,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-11-18 20:19:40,335 INFO L218 hiAutomatonCegarLoop]: Abstraction has 25 states and 33 transitions. [2022-11-18 20:19:40,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 33 transitions. [2022-11-18 20:19:40,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2022-11-18 20:19:40,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 states have internal predecessors, (27), 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) [2022-11-18 20:19:40,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2022-11-18 20:19:40,343 INFO L240 hiAutomatonCegarLoop]: Abstraction has 21 states and 27 transitions. [2022-11-18 20:19:40,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:19:40,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:19:40,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:19:40,347 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 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) [2022-11-18 20:19:40,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:19:40,504 INFO L93 Difference]: Finished difference Result 27 states and 34 transitions. [2022-11-18 20:19:40,504 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 27 states and 34 transitions. [2022-11-18 20:19:40,505 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2022-11-18 20:19:40,505 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 27 states to 24 states and 31 transitions. [2022-11-18 20:19:40,506 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 24 [2022-11-18 20:19:40,506 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 24 [2022-11-18 20:19:40,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 31 transitions. [2022-11-18 20:19:40,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:19:40,506 INFO L218 hiAutomatonCegarLoop]: Abstraction has 24 states and 31 transitions. [2022-11-18 20:19:40,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 31 transitions. [2022-11-18 20:19:40,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2022-11-18 20:19:40,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 21 states have internal predecessors, (29), 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) [2022-11-18 20:19:40,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 29 transitions. [2022-11-18 20:19:40,509 INFO L240 hiAutomatonCegarLoop]: Abstraction has 22 states and 29 transitions. [2022-11-18 20:19:40,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 20:19:40,510 INFO L428 stractBuchiCegarLoop]: Abstraction has 22 states and 29 transitions. [2022-11-18 20:19:40,511 INFO L335 stractBuchiCegarLoop]: ======== Iteration 4 ============ [2022-11-18 20:19:40,511 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 22 states and 29 transitions. [2022-11-18 20:19:40,511 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 13 [2022-11-18 20:19:40,512 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-18 20:19:40,512 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-18 20:19:40,512 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:19:40,512 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1] [2022-11-18 20:19:40,513 INFO L748 eck$LassoCheckResult]: Stem: 229#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;~r~0 := 0;~s~0 := 31;~v~0 := 0;~x~0 := 0;~y~0 := 0;~z~0 := 0;~n~0 := 0; 230#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~nondet1#1, main_#t~nondet2#1, main_#t~nondet3#1, main_#t~post4#1;~v~0 := main_#t~nondet0#1;havoc main_#t~nondet0#1;~n~0 := main_#t~nondet1#1;havoc main_#t~nondet1#1;~z~0 := main_#t~nondet2#1;havoc main_#t~nondet2#1;~x~0 := main_#t~nondet3#1;havoc main_#t~nondet3#1;~r~0 := ~v~0;~y~0 := ~v~0 - 1; 234#L18-2 assume !(0 != (if 0 == ~x~0 || 0 == ~v~0 - ~y~0 - 1 then 0 else (if ~x~0 == ~v~0 - ~y~0 - 1 then ~x~0 else ~bitwiseAnd(~x~0, ~v~0 - ~y~0 - 1)))); 235#L18-3 ~v~0 := ~v~0 / 2; 236#L22-2 assume !!(~v~0 > 0);~r~0 := 2 * ~r~0; 249#L24 assume !(0 == ~v~0); 247#L24-2 assume !(1 == ~v~0);~z~0 := ~bitwiseAnd(~v~0, 1);assume ~v~0 < 0 || (~z~0 <= ~v~0 && ~z~0 <= 1);assume ~z~0 >= 0;assume ~v~0 >= 0 || ~z~0 > 1 + ~v~0; 233#L24-4 [2022-11-18 20:19:40,513 INFO L750 eck$LassoCheckResult]: Loop: 233#L24-4 assume 0 == ~r~0 || ~r~0 == ~z~0;~r~0 := ~z~0; 237#L25-3 main_#t~post4#1 := ~s~0;~s~0 := main_#t~post4#1 - 1;havoc main_#t~post4#1;~v~0 := ~v~0 / 2; 238#L22-2 assume !!(~v~0 > 0);~r~0 := 2 * ~r~0; 241#L24 assume !(0 == ~v~0); 231#L24-2 assume !(1 == ~v~0);~z~0 := ~bitwiseAnd(~v~0, 1);assume ~v~0 < 0 || (~z~0 <= ~v~0 && ~z~0 <= 1);assume ~z~0 >= 0;assume ~v~0 >= 0 || ~z~0 > 1 + ~v~0; 233#L24-4 [2022-11-18 20:19:40,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:19:40,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1808851188, now seen corresponding path program 1 times [2022-11-18 20:19:40,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:19:40,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096713985] [2022-11-18 20:19:40,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:19:40,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:19:40,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:19:40,525 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 20:19:40,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:19:40,536 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 20:19:40,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:19:40,537 INFO L85 PathProgramCache]: Analyzing trace with hash 65147123, now seen corresponding path program 1 times [2022-11-18 20:19:40,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:19:40,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925339028] [2022-11-18 20:19:40,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:19:40,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:19:40,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:19:40,544 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 20:19:40,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:19:40,551 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 20:19:40,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:19:40,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1447481312, now seen corresponding path program 1 times [2022-11-18 20:19:40,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:19:40,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677489234] [2022-11-18 20:19:40,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:19:40,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:19:40,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:40,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:19:40,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:19:40,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677489234] [2022-11-18 20:19:40,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677489234] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:19:40,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054772122] [2022-11-18 20:19:40,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:19:40,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:19:40,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:19:40,756 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:19:40,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 20:19:40,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:40,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 20:19:40,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:19:40,927 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Ended with exit code 0 [2022-11-18 20:19:40,997 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:19:40,998 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:19:40,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054772122] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:19:40,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:19:40,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 9 [2022-11-18 20:19:40,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81271000] [2022-11-18 20:19:40,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:19:41,122 INFO L210 LassoAnalysis]: Preferences: [2022-11-18 20:19:41,122 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-18 20:19:41,122 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-18 20:19:41,122 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-18 20:19:41,123 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-11-18 20:19:41,123 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:19:41,123 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-18 20:19:41,123 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-18 20:19:41,123 INFO L133 ssoRankerPreferences]: Filename of dumped script: reverse-bits1.i_Iteration4_Loop [2022-11-18 20:19:41,123 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-18 20:19:41,123 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-18 20:19:41,125 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:19:41,134 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:19:41,149 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:19:41,154 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:19:41,301 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-18 20:19:41,301 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-11-18 20:19:41,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:19:41,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:19:41,303 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-18 20:19:41,308 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-18 20:19:41,308 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-18 20:19:41,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2022-11-18 20:19:41,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2022-11-18 20:19:41,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:19:41,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:19:41,353 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-18 20:19:41,366 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-11-18 20:19:41,366 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-18 20:19:41,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2022-11-18 20:19:41,473 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-11-18 20:19:41,479 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Ended with exit code 0 [2022-11-18 20:19:41,480 INFO L210 LassoAnalysis]: Preferences: [2022-11-18 20:19:41,480 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-18 20:19:41,480 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-18 20:19:41,480 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-18 20:19:41,480 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-11-18 20:19:41,480 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:19:41,480 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-18 20:19:41,481 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-18 20:19:41,481 INFO L133 ssoRankerPreferences]: Filename of dumped script: reverse-bits1.i_Iteration4_Loop [2022-11-18 20:19:41,481 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-18 20:19:41,481 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-18 20:19:41,482 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:19:41,496 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:19:41,518 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:19:41,526 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:19:41,657 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-18 20:19:41,657 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-11-18 20:19:41,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:19:41,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:19:41,659 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-18 20:19:41,675 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 [2022-11-18 20:19:41,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2022-11-18 20:19:41,688 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-18 20:19:41,688 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-18 20:19:41,689 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-18 20:19:41,689 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-18 20:19:41,689 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-18 20:19:41,693 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-18 20:19:41,693 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-18 20:19:41,704 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-11-18 20:19:41,708 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-11-18 20:19:41,709 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2022-11-18 20:19:41,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:19:41,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:19:41,713 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-18 20:19:41,720 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-11-18 20:19:41,720 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-11-18 20:19:41,720 INFO L513 LassoAnalysis]: Proved termination. [2022-11-18 20:19:41,720 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(~v~0) = 1*~v~0 Supporting invariants [] [2022-11-18 20:19:41,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2022-11-18 20:19:41,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2022-11-18 20:19:41,731 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-11-18 20:19:41,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:19:41,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:41,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-18 20:19:41,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:19:41,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:41,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 20:19:41,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:19:41,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:19:41,820 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2022-11-18 20:19:41,820 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 22 states and 29 transitions. cyclomatic complexity: 9 Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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) [2022-11-18 20:19:41,844 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 22 states and 29 transitions. cyclomatic complexity: 9. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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 45 states and 69 transitions. Complement of second has 6 states. [2022-11-18 20:19:41,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2022-11-18 20:19:41,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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) [2022-11-18 20:19:41,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 24 transitions. [2022-11-18 20:19:41,846 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 24 transitions. Stem has 7 letters. Loop has 5 letters. [2022-11-18 20:19:41,846 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-18 20:19:41,846 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 24 transitions. Stem has 12 letters. Loop has 5 letters. [2022-11-18 20:19:41,846 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-18 20:19:41,846 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 24 transitions. Stem has 7 letters. Loop has 10 letters. [2022-11-18 20:19:41,847 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-18 20:19:41,847 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 45 states and 69 transitions. [2022-11-18 20:19:41,849 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2022-11-18 20:19:41,849 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 45 states to 15 states and 17 transitions. [2022-11-18 20:19:41,849 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 15 [2022-11-18 20:19:41,849 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 15 [2022-11-18 20:19:41,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 17 transitions. [2022-11-18 20:19:41,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:19:41,850 INFO L218 hiAutomatonCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-11-18 20:19:41,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states and 17 transitions. [2022-11-18 20:19:41,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-18 20:19:41,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 14 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) [2022-11-18 20:19:41,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2022-11-18 20:19:41,852 INFO L240 hiAutomatonCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-11-18 20:19:41,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:19:41,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:19:41,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-18 20:19:41,853 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 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) [2022-11-18 20:19:41,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:19:41,909 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2022-11-18 20:19:41,909 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 15 states and 17 transitions. [2022-11-18 20:19:41,911 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2022-11-18 20:19:41,911 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 15 states to 15 states and 17 transitions. [2022-11-18 20:19:41,912 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 15 [2022-11-18 20:19:41,912 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 15 [2022-11-18 20:19:41,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 17 transitions. [2022-11-18 20:19:41,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:19:41,913 INFO L218 hiAutomatonCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-11-18 20:19:41,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states and 17 transitions. [2022-11-18 20:19:41,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-18 20:19:41,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 14 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) [2022-11-18 20:19:41,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2022-11-18 20:19:41,916 INFO L240 hiAutomatonCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-11-18 20:19:41,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 20:19:41,918 INFO L428 stractBuchiCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-11-18 20:19:41,918 INFO L335 stractBuchiCegarLoop]: ======== Iteration 5 ============ [2022-11-18 20:19:41,918 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 15 states and 17 transitions. [2022-11-18 20:19:41,921 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2022-11-18 20:19:41,921 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-18 20:19:41,921 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-18 20:19:41,922 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:19:41,922 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1] [2022-11-18 20:19:41,923 INFO L748 eck$LassoCheckResult]: Stem: 427#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;~r~0 := 0;~s~0 := 31;~v~0 := 0;~x~0 := 0;~y~0 := 0;~z~0 := 0;~n~0 := 0; 428#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~nondet1#1, main_#t~nondet2#1, main_#t~nondet3#1, main_#t~post4#1;~v~0 := main_#t~nondet0#1;havoc main_#t~nondet0#1;~n~0 := main_#t~nondet1#1;havoc main_#t~nondet1#1;~z~0 := main_#t~nondet2#1;havoc main_#t~nondet2#1;~x~0 := main_#t~nondet3#1;havoc main_#t~nondet3#1;~r~0 := ~v~0;~y~0 := ~v~0 - 1; 431#L18-2 assume !(0 != (if 0 == ~x~0 || 0 == ~v~0 - ~y~0 - 1 then 0 else (if ~x~0 == ~v~0 - ~y~0 - 1 then ~x~0 else ~bitwiseAnd(~x~0, ~v~0 - ~y~0 - 1)))); 432#L18-3 ~v~0 := ~v~0 / 2; 433#L22-2 assume !!(~v~0 > 0);~r~0 := 2 * ~r~0; 441#L24 assume !(0 == ~v~0); 429#L24-2 assume 1 == ~v~0;~z~0 := ~v~0; 430#L24-4 assume !(0 == ~r~0 || ~r~0 == ~z~0); 436#L25-1 assume !(0 == ~z~0);~r~0 := ~bitwiseOr(~r~0, ~z~0);assume (~r~0 < 0 || ~z~0 < 0) || (~r~0 >= ~r~0 && ~r~0 >= ~z~0);assume (~r~0 >= 0 && ~z~0 >= 0) || ~r~0 < 0;assume (~r~0 < 0 || ~z~0 < 0) || ~r~0 <= ~r~0 + ~z~0; 434#L25-3 [2022-11-18 20:19:41,923 INFO L750 eck$LassoCheckResult]: Loop: 434#L25-3 main_#t~post4#1 := ~s~0;~s~0 := main_#t~post4#1 - 1;havoc main_#t~post4#1;~v~0 := ~v~0 / 2; 435#L22-2 assume !!(~v~0 > 0);~r~0 := 2 * ~r~0; 437#L24 assume !(0 == ~v~0); 438#L24-2 assume 1 == ~v~0;~z~0 := ~v~0; 439#L24-4 assume 0 == ~r~0 || ~r~0 == ~z~0;~r~0 := ~z~0; 434#L25-3 [2022-11-18 20:19:41,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:19:41,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1155763849, now seen corresponding path program 1 times [2022-11-18 20:19:41,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:19:41,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908600543] [2022-11-18 20:19:41,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:19:41,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:19:41,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:19:41,935 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 20:19:41,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:19:41,956 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 20:19:41,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:19:41,957 INFO L85 PathProgramCache]: Analyzing trace with hash 72778521, now seen corresponding path program 2 times [2022-11-18 20:19:41,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:19:41,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439302399] [2022-11-18 20:19:41,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:19:41,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:19:41,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:19:41,963 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 20:19:41,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:19:41,976 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 20:19:41,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:19:41,977 INFO L85 PathProgramCache]: Analyzing trace with hash 2008320867, now seen corresponding path program 1 times [2022-11-18 20:19:41,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:19:41,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068646288] [2022-11-18 20:19:41,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:19:41,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:19:41,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:42,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:19:42,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:19:42,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068646288] [2022-11-18 20:19:42,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068646288] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:19:42,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:19:42,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:19:42,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106970316] [2022-11-18 20:19:42,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:19:42,141 INFO L210 LassoAnalysis]: Preferences: [2022-11-18 20:19:42,141 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-18 20:19:42,141 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-18 20:19:42,141 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-18 20:19:42,141 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-11-18 20:19:42,141 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:19:42,141 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-18 20:19:42,141 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-18 20:19:42,142 INFO L133 ssoRankerPreferences]: Filename of dumped script: reverse-bits1.i_Iteration5_Loop [2022-11-18 20:19:42,142 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-18 20:19:42,142 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-18 20:19:42,143 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:19:42,145 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:19:42,158 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:19:42,269 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-18 20:19:42,269 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-11-18 20:19:42,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:19:42,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:19:42,274 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-18 20:19:42,289 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-18 20:19:42,289 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-18 20:19:42,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2022-11-18 20:19:42,314 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-18 20:19:42,314 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~post4#1=0} Honda state: {ULTIMATE.start_main_#t~post4#1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-11-18 20:19:42,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2022-11-18 20:19:42,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:19:42,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:19:42,321 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-18 20:19:42,327 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-18 20:19:42,328 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-18 20:19:42,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2022-11-18 20:19:42,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2022-11-18 20:19:42,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:19:42,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:19:42,382 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-18 20:19:42,399 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-11-18 20:19:42,399 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-18 20:19:42,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2022-11-18 20:19:42,643 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-11-18 20:19:42,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2022-11-18 20:19:42,648 INFO L210 LassoAnalysis]: Preferences: [2022-11-18 20:19:42,648 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-18 20:19:42,648 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-18 20:19:42,649 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-18 20:19:42,649 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-11-18 20:19:42,649 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:19:42,649 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-18 20:19:42,649 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-18 20:19:42,649 INFO L133 ssoRankerPreferences]: Filename of dumped script: reverse-bits1.i_Iteration5_Loop [2022-11-18 20:19:42,649 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-18 20:19:42,649 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-18 20:19:42,650 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:19:42,663 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:19:42,666 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-18 20:19:42,810 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-18 20:19:42,810 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-11-18 20:19:42,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:19:42,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:19:42,815 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-18 20:19:42,834 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 [2022-11-18 20:19:42,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2022-11-18 20:19:42,848 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-18 20:19:42,848 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-18 20:19:42,848 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-18 20:19:42,849 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-18 20:19:42,849 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-18 20:19:42,854 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-18 20:19:42,854 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-18 20:19:42,864 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-11-18 20:19:42,868 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-11-18 20:19:42,868 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 0 variables to zero. [2022-11-18 20:19:42,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-18 20:19:42,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:19:42,874 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-18 20:19:42,881 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-11-18 20:19:42,881 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-11-18 20:19:42,881 INFO L513 LassoAnalysis]: Proved termination. [2022-11-18 20:19:42,881 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(~r~0) = -2*~r~0 + 1 Supporting invariants [] [2022-11-18 20:19:42,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2022-11-18 20:19:42,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2022-11-18 20:19:42,892 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-11-18 20:19:42,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:19:42,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:42,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-18 20:19:42,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:19:42,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:42,951 WARN L261 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 20:19:42,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:19:43,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:19:43,015 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2022-11-18 20:19:43,015 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 15 states and 17 transitions. cyclomatic complexity: 3 Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2022-11-18 20:19:43,085 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 15 states and 17 transitions. cyclomatic complexity: 3. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 33 states and 40 transitions. Complement of second has 10 states. [2022-11-18 20:19:43,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 1 stem states 3 non-accepting loop states 1 accepting loop states [2022-11-18 20:19:43,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2022-11-18 20:19:43,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 24 transitions. [2022-11-18 20:19:43,091 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 24 transitions. Stem has 9 letters. Loop has 5 letters. [2022-11-18 20:19:43,092 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-18 20:19:43,092 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 24 transitions. Stem has 14 letters. Loop has 5 letters. [2022-11-18 20:19:43,092 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-18 20:19:43,092 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 24 transitions. Stem has 9 letters. Loop has 10 letters. [2022-11-18 20:19:43,093 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-18 20:19:43,093 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 33 states and 40 transitions. [2022-11-18 20:19:43,094 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2022-11-18 20:19:43,094 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 33 states to 26 states and 30 transitions. [2022-11-18 20:19:43,097 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 20 [2022-11-18 20:19:43,097 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 21 [2022-11-18 20:19:43,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 30 transitions. [2022-11-18 20:19:43,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-11-18 20:19:43,098 INFO L218 hiAutomatonCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-11-18 20:19:43,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states and 30 transitions. [2022-11-18 20:19:43,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-11-18 20:19:43,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 25 states have internal predecessors, (30), 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) [2022-11-18 20:19:43,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-11-18 20:19:43,101 INFO L240 hiAutomatonCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-11-18 20:19:43,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:19:43,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:19:43,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:19:43,103 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2022-11-18 20:19:43,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:19:43,121 INFO L93 Difference]: Finished difference Result 12 states and 11 transitions. [2022-11-18 20:19:43,121 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 12 states and 11 transitions. [2022-11-18 20:19:43,121 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2022-11-18 20:19:43,121 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 12 states to 0 states and 0 transitions. [2022-11-18 20:19:43,122 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2022-11-18 20:19:43,122 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2022-11-18 20:19:43,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2022-11-18 20:19:43,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:19:43,122 INFO L218 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-18 20:19:43,122 INFO L240 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-18 20:19:43,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:19:43,127 INFO L428 stractBuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-18 20:19:43,127 INFO L335 stractBuchiCegarLoop]: ======== Iteration 6 ============ [2022-11-18 20:19:43,127 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2022-11-18 20:19:43,127 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2022-11-18 20:19:43,128 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2022-11-18 20:19:43,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 18.11 08:19:43 BoogieIcfgContainer [2022-11-18 20:19:43,145 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2022-11-18 20:19:43,146 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-18 20:19:43,147 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-18 20:19:43,147 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-18 20:19:43,148 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:19:38" (3/4) ... [2022-11-18 20:19:43,151 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-18 20:19:43,152 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-18 20:19:43,153 INFO L158 Benchmark]: Toolchain (without parser) took 5881.37ms. Allocated memory was 119.5MB in the beginning and 159.4MB in the end (delta: 39.8MB). Free memory was 72.6MB in the beginning and 41.0MB in the end (delta: 31.6MB). Peak memory consumption was 67.8MB. Max. memory is 16.1GB. [2022-11-18 20:19:43,154 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 119.5MB. Free memory is still 89.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-18 20:19:43,155 INFO L158 Benchmark]: CACSL2BoogieTranslator took 318.74ms. Allocated memory is still 119.5MB. Free memory was 72.4MB in the beginning and 93.0MB in the end (delta: -20.5MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-11-18 20:19:43,155 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.82ms. Allocated memory is still 119.5MB. Free memory was 93.0MB in the beginning and 91.5MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-18 20:19:43,155 INFO L158 Benchmark]: Boogie Preprocessor took 26.28ms. Allocated memory is still 119.5MB. Free memory was 91.5MB in the beginning and 90.5MB in the end (delta: 979.1kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-18 20:19:43,159 INFO L158 Benchmark]: RCFGBuilder took 378.38ms. Allocated memory is still 119.5MB. Free memory was 90.5MB in the beginning and 80.0MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-18 20:19:43,159 INFO L158 Benchmark]: BuchiAutomizer took 5101.64ms. Allocated memory was 119.5MB in the beginning and 159.4MB in the end (delta: 39.8MB). Free memory was 79.6MB in the beginning and 41.0MB in the end (delta: 38.5MB). Peak memory consumption was 78.2MB. Max. memory is 16.1GB. [2022-11-18 20:19:43,160 INFO L158 Benchmark]: Witness Printer took 5.35ms. Allocated memory is still 159.4MB. Free memory is still 41.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-18 20:19:43,162 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 119.5MB. Free memory is still 89.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 318.74ms. Allocated memory is still 119.5MB. Free memory was 72.4MB in the beginning and 93.0MB in the end (delta: -20.5MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 40.82ms. Allocated memory is still 119.5MB. Free memory was 93.0MB in the beginning and 91.5MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 26.28ms. Allocated memory is still 119.5MB. Free memory was 91.5MB in the beginning and 90.5MB in the end (delta: 979.1kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 378.38ms. Allocated memory is still 119.5MB. Free memory was 90.5MB in the beginning and 80.0MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * BuchiAutomizer took 5101.64ms. Allocated memory was 119.5MB in the beginning and 159.4MB in the end (delta: 39.8MB). Free memory was 79.6MB in the beginning and 41.0MB in the end (delta: 38.5MB). Peak memory consumption was 78.2MB. Max. memory is 16.1GB. * Witness Printer took 5.35ms. Allocated memory is still 159.4MB. Free memory is still 41.0MB. There was no memory consumed. 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 8 terminating modules (5 trivial, 3 deterministic, 0 nondeterministic). One deterministic module has affine ranking function -2 * r + 1 and consists of 6 locations. One deterministic module has affine ranking function v and consists of 4 locations. One deterministic module has affine ranking function -2 * r + 1 and consists of 6 locations. 5 modules have a trivial ranking function, the largest among these consists of 6 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 5.0s and 6 iterations. TraceHistogramMax:1. Analysis of lassos took 3.6s. Construction of modules took 0.2s. Büchi inclusion checks took 0.9s. Highest rank in rank-based complementation 3. Minimization of det autom 6. Minimization of nondet autom 2. Automata minimization 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 6 StatesRemovedByMinimization, 2 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 [3, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 69 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 66 mSDsluCounter, 100 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 24 mSDsCounter, 29 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 211 IncrementalHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 29 mSolverCounterUnsat, 76 mSDtfsCounter, 211 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont0 unkn0 SFLI1 SFLT0 conc1 concLT3 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital29 mio100 ax100 hnf100 lsp71 ukn100 mio100 lsp100 div259 bol100 ite100 ukn100 eq131 hnf95 smp63 dnf115 smp100 tf104 neg100 sie100 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 51ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 1 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 3 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.6s InitialAbstractionConstructionTime: 0.0s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2022-11-18 20:19:43,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2022-11-18 20:19:43,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2022-11-18 20:19:43,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 20:19:43,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd9b0157-e414-4ad7-99e7-ca51e9e83f06/bin/uautomizer-TMbwUNV5ro/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 Result: TRUE