./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label01.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a5f90d-ec4e-45dc-aef3-b348b224ef9a/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a5f90d-ec4e-45dc-aef3-b348b224ef9a/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a5f90d-ec4e-45dc-aef3-b348b224ef9a/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a5f90d-ec4e-45dc-aef3-b348b224ef9a/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label01.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a5f90d-ec4e-45dc-aef3-b348b224ef9a/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a5f90d-ec4e-45dc-aef3-b348b224ef9a/bin/uautomizer-DrprNOufMa --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 4c1c75af712a533da82a30f57ac2b06c69482506da4a6eea9cce6cb2a2958856 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 16:56:56,792 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 16:56:56,794 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 16:56:56,825 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 16:56:56,826 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 16:56:56,827 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 16:56:56,829 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 16:56:56,831 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 16:56:56,833 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 16:56:56,835 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 16:56:56,836 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 16:56:56,837 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 16:56:56,838 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 16:56:56,839 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 16:56:56,841 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 16:56:56,842 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 16:56:56,844 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 16:56:56,845 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 16:56:56,847 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 16:56:56,849 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 16:56:56,851 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 16:56:56,853 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 16:56:56,854 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 16:56:56,855 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 16:56:56,859 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 16:56:56,859 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 16:56:56,860 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 16:56:56,861 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 16:56:56,868 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 16:56:56,869 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 16:56:56,869 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 16:56:56,870 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 16:56:56,870 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 16:56:56,871 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 16:56:56,872 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 16:56:56,872 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 16:56:56,872 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 16:56:56,873 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 16:56:56,873 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 16:56:56,873 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 16:56:56,874 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 16:56:56,875 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a5f90d-ec4e-45dc-aef3-b348b224ef9a/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 16:56:56,898 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 16:56:56,898 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 16:56:56,899 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 16:56:56,899 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 16:56:56,899 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 16:56:56,899 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 16:56:56,900 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 16:56:56,900 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 16:56:56,900 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 16:56:56,900 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 16:56:56,900 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 16:56:56,900 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 16:56:56,901 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 16:56:56,901 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 16:56:56,901 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 16:56:56,901 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 16:56:56,901 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 16:56:56,901 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 16:56:56,901 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 16:56:56,901 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 16:56:56,901 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 16:56:56,902 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 16:56:56,902 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 16:56:56,902 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 16:56:56,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 16:56:56,902 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 16:56:56,902 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 16:56:56,902 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 16:56:56,902 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 16:56:56,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 16:56:56,903 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 16:56:56,903 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 16:56:56,903 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 16:56:56,903 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 16:56:56,903 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_10a5f90d-ec4e-45dc-aef3-b348b224ef9a/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a5f90d-ec4e-45dc-aef3-b348b224ef9a/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4c1c75af712a533da82a30f57ac2b06c69482506da4a6eea9cce6cb2a2958856 [2021-12-06 16:56:57,073 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 16:56:57,087 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 16:56:57,089 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 16:56:57,090 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 16:56:57,091 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 16:56:57,091 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a5f90d-ec4e-45dc-aef3-b348b224ef9a/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label01.c [2021-12-06 16:56:57,141 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a5f90d-ec4e-45dc-aef3-b348b224ef9a/bin/uautomizer-DrprNOufMa/data/0a94e1773/fe9b7fee7faf425f924c2cac9194acdc/FLAG02d54bd9b [2021-12-06 16:56:57,789 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 16:56:57,790 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a5f90d-ec4e-45dc-aef3-b348b224ef9a/sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label01.c [2021-12-06 16:56:57,815 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a5f90d-ec4e-45dc-aef3-b348b224ef9a/bin/uautomizer-DrprNOufMa/data/0a94e1773/fe9b7fee7faf425f924c2cac9194acdc/FLAG02d54bd9b [2021-12-06 16:56:58,164 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a5f90d-ec4e-45dc-aef3-b348b224ef9a/bin/uautomizer-DrprNOufMa/data/0a94e1773/fe9b7fee7faf425f924c2cac9194acdc [2021-12-06 16:56:58,167 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 16:56:58,168 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 16:56:58,170 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 16:56:58,170 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 16:56:58,173 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 16:56:58,174 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 04:56:58" (1/1) ... [2021-12-06 16:56:58,175 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32d19ca6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:56:58, skipping insertion in model container [2021-12-06 16:56:58,175 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 04:56:58" (1/1) ... [2021-12-06 16:56:58,182 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 16:56:58,275 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 16:56:58,508 WARN L230 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_10a5f90d-ec4e-45dc-aef3-b348b224ef9a/sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label01.c[8749,8762] [2021-12-06 16:56:58,558 WARN L230 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_10a5f90d-ec4e-45dc-aef3-b348b224ef9a/sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label01.c[14304,14317] [2021-12-06 16:56:59,096 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 16:56:59,102 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 16:56:59,122 WARN L230 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_10a5f90d-ec4e-45dc-aef3-b348b224ef9a/sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label01.c[8749,8762] [2021-12-06 16:56:59,130 WARN L230 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_10a5f90d-ec4e-45dc-aef3-b348b224ef9a/sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label01.c[14304,14317] [2021-12-06 16:56:59,485 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 16:56:59,507 INFO L208 MainTranslator]: Completed translation [2021-12-06 16:56:59,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:56:59 WrapperNode [2021-12-06 16:56:59,507 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 16:56:59,508 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 16:56:59,508 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 16:56:59,508 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 16:56:59,514 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:56:59" (1/1) ... [2021-12-06 16:56:59,554 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:56:59" (1/1) ... [2021-12-06 16:56:59,760 INFO L137 Inliner]: procedures = 36, calls = 21, calls flagged for inlining = 16, calls inlined = 16, statements flattened = 5032 [2021-12-06 16:56:59,760 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 16:56:59,761 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 16:56:59,761 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 16:56:59,761 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 16:56:59,768 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:56:59" (1/1) ... [2021-12-06 16:56:59,769 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:56:59" (1/1) ... [2021-12-06 16:56:59,814 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:56:59" (1/1) ... [2021-12-06 16:56:59,814 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:56:59" (1/1) ... [2021-12-06 16:56:59,986 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:56:59" (1/1) ... [2021-12-06 16:57:00,014 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:56:59" (1/1) ... [2021-12-06 16:57:00,052 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:56:59" (1/1) ... [2021-12-06 16:57:00,169 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 16:57:00,170 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 16:57:00,170 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 16:57:00,170 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 16:57:00,171 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:56:59" (1/1) ... [2021-12-06 16:57:00,179 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 16:57:00,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a5f90d-ec4e-45dc-aef3-b348b224ef9a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 16:57:00,201 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a5f90d-ec4e-45dc-aef3-b348b224ef9a/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 16:57:00,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a5f90d-ec4e-45dc-aef3-b348b224ef9a/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 16:57:00,239 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 16:57:00,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 16:57:00,240 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 16:57:00,240 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 16:57:00,334 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 16:57:00,336 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 16:57:03,148 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 16:57:03,162 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 16:57:03,162 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-06 16:57:03,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 04:57:03 BoogieIcfgContainer [2021-12-06 16:57:03,165 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 16:57:03,166 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 16:57:03,166 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 16:57:03,169 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 16:57:03,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 04:56:58" (1/3) ... [2021-12-06 16:57:03,170 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eeba56b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 04:57:03, skipping insertion in model container [2021-12-06 16:57:03,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:56:59" (2/3) ... [2021-12-06 16:57:03,170 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eeba56b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 04:57:03, skipping insertion in model container [2021-12-06 16:57:03,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 04:57:03" (3/3) ... [2021-12-06 16:57:03,171 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label01.c [2021-12-06 16:57:03,175 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 16:57:03,175 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-06 16:57:03,216 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 16:57:03,221 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 [2021-12-06 16:57:03,221 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-06 16:57:03,248 INFO L276 IsEmpty]: Start isEmpty. Operand has 895 states, 892 states have (on average 1.9013452914798206) internal successors, (1696), 894 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:03,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 16:57:03,254 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 16:57:03,255 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 16:57:03,255 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 16:57:03,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 16:57:03,259 INFO L85 PathProgramCache]: Analyzing trace with hash 2085104645, now seen corresponding path program 1 times [2021-12-06 16:57:03,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 16:57:03,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085033252] [2021-12-06 16:57:03,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:57:03,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 16:57:03,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:57:03,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 16:57:03,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 16:57:03,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085033252] [2021-12-06 16:57:03,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085033252] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 16:57:03,398 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 16:57:03,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 16:57:03,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008302628] [2021-12-06 16:57:03,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 16:57:03,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 16:57:03,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 16:57:03,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 16:57:03,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 16:57:03,428 INFO L87 Difference]: Start difference. First operand has 895 states, 892 states have (on average 1.9013452914798206) internal successors, (1696), 894 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:03,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 16:57:03,489 INFO L93 Difference]: Finished difference Result 1759 states and 3336 transitions. [2021-12-06 16:57:03,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 16:57:03,491 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-06 16:57:03,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 16:57:03,506 INFO L225 Difference]: With dead ends: 1759 [2021-12-06 16:57:03,507 INFO L226 Difference]: Without dead ends: 829 [2021-12-06 16:57:03,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 16:57:03,514 INFO L933 BasicCegarLoop]: 1627 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1627 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 16:57:03,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1627 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 16:57:03,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2021-12-06 16:57:03,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 829. [2021-12-06 16:57:03,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 827 states have (on average 1.8899637243047158) internal successors, (1563), 828 states have internal predecessors, (1563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:03,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 1563 transitions. [2021-12-06 16:57:03,575 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 1563 transitions. Word has length 30 [2021-12-06 16:57:03,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 16:57:03,575 INFO L470 AbstractCegarLoop]: Abstraction has 829 states and 1563 transitions. [2021-12-06 16:57:03,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:03,576 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 1563 transitions. [2021-12-06 16:57:03,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 16:57:03,577 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 16:57:03,577 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 16:57:03,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 16:57:03,577 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 16:57:03,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 16:57:03,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1951091139, now seen corresponding path program 1 times [2021-12-06 16:57:03,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 16:57:03,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503740401] [2021-12-06 16:57:03,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:57:03,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 16:57:03,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:57:03,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 16:57:03,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 16:57:03,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503740401] [2021-12-06 16:57:03,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503740401] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 16:57:03,696 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 16:57:03,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 16:57:03,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863460434] [2021-12-06 16:57:03,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 16:57:03,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 16:57:03,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 16:57:03,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 16:57:03,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 16:57:03,698 INFO L87 Difference]: Start difference. First operand 829 states and 1563 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:03,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 16:57:03,809 INFO L93 Difference]: Finished difference Result 879 states and 1639 transitions. [2021-12-06 16:57:03,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 16:57:03,809 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-06 16:57:03,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 16:57:03,814 INFO L225 Difference]: With dead ends: 879 [2021-12-06 16:57:03,814 INFO L226 Difference]: Without dead ends: 829 [2021-12-06 16:57:03,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 16:57:03,816 INFO L933 BasicCegarLoop]: 1561 mSDtfsCounter, 3 mSDsluCounter, 4657 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6218 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 16:57:03,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6218 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 16:57:03,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2021-12-06 16:57:03,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 829. [2021-12-06 16:57:03,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 827 states have (on average 1.8621523579201935) internal successors, (1540), 828 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:03,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 1540 transitions. [2021-12-06 16:57:03,837 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 1540 transitions. Word has length 30 [2021-12-06 16:57:03,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 16:57:03,838 INFO L470 AbstractCegarLoop]: Abstraction has 829 states and 1540 transitions. [2021-12-06 16:57:03,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:03,838 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 1540 transitions. [2021-12-06 16:57:03,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-06 16:57:03,839 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 16:57:03,840 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 16:57:03,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 16:57:03,840 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 16:57:03,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 16:57:03,840 INFO L85 PathProgramCache]: Analyzing trace with hash 700328821, now seen corresponding path program 1 times [2021-12-06 16:57:03,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 16:57:03,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217602368] [2021-12-06 16:57:03,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:57:03,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 16:57:03,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:57:03,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 16:57:03,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 16:57:03,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217602368] [2021-12-06 16:57:03,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217602368] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 16:57:03,921 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 16:57:03,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 16:57:03,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430215819] [2021-12-06 16:57:03,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 16:57:03,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 16:57:03,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 16:57:03,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 16:57:03,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 16:57:03,923 INFO L87 Difference]: Start difference. First operand 829 states and 1540 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:06,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 16:57:06,609 INFO L93 Difference]: Finished difference Result 2333 states and 4413 transitions. [2021-12-06 16:57:06,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 16:57:06,609 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-12-06 16:57:06,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 16:57:06,617 INFO L225 Difference]: With dead ends: 2333 [2021-12-06 16:57:06,617 INFO L226 Difference]: Without dead ends: 1580 [2021-12-06 16:57:06,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 16:57:06,619 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 868 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2277 mSolverCounterSat, 998 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 868 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 3275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 998 IncrementalHoareTripleChecker+Valid, 2277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-06 16:57:06,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [868 Valid, 178 Invalid, 3275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [998 Valid, 2277 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-06 16:57:06,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1580 states. [2021-12-06 16:57:06,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1580 to 1580. [2021-12-06 16:57:06,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1580 states, 1578 states have (on average 1.847275031685678) internal successors, (2915), 1579 states have internal predecessors, (2915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:06,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 2915 transitions. [2021-12-06 16:57:06,654 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 2915 transitions. Word has length 48 [2021-12-06 16:57:06,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 16:57:06,654 INFO L470 AbstractCegarLoop]: Abstraction has 1580 states and 2915 transitions. [2021-12-06 16:57:06,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:06,654 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 2915 transitions. [2021-12-06 16:57:06,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-06 16:57:06,656 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 16:57:06,656 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 16:57:06,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 16:57:06,656 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 16:57:06,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 16:57:06,657 INFO L85 PathProgramCache]: Analyzing trace with hash 568524862, now seen corresponding path program 1 times [2021-12-06 16:57:06,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 16:57:06,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887939019] [2021-12-06 16:57:06,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:57:06,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 16:57:06,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:57:06,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 16:57:06,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 16:57:06,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887939019] [2021-12-06 16:57:06,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887939019] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 16:57:06,733 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 16:57:06,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 16:57:06,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677393958] [2021-12-06 16:57:06,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 16:57:06,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 16:57:06,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 16:57:06,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 16:57:06,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 16:57:06,735 INFO L87 Difference]: Start difference. First operand 1580 states and 2915 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:06,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 16:57:06,868 INFO L93 Difference]: Finished difference Result 1948 states and 3491 transitions. [2021-12-06 16:57:06,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 16:57:06,869 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-12-06 16:57:06,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 16:57:06,879 INFO L225 Difference]: With dead ends: 1948 [2021-12-06 16:57:06,880 INFO L226 Difference]: Without dead ends: 1902 [2021-12-06 16:57:06,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-06 16:57:06,882 INFO L933 BasicCegarLoop]: 1534 mSDtfsCounter, 6574 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6574 SdHoareTripleChecker+Valid, 2078 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 16:57:06,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6574 Valid, 2078 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 16:57:06,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1902 states. [2021-12-06 16:57:06,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1902 to 1624. [2021-12-06 16:57:06,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1624 states, 1622 states have (on average 1.8397040690505548) internal successors, (2984), 1623 states have internal predecessors, (2984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:06,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 2984 transitions. [2021-12-06 16:57:06,923 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 2984 transitions. Word has length 52 [2021-12-06 16:57:06,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 16:57:06,923 INFO L470 AbstractCegarLoop]: Abstraction has 1624 states and 2984 transitions. [2021-12-06 16:57:06,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:06,924 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 2984 transitions. [2021-12-06 16:57:06,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-06 16:57:06,926 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 16:57:06,926 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 16:57:06,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 16:57:06,926 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 16:57:06,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 16:57:06,927 INFO L85 PathProgramCache]: Analyzing trace with hash -524152242, now seen corresponding path program 1 times [2021-12-06 16:57:06,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 16:57:06,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524748237] [2021-12-06 16:57:06,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:57:06,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 16:57:06,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:57:06,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 16:57:06,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 16:57:06,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524748237] [2021-12-06 16:57:06,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524748237] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 16:57:06,991 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 16:57:06,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 16:57:06,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072975556] [2021-12-06 16:57:06,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 16:57:06,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 16:57:06,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 16:57:06,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 16:57:06,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 16:57:06,993 INFO L87 Difference]: Start difference. First operand 1624 states and 2984 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:07,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 16:57:07,031 INFO L93 Difference]: Finished difference Result 1793 states and 3247 transitions. [2021-12-06 16:57:07,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 16:57:07,032 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-12-06 16:57:07,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 16:57:07,040 INFO L225 Difference]: With dead ends: 1793 [2021-12-06 16:57:07,040 INFO L226 Difference]: Without dead ends: 1703 [2021-12-06 16:57:07,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 16:57:07,042 INFO L933 BasicCegarLoop]: 1536 mSDtfsCounter, 1480 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1480 SdHoareTripleChecker+Valid, 1601 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 16:57:07,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1480 Valid, 1601 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 16:57:07,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2021-12-06 16:57:07,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1699. [2021-12-06 16:57:07,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1699 states, 1697 states have (on average 1.8255745433117265) internal successors, (3098), 1698 states have internal predecessors, (3098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:07,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1699 states to 1699 states and 3098 transitions. [2021-12-06 16:57:07,083 INFO L78 Accepts]: Start accepts. Automaton has 1699 states and 3098 transitions. Word has length 54 [2021-12-06 16:57:07,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 16:57:07,083 INFO L470 AbstractCegarLoop]: Abstraction has 1699 states and 3098 transitions. [2021-12-06 16:57:07,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:07,083 INFO L276 IsEmpty]: Start isEmpty. Operand 1699 states and 3098 transitions. [2021-12-06 16:57:07,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-06 16:57:07,085 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 16:57:07,085 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 16:57:07,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 16:57:07,085 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 16:57:07,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 16:57:07,085 INFO L85 PathProgramCache]: Analyzing trace with hash -457658730, now seen corresponding path program 1 times [2021-12-06 16:57:07,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 16:57:07,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885134182] [2021-12-06 16:57:07,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:57:07,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 16:57:07,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:57:07,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 16:57:07,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 16:57:07,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885134182] [2021-12-06 16:57:07,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885134182] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 16:57:07,185 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 16:57:07,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 16:57:07,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603763032] [2021-12-06 16:57:07,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 16:57:07,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 16:57:07,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 16:57:07,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 16:57:07,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-06 16:57:07,187 INFO L87 Difference]: Start difference. First operand 1699 states and 3098 transitions. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:07,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 16:57:07,291 INFO L93 Difference]: Finished difference Result 1866 states and 3354 transitions. [2021-12-06 16:57:07,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 16:57:07,292 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-12-06 16:57:07,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 16:57:07,300 INFO L225 Difference]: With dead ends: 1866 [2021-12-06 16:57:07,300 INFO L226 Difference]: Without dead ends: 1701 [2021-12-06 16:57:07,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-06 16:57:07,302 INFO L933 BasicCegarLoop]: 1540 mSDtfsCounter, 1593 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1593 SdHoareTripleChecker+Valid, 1814 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 16:57:07,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1593 Valid, 1814 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 16:57:07,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1701 states. [2021-12-06 16:57:07,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1701 to 1699. [2021-12-06 16:57:07,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1699 states, 1697 states have (on average 1.8243959929286977) internal successors, (3096), 1698 states have internal predecessors, (3096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:07,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1699 states to 1699 states and 3096 transitions. [2021-12-06 16:57:07,339 INFO L78 Accepts]: Start accepts. Automaton has 1699 states and 3096 transitions. Word has length 54 [2021-12-06 16:57:07,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 16:57:07,340 INFO L470 AbstractCegarLoop]: Abstraction has 1699 states and 3096 transitions. [2021-12-06 16:57:07,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:07,340 INFO L276 IsEmpty]: Start isEmpty. Operand 1699 states and 3096 transitions. [2021-12-06 16:57:07,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-06 16:57:07,341 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 16:57:07,341 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 16:57:07,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 16:57:07,341 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 16:57:07,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 16:57:07,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1331255346, now seen corresponding path program 1 times [2021-12-06 16:57:07,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 16:57:07,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007125715] [2021-12-06 16:57:07,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:57:07,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 16:57:07,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:57:07,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 16:57:07,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 16:57:07,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007125715] [2021-12-06 16:57:07,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007125715] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 16:57:07,373 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 16:57:07,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 16:57:07,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551991944] [2021-12-06 16:57:07,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 16:57:07,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 16:57:07,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 16:57:07,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 16:57:07,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 16:57:07,374 INFO L87 Difference]: Start difference. First operand 1699 states and 3096 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:07,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 16:57:07,405 INFO L93 Difference]: Finished difference Result 2005 states and 3562 transitions. [2021-12-06 16:57:07,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 16:57:07,405 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-12-06 16:57:07,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 16:57:07,414 INFO L225 Difference]: With dead ends: 2005 [2021-12-06 16:57:07,414 INFO L226 Difference]: Without dead ends: 1840 [2021-12-06 16:57:07,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 16:57:07,416 INFO L933 BasicCegarLoop]: 1557 mSDtfsCounter, 1489 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1489 SdHoareTripleChecker+Valid, 1639 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 16:57:07,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1489 Valid, 1639 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 16:57:07,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1840 states. [2021-12-06 16:57:07,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1840 to 1838. [2021-12-06 16:57:07,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1838 states, 1836 states have (on average 1.7995642701525054) internal successors, (3304), 1837 states have internal predecessors, (3304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:07,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1838 states to 1838 states and 3304 transitions. [2021-12-06 16:57:07,474 INFO L78 Accepts]: Start accepts. Automaton has 1838 states and 3304 transitions. Word has length 54 [2021-12-06 16:57:07,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 16:57:07,474 INFO L470 AbstractCegarLoop]: Abstraction has 1838 states and 3304 transitions. [2021-12-06 16:57:07,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:07,474 INFO L276 IsEmpty]: Start isEmpty. Operand 1838 states and 3304 transitions. [2021-12-06 16:57:07,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-06 16:57:07,475 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 16:57:07,475 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 16:57:07,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 16:57:07,475 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 16:57:07,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 16:57:07,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1716204334, now seen corresponding path program 1 times [2021-12-06 16:57:07,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 16:57:07,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263329771] [2021-12-06 16:57:07,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:57:07,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 16:57:07,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:57:07,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 16:57:07,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 16:57:07,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263329771] [2021-12-06 16:57:07,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263329771] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 16:57:07,510 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 16:57:07,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 16:57:07,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517518778] [2021-12-06 16:57:07,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 16:57:07,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 16:57:07,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 16:57:07,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 16:57:07,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 16:57:07,511 INFO L87 Difference]: Start difference. First operand 1838 states and 3304 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:07,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 16:57:07,551 INFO L93 Difference]: Finished difference Result 2398 states and 4146 transitions. [2021-12-06 16:57:07,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 16:57:07,552 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-12-06 16:57:07,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 16:57:07,561 INFO L225 Difference]: With dead ends: 2398 [2021-12-06 16:57:07,561 INFO L226 Difference]: Without dead ends: 2094 [2021-12-06 16:57:07,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 16:57:07,562 INFO L933 BasicCegarLoop]: 1570 mSDtfsCounter, 1493 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1493 SdHoareTripleChecker+Valid, 1648 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 16:57:07,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1493 Valid, 1648 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 16:57:07,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2094 states. [2021-12-06 16:57:07,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2094 to 2092. [2021-12-06 16:57:07,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2092 states, 2090 states have (on average 1.7588516746411482) internal successors, (3676), 2091 states have internal predecessors, (3676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:07,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2092 states to 2092 states and 3676 transitions. [2021-12-06 16:57:07,611 INFO L78 Accepts]: Start accepts. Automaton has 2092 states and 3676 transitions. Word has length 54 [2021-12-06 16:57:07,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 16:57:07,611 INFO L470 AbstractCegarLoop]: Abstraction has 2092 states and 3676 transitions. [2021-12-06 16:57:07,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:07,612 INFO L276 IsEmpty]: Start isEmpty. Operand 2092 states and 3676 transitions. [2021-12-06 16:57:07,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-06 16:57:07,612 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 16:57:07,612 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 16:57:07,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 16:57:07,612 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 16:57:07,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 16:57:07,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1442516622, now seen corresponding path program 1 times [2021-12-06 16:57:07,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 16:57:07,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718540247] [2021-12-06 16:57:07,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:57:07,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 16:57:07,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:57:07,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 16:57:07,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 16:57:07,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718540247] [2021-12-06 16:57:07,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718540247] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 16:57:07,638 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 16:57:07,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 16:57:07,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034289426] [2021-12-06 16:57:07,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 16:57:07,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 16:57:07,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 16:57:07,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 16:57:07,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 16:57:07,639 INFO L87 Difference]: Start difference. First operand 2092 states and 3676 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:07,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 16:57:07,692 INFO L93 Difference]: Finished difference Result 3112 states and 5182 transitions. [2021-12-06 16:57:07,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 16:57:07,693 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-12-06 16:57:07,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 16:57:07,704 INFO L225 Difference]: With dead ends: 3112 [2021-12-06 16:57:07,704 INFO L226 Difference]: Without dead ends: 2554 [2021-12-06 16:57:07,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 16:57:07,706 INFO L933 BasicCegarLoop]: 1583 mSDtfsCounter, 1497 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1497 SdHoareTripleChecker+Valid, 1657 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 16:57:07,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1497 Valid, 1657 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 16:57:07,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2554 states. [2021-12-06 16:57:07,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2554 to 2552. [2021-12-06 16:57:07,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2552 states, 2550 states have (on average 1.6988235294117646) internal successors, (4332), 2551 states have internal predecessors, (4332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:07,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2552 states to 2552 states and 4332 transitions. [2021-12-06 16:57:07,774 INFO L78 Accepts]: Start accepts. Automaton has 2552 states and 4332 transitions. Word has length 54 [2021-12-06 16:57:07,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 16:57:07,774 INFO L470 AbstractCegarLoop]: Abstraction has 2552 states and 4332 transitions. [2021-12-06 16:57:07,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:07,774 INFO L276 IsEmpty]: Start isEmpty. Operand 2552 states and 4332 transitions. [2021-12-06 16:57:07,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-06 16:57:07,775 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 16:57:07,775 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 16:57:07,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 16:57:07,775 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 16:57:07,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 16:57:07,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1717241860, now seen corresponding path program 1 times [2021-12-06 16:57:07,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 16:57:07,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973281452] [2021-12-06 16:57:07,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:57:07,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 16:57:07,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:57:07,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 16:57:07,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 16:57:07,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973281452] [2021-12-06 16:57:07,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973281452] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 16:57:07,819 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 16:57:07,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 16:57:07,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976862520] [2021-12-06 16:57:07,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 16:57:07,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 16:57:07,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 16:57:07,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 16:57:07,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 16:57:07,820 INFO L87 Difference]: Start difference. First operand 2552 states and 4332 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:07,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 16:57:07,948 INFO L93 Difference]: Finished difference Result 3322 states and 5433 transitions. [2021-12-06 16:57:07,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 16:57:07,949 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-12-06 16:57:07,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 16:57:07,967 INFO L225 Difference]: With dead ends: 3322 [2021-12-06 16:57:07,968 INFO L226 Difference]: Without dead ends: 3320 [2021-12-06 16:57:07,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-06 16:57:07,970 INFO L933 BasicCegarLoop]: 1580 mSDtfsCounter, 186 mSDsluCounter, 4622 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 6202 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 16:57:07,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 6202 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 16:57:07,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3320 states. [2021-12-06 16:57:08,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3320 to 2600. [2021-12-06 16:57:08,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2600 states, 2598 states have (on average 1.682832948421863) internal successors, (4372), 2599 states have internal predecessors, (4372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:08,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2600 states to 2600 states and 4372 transitions. [2021-12-06 16:57:08,079 INFO L78 Accepts]: Start accepts. Automaton has 2600 states and 4372 transitions. Word has length 55 [2021-12-06 16:57:08,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 16:57:08,079 INFO L470 AbstractCegarLoop]: Abstraction has 2600 states and 4372 transitions. [2021-12-06 16:57:08,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:08,080 INFO L276 IsEmpty]: Start isEmpty. Operand 2600 states and 4372 transitions. [2021-12-06 16:57:08,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-06 16:57:08,080 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 16:57:08,080 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 16:57:08,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 16:57:08,081 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 16:57:08,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 16:57:08,081 INFO L85 PathProgramCache]: Analyzing trace with hash -754642547, now seen corresponding path program 1 times [2021-12-06 16:57:08,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 16:57:08,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374959003] [2021-12-06 16:57:08,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:57:08,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 16:57:08,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:57:08,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 16:57:08,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 16:57:08,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374959003] [2021-12-06 16:57:08,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374959003] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 16:57:08,115 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 16:57:08,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 16:57:08,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977445187] [2021-12-06 16:57:08,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 16:57:08,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 16:57:08,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 16:57:08,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 16:57:08,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 16:57:08,116 INFO L87 Difference]: Start difference. First operand 2600 states and 4372 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:08,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 16:57:08,223 INFO L93 Difference]: Finished difference Result 3695 states and 5962 transitions. [2021-12-06 16:57:08,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 16:57:08,224 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-12-06 16:57:08,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 16:57:08,237 INFO L225 Difference]: With dead ends: 3695 [2021-12-06 16:57:08,237 INFO L226 Difference]: Without dead ends: 3084 [2021-12-06 16:57:08,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 16:57:08,239 INFO L933 BasicCegarLoop]: 1591 mSDtfsCounter, 1498 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1498 SdHoareTripleChecker+Valid, 1661 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 16:57:08,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1498 Valid, 1661 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 16:57:08,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3084 states. [2021-12-06 16:57:08,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3084 to 3082. [2021-12-06 16:57:08,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3082 states, 3080 states have (on average 1.6383116883116884) internal successors, (5046), 3081 states have internal predecessors, (5046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:08,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3082 states to 3082 states and 5046 transitions. [2021-12-06 16:57:08,348 INFO L78 Accepts]: Start accepts. Automaton has 3082 states and 5046 transitions. Word has length 56 [2021-12-06 16:57:08,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 16:57:08,348 INFO L470 AbstractCegarLoop]: Abstraction has 3082 states and 5046 transitions. [2021-12-06 16:57:08,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:08,349 INFO L276 IsEmpty]: Start isEmpty. Operand 3082 states and 5046 transitions. [2021-12-06 16:57:08,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-06 16:57:08,350 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 16:57:08,350 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 16:57:08,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 16:57:08,351 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 16:57:08,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 16:57:08,351 INFO L85 PathProgramCache]: Analyzing trace with hash 457839235, now seen corresponding path program 1 times [2021-12-06 16:57:08,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 16:57:08,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893547240] [2021-12-06 16:57:08,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:57:08,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 16:57:08,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:57:08,407 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-06 16:57:08,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 16:57:08,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893547240] [2021-12-06 16:57:08,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893547240] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 16:57:08,407 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 16:57:08,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 16:57:08,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016530731] [2021-12-06 16:57:08,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 16:57:08,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 16:57:08,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 16:57:08,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 16:57:08,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 16:57:08,409 INFO L87 Difference]: Start difference. First operand 3082 states and 5046 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:08,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 16:57:08,739 INFO L93 Difference]: Finished difference Result 9588 states and 14287 transitions. [2021-12-06 16:57:08,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 16:57:08,740 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-12-06 16:57:08,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 16:57:08,769 INFO L225 Difference]: With dead ends: 9588 [2021-12-06 16:57:08,770 INFO L226 Difference]: Without dead ends: 8042 [2021-12-06 16:57:08,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-06 16:57:08,775 INFO L933 BasicCegarLoop]: 1601 mSDtfsCounter, 4794 mSDsluCounter, 1759 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4794 SdHoareTripleChecker+Valid, 3360 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 16:57:08,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4794 Valid, 3360 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 16:57:08,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8042 states. [2021-12-06 16:57:08,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8042 to 4626. [2021-12-06 16:57:08,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4626 states, 4624 states have (on average 1.5618512110726643) internal successors, (7222), 4625 states have internal predecessors, (7222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:08,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4626 states to 4626 states and 7222 transitions. [2021-12-06 16:57:08,967 INFO L78 Accepts]: Start accepts. Automaton has 4626 states and 7222 transitions. Word has length 79 [2021-12-06 16:57:08,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 16:57:08,967 INFO L470 AbstractCegarLoop]: Abstraction has 4626 states and 7222 transitions. [2021-12-06 16:57:08,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:08,968 INFO L276 IsEmpty]: Start isEmpty. Operand 4626 states and 7222 transitions. [2021-12-06 16:57:08,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-06 16:57:08,969 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 16:57:08,969 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 16:57:08,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-06 16:57:08,969 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 16:57:08,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 16:57:08,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1705346851, now seen corresponding path program 1 times [2021-12-06 16:57:08,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 16:57:08,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819369545] [2021-12-06 16:57:08,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:57:08,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 16:57:08,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:57:09,029 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 16:57:09,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 16:57:09,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819369545] [2021-12-06 16:57:09,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819369545] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 16:57:09,029 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 16:57:09,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 16:57:09,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606393899] [2021-12-06 16:57:09,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 16:57:09,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 16:57:09,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 16:57:09,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 16:57:09,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 16:57:09,031 INFO L87 Difference]: Start difference. First operand 4626 states and 7222 transitions. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:09,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 16:57:09,323 INFO L93 Difference]: Finished difference Result 11132 states and 16463 transitions. [2021-12-06 16:57:09,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 16:57:09,323 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-12-06 16:57:09,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 16:57:09,337 INFO L225 Difference]: With dead ends: 11132 [2021-12-06 16:57:09,338 INFO L226 Difference]: Without dead ends: 9586 [2021-12-06 16:57:09,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-06 16:57:09,342 INFO L933 BasicCegarLoop]: 1603 mSDtfsCounter, 4743 mSDsluCounter, 1799 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4743 SdHoareTripleChecker+Valid, 3402 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 16:57:09,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4743 Valid, 3402 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 16:57:09,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9586 states. [2021-12-06 16:57:09,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9586 to 6946. [2021-12-06 16:57:09,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6946 states, 6944 states have (on average 1.507200460829493) internal successors, (10466), 6945 states have internal predecessors, (10466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:09,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6946 states to 6946 states and 10466 transitions. [2021-12-06 16:57:09,569 INFO L78 Accepts]: Start accepts. Automaton has 6946 states and 10466 transitions. Word has length 79 [2021-12-06 16:57:09,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 16:57:09,569 INFO L470 AbstractCegarLoop]: Abstraction has 6946 states and 10466 transitions. [2021-12-06 16:57:09,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:09,570 INFO L276 IsEmpty]: Start isEmpty. Operand 6946 states and 10466 transitions. [2021-12-06 16:57:09,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-06 16:57:09,571 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 16:57:09,571 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 16:57:09,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 16:57:09,572 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 16:57:09,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 16:57:09,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1979034563, now seen corresponding path program 1 times [2021-12-06 16:57:09,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 16:57:09,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737827774] [2021-12-06 16:57:09,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:57:09,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 16:57:09,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:57:09,617 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 16:57:09,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 16:57:09,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737827774] [2021-12-06 16:57:09,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737827774] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 16:57:09,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 16:57:09,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 16:57:09,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964005997] [2021-12-06 16:57:09,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 16:57:09,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 16:57:09,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 16:57:09,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 16:57:09,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 16:57:09,619 INFO L87 Difference]: Start difference. First operand 6946 states and 10466 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:09,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 16:57:09,930 INFO L93 Difference]: Finished difference Result 12676 states and 18639 transitions. [2021-12-06 16:57:09,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 16:57:09,931 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-12-06 16:57:09,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 16:57:09,947 INFO L225 Difference]: With dead ends: 12676 [2021-12-06 16:57:09,947 INFO L226 Difference]: Without dead ends: 11130 [2021-12-06 16:57:09,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-06 16:57:09,954 INFO L933 BasicCegarLoop]: 1601 mSDtfsCounter, 4770 mSDsluCounter, 1807 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4770 SdHoareTripleChecker+Valid, 3408 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 16:57:09,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4770 Valid, 3408 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 16:57:09,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11130 states. [2021-12-06 16:57:10,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11130 to 8490. [2021-12-06 16:57:10,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8490 states, 8488 states have (on average 1.4893967954759662) internal successors, (12642), 8489 states have internal predecessors, (12642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:10,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8490 states to 8490 states and 12642 transitions. [2021-12-06 16:57:10,270 INFO L78 Accepts]: Start accepts. Automaton has 8490 states and 12642 transitions. Word has length 79 [2021-12-06 16:57:10,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 16:57:10,270 INFO L470 AbstractCegarLoop]: Abstraction has 8490 states and 12642 transitions. [2021-12-06 16:57:10,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:10,270 INFO L276 IsEmpty]: Start isEmpty. Operand 8490 states and 12642 transitions. [2021-12-06 16:57:10,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-06 16:57:10,272 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 16:57:10,272 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 16:57:10,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-06 16:57:10,272 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 16:57:10,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 16:57:10,272 INFO L85 PathProgramCache]: Analyzing trace with hash 547636123, now seen corresponding path program 1 times [2021-12-06 16:57:10,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 16:57:10,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821726875] [2021-12-06 16:57:10,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:57:10,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 16:57:10,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:57:10,305 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 16:57:10,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 16:57:10,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821726875] [2021-12-06 16:57:10,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821726875] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 16:57:10,306 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 16:57:10,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 16:57:10,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956722035] [2021-12-06 16:57:10,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 16:57:10,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 16:57:10,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 16:57:10,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 16:57:10,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 16:57:10,307 INFO L87 Difference]: Start difference. First operand 8490 states and 12642 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:10,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 16:57:10,472 INFO L93 Difference]: Finished difference Result 13416 states and 19659 transitions. [2021-12-06 16:57:10,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 16:57:10,472 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-12-06 16:57:10,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 16:57:10,480 INFO L225 Difference]: With dead ends: 13416 [2021-12-06 16:57:10,480 INFO L226 Difference]: Without dead ends: 6462 [2021-12-06 16:57:10,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 16:57:10,487 INFO L933 BasicCegarLoop]: 1572 mSDtfsCounter, 45 mSDsluCounter, 1524 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 3096 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 16:57:10,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 3096 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 16:57:10,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6462 states. [2021-12-06 16:57:10,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6462 to 6460. [2021-12-06 16:57:10,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6460 states, 6458 states have (on average 1.5156395168782906) internal successors, (9788), 6459 states have internal predecessors, (9788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:10,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6460 states to 6460 states and 9788 transitions. [2021-12-06 16:57:10,742 INFO L78 Accepts]: Start accepts. Automaton has 6460 states and 9788 transitions. Word has length 81 [2021-12-06 16:57:10,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 16:57:10,743 INFO L470 AbstractCegarLoop]: Abstraction has 6460 states and 9788 transitions. [2021-12-06 16:57:10,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:10,743 INFO L276 IsEmpty]: Start isEmpty. Operand 6460 states and 9788 transitions. [2021-12-06 16:57:10,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-06 16:57:10,745 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 16:57:10,745 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 16:57:10,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-06 16:57:10,745 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 16:57:10,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 16:57:10,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1706064798, now seen corresponding path program 1 times [2021-12-06 16:57:10,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 16:57:10,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732184092] [2021-12-06 16:57:10,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:57:10,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 16:57:10,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:57:10,790 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 16:57:10,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 16:57:10,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732184092] [2021-12-06 16:57:10,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732184092] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 16:57:10,790 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 16:57:10,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 16:57:10,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976219107] [2021-12-06 16:57:10,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 16:57:10,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 16:57:10,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 16:57:10,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 16:57:10,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 16:57:10,791 INFO L87 Difference]: Start difference. First operand 6460 states and 9788 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:11,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 16:57:11,085 INFO L93 Difference]: Finished difference Result 10822 states and 16001 transitions. [2021-12-06 16:57:11,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 16:57:11,086 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-12-06 16:57:11,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 16:57:11,094 INFO L225 Difference]: With dead ends: 10822 [2021-12-06 16:57:11,094 INFO L226 Difference]: Without dead ends: 9732 [2021-12-06 16:57:11,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-06 16:57:11,098 INFO L933 BasicCegarLoop]: 1600 mSDtfsCounter, 4760 mSDsluCounter, 1779 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4760 SdHoareTripleChecker+Valid, 3379 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 16:57:11,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4760 Valid, 3379 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 16:57:11,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9732 states. [2021-12-06 16:57:11,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9732 to 7548. [2021-12-06 16:57:11,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7548 states, 7546 states have (on average 1.5006626027034191) internal successors, (11324), 7547 states have internal predecessors, (11324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:11,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7548 states to 7548 states and 11324 transitions. [2021-12-06 16:57:11,351 INFO L78 Accepts]: Start accepts. Automaton has 7548 states and 11324 transitions. Word has length 81 [2021-12-06 16:57:11,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 16:57:11,352 INFO L470 AbstractCegarLoop]: Abstraction has 7548 states and 11324 transitions. [2021-12-06 16:57:11,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:11,352 INFO L276 IsEmpty]: Start isEmpty. Operand 7548 states and 11324 transitions. [2021-12-06 16:57:11,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-06 16:57:11,353 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 16:57:11,354 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 16:57:11,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-06 16:57:11,354 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 16:57:11,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 16:57:11,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1625443301, now seen corresponding path program 1 times [2021-12-06 16:57:11,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 16:57:11,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282144235] [2021-12-06 16:57:11,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:57:11,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 16:57:11,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:57:11,383 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 16:57:11,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 16:57:11,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282144235] [2021-12-06 16:57:11,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282144235] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 16:57:11,384 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 16:57:11,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 16:57:11,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708079159] [2021-12-06 16:57:11,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 16:57:11,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 16:57:11,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 16:57:11,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 16:57:11,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 16:57:11,385 INFO L87 Difference]: Start difference. First operand 7548 states and 11324 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:11,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 16:57:11,504 INFO L93 Difference]: Finished difference Result 10544 states and 15550 transitions. [2021-12-06 16:57:11,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 16:57:11,505 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-12-06 16:57:11,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 16:57:11,509 INFO L225 Difference]: With dead ends: 10544 [2021-12-06 16:57:11,509 INFO L226 Difference]: Without dead ends: 4558 [2021-12-06 16:57:11,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 16:57:11,514 INFO L933 BasicCegarLoop]: 1565 mSDtfsCounter, 39 mSDsluCounter, 1516 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 3081 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 16:57:11,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 3081 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 16:57:11,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4558 states. [2021-12-06 16:57:11,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4558 to 4556. [2021-12-06 16:57:11,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4556 states, 4554 states have (on average 1.5494071146245059) internal successors, (7056), 4555 states have internal predecessors, (7056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:11,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4556 states to 4556 states and 7056 transitions. [2021-12-06 16:57:11,645 INFO L78 Accepts]: Start accepts. Automaton has 4556 states and 7056 transitions. Word has length 82 [2021-12-06 16:57:11,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 16:57:11,646 INFO L470 AbstractCegarLoop]: Abstraction has 4556 states and 7056 transitions. [2021-12-06 16:57:11,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:11,646 INFO L276 IsEmpty]: Start isEmpty. Operand 4556 states and 7056 transitions. [2021-12-06 16:57:11,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-06 16:57:11,647 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 16:57:11,647 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 16:57:11,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-06 16:57:11,647 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 16:57:11,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 16:57:11,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1082921701, now seen corresponding path program 1 times [2021-12-06 16:57:11,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 16:57:11,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503505443] [2021-12-06 16:57:11,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:57:11,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 16:57:11,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:57:11,678 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 16:57:11,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 16:57:11,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503505443] [2021-12-06 16:57:11,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503505443] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 16:57:11,678 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 16:57:11,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 16:57:11,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802022149] [2021-12-06 16:57:11,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 16:57:11,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 16:57:11,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 16:57:11,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 16:57:11,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 16:57:11,679 INFO L87 Difference]: Start difference. First operand 4556 states and 7056 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:11,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 16:57:11,760 INFO L93 Difference]: Finished difference Result 6056 states and 9148 transitions. [2021-12-06 16:57:11,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 16:57:11,761 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-12-06 16:57:11,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 16:57:11,764 INFO L225 Difference]: With dead ends: 6056 [2021-12-06 16:57:11,764 INFO L226 Difference]: Without dead ends: 3062 [2021-12-06 16:57:11,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 16:57:11,767 INFO L933 BasicCegarLoop]: 1558 mSDtfsCounter, 35 mSDsluCounter, 1508 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 3066 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 16:57:11,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 3066 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 16:57:11,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3062 states. [2021-12-06 16:57:11,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3062 to 3060. [2021-12-06 16:57:11,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3060 states, 3058 states have (on average 1.616742969260955) internal successors, (4944), 3059 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:11,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3060 states to 3060 states and 4944 transitions. [2021-12-06 16:57:11,840 INFO L78 Accepts]: Start accepts. Automaton has 3060 states and 4944 transitions. Word has length 82 [2021-12-06 16:57:11,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 16:57:11,840 INFO L470 AbstractCegarLoop]: Abstraction has 3060 states and 4944 transitions. [2021-12-06 16:57:11,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:11,840 INFO L276 IsEmpty]: Start isEmpty. Operand 3060 states and 4944 transitions. [2021-12-06 16:57:11,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-06 16:57:11,841 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 16:57:11,841 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 16:57:11,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-06 16:57:11,842 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 16:57:11,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 16:57:11,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1170040495, now seen corresponding path program 1 times [2021-12-06 16:57:11,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 16:57:11,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144650366] [2021-12-06 16:57:11,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:57:11,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 16:57:11,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:57:11,870 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 16:57:11,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 16:57:11,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144650366] [2021-12-06 16:57:11,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144650366] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 16:57:11,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 16:57:11,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 16:57:11,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985902222] [2021-12-06 16:57:11,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 16:57:11,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 16:57:11,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 16:57:11,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 16:57:11,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 16:57:11,872 INFO L87 Difference]: Start difference. First operand 3060 states and 4944 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:11,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 16:57:11,914 INFO L93 Difference]: Finished difference Result 3812 states and 5980 transitions. [2021-12-06 16:57:11,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 16:57:11,914 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-12-06 16:57:11,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 16:57:11,916 INFO L225 Difference]: With dead ends: 3812 [2021-12-06 16:57:11,917 INFO L226 Difference]: Without dead ends: 2314 [2021-12-06 16:57:11,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 16:57:11,919 INFO L933 BasicCegarLoop]: 1551 mSDtfsCounter, 31 mSDsluCounter, 1500 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 3051 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 16:57:11,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 3051 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 16:57:11,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2021-12-06 16:57:11,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 2312. [2021-12-06 16:57:11,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2312 states, 2310 states have (on average 1.687878787878788) internal successors, (3899), 2311 states have internal predecessors, (3899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:11,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2312 states to 2312 states and 3899 transitions. [2021-12-06 16:57:11,968 INFO L78 Accepts]: Start accepts. Automaton has 2312 states and 3899 transitions. Word has length 82 [2021-12-06 16:57:11,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 16:57:11,968 INFO L470 AbstractCegarLoop]: Abstraction has 2312 states and 3899 transitions. [2021-12-06 16:57:11,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:11,968 INFO L276 IsEmpty]: Start isEmpty. Operand 2312 states and 3899 transitions. [2021-12-06 16:57:11,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-06 16:57:11,969 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 16:57:11,969 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 16:57:11,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-06 16:57:11,969 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 16:57:11,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 16:57:11,969 INFO L85 PathProgramCache]: Analyzing trace with hash 2005651591, now seen corresponding path program 1 times [2021-12-06 16:57:11,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 16:57:11,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203442921] [2021-12-06 16:57:11,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:57:11,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 16:57:11,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:57:12,139 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 16:57:12,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 16:57:12,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203442921] [2021-12-06 16:57:12,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203442921] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 16:57:12,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566077817] [2021-12-06 16:57:12,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:57:12,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 16:57:12,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a5f90d-ec4e-45dc-aef3-b348b224ef9a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 16:57:12,141 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a5f90d-ec4e-45dc-aef3-b348b224ef9a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 16:57:12,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a5f90d-ec4e-45dc-aef3-b348b224ef9a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 16:57:12,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:57:12,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 16:57:12,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 16:57:12,518 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 16:57:12,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 16:57:12,669 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 16:57:12,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566077817] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 16:57:12,669 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 16:57:12,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4, 4] total 18 [2021-12-06 16:57:12,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098269578] [2021-12-06 16:57:12,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 16:57:12,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 16:57:12,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 16:57:12,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 16:57:12,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-12-06 16:57:12,671 INFO L87 Difference]: Start difference. First operand 2312 states and 3899 transitions. Second operand has 18 states, 18 states have (on average 12.722222222222221) internal successors, (229), 18 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:14,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 16:57:14,863 INFO L93 Difference]: Finished difference Result 11471 states and 16110 transitions. [2021-12-06 16:57:14,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-12-06 16:57:14,864 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 12.722222222222221) internal successors, (229), 18 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-12-06 16:57:14,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 16:57:14,872 INFO L225 Difference]: With dead ends: 11471 [2021-12-06 16:57:14,872 INFO L226 Difference]: Without dead ends: 10721 [2021-12-06 16:57:14,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2225 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1175, Invalid=5467, Unknown=0, NotChecked=0, Total=6642 [2021-12-06 16:57:14,877 INFO L933 BasicCegarLoop]: 1547 mSDtfsCounter, 12857 mSDsluCounter, 5216 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12857 SdHoareTripleChecker+Valid, 6763 SdHoareTripleChecker+Invalid, 1120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 16:57:14,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12857 Valid, 6763 Invalid, 1120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 942 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 16:57:14,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10721 states. [2021-12-06 16:57:15,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10721 to 7981. [2021-12-06 16:57:15,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7981 states, 7979 states have (on average 1.398295525755107) internal successors, (11157), 7980 states have internal predecessors, (11157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:15,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7981 states to 7981 states and 11157 transitions. [2021-12-06 16:57:15,198 INFO L78 Accepts]: Start accepts. Automaton has 7981 states and 11157 transitions. Word has length 82 [2021-12-06 16:57:15,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 16:57:15,198 INFO L470 AbstractCegarLoop]: Abstraction has 7981 states and 11157 transitions. [2021-12-06 16:57:15,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 12.722222222222221) internal successors, (229), 18 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:15,198 INFO L276 IsEmpty]: Start isEmpty. Operand 7981 states and 11157 transitions. [2021-12-06 16:57:15,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-06 16:57:15,199 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 16:57:15,199 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 16:57:15,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a5f90d-ec4e-45dc-aef3-b348b224ef9a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 16:57:15,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a5f90d-ec4e-45dc-aef3-b348b224ef9a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 16:57:15,401 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 16:57:15,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 16:57:15,403 INFO L85 PathProgramCache]: Analyzing trace with hash -10585946, now seen corresponding path program 1 times [2021-12-06 16:57:15,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 16:57:15,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557850161] [2021-12-06 16:57:15,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:57:15,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 16:57:15,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:57:15,516 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 16:57:15,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 16:57:15,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557850161] [2021-12-06 16:57:15,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557850161] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 16:57:15,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63766244] [2021-12-06 16:57:15,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:57:15,517 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 16:57:15,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a5f90d-ec4e-45dc-aef3-b348b224ef9a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 16:57:15,518 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a5f90d-ec4e-45dc-aef3-b348b224ef9a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 16:57:15,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a5f90d-ec4e-45dc-aef3-b348b224ef9a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 16:57:15,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:57:15,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 16:57:15,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 16:57:16,014 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 16:57:16,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 16:57:16,485 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 16:57:16,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63766244] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 16:57:16,485 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 16:57:16,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2021-12-06 16:57:16,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343153137] [2021-12-06 16:57:16,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 16:57:16,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 16:57:16,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 16:57:16,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 16:57:16,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-12-06 16:57:16,487 INFO L87 Difference]: Start difference. First operand 7981 states and 11157 transitions. Second operand has 26 states, 26 states have (on average 9.038461538461538) internal successors, (235), 25 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:22,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 16:57:22,849 INFO L93 Difference]: Finished difference Result 82952 states and 106051 transitions. [2021-12-06 16:57:22,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-12-06 16:57:22,849 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 9.038461538461538) internal successors, (235), 25 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-12-06 16:57:22,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 16:57:22,932 INFO L225 Difference]: With dead ends: 82952 [2021-12-06 16:57:22,932 INFO L226 Difference]: Without dead ends: 76622 [2021-12-06 16:57:22,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2170 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1490, Invalid=6520, Unknown=0, NotChecked=0, Total=8010 [2021-12-06 16:57:22,952 INFO L933 BasicCegarLoop]: 1562 mSDtfsCounter, 15431 mSDsluCounter, 8650 mSDsCounter, 0 mSdLazyCounter, 1140 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15431 SdHoareTripleChecker+Valid, 10212 SdHoareTripleChecker+Invalid, 1297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 16:57:22,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15431 Valid, 10212 Invalid, 1297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1140 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 16:57:23,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76622 states. [2021-12-06 16:57:25,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76622 to 40331. [2021-12-06 16:57:25,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40331 states, 40329 states have (on average 1.2858736889087257) internal successors, (51858), 40330 states have internal predecessors, (51858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:25,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40331 states to 40331 states and 51858 transitions. [2021-12-06 16:57:25,510 INFO L78 Accepts]: Start accepts. Automaton has 40331 states and 51858 transitions. Word has length 83 [2021-12-06 16:57:25,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 16:57:25,511 INFO L470 AbstractCegarLoop]: Abstraction has 40331 states and 51858 transitions. [2021-12-06 16:57:25,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 9.038461538461538) internal successors, (235), 25 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:25,511 INFO L276 IsEmpty]: Start isEmpty. Operand 40331 states and 51858 transitions. [2021-12-06 16:57:25,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-06 16:57:25,513 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 16:57:25,513 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 16:57:25,533 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a5f90d-ec4e-45dc-aef3-b348b224ef9a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 16:57:25,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a5f90d-ec4e-45dc-aef3-b348b224ef9a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-06 16:57:25,715 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 16:57:25,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 16:57:25,716 INFO L85 PathProgramCache]: Analyzing trace with hash -966330648, now seen corresponding path program 1 times [2021-12-06 16:57:25,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 16:57:25,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965685110] [2021-12-06 16:57:25,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:57:25,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 16:57:25,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:57:25,785 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 16:57:25,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 16:57:25,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965685110] [2021-12-06 16:57:25,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965685110] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 16:57:25,786 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 16:57:25,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 16:57:25,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296971978] [2021-12-06 16:57:25,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 16:57:25,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 16:57:25,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 16:57:25,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 16:57:25,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 16:57:25,787 INFO L87 Difference]: Start difference. First operand 40331 states and 51858 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:27,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 16:57:27,931 INFO L93 Difference]: Finished difference Result 73274 states and 93987 transitions. [2021-12-06 16:57:27,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 16:57:27,932 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-12-06 16:57:27,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 16:57:27,969 INFO L225 Difference]: With dead ends: 73274 [2021-12-06 16:57:27,969 INFO L226 Difference]: Without dead ends: 34568 [2021-12-06 16:57:27,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-06 16:57:27,997 INFO L933 BasicCegarLoop]: 1506 mSDtfsCounter, 4552 mSDsluCounter, 1489 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4552 SdHoareTripleChecker+Valid, 2995 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 16:57:27,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4552 Valid, 2995 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 16:57:28,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34568 states. [2021-12-06 16:57:30,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34568 to 34568. [2021-12-06 16:57:30,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34568 states, 34566 states have (on average 1.2821558757160216) internal successors, (44319), 34567 states have internal predecessors, (44319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:30,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34568 states to 34568 states and 44319 transitions. [2021-12-06 16:57:30,110 INFO L78 Accepts]: Start accepts. Automaton has 34568 states and 44319 transitions. Word has length 83 [2021-12-06 16:57:30,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 16:57:30,110 INFO L470 AbstractCegarLoop]: Abstraction has 34568 states and 44319 transitions. [2021-12-06 16:57:30,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:30,110 INFO L276 IsEmpty]: Start isEmpty. Operand 34568 states and 44319 transitions. [2021-12-06 16:57:30,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-06 16:57:30,112 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 16:57:30,112 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 16:57:30,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-06 16:57:30,112 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 16:57:30,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 16:57:30,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1521824328, now seen corresponding path program 1 times [2021-12-06 16:57:30,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 16:57:30,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869047226] [2021-12-06 16:57:30,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:57:30,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 16:57:30,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:57:30,190 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 16:57:30,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 16:57:30,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869047226] [2021-12-06 16:57:30,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869047226] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 16:57:30,191 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 16:57:30,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 16:57:30,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812560358] [2021-12-06 16:57:30,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 16:57:30,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 16:57:30,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 16:57:30,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 16:57:30,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 16:57:30,192 INFO L87 Difference]: Start difference. First operand 34568 states and 44319 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:31,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 16:57:31,437 INFO L93 Difference]: Finished difference Result 51781 states and 65849 transitions. [2021-12-06 16:57:31,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 16:57:31,438 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-12-06 16:57:31,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 16:57:31,455 INFO L225 Difference]: With dead ends: 51781 [2021-12-06 16:57:31,455 INFO L226 Difference]: Without dead ends: 18963 [2021-12-06 16:57:31,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-06 16:57:31,468 INFO L933 BasicCegarLoop]: 1506 mSDtfsCounter, 4612 mSDsluCounter, 1472 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4612 SdHoareTripleChecker+Valid, 2978 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 16:57:31,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4612 Valid, 2978 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 16:57:31,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18963 states. [2021-12-06 16:57:32,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18963 to 18963. [2021-12-06 16:57:32,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18963 states, 18961 states have (on average 1.2808923579979958) internal successors, (24287), 18962 states have internal predecessors, (24287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:32,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18963 states to 18963 states and 24287 transitions. [2021-12-06 16:57:32,725 INFO L78 Accepts]: Start accepts. Automaton has 18963 states and 24287 transitions. Word has length 83 [2021-12-06 16:57:32,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 16:57:32,725 INFO L470 AbstractCegarLoop]: Abstraction has 18963 states and 24287 transitions. [2021-12-06 16:57:32,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:32,725 INFO L276 IsEmpty]: Start isEmpty. Operand 18963 states and 24287 transitions. [2021-12-06 16:57:32,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-06 16:57:32,727 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 16:57:32,727 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 16:57:32,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-06 16:57:32,727 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 16:57:32,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 16:57:32,727 INFO L85 PathProgramCache]: Analyzing trace with hash -460055256, now seen corresponding path program 1 times [2021-12-06 16:57:32,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 16:57:32,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097542598] [2021-12-06 16:57:32,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:57:32,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 16:57:32,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:57:32,767 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 16:57:32,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 16:57:32,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097542598] [2021-12-06 16:57:32,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097542598] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 16:57:32,767 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 16:57:32,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 16:57:32,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154319941] [2021-12-06 16:57:32,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 16:57:32,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 16:57:32,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 16:57:32,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 16:57:32,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 16:57:32,769 INFO L87 Difference]: Start difference. First operand 18963 states and 24287 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:33,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 16:57:33,990 INFO L93 Difference]: Finished difference Result 32501 states and 41040 transitions. [2021-12-06 16:57:33,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 16:57:33,991 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-12-06 16:57:33,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 16:57:34,005 INFO L225 Difference]: With dead ends: 32501 [2021-12-06 16:57:34,005 INFO L226 Difference]: Without dead ends: 15140 [2021-12-06 16:57:34,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-06 16:57:34,016 INFO L933 BasicCegarLoop]: 1506 mSDtfsCounter, 4617 mSDsluCounter, 1470 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4617 SdHoareTripleChecker+Valid, 2976 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 16:57:34,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4617 Valid, 2976 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 16:57:34,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15140 states. [2021-12-06 16:57:34,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15140 to 15140. [2021-12-06 16:57:34,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15140 states, 15138 states have (on average 1.2841194345356057) internal successors, (19439), 15139 states have internal predecessors, (19439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:35,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15140 states to 15140 states and 19439 transitions. [2021-12-06 16:57:35,008 INFO L78 Accepts]: Start accepts. Automaton has 15140 states and 19439 transitions. Word has length 83 [2021-12-06 16:57:35,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 16:57:35,008 INFO L470 AbstractCegarLoop]: Abstraction has 15140 states and 19439 transitions. [2021-12-06 16:57:35,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:57:35,008 INFO L276 IsEmpty]: Start isEmpty. Operand 15140 states and 19439 transitions. [2021-12-06 16:57:35,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-06 16:57:35,009 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 16:57:35,010 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 16:57:35,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-06 16:57:35,010 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 16:57:35,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 16:57:35,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1663669571, now seen corresponding path program 1 times [2021-12-06 16:57:35,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 16:57:35,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72540454] [2021-12-06 16:57:35,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:57:35,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 16:57:35,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:57:35,179 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 16:57:35,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 16:57:35,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72540454] [2021-12-06 16:57:35,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72540454] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 16:57:35,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047325534] [2021-12-06 16:57:35,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:57:35,180 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 16:57:35,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a5f90d-ec4e-45dc-aef3-b348b224ef9a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 16:57:35,180 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a5f90d-ec4e-45dc-aef3-b348b224ef9a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 16:57:35,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a5f90d-ec4e-45dc-aef3-b348b224ef9a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 16:57:35,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:57:35,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-06 16:57:35,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 16:57:56,720 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 16:57:56,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 16:58:01,152 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 16:58:01,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047325534] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 16:58:01,152 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 16:58:01,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 20] total 46 [2021-12-06 16:58:01,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032106326] [2021-12-06 16:58:01,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 16:58:01,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-06 16:58:01,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 16:58:01,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-06 16:58:01,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=1798, Unknown=2, NotChecked=0, Total=2070 [2021-12-06 16:58:01,155 INFO L87 Difference]: Start difference. First operand 15140 states and 19439 transitions. Second operand has 46 states, 46 states have (on average 4.869565217391305) internal successors, (224), 46 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:58:34,160 WARN L227 SmtUtils]: Spent 20.85s on a formula simplification. DAG size of input: 97 DAG size of output: 91 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 16:58:48,968 WARN L227 SmtUtils]: Spent 10.22s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 16:58:53,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 16:58:53,578 INFO L93 Difference]: Finished difference Result 35436 states and 43442 transitions. [2021-12-06 16:58:53,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-06 16:58:53,579 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 4.869565217391305) internal successors, (224), 46 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-12-06 16:58:53,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 16:58:53,598 INFO L225 Difference]: With dead ends: 35436 [2021-12-06 16:58:53,598 INFO L226 Difference]: Without dead ends: 23317 [2021-12-06 16:58:53,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 67.0s TimeCoverageRelationStatistics Valid=931, Invalid=3617, Unknown=8, NotChecked=0, Total=4556 [2021-12-06 16:58:53,607 INFO L933 BasicCegarLoop]: 1549 mSDtfsCounter, 18025 mSDsluCounter, 19140 mSDsCounter, 0 mSdLazyCounter, 1044 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18025 SdHoareTripleChecker+Valid, 20689 SdHoareTripleChecker+Invalid, 1159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-06 16:58:53,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18025 Valid, 20689 Invalid, 1159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1044 Invalid, 0 Unknown, 36 Unchecked, 2.7s Time] [2021-12-06 16:58:53,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23317 states. [2021-12-06 16:58:54,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23317 to 15225. [2021-12-06 16:58:54,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15225 states, 15223 states have (on average 1.283321290153058) internal successors, (19536), 15224 states have internal predecessors, (19536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:58:54,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15225 states to 15225 states and 19536 transitions. [2021-12-06 16:58:54,742 INFO L78 Accepts]: Start accepts. Automaton has 15225 states and 19536 transitions. Word has length 84 [2021-12-06 16:58:54,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 16:58:54,742 INFO L470 AbstractCegarLoop]: Abstraction has 15225 states and 19536 transitions. [2021-12-06 16:58:54,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 4.869565217391305) internal successors, (224), 46 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:58:54,743 INFO L276 IsEmpty]: Start isEmpty. Operand 15225 states and 19536 transitions. [2021-12-06 16:58:54,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-06 16:58:54,744 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 16:58:54,744 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 16:58:54,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a5f90d-ec4e-45dc-aef3-b348b224ef9a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-06 16:58:54,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a5f90d-ec4e-45dc-aef3-b348b224ef9a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-06 16:58:54,945 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 16:58:54,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 16:58:54,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1055776552, now seen corresponding path program 1 times [2021-12-06 16:58:54,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 16:58:54,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383716808] [2021-12-06 16:58:54,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:58:54,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 16:58:54,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:58:55,088 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 16:58:55,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 16:58:55,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383716808] [2021-12-06 16:58:55,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383716808] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 16:58:55,089 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 16:58:55,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 16:58:55,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059826209] [2021-12-06 16:58:55,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 16:58:55,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 16:58:55,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 16:58:55,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 16:58:55,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 16:58:55,090 INFO L87 Difference]: Start difference. First operand 15225 states and 19536 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:58:57,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 16:58:57,780 INFO L93 Difference]: Finished difference Result 45844 states and 57434 transitions. [2021-12-06 16:58:57,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 16:58:57,780 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-12-06 16:58:57,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 16:58:57,809 INFO L225 Difference]: With dead ends: 45844 [2021-12-06 16:58:57,809 INFO L226 Difference]: Without dead ends: 32193 [2021-12-06 16:58:57,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-06 16:58:57,819 INFO L933 BasicCegarLoop]: 1506 mSDtfsCounter, 4730 mSDsluCounter, 1566 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4730 SdHoareTripleChecker+Valid, 3072 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 16:58:57,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4730 Valid, 3072 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 16:58:57,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32193 states. [2021-12-06 16:59:00,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32193 to 28267. [2021-12-06 16:59:00,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28267 states, 28265 states have (on average 1.2468777640191049) internal successors, (35243), 28266 states have internal predecessors, (35243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:59:00,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28267 states to 28267 states and 35243 transitions. [2021-12-06 16:59:00,050 INFO L78 Accepts]: Start accepts. Automaton has 28267 states and 35243 transitions. Word has length 84 [2021-12-06 16:59:00,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 16:59:00,051 INFO L470 AbstractCegarLoop]: Abstraction has 28267 states and 35243 transitions. [2021-12-06 16:59:00,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:59:00,051 INFO L276 IsEmpty]: Start isEmpty. Operand 28267 states and 35243 transitions. [2021-12-06 16:59:00,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-06 16:59:00,052 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 16:59:00,052 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 16:59:00,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-06 16:59:00,052 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 16:59:00,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 16:59:00,053 INFO L85 PathProgramCache]: Analyzing trace with hash -260780419, now seen corresponding path program 1 times [2021-12-06 16:59:00,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 16:59:00,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818622423] [2021-12-06 16:59:00,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:59:00,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 16:59:00,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:59:03,557 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 16:59:03,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 16:59:03,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818622423] [2021-12-06 16:59:03,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818622423] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 16:59:03,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743624101] [2021-12-06 16:59:03,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:59:03,558 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 16:59:03,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a5f90d-ec4e-45dc-aef3-b348b224ef9a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 16:59:03,559 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a5f90d-ec4e-45dc-aef3-b348b224ef9a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 16:59:03,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a5f90d-ec4e-45dc-aef3-b348b224ef9a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 16:59:03,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:59:03,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-06 16:59:03,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 16:59:11,789 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 16:59:11,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 16:59:18,887 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 16:59:18,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743624101] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 16:59:18,887 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 16:59:18,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 18, 17] total 53 [2021-12-06 16:59:18,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274057314] [2021-12-06 16:59:18,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 16:59:18,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-06 16:59:18,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 16:59:18,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-06 16:59:18,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=2499, Unknown=0, NotChecked=0, Total=2756 [2021-12-06 16:59:18,890 INFO L87 Difference]: Start difference. First operand 28267 states and 35243 transitions. Second operand has 53 states, 53 states have (on average 4.3584905660377355) internal successors, (231), 53 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:03:10,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:03:10,598 INFO L93 Difference]: Finished difference Result 152602 states and 181981 transitions. [2021-12-06 17:03:10,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 414 states. [2021-12-06 17:03:10,598 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 4.3584905660377355) internal successors, (231), 53 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-12-06 17:03:10,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:03:10,762 INFO L225 Difference]: With dead ends: 152602 [2021-12-06 17:03:10,762 INFO L226 Difference]: Without dead ends: 138463 [2021-12-06 17:03:10,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 596 GetRequests, 142 SyntacticMatches, 2 SemanticMatches, 452 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91251 ImplicationChecksByTransitivity, 206.5s TimeCoverageRelationStatistics Valid=21451, Invalid=184211, Unknown=0, NotChecked=0, Total=205662 [2021-12-06 17:03:10,810 INFO L933 BasicCegarLoop]: 1839 mSDtfsCounter, 18526 mSDsluCounter, 38538 mSDsCounter, 0 mSdLazyCounter, 5078 mSolverCounterSat, 677 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18526 SdHoareTripleChecker+Valid, 40377 SdHoareTripleChecker+Invalid, 5755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 677 IncrementalHoareTripleChecker+Valid, 5078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.8s IncrementalHoareTripleChecker+Time [2021-12-06 17:03:10,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18526 Valid, 40377 Invalid, 5755 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [677 Valid, 5078 Invalid, 0 Unknown, 0 Unchecked, 17.8s Time] [2021-12-06 17:03:10,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138463 states. [2021-12-06 17:03:15,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138463 to 37427. [2021-12-06 17:03:15,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37427 states, 37425 states have (on average 1.242378089512358) internal successors, (46496), 37426 states have internal predecessors, (46496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:03:15,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37427 states to 37427 states and 46496 transitions. [2021-12-06 17:03:15,419 INFO L78 Accepts]: Start accepts. Automaton has 37427 states and 46496 transitions. Word has length 85 [2021-12-06 17:03:15,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:03:15,419 INFO L470 AbstractCegarLoop]: Abstraction has 37427 states and 46496 transitions. [2021-12-06 17:03:15,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 4.3584905660377355) internal successors, (231), 53 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:03:15,419 INFO L276 IsEmpty]: Start isEmpty. Operand 37427 states and 46496 transitions. [2021-12-06 17:03:15,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-06 17:03:15,420 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:03:15,420 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:03:15,440 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a5f90d-ec4e-45dc-aef3-b348b224ef9a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 17:03:15,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a5f90d-ec4e-45dc-aef3-b348b224ef9a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-06 17:03:15,622 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:03:15,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:03:15,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1764570563, now seen corresponding path program 1 times [2021-12-06 17:03:15,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:03:15,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560432670] [2021-12-06 17:03:15,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:03:15,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:03:15,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:03:16,791 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:03:16,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:03:16,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560432670] [2021-12-06 17:03:16,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560432670] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:03:16,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365224774] [2021-12-06 17:03:16,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:03:16,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:03:16,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a5f90d-ec4e-45dc-aef3-b348b224ef9a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:03:16,792 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a5f90d-ec4e-45dc-aef3-b348b224ef9a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:03:16,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a5f90d-ec4e-45dc-aef3-b348b224ef9a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 17:03:16,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:03:16,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 17:03:16,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:03:20,685 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:03:20,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:03:24,056 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:03:24,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365224774] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:03:24,056 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:03:24,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2021-12-06 17:03:24,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367987529] [2021-12-06 17:03:24,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:03:24,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-06 17:03:24,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:03:24,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-06 17:03:24,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=876, Unknown=0, NotChecked=0, Total=992 [2021-12-06 17:03:24,057 INFO L87 Difference]: Start difference. First operand 37427 states and 46496 transitions. Second operand has 32 states, 32 states have (on average 6.59375) internal successors, (211), 32 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:03:49,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:03:49,156 INFO L93 Difference]: Finished difference Result 132378 states and 164511 transitions. [2021-12-06 17:03:49,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-06 17:03:49,157 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 6.59375) internal successors, (211), 32 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-12-06 17:03:49,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:03:49,296 INFO L225 Difference]: With dead ends: 132378 [2021-12-06 17:03:49,296 INFO L226 Difference]: Without dead ends: 118219 [2021-12-06 17:03:49,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 150 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=774, Invalid=2886, Unknown=0, NotChecked=0, Total=3660 [2021-12-06 17:03:49,318 INFO L933 BasicCegarLoop]: 1666 mSDtfsCounter, 10267 mSDsluCounter, 15413 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10267 SdHoareTripleChecker+Valid, 17079 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-06 17:03:49,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10267 Valid, 17079 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-06 17:03:49,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118219 states. [2021-12-06 17:03:55,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118219 to 41656. [2021-12-06 17:03:55,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41656 states, 41654 states have (on average 1.24033706246699) internal successors, (51665), 41655 states have internal predecessors, (51665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:03:55,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41656 states to 41656 states and 51665 transitions. [2021-12-06 17:03:55,095 INFO L78 Accepts]: Start accepts. Automaton has 41656 states and 51665 transitions. Word has length 85 [2021-12-06 17:03:55,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:03:55,095 INFO L470 AbstractCegarLoop]: Abstraction has 41656 states and 51665 transitions. [2021-12-06 17:03:55,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 6.59375) internal successors, (211), 32 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:03:55,095 INFO L276 IsEmpty]: Start isEmpty. Operand 41656 states and 51665 transitions. [2021-12-06 17:03:55,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-06 17:03:55,096 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:03:55,096 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:03:55,115 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a5f90d-ec4e-45dc-aef3-b348b224ef9a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 17:03:55,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a5f90d-ec4e-45dc-aef3-b348b224ef9a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-06 17:03:55,298 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:03:55,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:03:55,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1270984347, now seen corresponding path program 1 times [2021-12-06 17:03:55,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:03:55,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315717579] [2021-12-06 17:03:55,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:03:55,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:03:55,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:03:56,498 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:03:56,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:03:56,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315717579] [2021-12-06 17:03:56,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315717579] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:03:56,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224379962] [2021-12-06 17:03:56,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:03:56,498 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:03:56,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a5f90d-ec4e-45dc-aef3-b348b224ef9a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:03:56,499 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a5f90d-ec4e-45dc-aef3-b348b224ef9a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:03:56,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a5f90d-ec4e-45dc-aef3-b348b224ef9a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 17:03:56,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:03:56,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 17:03:56,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:04:00,577 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:04:00,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:04:05,678 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:04:05,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224379962] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:04:05,679 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:04:05,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 37 [2021-12-06 17:04:05,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585112511] [2021-12-06 17:04:05,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:04:05,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-06 17:04:05,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:04:05,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-06 17:04:05,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1196, Unknown=0, NotChecked=0, Total=1332 [2021-12-06 17:04:05,680 INFO L87 Difference]: Start difference. First operand 41656 states and 51665 transitions. Second operand has 37 states, 37 states have (on average 6.378378378378378) internal successors, (236), 37 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:04:29,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:04:29,039 INFO L93 Difference]: Finished difference Result 104264 states and 125974 transitions. [2021-12-06 17:04:29,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-06 17:04:29,040 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 6.378378378378378) internal successors, (236), 37 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-12-06 17:04:29,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:04:29,126 INFO L225 Difference]: With dead ends: 104264 [2021-12-06 17:04:29,126 INFO L226 Difference]: Without dead ends: 83784 [2021-12-06 17:04:29,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 871 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=877, Invalid=4093, Unknown=0, NotChecked=0, Total=4970 [2021-12-06 17:04:29,142 INFO L933 BasicCegarLoop]: 1654 mSDtfsCounter, 20602 mSDsluCounter, 25858 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20602 SdHoareTripleChecker+Valid, 27512 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-06 17:04:29,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20602 Valid, 27512 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-06 17:04:29,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83784 states. [2021-12-06 17:04:35,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83784 to 46811. [2021-12-06 17:04:35,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46811 states, 46809 states have (on average 1.2441624473925954) internal successors, (58238), 46810 states have internal predecessors, (58238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:04:35,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46811 states to 46811 states and 58238 transitions. [2021-12-06 17:04:35,736 INFO L78 Accepts]: Start accepts. Automaton has 46811 states and 58238 transitions. Word has length 86 [2021-12-06 17:04:35,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:04:35,736 INFO L470 AbstractCegarLoop]: Abstraction has 46811 states and 58238 transitions. [2021-12-06 17:04:35,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 6.378378378378378) internal successors, (236), 37 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:04:35,736 INFO L276 IsEmpty]: Start isEmpty. Operand 46811 states and 58238 transitions. [2021-12-06 17:04:35,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-06 17:04:35,738 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:04:35,738 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:04:35,757 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a5f90d-ec4e-45dc-aef3-b348b224ef9a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 17:04:35,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a5f90d-ec4e-45dc-aef3-b348b224ef9a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:04:35,940 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:04:35,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:04:35,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1004127617, now seen corresponding path program 1 times [2021-12-06 17:04:35,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:04:35,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256000382] [2021-12-06 17:04:35,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:04:35,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:04:35,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:04:36,065 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:04:36,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:04:36,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256000382] [2021-12-06 17:04:36,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256000382] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:04:36,066 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:04:36,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:04:36,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145678202] [2021-12-06 17:04:36,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:04:36,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:04:36,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:04:36,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:04:36,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:04:36,067 INFO L87 Difference]: Start difference. First operand 46811 states and 58238 transitions. Second operand has 4 states, 4 states have (on average 30.25) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:04:55,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:04:55,991 INFO L93 Difference]: Finished difference Result 50576 states and 65244 transitions. [2021-12-06 17:04:55,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:04:55,991 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-12-06 17:04:55,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:04:56,041 INFO L225 Difference]: With dead ends: 50576 [2021-12-06 17:04:56,041 INFO L226 Difference]: Without dead ends: 49072 [2021-12-06 17:04:56,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:04:56,050 INFO L933 BasicCegarLoop]: 280 mSDtfsCounter, 2486 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 3612 mSolverCounterSat, 1540 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2486 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 5152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1540 IncrementalHoareTripleChecker+Valid, 3612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:04:56,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2486 Valid, 297 Invalid, 5152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1540 Valid, 3612 Invalid, 0 Unknown, 0 Unchecked, 13.1s Time] [2021-12-06 17:04:56,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49072 states. [2021-12-06 17:05:02,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49072 to 49064. [2021-12-06 17:05:02,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49064 states, 49062 states have (on average 1.2531490766784885) internal successors, (61482), 49063 states have internal predecessors, (61482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:05:02,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49064 states to 49064 states and 61482 transitions. [2021-12-06 17:05:02,791 INFO L78 Accepts]: Start accepts. Automaton has 49064 states and 61482 transitions. Word has length 121 [2021-12-06 17:05:02,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:05:02,791 INFO L470 AbstractCegarLoop]: Abstraction has 49064 states and 61482 transitions. [2021-12-06 17:05:02,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:05:02,791 INFO L276 IsEmpty]: Start isEmpty. Operand 49064 states and 61482 transitions. [2021-12-06 17:05:02,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-12-06 17:05:02,795 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:05:02,795 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:05:02,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-06 17:05:02,795 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:05:02,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:05:02,796 INFO L85 PathProgramCache]: Analyzing trace with hash 615569687, now seen corresponding path program 1 times [2021-12-06 17:05:02,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:05:02,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064784836] [2021-12-06 17:05:02,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:05:02,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:05:02,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:05:03,780 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 24 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:05:03,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:05:03,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064784836] [2021-12-06 17:05:03,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064784836] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:05:03,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338982562] [2021-12-06 17:05:03,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:05:03,781 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:05:03,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a5f90d-ec4e-45dc-aef3-b348b224ef9a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:05:03,782 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a5f90d-ec4e-45dc-aef3-b348b224ef9a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:05:03,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a5f90d-ec4e-45dc-aef3-b348b224ef9a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 17:05:03,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:05:03,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 17:05:03,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:05:32,086 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 26 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:05:32,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:05:38,428 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 24 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:05:38,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338982562] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:05:38,429 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:05:38,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2021-12-06 17:05:38,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914915121] [2021-12-06 17:05:38,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:05:38,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-06 17:05:38,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:05:38,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-06 17:05:38,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=807, Unknown=9, NotChecked=0, Total=930 [2021-12-06 17:05:38,430 INFO L87 Difference]: Start difference. First operand 49064 states and 61482 transitions. Second operand has 31 states, 31 states have (on average 11.548387096774194) internal successors, (358), 30 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:06:59,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:06:59,367 INFO L93 Difference]: Finished difference Result 111261 states and 137587 transitions. [2021-12-06 17:06:59,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-06 17:06:59,368 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 11.548387096774194) internal successors, (358), 30 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2021-12-06 17:06:59,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:06:59,468 INFO L225 Difference]: With dead ends: 111261 [2021-12-06 17:06:59,468 INFO L226 Difference]: Without dead ends: 92755 [2021-12-06 17:06:59,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 265 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 81.5s TimeCoverageRelationStatistics Valid=573, Invalid=3432, Unknown=27, NotChecked=0, Total=4032 [2021-12-06 17:06:59,488 INFO L933 BasicCegarLoop]: 1595 mSDtfsCounter, 18909 mSDsluCounter, 10967 mSDsCounter, 0 mSdLazyCounter, 1234 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18909 SdHoareTripleChecker+Valid, 12562 SdHoareTripleChecker+Invalid, 4429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3095 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-12-06 17:06:59,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18909 Valid, 12562 Invalid, 4429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1234 Invalid, 0 Unknown, 3095 Unchecked, 4.8s Time] [2021-12-06 17:06:59,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92755 states. [2021-12-06 17:07:11,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92755 to 71282. [2021-12-06 17:07:11,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71282 states, 71280 states have (on average 1.2403759820426488) internal successors, (88414), 71281 states have internal predecessors, (88414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:07:11,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71282 states to 71282 states and 88414 transitions. [2021-12-06 17:07:11,416 INFO L78 Accepts]: Start accepts. Automaton has 71282 states and 88414 transitions. Word has length 139 [2021-12-06 17:07:11,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:07:11,416 INFO L470 AbstractCegarLoop]: Abstraction has 71282 states and 88414 transitions. [2021-12-06 17:07:11,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 11.548387096774194) internal successors, (358), 30 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:07:11,416 INFO L276 IsEmpty]: Start isEmpty. Operand 71282 states and 88414 transitions. [2021-12-06 17:07:11,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-12-06 17:07:11,421 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:07:11,421 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:07:11,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a5f90d-ec4e-45dc-aef3-b348b224ef9a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-06 17:07:11,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a5f90d-ec4e-45dc-aef3-b348b224ef9a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:07:11,623 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:07:11,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:07:11,624 INFO L85 PathProgramCache]: Analyzing trace with hash -516070153, now seen corresponding path program 1 times [2021-12-06 17:07:11,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:07:11,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148695168] [2021-12-06 17:07:11,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:07:11,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:07:11,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:07:12,262 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 16 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:07:12,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:07:12,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148695168] [2021-12-06 17:07:12,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148695168] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:07:12,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133875122] [2021-12-06 17:07:12,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:07:12,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:07:12,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a5f90d-ec4e-45dc-aef3-b348b224ef9a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:07:12,264 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a5f90d-ec4e-45dc-aef3-b348b224ef9a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:07:12,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a5f90d-ec4e-45dc-aef3-b348b224ef9a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 17:07:12,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:07:12,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-06 17:07:12,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:07:46,164 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 35 proven. 73 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:07:46,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:07:53,062 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 33 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:07:53,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133875122] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:07:53,062 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:07:53,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2021-12-06 17:07:53,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714046604] [2021-12-06 17:07:53,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:07:53,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-06 17:07:53,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:07:53,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-06 17:07:53,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=820, Unknown=14, NotChecked=0, Total=930 [2021-12-06 17:07:53,064 INFO L87 Difference]: Start difference. First operand 71282 states and 88414 transitions. Second operand has 31 states, 31 states have (on average 12.548387096774194) internal successors, (389), 30 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)