./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector-regression/recHanoi03-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector-regression/recHanoi03-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5a58a565ed7a29809aaccd8966118196fec0a697f2fc6db04cc260beeab4df83 ................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector-regression/recHanoi03-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5a58a565ed7a29809aaccd8966118196fec0a697f2fc6db04cc260beeab4df83 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 08:46:01,770 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 08:46:01,772 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 08:46:01,815 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 08:46:01,815 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 08:46:01,820 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 08:46:01,823 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 08:46:01,827 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 08:46:01,830 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 08:46:01,837 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 08:46:01,838 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 08:46:01,840 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 08:46:01,841 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 08:46:01,844 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 08:46:01,846 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 08:46:01,851 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 08:46:01,853 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 08:46:01,854 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 08:46:01,857 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 08:46:01,865 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 08:46:01,867 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 08:46:01,869 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 08:46:01,872 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 08:46:01,874 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 08:46:01,884 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 08:46:01,884 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 08:46:01,885 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 08:46:01,887 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 08:46:01,888 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 08:46:01,890 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 08:46:01,891 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 08:46:01,892 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 08:46:01,895 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 08:46:01,896 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 08:46:01,898 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 08:46:01,899 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 08:46:01,900 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 08:46:01,900 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 08:46:01,900 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 08:46:01,902 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 08:46:01,903 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 08:46:01,904 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-28 08:46:01,952 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 08:46:01,952 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 08:46:01,953 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 08:46:01,953 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 08:46:01,955 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 08:46:01,955 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 08:46:01,956 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 08:46:01,956 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 08:46:01,956 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 08:46:01,957 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 08:46:01,958 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 08:46:01,958 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 08:46:01,958 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-28 08:46:01,959 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 08:46:01,959 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-28 08:46:01,959 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 08:46:01,960 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 08:46:01,960 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 08:46:01,960 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-28 08:46:01,960 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 08:46:01,961 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 08:46:01,961 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 08:46:01,961 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 08:46:01,962 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 08:46:01,962 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 08:46:01,962 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-28 08:46:01,962 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 08:46:01,963 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 08:46:01,963 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-28 08:46:01,965 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-28 08:46:01,965 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-28 08:46:01,965 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 08:46:01,966 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5a58a565ed7a29809aaccd8966118196fec0a697f2fc6db04cc260beeab4df83 [2021-10-28 08:46:02,321 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 08:46:02,354 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 08:46:02,357 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 08:46:02,358 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 08:46:02,359 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 08:46:02,360 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/bitvector-regression/recHanoi03-1.c [2021-10-28 08:46:02,465 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/data/f0ac52137/da2dcd90ed0d497f8dde88f4bf0c6505/FLAG6ff90c90b [2021-10-28 08:46:03,063 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 08:46:03,064 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/sv-benchmarks/c/bitvector-regression/recHanoi03-1.c [2021-10-28 08:46:03,070 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/data/f0ac52137/da2dcd90ed0d497f8dde88f4bf0c6505/FLAG6ff90c90b [2021-10-28 08:46:03,439 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/data/f0ac52137/da2dcd90ed0d497f8dde88f4bf0c6505 [2021-10-28 08:46:03,441 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 08:46:03,444 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 08:46:03,448 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 08:46:03,448 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 08:46:03,452 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 08:46:03,454 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:46:03" (1/1) ... [2021-10-28 08:46:03,455 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58b9fa2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:46:03, skipping insertion in model container [2021-10-28 08:46:03,456 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:46:03" (1/1) ... [2021-10-28 08:46:03,466 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 08:46:03,481 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 08:46:03,673 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/sv-benchmarks/c/bitvector-regression/recHanoi03-1.c[838,851] [2021-10-28 08:46:03,676 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 08:46:03,686 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 08:46:03,700 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/sv-benchmarks/c/bitvector-regression/recHanoi03-1.c[838,851] [2021-10-28 08:46:03,701 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 08:46:03,718 INFO L208 MainTranslator]: Completed translation [2021-10-28 08:46:03,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:46:03 WrapperNode [2021-10-28 08:46:03,719 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 08:46:03,720 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 08:46:03,721 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 08:46:03,721 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 08:46:03,730 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:46:03" (1/1) ... [2021-10-28 08:46:03,738 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:46:03" (1/1) ... [2021-10-28 08:46:03,758 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 08:46:03,759 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 08:46:03,760 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 08:46:03,760 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 08:46:03,770 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:46:03" (1/1) ... [2021-10-28 08:46:03,770 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:46:03" (1/1) ... [2021-10-28 08:46:03,772 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:46:03" (1/1) ... [2021-10-28 08:46:03,772 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:46:03" (1/1) ... [2021-10-28 08:46:03,777 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:46:03" (1/1) ... [2021-10-28 08:46:03,780 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:46:03" (1/1) ... [2021-10-28 08:46:03,781 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:46:03" (1/1) ... [2021-10-28 08:46:03,783 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 08:46:03,784 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 08:46:03,785 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 08:46:03,785 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 08:46:03,786 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:46:03" (1/1) ... [2021-10-28 08:46:03,799 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 08:46:03,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:46:03,828 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 08:46:03,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 08:46:03,891 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2021-10-28 08:46:03,892 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2021-10-28 08:46:03,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 08:46:03,892 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 08:46:03,893 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 08:46:03,893 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 08:46:04,094 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 08:46:04,094 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-28 08:46:04,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:46:04 BoogieIcfgContainer [2021-10-28 08:46:04,096 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 08:46:04,100 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 08:46:04,100 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 08:46:04,121 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 08:46:04,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 08:46:03" (1/3) ... [2021-10-28 08:46:04,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dfc973d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:46:04, skipping insertion in model container [2021-10-28 08:46:04,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:46:03" (2/3) ... [2021-10-28 08:46:04,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dfc973d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:46:04, skipping insertion in model container [2021-10-28 08:46:04,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:46:04" (3/3) ... [2021-10-28 08:46:04,126 INFO L111 eAbstractionObserver]: Analyzing ICFG recHanoi03-1.c [2021-10-28 08:46:04,132 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 08:46:04,147 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-28 08:46:04,244 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 08:46:04,268 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-28 08:46:04,269 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-28 08:46:04,308 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 08:46:04,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 08:46:04,314 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:46:04,314 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:46:04,319 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:46:04,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:46:04,325 INFO L85 PathProgramCache]: Analyzing trace with hash -2087939196, now seen corresponding path program 1 times [2021-10-28 08:46:04,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:46:04,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282257048] [2021-10-28 08:46:04,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:46:04,354 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:46:04,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 08:46:04,479 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 08:46:04,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 08:46:04,577 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 08:46:04,580 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-28 08:46:04,581 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 08:46:04,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 08:46:04,593 INFO L731 BasicCegarLoop]: Path program histogram: [1] [2021-10-28 08:46:04,596 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 08:46:04,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 08:46:04 BoogieIcfgContainer [2021-10-28 08:46:04,633 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 08:46:04,636 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 08:46:04,636 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 08:46:04,637 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 08:46:04,637 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:46:04" (3/4) ... [2021-10-28 08:46:04,641 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-28 08:46:04,641 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 08:46:04,644 INFO L168 Benchmark]: Toolchain (without parser) took 1197.98 ms. Allocated memory was 77.6 MB in the beginning and 94.4 MB in the end (delta: 16.8 MB). Free memory was 57.4 MB in the beginning and 70.3 MB in the end (delta: -13.0 MB). Peak memory consumption was 4.3 MB. Max. memory is 16.1 GB. [2021-10-28 08:46:04,644 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 77.6 MB. Free memory was 56.2 MB in the beginning and 56.2 MB in the end (delta: 63.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 08:46:04,646 INFO L168 Benchmark]: CACSL2BoogieTranslator took 271.50 ms. Allocated memory was 77.6 MB in the beginning and 94.4 MB in the end (delta: 16.8 MB). Free memory was 57.1 MB in the beginning and 71.3 MB in the end (delta: -14.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-28 08:46:04,646 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.47 ms. Allocated memory is still 94.4 MB. Free memory was 71.3 MB in the beginning and 69.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 08:46:04,647 INFO L168 Benchmark]: Boogie Preprocessor took 24.30 ms. Allocated memory is still 94.4 MB. Free memory was 69.7 MB in the beginning and 68.9 MB in the end (delta: 788.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 08:46:04,648 INFO L168 Benchmark]: RCFGBuilder took 312.06 ms. Allocated memory is still 94.4 MB. Free memory was 68.9 MB in the beginning and 59.7 MB in the end (delta: 9.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-28 08:46:04,649 INFO L168 Benchmark]: TraceAbstraction took 532.88 ms. Allocated memory is still 94.4 MB. Free memory was 59.2 MB in the beginning and 70.3 MB in the end (delta: -11.1 MB). Peak memory consumption was 16.7 MB. Max. memory is 16.1 GB. [2021-10-28 08:46:04,649 INFO L168 Benchmark]: Witness Printer took 5.04 ms. Allocated memory is still 94.4 MB. Free memory is still 70.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 08:46:04,656 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 77.6 MB. Free memory was 56.2 MB in the beginning and 56.2 MB in the end (delta: 63.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 271.50 ms. Allocated memory was 77.6 MB in the beginning and 94.4 MB in the end (delta: 16.8 MB). Free memory was 57.1 MB in the beginning and 71.3 MB in the end (delta: -14.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 38.47 ms. Allocated memory is still 94.4 MB. Free memory was 71.3 MB in the beginning and 69.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.30 ms. Allocated memory is still 94.4 MB. Free memory was 69.7 MB in the beginning and 68.9 MB in the end (delta: 788.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 312.06 ms. Allocated memory is still 94.4 MB. Free memory was 68.9 MB in the beginning and 59.7 MB in the end (delta: 9.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 532.88 ms. Allocated memory is still 94.4 MB. Free memory was 59.2 MB in the beginning and 70.3 MB in the end (delta: -11.1 MB). Peak memory consumption was 16.7 MB. Max. memory is 16.1 GB. * Witness Printer took 5.04 ms. Allocated memory is still 94.4 MB. Free memory is still 70.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 36]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of shiftLeft at line 33. Possible FailurePath: [L27] int n = __VERIFIER_nondet_int(); [L28] COND FALSE !(n < 1) [L31] CALL, EXPR hanoi(n) VAL [\old(n)=1] [L19] COND TRUE n == 1 [L20] return 1; VAL [\old(n)=1, \result=1, n=1] [L31] RET, EXPR hanoi(n) [L31] unsigned result = hanoi(n); [L33] COND FALSE !(result+1>0 && result+1 == 1< main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg 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(G ! call(reach_error())) ) 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 -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5a58a565ed7a29809aaccd8966118196fec0a697f2fc6db04cc260beeab4df83 [2021-10-28 08:46:08,029 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 08:46:08,058 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 08:46:08,061 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 08:46:08,063 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 08:46:08,064 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 08:46:08,065 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/bitvector-regression/recHanoi03-1.c [2021-10-28 08:46:08,144 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/data/d56308050/684c09bc57b14d419e7feeef300a23f1/FLAGf69d96a43 [2021-10-28 08:46:08,647 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 08:46:08,647 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/sv-benchmarks/c/bitvector-regression/recHanoi03-1.c [2021-10-28 08:46:08,655 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/data/d56308050/684c09bc57b14d419e7feeef300a23f1/FLAGf69d96a43 [2021-10-28 08:46:09,014 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/data/d56308050/684c09bc57b14d419e7feeef300a23f1 [2021-10-28 08:46:09,024 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 08:46:09,026 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 08:46:09,031 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 08:46:09,032 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 08:46:09,036 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 08:46:09,037 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:46:09" (1/1) ... [2021-10-28 08:46:09,039 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79a602e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:46:09, skipping insertion in model container [2021-10-28 08:46:09,039 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:46:09" (1/1) ... [2021-10-28 08:46:09,048 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 08:46:09,065 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 08:46:09,356 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/sv-benchmarks/c/bitvector-regression/recHanoi03-1.c[838,851] [2021-10-28 08:46:09,359 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 08:46:09,373 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 08:46:09,401 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/sv-benchmarks/c/bitvector-regression/recHanoi03-1.c[838,851] [2021-10-28 08:46:09,402 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 08:46:09,423 INFO L208 MainTranslator]: Completed translation [2021-10-28 08:46:09,424 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:46:09 WrapperNode [2021-10-28 08:46:09,424 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 08:46:09,429 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 08:46:09,429 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 08:46:09,429 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 08:46:09,437 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:46:09" (1/1) ... [2021-10-28 08:46:09,448 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:46:09" (1/1) ... [2021-10-28 08:46:09,470 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 08:46:09,472 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 08:46:09,472 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 08:46:09,472 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 08:46:09,483 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:46:09" (1/1) ... [2021-10-28 08:46:09,483 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:46:09" (1/1) ... [2021-10-28 08:46:09,501 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:46:09" (1/1) ... [2021-10-28 08:46:09,502 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:46:09" (1/1) ... [2021-10-28 08:46:09,507 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:46:09" (1/1) ... [2021-10-28 08:46:09,511 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:46:09" (1/1) ... [2021-10-28 08:46:09,522 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:46:09" (1/1) ... [2021-10-28 08:46:09,524 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 08:46:09,526 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 08:46:09,527 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 08:46:09,529 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 08:46:09,530 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:46:09" (1/1) ... [2021-10-28 08:46:09,543 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 08:46:09,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:46:09,572 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 08:46:09,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 08:46:09,628 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2021-10-28 08:46:09,629 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2021-10-28 08:46:09,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 08:46:09,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 08:46:09,629 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-28 08:46:09,629 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 08:46:09,966 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 08:46:09,967 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-28 08:46:09,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:46:09 BoogieIcfgContainer [2021-10-28 08:46:09,969 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 08:46:09,971 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 08:46:09,972 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 08:46:09,975 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 08:46:09,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 08:46:09" (1/3) ... [2021-10-28 08:46:09,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d09b6e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:46:09, skipping insertion in model container [2021-10-28 08:46:09,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:46:09" (2/3) ... [2021-10-28 08:46:09,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d09b6e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:46:09, skipping insertion in model container [2021-10-28 08:46:09,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:46:09" (3/3) ... [2021-10-28 08:46:09,979 INFO L111 eAbstractionObserver]: Analyzing ICFG recHanoi03-1.c [2021-10-28 08:46:09,985 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 08:46:09,985 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-28 08:46:10,054 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 08:46:10,067 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-28 08:46:10,067 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-28 08:46:10,099 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 08:46:10,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 08:46:10,109 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:46:10,110 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:46:10,111 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:46:10,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:46:10,123 INFO L85 PathProgramCache]: Analyzing trace with hash -2087939196, now seen corresponding path program 1 times [2021-10-28 08:46:10,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:46:10,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2058679215] [2021-10-28 08:46:10,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:46:10,138 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:46:10,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:46:10,146 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:46:10,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-28 08:46:10,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:46:10,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-28 08:46:10,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:46:10,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:46:10,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:46:10,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:46:10,937 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:46:10,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2058679215] [2021-10-28 08:46:10,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2058679215] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 08:46:10,938 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:46:10,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 11 [2021-10-28 08:46:10,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939117014] [2021-10-28 08:46:10,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 08:46:10,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:46:10,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 08:46:10,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-10-28 08:46:10,965 INFO L87 Difference]: Start difference. First operand has 17 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 9 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 08:46:11,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:46:11,224 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2021-10-28 08:46:11,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 08:46:11,227 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 9 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 11 [2021-10-28 08:46:11,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:46:11,235 INFO L225 Difference]: With dead ends: 32 [2021-10-28 08:46:11,236 INFO L226 Difference]: Without dead ends: 16 [2021-10-28 08:46:11,239 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-10-28 08:46:11,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-28 08:46:11,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-10-28 08:46:11,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 12 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-28 08:46:11,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-10-28 08:46:11,276 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2021-10-28 08:46:11,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:46:11,277 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-10-28 08:46:11,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 9 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 08:46:11,277 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-10-28 08:46:11,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-28 08:46:11,279 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:46:11,279 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:46:11,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-28 08:46:11,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:46:11,488 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:46:11,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:46:11,489 INFO L85 PathProgramCache]: Analyzing trace with hash -2053638732, now seen corresponding path program 1 times [2021-10-28 08:46:11,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:46:11,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1910725418] [2021-10-28 08:46:11,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:46:11,490 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:46:11,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:46:11,492 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:46:11,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-28 08:46:11,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:46:11,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-28 08:46:11,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:46:11,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 08:46:11,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:46:12,691 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 08:46:12,693 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:46:12,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1910725418] [2021-10-28 08:46:12,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1910725418] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 08:46:12,695 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:46:12,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-28 08:46:12,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281746417] [2021-10-28 08:46:12,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-28 08:46:12,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:46:12,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-28 08:46:12,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-10-28 08:46:12,705 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 12 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-28 08:46:13,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:46:13,161 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2021-10-28 08:46:13,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 08:46:13,162 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 12 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 17 [2021-10-28 08:46:13,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:46:13,163 INFO L225 Difference]: With dead ends: 28 [2021-10-28 08:46:13,164 INFO L226 Difference]: Without dead ends: 22 [2021-10-28 08:46:13,165 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-10-28 08:46:13,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-10-28 08:46:13,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-10-28 08:46:13,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 16 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-28 08:46:13,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-10-28 08:46:13,172 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2021-10-28 08:46:13,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:46:13,173 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-10-28 08:46:13,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 12 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-28 08:46:13,173 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-10-28 08:46:13,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-28 08:46:13,175 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:46:13,175 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:46:13,187 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-10-28 08:46:13,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:46:13,387 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:46:13,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:46:13,388 INFO L85 PathProgramCache]: Analyzing trace with hash -491101836, now seen corresponding path program 2 times [2021-10-28 08:46:13,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:46:13,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [650424502] [2021-10-28 08:46:13,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 08:46:13,390 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:46:13,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:46:13,393 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:46:13,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-28 08:46:13,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 08:46:13,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:46:13,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-28 08:46:13,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:46:14,007 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-28 08:46:14,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:46:16,493 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-28 08:46:16,493 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:46:16,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [650424502] [2021-10-28 08:46:16,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [650424502] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 08:46:16,494 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:46:16,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2021-10-28 08:46:16,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057913760] [2021-10-28 08:46:16,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-28 08:46:16,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:46:16,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-28 08:46:16,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-10-28 08:46:16,497 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 26 states, 25 states have (on average 1.36) internal successors, (34), 18 states have internal predecessors, (34), 6 states have call successors, (6), 1 states have call predecessors, (6), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2021-10-28 08:46:17,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:46:17,281 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2021-10-28 08:46:17,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-28 08:46:17,289 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.36) internal successors, (34), 18 states have internal predecessors, (34), 6 states have call successors, (6), 1 states have call predecessors, (6), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 29 [2021-10-28 08:46:17,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:46:17,290 INFO L225 Difference]: With dead ends: 34 [2021-10-28 08:46:17,290 INFO L226 Difference]: Without dead ends: 28 [2021-10-28 08:46:17,292 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=182, Invalid=1150, Unknown=0, NotChecked=0, Total=1332 [2021-10-28 08:46:17,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-28 08:46:17,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-10-28 08:46:17,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 20 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (7), 6 states have call predecessors, (7), 2 states have call successors, (7) [2021-10-28 08:46:17,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-10-28 08:46:17,299 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 29 [2021-10-28 08:46:17,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:46:17,300 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-10-28 08:46:17,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.36) internal successors, (34), 18 states have internal predecessors, (34), 6 states have call successors, (6), 1 states have call predecessors, (6), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2021-10-28 08:46:17,300 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-10-28 08:46:17,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-10-28 08:46:17,302 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:46:17,302 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:46:17,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-28 08:46:17,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:46:17,503 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:46:17,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:46:17,504 INFO L85 PathProgramCache]: Analyzing trace with hash -492655308, now seen corresponding path program 3 times [2021-10-28 08:46:17,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:46:17,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2111043538] [2021-10-28 08:46:17,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 08:46:17,505 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:46:17,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:46:17,506 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:46:17,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-28 08:46:17,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-10-28 08:46:17,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:46:17,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-28 08:46:17,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:46:18,139 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-10-28 08:46:18,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:46:22,108 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-28 08:46:22,109 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:46:22,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2111043538] [2021-10-28 08:46:22,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2111043538] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 08:46:22,109 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:46:22,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21] total 36 [2021-10-28 08:46:22,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736678209] [2021-10-28 08:46:22,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-28 08:46:22,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:46:22,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-28 08:46:22,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1141, Unknown=0, NotChecked=0, Total=1260 [2021-10-28 08:46:22,115 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 36 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 24 states have internal predecessors, (46), 8 states have call successors, (8), 1 states have call predecessors, (8), 12 states have return successors, (12), 12 states have call predecessors, (12), 8 states have call successors, (12) [2021-10-28 08:46:23,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:46:23,308 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2021-10-28 08:46:23,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-28 08:46:23,309 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 24 states have internal predecessors, (46), 8 states have call successors, (8), 1 states have call predecessors, (8), 12 states have return successors, (12), 12 states have call predecessors, (12), 8 states have call successors, (12) Word has length 41 [2021-10-28 08:46:23,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:46:23,311 INFO L225 Difference]: With dead ends: 40 [2021-10-28 08:46:23,311 INFO L226 Difference]: Without dead ends: 34 [2021-10-28 08:46:23,313 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=290, Invalid=2260, Unknown=0, NotChecked=0, Total=2550 [2021-10-28 08:46:23,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-10-28 08:46:23,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-10-28 08:46:23,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 24 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2021-10-28 08:46:23,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2021-10-28 08:46:23,322 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 41 [2021-10-28 08:46:23,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:46:23,322 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2021-10-28 08:46:23,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 24 states have internal predecessors, (46), 8 states have call successors, (8), 1 states have call predecessors, (8), 12 states have return successors, (12), 12 states have call predecessors, (12), 8 states have call successors, (12) [2021-10-28 08:46:23,323 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2021-10-28 08:46:23,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-10-28 08:46:23,325 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:46:23,326 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:46:23,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-28 08:46:23,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:46:23,539 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:46:23,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:46:23,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1906255628, now seen corresponding path program 4 times [2021-10-28 08:46:23,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:46:23,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1264979767] [2021-10-28 08:46:23,540 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 08:46:23,540 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:46:23,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:46:23,541 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:46:23,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-28 08:46:23,686 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 08:46:23,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:46:23,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-28 08:46:23,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:46:24,286 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-10-28 08:46:24,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:46:29,757 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-28 08:46:29,757 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:46:29,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1264979767] [2021-10-28 08:46:29,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1264979767] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 08:46:29,758 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:46:29,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 27] total 46 [2021-10-28 08:46:29,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277918418] [2021-10-28 08:46:29,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-10-28 08:46:29,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:46:29,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-10-28 08:46:29,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1913, Unknown=0, NotChecked=0, Total=2070 [2021-10-28 08:46:29,762 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 46 states, 45 states have (on average 1.288888888888889) internal successors, (58), 30 states have internal predecessors, (58), 10 states have call successors, (10), 1 states have call predecessors, (10), 16 states have return successors, (16), 16 states have call predecessors, (16), 10 states have call successors, (16) [2021-10-28 08:46:31,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:46:31,311 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2021-10-28 08:46:31,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-28 08:46:31,312 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 1.288888888888889) internal successors, (58), 30 states have internal predecessors, (58), 10 states have call successors, (10), 1 states have call predecessors, (10), 16 states have return successors, (16), 16 states have call predecessors, (16), 10 states have call successors, (16) Word has length 53 [2021-10-28 08:46:31,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:46:31,313 INFO L225 Difference]: With dead ends: 46 [2021-10-28 08:46:31,313 INFO L226 Difference]: Without dead ends: 40 [2021-10-28 08:46:31,315 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=414, Invalid=3746, Unknown=0, NotChecked=0, Total=4160 [2021-10-28 08:46:31,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-10-28 08:46:31,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-10-28 08:46:31,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.037037037037037) internal successors, (28), 28 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (11), 10 states have call predecessors, (11), 2 states have call successors, (11) [2021-10-28 08:46:31,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-10-28 08:46:31,323 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 53 [2021-10-28 08:46:31,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:46:31,324 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-10-28 08:46:31,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 1.288888888888889) internal successors, (58), 30 states have internal predecessors, (58), 10 states have call successors, (10), 1 states have call predecessors, (10), 16 states have return successors, (16), 16 states have call predecessors, (16), 10 states have call successors, (16) [2021-10-28 08:46:31,325 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-10-28 08:46:31,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-10-28 08:46:31,327 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:46:31,327 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:46:31,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-28 08:46:31,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:46:31,538 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:46:31,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:46:31,539 INFO L85 PathProgramCache]: Analyzing trace with hash 788849844, now seen corresponding path program 5 times [2021-10-28 08:46:31,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:46:31,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [896820943] [2021-10-28 08:46:31,540 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 08:46:31,540 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:46:31,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:46:31,541 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:46:31,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-28 08:46:31,752 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-10-28 08:46:31,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:46:31,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 44 conjunts are in the unsatisfiable core [2021-10-28 08:46:31,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:46:32,479 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-10-28 08:46:32,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:46:40,667 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-10-28 08:46:40,668 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:46:40,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [896820943] [2021-10-28 08:46:40,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [896820943] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 08:46:40,668 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:46:40,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 33] total 56 [2021-10-28 08:46:40,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521095264] [2021-10-28 08:46:40,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-10-28 08:46:40,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:46:40,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-10-28 08:46:40,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=2885, Unknown=0, NotChecked=0, Total=3080 [2021-10-28 08:46:40,672 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 56 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 36 states have internal predecessors, (70), 12 states have call successors, (12), 1 states have call predecessors, (12), 20 states have return successors, (20), 20 states have call predecessors, (20), 12 states have call successors, (20) [2021-10-28 08:46:43,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:46:43,094 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2021-10-28 08:46:43,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-28 08:46:43,095 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 36 states have internal predecessors, (70), 12 states have call successors, (12), 1 states have call predecessors, (12), 20 states have return successors, (20), 20 states have call predecessors, (20), 12 states have call successors, (20) Word has length 65 [2021-10-28 08:46:43,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:46:43,096 INFO L225 Difference]: With dead ends: 52 [2021-10-28 08:46:43,096 INFO L226 Difference]: Without dead ends: 46 [2021-10-28 08:46:43,099 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=554, Invalid=5608, Unknown=0, NotChecked=0, Total=6162 [2021-10-28 08:46:43,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-10-28 08:46:43,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-10-28 08:46:43,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.032258064516129) internal successors, (32), 32 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (13), 12 states have call predecessors, (13), 2 states have call successors, (13) [2021-10-28 08:46:43,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2021-10-28 08:46:43,110 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 65 [2021-10-28 08:46:43,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:46:43,114 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2021-10-28 08:46:43,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 36 states have internal predecessors, (70), 12 states have call successors, (12), 1 states have call predecessors, (12), 20 states have return successors, (20), 20 states have call predecessors, (20), 12 states have call successors, (20) [2021-10-28 08:46:43,114 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2021-10-28 08:46:43,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-10-28 08:46:43,116 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:46:43,117 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:46:43,127 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-10-28 08:46:43,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:46:43,319 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:46:43,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:46:43,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1302253684, now seen corresponding path program 6 times [2021-10-28 08:46:43,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:46:43,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2142391989] [2021-10-28 08:46:43,321 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 08:46:43,321 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:46:43,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:46:43,322 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:46:43,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-28 08:46:43,652 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-10-28 08:46:43,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:46:43,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 52 conjunts are in the unsatisfiable core [2021-10-28 08:46:43,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:46:44,526 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-10-28 08:46:44,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:46:54,640 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-10-28 08:46:54,640 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:46:54,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2142391989] [2021-10-28 08:46:54,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2142391989] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 08:46:54,640 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:46:54,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 39] total 66 [2021-10-28 08:46:54,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534108005] [2021-10-28 08:46:54,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-10-28 08:46:54,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:46:54,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-10-28 08:46:54,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=4057, Unknown=0, NotChecked=0, Total=4290 [2021-10-28 08:46:54,645 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand has 66 states, 65 states have (on average 1.2615384615384615) internal successors, (82), 42 states have internal predecessors, (82), 14 states have call successors, (14), 1 states have call predecessors, (14), 24 states have return successors, (24), 24 states have call predecessors, (24), 14 states have call successors, (24) [2021-10-28 08:46:57,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:46:57,802 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2021-10-28 08:46:57,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-28 08:46:57,804 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 1.2615384615384615) internal successors, (82), 42 states have internal predecessors, (82), 14 states have call successors, (14), 1 states have call predecessors, (14), 24 states have return successors, (24), 24 states have call predecessors, (24), 14 states have call successors, (24) Word has length 77 [2021-10-28 08:46:57,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:46:57,807 INFO L225 Difference]: With dead ends: 58 [2021-10-28 08:46:57,807 INFO L226 Difference]: Without dead ends: 52 [2021-10-28 08:46:57,811 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1120 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=710, Invalid=7846, Unknown=0, NotChecked=0, Total=8556 [2021-10-28 08:46:57,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-10-28 08:46:57,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-10-28 08:46:57,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 36 states have internal predecessors, (36), 2 states have call successors, (2), 1 states have call predecessors, (2), 14 states have return successors, (15), 14 states have call predecessors, (15), 2 states have call successors, (15) [2021-10-28 08:46:57,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2021-10-28 08:46:57,820 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 77 [2021-10-28 08:46:57,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:46:57,821 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2021-10-28 08:46:57,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 65 states have (on average 1.2615384615384615) internal successors, (82), 42 states have internal predecessors, (82), 14 states have call successors, (14), 1 states have call predecessors, (14), 24 states have return successors, (24), 24 states have call predecessors, (24), 14 states have call successors, (24) [2021-10-28 08:46:57,822 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2021-10-28 08:46:57,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-10-28 08:46:57,824 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:46:57,825 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:46:57,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-28 08:46:58,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:46:58,048 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:46:58,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:46:58,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1287742412, now seen corresponding path program 7 times [2021-10-28 08:46:58,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:46:58,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1480851155] [2021-10-28 08:46:58,050 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 08:46:58,055 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:46:58,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:46:58,056 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:46:58,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-28 08:46:58,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:46:58,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 60 conjunts are in the unsatisfiable core [2021-10-28 08:46:58,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:46:59,716 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-10-28 08:46:59,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:47:13,016 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-10-28 08:47:13,016 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:47:13,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1480851155] [2021-10-28 08:47:13,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1480851155] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 08:47:13,017 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:47:13,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 45] total 76 [2021-10-28 08:47:13,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666224097] [2021-10-28 08:47:13,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-10-28 08:47:13,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:47:13,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-10-28 08:47:13,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=5429, Unknown=0, NotChecked=0, Total=5700 [2021-10-28 08:47:13,022 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 76 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 48 states have internal predecessors, (94), 16 states have call successors, (16), 1 states have call predecessors, (16), 28 states have return successors, (28), 28 states have call predecessors, (28), 16 states have call successors, (28) [2021-10-28 08:47:16,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:47:16,908 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2021-10-28 08:47:16,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-28 08:47:16,909 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 48 states have internal predecessors, (94), 16 states have call successors, (16), 1 states have call predecessors, (16), 28 states have return successors, (28), 28 states have call predecessors, (28), 16 states have call successors, (28) Word has length 89 [2021-10-28 08:47:16,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:47:16,910 INFO L225 Difference]: With dead ends: 64 [2021-10-28 08:47:16,911 INFO L226 Difference]: Without dead ends: 58 [2021-10-28 08:47:16,916 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1487 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=882, Invalid=10460, Unknown=0, NotChecked=0, Total=11342 [2021-10-28 08:47:16,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-10-28 08:47:16,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-10-28 08:47:16,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 40 states have internal predecessors, (40), 2 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (17), 16 states have call predecessors, (17), 2 states have call successors, (17) [2021-10-28 08:47:16,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2021-10-28 08:47:16,925 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 89 [2021-10-28 08:47:16,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:47:16,926 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2021-10-28 08:47:16,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 48 states have internal predecessors, (94), 16 states have call successors, (16), 1 states have call predecessors, (16), 28 states have return successors, (28), 28 states have call predecessors, (28), 16 states have call successors, (28) [2021-10-28 08:47:16,927 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2021-10-28 08:47:16,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-10-28 08:47:16,929 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:47:16,929 INFO L513 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:47:16,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-28 08:47:17,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:47:17,139 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:47:17,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:47:17,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1760839668, now seen corresponding path program 8 times [2021-10-28 08:47:17,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:47:17,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [838116008] [2021-10-28 08:47:17,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 08:47:17,141 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:47:17,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:47:17,142 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:47:17,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-28 08:47:17,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 08:47:17,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:47:17,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 68 conjunts are in the unsatisfiable core [2021-10-28 08:47:17,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:47:18,939 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2021-10-28 08:47:18,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:47:36,096 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-10-28 08:47:36,097 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:47:36,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [838116008] [2021-10-28 08:47:36,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [838116008] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 08:47:36,097 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:47:36,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 51] total 86 [2021-10-28 08:47:36,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952033439] [2021-10-28 08:47:36,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-10-28 08:47:36,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:47:36,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-10-28 08:47:36,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=7001, Unknown=0, NotChecked=0, Total=7310 [2021-10-28 08:47:36,102 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand has 86 states, 85 states have (on average 1.2470588235294118) internal successors, (106), 54 states have internal predecessors, (106), 18 states have call successors, (18), 1 states have call predecessors, (18), 32 states have return successors, (32), 32 states have call predecessors, (32), 18 states have call successors, (32) [2021-10-28 08:47:40,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:47:40,876 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2021-10-28 08:47:40,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-10-28 08:47:40,877 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 85 states have (on average 1.2470588235294118) internal successors, (106), 54 states have internal predecessors, (106), 18 states have call successors, (18), 1 states have call predecessors, (18), 32 states have return successors, (32), 32 states have call predecessors, (32), 18 states have call successors, (32) Word has length 101 [2021-10-28 08:47:40,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:47:40,879 INFO L225 Difference]: With dead ends: 70 [2021-10-28 08:47:40,879 INFO L226 Difference]: Without dead ends: 64 [2021-10-28 08:47:40,883 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1906 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=1070, Invalid=13450, Unknown=0, NotChecked=0, Total=14520 [2021-10-28 08:47:40,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-28 08:47:40,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-10-28 08:47:40,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 44 states have internal predecessors, (44), 2 states have call successors, (2), 1 states have call predecessors, (2), 18 states have return successors, (19), 18 states have call predecessors, (19), 2 states have call successors, (19) [2021-10-28 08:47:40,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2021-10-28 08:47:40,891 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 101 [2021-10-28 08:47:40,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:47:40,892 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2021-10-28 08:47:40,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 85 states have (on average 1.2470588235294118) internal successors, (106), 54 states have internal predecessors, (106), 18 states have call successors, (18), 1 states have call predecessors, (18), 32 states have return successors, (32), 32 states have call predecessors, (32), 18 states have call successors, (32) [2021-10-28 08:47:40,893 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2021-10-28 08:47:40,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-10-28 08:47:40,895 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:47:40,895 INFO L513 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:47:40,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-28 08:47:41,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:47:41,099 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:47:41,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:47:41,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1211116620, now seen corresponding path program 9 times [2021-10-28 08:47:41,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:47:41,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2114058956] [2021-10-28 08:47:41,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 08:47:41,100 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:47:41,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:47:41,101 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:47:41,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-28 08:47:41,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-10-28 08:47:41,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:47:41,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 76 conjunts are in the unsatisfiable core [2021-10-28 08:47:41,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:47:43,128 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-10-28 08:47:43,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:48:03,689 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 731 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-10-28 08:48:03,689 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:48:03,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2114058956] [2021-10-28 08:48:03,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2114058956] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 08:48:03,689 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:48:03,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 57] total 96 [2021-10-28 08:48:03,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619831657] [2021-10-28 08:48:03,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-10-28 08:48:03,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:48:03,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-10-28 08:48:03,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=8773, Unknown=0, NotChecked=0, Total=9120 [2021-10-28 08:48:03,693 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand has 96 states, 95 states have (on average 1.2421052631578948) internal successors, (118), 60 states have internal predecessors, (118), 20 states have call successors, (20), 1 states have call predecessors, (20), 36 states have return successors, (36), 36 states have call predecessors, (36), 20 states have call successors, (36) [2021-10-28 08:48:09,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:48:09,670 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2021-10-28 08:48:09,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-10-28 08:48:09,671 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 95 states have (on average 1.2421052631578948) internal successors, (118), 60 states have internal predecessors, (118), 20 states have call successors, (20), 1 states have call predecessors, (20), 36 states have return successors, (36), 36 states have call predecessors, (36), 20 states have call successors, (36) Word has length 113 [2021-10-28 08:48:09,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:48:09,673 INFO L225 Difference]: With dead ends: 76 [2021-10-28 08:48:09,673 INFO L226 Difference]: Without dead ends: 70 [2021-10-28 08:48:09,676 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2377 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=1274, Invalid=16816, Unknown=0, NotChecked=0, Total=18090 [2021-10-28 08:48:09,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-10-28 08:48:09,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-10-28 08:48:09,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 48 states have internal predecessors, (48), 2 states have call successors, (2), 1 states have call predecessors, (2), 20 states have return successors, (21), 20 states have call predecessors, (21), 2 states have call successors, (21) [2021-10-28 08:48:09,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2021-10-28 08:48:09,685 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 113 [2021-10-28 08:48:09,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:48:09,686 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2021-10-28 08:48:09,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 95 states have (on average 1.2421052631578948) internal successors, (118), 60 states have internal predecessors, (118), 20 states have call successors, (20), 1 states have call predecessors, (20), 36 states have return successors, (36), 36 states have call predecessors, (36), 20 states have call successors, (36) [2021-10-28 08:48:09,687 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2021-10-28 08:48:09,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-10-28 08:48:09,689 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:48:09,689 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:48:09,704 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-10-28 08:48:09,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:48:09,903 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:48:09,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:48:09,904 INFO L85 PathProgramCache]: Analyzing trace with hash 685850484, now seen corresponding path program 10 times [2021-10-28 08:48:09,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:48:09,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [406119420] [2021-10-28 08:48:09,905 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 08:48:09,905 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:48:09,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:48:09,906 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:48:09,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-28 08:48:10,693 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 08:48:10,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:48:10,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 84 conjunts are in the unsatisfiable core [2021-10-28 08:48:10,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:48:12,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2021-10-28 08:48:12,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:48:39,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 912 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-10-28 08:48:39,072 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:48:39,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [406119420] [2021-10-28 08:48:39,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [406119420] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 08:48:39,073 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:48:39,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 63] total 106 [2021-10-28 08:48:39,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721020985] [2021-10-28 08:48:39,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2021-10-28 08:48:39,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:48:39,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2021-10-28 08:48:39,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=10745, Unknown=0, NotChecked=0, Total=11130 [2021-10-28 08:48:39,081 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand has 106 states, 105 states have (on average 1.2380952380952381) internal successors, (130), 66 states have internal predecessors, (130), 22 states have call successors, (22), 1 states have call predecessors, (22), 40 states have return successors, (40), 40 states have call predecessors, (40), 22 states have call successors, (40) [2021-10-28 08:48:45,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:48:45,801 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2021-10-28 08:48:45,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-10-28 08:48:45,802 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 105 states have (on average 1.2380952380952381) internal successors, (130), 66 states have internal predecessors, (130), 22 states have call successors, (22), 1 states have call predecessors, (22), 40 states have return successors, (40), 40 states have call predecessors, (40), 22 states have call successors, (40) Word has length 125 [2021-10-28 08:48:45,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:48:45,804 INFO L225 Difference]: With dead ends: 82 [2021-10-28 08:48:45,804 INFO L226 Difference]: Without dead ends: 76 [2021-10-28 08:48:45,807 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2900 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=1494, Invalid=20558, Unknown=0, NotChecked=0, Total=22052 [2021-10-28 08:48:45,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-10-28 08:48:45,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-10-28 08:48:45,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 52 states have internal predecessors, (52), 2 states have call successors, (2), 1 states have call predecessors, (2), 22 states have return successors, (23), 22 states have call predecessors, (23), 2 states have call successors, (23) [2021-10-28 08:48:45,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2021-10-28 08:48:45,816 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 125 [2021-10-28 08:48:45,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:48:45,817 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2021-10-28 08:48:45,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 105 states have (on average 1.2380952380952381) internal successors, (130), 66 states have internal predecessors, (130), 22 states have call successors, (22), 1 states have call predecessors, (22), 40 states have return successors, (40), 40 states have call predecessors, (40), 22 states have call successors, (40) [2021-10-28 08:48:45,818 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2021-10-28 08:48:45,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-10-28 08:48:45,820 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:48:45,820 INFO L513 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:48:45,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-28 08:48:46,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:48:46,035 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:48:46,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:48:46,035 INFO L85 PathProgramCache]: Analyzing trace with hash -2059891916, now seen corresponding path program 11 times [2021-10-28 08:48:46,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:48:46,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [435296568] [2021-10-28 08:48:46,036 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 08:48:46,036 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:48:46,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:48:46,037 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:48:46,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-28 08:48:47,042 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2021-10-28 08:48:47,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:48:47,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 92 conjunts are in the unsatisfiable core [2021-10-28 08:48:47,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:48:48,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2021-10-28 08:48:48,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:49:17,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 1113 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-10-28 08:49:17,272 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:49:17,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [435296568] [2021-10-28 08:49:17,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [435296568] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 08:49:17,273 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:49:17,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 69] total 116 [2021-10-28 08:49:17,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491384020] [2021-10-28 08:49:17,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2021-10-28 08:49:17,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:49:17,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2021-10-28 08:49:17,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=12917, Unknown=0, NotChecked=0, Total=13340 [2021-10-28 08:49:17,276 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand has 116 states, 115 states have (on average 1.2347826086956522) internal successors, (142), 72 states have internal predecessors, (142), 24 states have call successors, (24), 1 states have call predecessors, (24), 44 states have return successors, (44), 44 states have call predecessors, (44), 24 states have call successors, (44) [2021-10-28 08:49:25,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:49:25,131 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2021-10-28 08:49:25,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-10-28 08:49:25,135 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 115 states have (on average 1.2347826086956522) internal successors, (142), 72 states have internal predecessors, (142), 24 states have call successors, (24), 1 states have call predecessors, (24), 44 states have return successors, (44), 44 states have call predecessors, (44), 24 states have call successors, (44) Word has length 137 [2021-10-28 08:49:25,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:49:25,136 INFO L225 Difference]: With dead ends: 88 [2021-10-28 08:49:25,136 INFO L226 Difference]: Without dead ends: 82 [2021-10-28 08:49:25,138 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3475 ImplicationChecksByTransitivity, 21.0s TimeCoverageRelationStatistics Valid=1730, Invalid=24676, Unknown=0, NotChecked=0, Total=26406 [2021-10-28 08:49:25,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-10-28 08:49:25,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-10-28 08:49:25,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 55 states have (on average 1.018181818181818) internal successors, (56), 56 states have internal predecessors, (56), 2 states have call successors, (2), 1 states have call predecessors, (2), 24 states have return successors, (25), 24 states have call predecessors, (25), 2 states have call successors, (25) [2021-10-28 08:49:25,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2021-10-28 08:49:25,145 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 137 [2021-10-28 08:49:25,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:49:25,146 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2021-10-28 08:49:25,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 115 states have (on average 1.2347826086956522) internal successors, (142), 72 states have internal predecessors, (142), 24 states have call successors, (24), 1 states have call predecessors, (24), 44 states have return successors, (44), 44 states have call predecessors, (44), 24 states have call successors, (44) [2021-10-28 08:49:25,147 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2021-10-28 08:49:25,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-10-28 08:49:25,149 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:49:25,149 INFO L513 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:49:25,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-28 08:49:25,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:49:25,362 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:49:25,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:49:25,362 INFO L85 PathProgramCache]: Analyzing trace with hash -706365708, now seen corresponding path program 12 times [2021-10-28 08:49:25,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:49:25,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [10027175] [2021-10-28 08:49:25,363 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 08:49:25,363 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:49:25,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:49:25,364 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:49:25,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-28 08:49:26,634 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2021-10-28 08:49:26,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:49:26,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 100 conjunts are in the unsatisfiable core [2021-10-28 08:49:26,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:49:28,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-10-28 08:49:28,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:50:02,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 1334 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-10-28 08:50:02,915 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:50:02,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [10027175] [2021-10-28 08:50:02,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [10027175] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 08:50:02,915 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:50:02,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 75] total 126 [2021-10-28 08:50:02,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097267667] [2021-10-28 08:50:02,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2021-10-28 08:50:02,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:50:02,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2021-10-28 08:50:02,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=15289, Unknown=0, NotChecked=0, Total=15750 [2021-10-28 08:50:02,918 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand has 126 states, 125 states have (on average 1.232) internal successors, (154), 78 states have internal predecessors, (154), 26 states have call successors, (26), 1 states have call predecessors, (26), 48 states have return successors, (48), 48 states have call predecessors, (48), 26 states have call successors, (48) [2021-10-28 08:50:11,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:50:11,609 INFO L93 Difference]: Finished difference Result 94 states and 96 transitions. [2021-10-28 08:50:11,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-10-28 08:50:11,610 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 125 states have (on average 1.232) internal successors, (154), 78 states have internal predecessors, (154), 26 states have call successors, (26), 1 states have call predecessors, (26), 48 states have return successors, (48), 48 states have call predecessors, (48), 26 states have call successors, (48) Word has length 149 [2021-10-28 08:50:11,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:50:11,611 INFO L225 Difference]: With dead ends: 94 [2021-10-28 08:50:11,611 INFO L226 Difference]: Without dead ends: 88 [2021-10-28 08:50:11,613 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4102 ImplicationChecksByTransitivity, 25.0s TimeCoverageRelationStatistics Valid=1982, Invalid=29170, Unknown=0, NotChecked=0, Total=31152 [2021-10-28 08:50:11,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-10-28 08:50:11,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2021-10-28 08:50:11,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 59 states have (on average 1.0169491525423728) internal successors, (60), 60 states have internal predecessors, (60), 2 states have call successors, (2), 1 states have call predecessors, (2), 26 states have return successors, (27), 26 states have call predecessors, (27), 2 states have call successors, (27) [2021-10-28 08:50:11,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2021-10-28 08:50:11,620 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 149 [2021-10-28 08:50:11,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:50:11,621 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2021-10-28 08:50:11,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 125 states have (on average 1.232) internal successors, (154), 78 states have internal predecessors, (154), 26 states have call successors, (26), 1 states have call predecessors, (26), 48 states have return successors, (48), 48 states have call predecessors, (48), 26 states have call successors, (48) [2021-10-28 08:50:11,622 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2021-10-28 08:50:11,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-10-28 08:50:11,624 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:50:11,624 INFO L513 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:50:11,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-28 08:50:11,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:50:11,844 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:50:11,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:50:11,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1677247156, now seen corresponding path program 13 times [2021-10-28 08:50:11,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:50:11,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [832541231] [2021-10-28 08:50:11,845 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 08:50:11,845 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:50:11,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:50:11,846 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:50:11,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-28 08:50:13,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:50:13,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 108 conjunts are in the unsatisfiable core [2021-10-28 08:50:13,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:50:15,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2021-10-28 08:50:15,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:50:56,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 1575 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-10-28 08:50:56,274 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:50:56,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [832541231] [2021-10-28 08:50:56,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [832541231] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 08:50:56,274 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:50:56,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 81] total 136 [2021-10-28 08:50:56,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135440993] [2021-10-28 08:50:56,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2021-10-28 08:50:56,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:50:56,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2021-10-28 08:50:56,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=499, Invalid=17861, Unknown=0, NotChecked=0, Total=18360 [2021-10-28 08:50:56,278 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand has 136 states, 135 states have (on average 1.2296296296296296) internal successors, (166), 84 states have internal predecessors, (166), 28 states have call successors, (28), 1 states have call predecessors, (28), 52 states have return successors, (52), 52 states have call predecessors, (52), 28 states have call successors, (52) [2021-10-28 08:51:07,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:51:07,936 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2021-10-28 08:51:07,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-10-28 08:51:07,938 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 135 states have (on average 1.2296296296296296) internal successors, (166), 84 states have internal predecessors, (166), 28 states have call successors, (28), 1 states have call predecessors, (28), 52 states have return successors, (52), 52 states have call predecessors, (52), 28 states have call successors, (52) Word has length 161 [2021-10-28 08:51:07,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:51:07,940 INFO L225 Difference]: With dead ends: 100 [2021-10-28 08:51:07,940 INFO L226 Difference]: Without dead ends: 94 [2021-10-28 08:51:07,942 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4781 ImplicationChecksByTransitivity, 31.3s TimeCoverageRelationStatistics Valid=2250, Invalid=34040, Unknown=0, NotChecked=0, Total=36290 [2021-10-28 08:51:07,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-10-28 08:51:07,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-10-28 08:51:07,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 63 states have (on average 1.0158730158730158) internal successors, (64), 64 states have internal predecessors, (64), 2 states have call successors, (2), 1 states have call predecessors, (2), 28 states have return successors, (29), 28 states have call predecessors, (29), 2 states have call successors, (29) [2021-10-28 08:51:07,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2021-10-28 08:51:07,951 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 161 [2021-10-28 08:51:07,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:51:07,952 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2021-10-28 08:51:07,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 135 states have (on average 1.2296296296296296) internal successors, (166), 84 states have internal predecessors, (166), 28 states have call successors, (28), 1 states have call predecessors, (28), 52 states have return successors, (52), 52 states have call predecessors, (52), 28 states have call successors, (52) [2021-10-28 08:51:07,953 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2021-10-28 08:51:07,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-10-28 08:51:07,956 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:51:07,957 INFO L513 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:51:07,991 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-10-28 08:51:08,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:51:08,180 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:51:08,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:51:08,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1199460748, now seen corresponding path program 14 times [2021-10-28 08:51:08,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:51:08,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [682336781] [2021-10-28 08:51:08,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 08:51:08,181 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:51:08,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:51:08,182 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:51:08,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-28 08:51:10,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 08:51:10,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:51:10,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 116 conjunts are in the unsatisfiable core [2021-10-28 08:51:10,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:51:13,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2021-10-28 08:51:13,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:52:02,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 1836 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-10-28 08:52:02,641 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:52:02,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [682336781] [2021-10-28 08:52:02,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [682336781] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 08:52:02,641 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:52:02,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 87] total 146 [2021-10-28 08:52:02,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318215804] [2021-10-28 08:52:02,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2021-10-28 08:52:02,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:52:02,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2021-10-28 08:52:02,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=537, Invalid=20633, Unknown=0, NotChecked=0, Total=21170 [2021-10-28 08:52:02,645 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand has 146 states, 145 states have (on average 1.2275862068965517) internal successors, (178), 90 states have internal predecessors, (178), 30 states have call successors, (30), 1 states have call predecessors, (30), 56 states have return successors, (56), 56 states have call predecessors, (56), 30 states have call successors, (56) [2021-10-28 08:52:15,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:52:15,055 INFO L93 Difference]: Finished difference Result 106 states and 108 transitions. [2021-10-28 08:52:15,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-10-28 08:52:15,056 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 145 states have (on average 1.2275862068965517) internal successors, (178), 90 states have internal predecessors, (178), 30 states have call successors, (30), 1 states have call predecessors, (30), 56 states have return successors, (56), 56 states have call predecessors, (56), 30 states have call successors, (56) Word has length 173 [2021-10-28 08:52:15,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:52:15,058 INFO L225 Difference]: With dead ends: 106 [2021-10-28 08:52:15,058 INFO L226 Difference]: Without dead ends: 100 [2021-10-28 08:52:15,061 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5512 ImplicationChecksByTransitivity, 36.7s TimeCoverageRelationStatistics Valid=2534, Invalid=39286, Unknown=0, NotChecked=0, Total=41820 [2021-10-28 08:52:15,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-10-28 08:52:15,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2021-10-28 08:52:15,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 67 states have (on average 1.0149253731343284) internal successors, (68), 68 states have internal predecessors, (68), 2 states have call successors, (2), 1 states have call predecessors, (2), 30 states have return successors, (31), 30 states have call predecessors, (31), 2 states have call successors, (31) [2021-10-28 08:52:15,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2021-10-28 08:52:15,069 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 173 [2021-10-28 08:52:15,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:52:15,070 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2021-10-28 08:52:15,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 145 states have (on average 1.2275862068965517) internal successors, (178), 90 states have internal predecessors, (178), 30 states have call successors, (30), 1 states have call predecessors, (30), 56 states have return successors, (56), 56 states have call predecessors, (56), 30 states have call successors, (56) [2021-10-28 08:52:15,071 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2021-10-28 08:52:15,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-10-28 08:52:15,073 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:52:15,073 INFO L513 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:52:15,087 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-10-28 08:52:15,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:52:15,279 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:52:15,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:52:15,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1668253132, now seen corresponding path program 15 times [2021-10-28 08:52:15,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:52:15,280 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1279438719] [2021-10-28 08:52:15,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 08:52:15,281 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:52:15,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:52:15,282 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:52:15,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-28 08:52:17,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2021-10-28 08:52:17,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:52:17,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 124 conjunts are in the unsatisfiable core [2021-10-28 08:52:17,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:52:20,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2021-10-28 08:52:20,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:53:16,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 2117 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-10-28 08:53:16,699 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:53:16,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1279438719] [2021-10-28 08:53:16,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1279438719] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 08:53:16,699 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:53:16,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 93] total 156 [2021-10-28 08:53:16,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703887313] [2021-10-28 08:53:16,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 156 states [2021-10-28 08:53:16,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:53:16,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2021-10-28 08:53:16,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=23605, Unknown=0, NotChecked=0, Total=24180 [2021-10-28 08:53:16,702 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand has 156 states, 155 states have (on average 1.2258064516129032) internal successors, (190), 96 states have internal predecessors, (190), 32 states have call successors, (32), 1 states have call predecessors, (32), 60 states have return successors, (60), 60 states have call predecessors, (60), 32 states have call successors, (60) [2021-10-28 08:53:31,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:53:31,052 INFO L93 Difference]: Finished difference Result 112 states and 114 transitions. [2021-10-28 08:53:31,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-10-28 08:53:31,053 INFO L78 Accepts]: Start accepts. Automaton has has 156 states, 155 states have (on average 1.2258064516129032) internal successors, (190), 96 states have internal predecessors, (190), 32 states have call successors, (32), 1 states have call predecessors, (32), 60 states have return successors, (60), 60 states have call predecessors, (60), 32 states have call successors, (60) Word has length 185 [2021-10-28 08:53:31,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:53:31,055 INFO L225 Difference]: With dead ends: 112 [2021-10-28 08:53:31,055 INFO L226 Difference]: Without dead ends: 106 [2021-10-28 08:53:31,059 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6295 ImplicationChecksByTransitivity, 41.4s TimeCoverageRelationStatistics Valid=2834, Invalid=44908, Unknown=0, NotChecked=0, Total=47742 [2021-10-28 08:53:31,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-10-28 08:53:31,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2021-10-28 08:53:31,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 71 states have (on average 1.0140845070422535) internal successors, (72), 72 states have internal predecessors, (72), 2 states have call successors, (2), 1 states have call predecessors, (2), 32 states have return successors, (33), 32 states have call predecessors, (33), 2 states have call successors, (33) [2021-10-28 08:53:31,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2021-10-28 08:53:31,067 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 185 [2021-10-28 08:53:31,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:53:31,068 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2021-10-28 08:53:31,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 156 states, 155 states have (on average 1.2258064516129032) internal successors, (190), 96 states have internal predecessors, (190), 32 states have call successors, (32), 1 states have call predecessors, (32), 60 states have return successors, (60), 60 states have call predecessors, (60), 32 states have call successors, (60) [2021-10-28 08:53:31,069 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2021-10-28 08:53:31,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-10-28 08:53:31,071 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:53:31,071 INFO L513 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:53:31,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-28 08:53:31,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:53:31,283 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:53:31,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:53:31,284 INFO L85 PathProgramCache]: Analyzing trace with hash 422913524, now seen corresponding path program 16 times [2021-10-28 08:53:31,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:53:31,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1781404481] [2021-10-28 08:53:31,284 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 08:53:31,285 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:53:31,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:53:31,285 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:53:31,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-28 08:53:33,750 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 08:53:33,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-10-28 08:53:33,750 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 08:53:33,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 08:53:34,162 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-10-28 08:53:34,163 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-28 08:53:34,164 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 08:53:34,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-28 08:53:34,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:53:34,389 INFO L731 BasicCegarLoop]: Path program histogram: [16, 1] [2021-10-28 08:53:34,394 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 08:53:34,544 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 08:53:34 BoogieIcfgContainer [2021-10-28 08:53:34,546 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 08:53:34,556 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 08:53:34,556 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 08:53:34,557 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 08:53:34,557 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:46:09" (3/4) ... [2021-10-28 08:53:34,559 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-28 08:53:34,669 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38e31180-b01d-4455-95fd-1d99d827b827/bin/uautomizer-UnR33cPsHg/witness.graphml [2021-10-28 08:53:34,673 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 08:53:34,674 INFO L168 Benchmark]: Toolchain (without parser) took 445647.86 ms. Allocated memory was 83.9 MB in the beginning and 207.6 MB in the end (delta: 123.7 MB). Free memory was 48.6 MB in the beginning and 75.7 MB in the end (delta: -27.1 MB). Peak memory consumption was 98.1 MB. Max. memory is 16.1 GB. [2021-10-28 08:53:34,675 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 83.9 MB. Free memory was 65.0 MB in the beginning and 64.9 MB in the end (delta: 77.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 08:53:34,675 INFO L168 Benchmark]: CACSL2BoogieTranslator took 394.18 ms. Allocated memory is still 83.9 MB. Free memory was 48.5 MB in the beginning and 64.8 MB in the end (delta: -16.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 08:53:34,676 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.09 ms. Allocated memory is still 83.9 MB. Free memory was 64.8 MB in the beginning and 63.5 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 08:53:34,676 INFO L168 Benchmark]: Boogie Preprocessor took 53.24 ms. Allocated memory is still 83.9 MB. Free memory was 63.4 MB in the beginning and 62.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 08:53:34,676 INFO L168 Benchmark]: RCFGBuilder took 443.34 ms. Allocated memory is still 83.9 MB. Free memory was 62.3 MB in the beginning and 52.7 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-28 08:53:34,677 INFO L168 Benchmark]: TraceAbstraction took 444584.20 ms. Allocated memory was 83.9 MB in the beginning and 207.6 MB in the end (delta: 123.7 MB). Free memory was 52.2 MB in the beginning and 84.1 MB in the end (delta: -31.9 MB). Peak memory consumption was 120.2 MB. Max. memory is 16.1 GB. [2021-10-28 08:53:34,677 INFO L168 Benchmark]: Witness Printer took 116.93 ms. Allocated memory is still 207.6 MB. Free memory was 83.8 MB in the beginning and 75.7 MB in the end (delta: 8.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 08:53:34,679 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 83.9 MB. Free memory was 65.0 MB in the beginning and 64.9 MB in the end (delta: 77.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 394.18 ms. Allocated memory is still 83.9 MB. Free memory was 48.5 MB in the beginning and 64.8 MB in the end (delta: -16.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 42.09 ms. Allocated memory is still 83.9 MB. Free memory was 64.8 MB in the beginning and 63.5 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 53.24 ms. Allocated memory is still 83.9 MB. Free memory was 63.4 MB in the beginning and 62.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 443.34 ms. Allocated memory is still 83.9 MB. Free memory was 62.3 MB in the beginning and 52.7 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 444584.20 ms. Allocated memory was 83.9 MB in the beginning and 207.6 MB in the end (delta: 123.7 MB). Free memory was 52.2 MB in the beginning and 84.1 MB in the end (delta: -31.9 MB). Peak memory consumption was 120.2 MB. Max. memory is 16.1 GB. * Witness Printer took 116.93 ms. Allocated memory is still 207.6 MB. Free memory was 83.8 MB in the beginning and 75.7 MB in the end (delta: 8.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 36]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L27] int n = __VERIFIER_nondet_int(); [L28] COND FALSE !(n < 1) [L31] CALL, EXPR hanoi(n) VAL [\old(n)=32] [L19] COND FALSE !(n == 1) VAL [\old(n)=32, n=32] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=31] [L19] COND FALSE !(n == 1) VAL [\old(n)=31, n=31] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=30] [L19] COND FALSE !(n == 1) VAL [\old(n)=30, n=30] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=29] [L19] COND FALSE !(n == 1) VAL [\old(n)=29, n=29] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=28] [L19] COND FALSE !(n == 1) VAL [\old(n)=28, n=28] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=27] [L19] COND FALSE !(n == 1) VAL [\old(n)=27, n=27] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=26] [L19] COND FALSE !(n == 1) VAL [\old(n)=26, n=26] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=25] [L19] COND FALSE !(n == 1) VAL [\old(n)=25, n=25] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=24] [L19] COND FALSE !(n == 1) VAL [\old(n)=24, n=24] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=23] [L19] COND FALSE !(n == 1) VAL [\old(n)=23, n=23] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=22] [L19] COND FALSE !(n == 1) VAL [\old(n)=22, n=22] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=21] [L19] COND FALSE !(n == 1) VAL [\old(n)=21, n=21] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=20] [L19] COND FALSE !(n == 1) VAL [\old(n)=20, n=20] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=19] [L19] COND FALSE !(n == 1) VAL [\old(n)=19, n=19] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=18] [L19] COND FALSE !(n == 1) VAL [\old(n)=18, n=18] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=17] [L19] COND FALSE !(n == 1) VAL [\old(n)=17, n=17] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=16] [L19] COND FALSE !(n == 1) VAL [\old(n)=16, n=16] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=15] [L19] COND FALSE !(n == 1) VAL [\old(n)=15, n=15] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=14] [L19] COND FALSE !(n == 1) VAL [\old(n)=14, n=14] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=13] [L19] COND FALSE !(n == 1) VAL [\old(n)=13, n=13] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=12] [L19] COND FALSE !(n == 1) VAL [\old(n)=12, n=12] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=11] [L19] COND FALSE !(n == 1) VAL [\old(n)=11, n=11] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=10] [L19] COND FALSE !(n == 1) VAL [\old(n)=10, n=10] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=9] [L19] COND FALSE !(n == 1) VAL [\old(n)=9, n=9] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=8] [L19] COND FALSE !(n == 1) VAL [\old(n)=8, n=8] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=7] [L19] COND FALSE !(n == 1) VAL [\old(n)=7, n=7] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=6] [L19] COND FALSE !(n == 1) VAL [\old(n)=6, n=6] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=5] [L19] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=4] [L19] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=3] [L19] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=2] [L19] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=1] [L19] COND TRUE n == 1 [L20] return 1; VAL [\old(n)=1, \result=1, n=1] [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=2, hanoi(n-1)=1, n=2] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=3, hanoi(n-1)=3, n=3] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=4, hanoi(n-1)=7, n=4] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=5, hanoi(n-1)=15, n=5] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=6, hanoi(n-1)=31, n=6] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=7, hanoi(n-1)=63, n=7] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=8, hanoi(n-1)=127, n=8] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=9, hanoi(n-1)=255, n=9] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=10, hanoi(n-1)=511, n=10] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=11, hanoi(n-1)=1023, n=11] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=12, hanoi(n-1)=2047, n=12] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=13, hanoi(n-1)=4095, n=13] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=14, hanoi(n-1)=8191, n=14] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=15, hanoi(n-1)=16383, n=15] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=16, hanoi(n-1)=32767, n=16] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=17, hanoi(n-1)=65535, n=17] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=18, hanoi(n-1)=131071, n=18] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=19, hanoi(n-1)=262143, n=19] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=20, hanoi(n-1)=524287, n=20] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=21, hanoi(n-1)=1048575, n=21] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=22, hanoi(n-1)=2097151, n=22] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=23, hanoi(n-1)=4194303, n=23] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=24, hanoi(n-1)=8388607, n=24] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=25, hanoi(n-1)=16777215, n=25] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=26, hanoi(n-1)=33554431, n=26] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=27, hanoi(n-1)=67108863, n=27] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=28, hanoi(n-1)=134217727, n=28] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=29, hanoi(n-1)=268435455, n=29] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=30, hanoi(n-1)=536870911, n=30] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=31, hanoi(n-1)=1073741823, n=31] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=32, hanoi(n-1)=2147483647, n=32] [L22] return 2 * (hanoi(n-1)) + 1; [L31] RET, EXPR hanoi(n) [L31] unsigned result = hanoi(n); [L33] COND FALSE !(result+1>0 && result+1 == 1<