./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext3-properties/dll_nondet_free_order-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext3-properties/dll_nondet_free_order-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f6eaec015dd6fdb220ef146938a83a65106037c982563310cbbb34d0417543f1 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 08:34:39,829 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 08:34:39,831 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 08:34:39,890 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 08:34:39,891 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 08:34:39,892 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 08:34:39,894 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 08:34:39,896 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 08:34:39,898 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 08:34:39,899 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 08:34:39,900 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 08:34:39,901 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 08:34:39,902 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 08:34:39,903 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 08:34:39,905 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 08:34:39,906 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 08:34:39,908 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 08:34:39,909 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 08:34:39,911 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 08:34:39,914 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 08:34:39,916 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 08:34:39,918 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 08:34:39,919 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 08:34:39,921 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 08:34:39,924 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 08:34:39,925 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 08:34:39,925 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 08:34:39,927 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 08:34:39,927 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 08:34:39,928 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 08:34:39,929 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 08:34:39,930 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 08:34:39,931 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 08:34:39,932 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 08:34:39,933 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 08:34:39,934 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 08:34:39,935 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 08:34:39,935 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 08:34:39,935 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 08:34:39,937 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 08:34:39,938 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 08:34:39,939 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-28 08:34:39,966 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 08:34:39,967 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 08:34:39,967 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 08:34:39,968 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 08:34:39,969 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 08:34:39,970 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 08:34:39,970 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 08:34:39,970 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 08:34:39,971 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 08:34:39,971 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 08:34:39,972 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 08:34:39,972 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 08:34:39,972 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 08:34:39,973 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-28 08:34:39,973 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-28 08:34:39,974 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-28 08:34:39,974 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 08:34:39,974 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-28 08:34:39,975 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 08:34:39,975 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 08:34:39,976 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 08:34:39,976 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 08:34:39,976 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 08:34:39,976 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 08:34:39,977 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 08:34:39,977 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 08:34:39,977 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 08:34:39,978 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 08:34:39,978 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 08:34:39,978 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_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f6eaec015dd6fdb220ef146938a83a65106037c982563310cbbb34d0417543f1 [2021-10-28 08:34:40,238 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 08:34:40,258 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 08:34:40,261 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 08:34:40,262 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 08:34:40,263 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 08:34:40,264 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/list-ext3-properties/dll_nondet_free_order-1.i [2021-10-28 08:34:40,343 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/data/7b4def9f6/19aa5920753d4865b0afebd78c943157/FLAG2344eb8a9 [2021-10-28 08:34:40,859 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 08:34:40,862 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/sv-benchmarks/c/list-ext3-properties/dll_nondet_free_order-1.i [2021-10-28 08:34:40,875 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/data/7b4def9f6/19aa5920753d4865b0afebd78c943157/FLAG2344eb8a9 [2021-10-28 08:34:41,148 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/data/7b4def9f6/19aa5920753d4865b0afebd78c943157 [2021-10-28 08:34:41,151 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 08:34:41,153 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-28 08:34:41,159 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 08:34:41,159 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 08:34:41,163 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 08:34:41,163 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:34:41" (1/1) ... [2021-10-28 08:34:41,165 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@697fe25f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:34:41, skipping insertion in model container [2021-10-28 08:34:41,165 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:34:41" (1/1) ... [2021-10-28 08:34:41,173 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 08:34:41,230 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 08:34:41,624 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 08:34:41,640 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 08:34:41,697 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 08:34:41,739 INFO L208 MainTranslator]: Completed translation [2021-10-28 08:34:41,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:34:41 WrapperNode [2021-10-28 08:34:41,740 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 08:34:41,741 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 08:34:41,741 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 08:34:41,741 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 08:34:41,753 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:34:41" (1/1) ... [2021-10-28 08:34:41,755 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:34:41" (1/1) ... [2021-10-28 08:34:41,792 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:34:41" (1/1) ... [2021-10-28 08:34:41,793 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:34:41" (1/1) ... [2021-10-28 08:34:41,815 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:34:41" (1/1) ... [2021-10-28 08:34:41,819 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:34:41" (1/1) ... [2021-10-28 08:34:41,832 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:34:41" (1/1) ... [2021-10-28 08:34:41,847 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 08:34:41,848 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 08:34:41,848 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 08:34:41,848 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 08:34:41,864 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:34:41" (1/1) ... [2021-10-28 08:34:41,872 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 08:34:41,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:34:41,910 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 08:34:41,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 08:34:41,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-28 08:34:41,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 08:34:41,962 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-28 08:34:41,962 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-28 08:34:41,962 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-10-28 08:34:41,962 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_create [2021-10-28 08:34:41,963 INFO L138 BoogieDeclarations]: Found implementation of procedure _destroy_in_nondeterministic_order [2021-10-28 08:34:41,963 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-28 08:34:41,964 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-28 08:34:41,964 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-28 08:34:41,964 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-28 08:34:41,965 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-28 08:34:41,965 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-28 08:34:41,965 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-28 08:34:41,965 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-28 08:34:41,966 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-28 08:34:41,966 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-28 08:34:41,966 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-28 08:34:41,966 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-28 08:34:41,966 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-28 08:34:41,966 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-28 08:34:41,966 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-28 08:34:41,967 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-28 08:34:41,967 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-28 08:34:41,967 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-28 08:34:41,967 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-28 08:34:41,967 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-28 08:34:41,967 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-28 08:34:41,968 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-28 08:34:41,968 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-28 08:34:41,968 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-28 08:34:41,968 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-28 08:34:41,969 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-28 08:34:41,969 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-28 08:34:41,969 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-28 08:34:41,969 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-28 08:34:41,969 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-28 08:34:41,969 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-28 08:34:41,970 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-28 08:34:41,970 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-28 08:34:41,970 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-28 08:34:41,970 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-28 08:34:41,970 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-28 08:34:41,970 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-28 08:34:41,970 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-28 08:34:41,971 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-28 08:34:41,971 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-28 08:34:41,971 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-28 08:34:41,971 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-28 08:34:41,972 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-28 08:34:41,972 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-28 08:34:41,972 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-28 08:34:41,973 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-28 08:34:41,973 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-28 08:34:41,973 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-28 08:34:41,973 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-28 08:34:41,974 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-28 08:34:41,974 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-28 08:34:41,974 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-28 08:34:41,974 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-28 08:34:41,974 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-28 08:34:41,974 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-28 08:34:41,975 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-28 08:34:41,975 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-28 08:34:41,975 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-28 08:34:41,975 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-10-28 08:34:41,976 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-28 08:34:41,976 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-28 08:34:41,977 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-28 08:34:41,977 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-28 08:34:41,978 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-28 08:34:41,978 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-28 08:34:41,978 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-28 08:34:41,978 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-28 08:34:41,979 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-28 08:34:41,979 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-28 08:34:41,979 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-28 08:34:41,979 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-28 08:34:41,979 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-28 08:34:41,979 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-28 08:34:41,979 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-28 08:34:41,980 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-28 08:34:41,980 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-28 08:34:41,981 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-28 08:34:41,981 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-28 08:34:41,981 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-28 08:34:41,981 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-28 08:34:41,981 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-28 08:34:41,981 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-28 08:34:41,982 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-28 08:34:41,982 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-28 08:34:41,982 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-28 08:34:41,982 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-28 08:34:41,982 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-28 08:34:41,982 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-28 08:34:41,982 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-28 08:34:41,983 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-28 08:34:41,983 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-28 08:34:41,983 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-28 08:34:41,983 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-28 08:34:41,983 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-28 08:34:41,983 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-28 08:34:41,984 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-28 08:34:41,984 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-28 08:34:41,984 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-28 08:34:41,984 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-28 08:34:41,985 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-28 08:34:41,985 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-28 08:34:41,985 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-28 08:34:41,985 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-28 08:34:41,985 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-28 08:34:41,985 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-28 08:34:41,986 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-28 08:34:41,986 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-28 08:34:41,986 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-10-28 08:34:41,987 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_create [2021-10-28 08:34:41,987 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-28 08:34:41,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-28 08:34:41,987 INFO L130 BoogieDeclarations]: Found specification of procedure _destroy_in_nondeterministic_order [2021-10-28 08:34:41,987 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-28 08:34:41,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 08:34:41,988 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-28 08:34:41,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-28 08:34:41,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 08:34:42,538 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-10-28 08:34:42,564 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 08:34:42,564 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-10-28 08:34:42,566 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:34:42 BoogieIcfgContainer [2021-10-28 08:34:42,566 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 08:34:42,568 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 08:34:42,568 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 08:34:42,572 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 08:34:42,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 08:34:41" (1/3) ... [2021-10-28 08:34:42,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@755a2f9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:34:42, skipping insertion in model container [2021-10-28 08:34:42,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:34:41" (2/3) ... [2021-10-28 08:34:42,594 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@755a2f9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:34:42, skipping insertion in model container [2021-10-28 08:34:42,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:34:42" (3/3) ... [2021-10-28 08:34:42,597 INFO L111 eAbstractionObserver]: Analyzing ICFG dll_nondet_free_order-1.i [2021-10-28 08:34:42,602 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 08:34:42,610 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 62 error locations. [2021-10-28 08:34:42,650 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 08:34:42,656 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-28 08:34:42,657 INFO L340 AbstractCegarLoop]: Starting to check reachability of 62 error locations. [2021-10-28 08:34:42,674 INFO L276 IsEmpty]: Start isEmpty. Operand has 152 states, 79 states have (on average 1.8987341772151898) internal successors, (150), 142 states have internal predecessors, (150), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-28 08:34:42,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-28 08:34:42,681 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:34:42,681 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:34:42,682 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting dll_circular_createErr0REQUIRES_VIOLATION === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-28 08:34:42,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:34:42,687 INFO L85 PathProgramCache]: Analyzing trace with hash -23350716, now seen corresponding path program 1 times [2021-10-28 08:34:42,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:34:42,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939637639] [2021-10-28 08:34:42,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:34:42,697 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:34:42,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:34:42,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:34:42,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:34:42,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:34:42,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:34:42,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939637639] [2021-10-28 08:34:42,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939637639] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:34:42,876 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:34:42,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 08:34:42,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739983184] [2021-10-28 08:34:42,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 08:34:42,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:34:42,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 08:34:42,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:34:42,898 INFO L87 Difference]: Start difference. First operand has 152 states, 79 states have (on average 1.8987341772151898) internal successors, (150), 142 states have internal predecessors, (150), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:34:43,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:34:43,148 INFO L93 Difference]: Finished difference Result 149 states and 156 transitions. [2021-10-28 08:34:43,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 08:34:43,149 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-10-28 08:34:43,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:34:43,161 INFO L225 Difference]: With dead ends: 149 [2021-10-28 08:34:43,162 INFO L226 Difference]: Without dead ends: 142 [2021-10-28 08:34:43,164 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:34:43,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-10-28 08:34:43,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-10-28 08:34:43,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 76 states have (on average 1.8421052631578947) internal successors, (140), 134 states have internal predecessors, (140), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 08:34:43,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 147 transitions. [2021-10-28 08:34:43,232 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 147 transitions. Word has length 10 [2021-10-28 08:34:43,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:34:43,232 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 147 transitions. [2021-10-28 08:34:43,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:34:43,233 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 147 transitions. [2021-10-28 08:34:43,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-28 08:34:43,233 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:34:43,233 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:34:43,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 08:34:43,234 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting dll_circular_createErr1REQUIRES_VIOLATION === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-28 08:34:43,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:34:43,234 INFO L85 PathProgramCache]: Analyzing trace with hash -23350715, now seen corresponding path program 1 times [2021-10-28 08:34:43,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:34:43,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816122351] [2021-10-28 08:34:43,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:34:43,235 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:34:43,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:34:43,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:34:43,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:34:43,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:34:43,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:34:43,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816122351] [2021-10-28 08:34:43,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816122351] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:34:43,319 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:34:43,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 08:34:43,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868433191] [2021-10-28 08:34:43,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 08:34:43,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:34:43,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 08:34:43,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:34:43,323 INFO L87 Difference]: Start difference. First operand 142 states and 147 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:34:43,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:34:43,574 INFO L93 Difference]: Finished difference Result 139 states and 144 transitions. [2021-10-28 08:34:43,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 08:34:43,575 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-10-28 08:34:43,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:34:43,579 INFO L225 Difference]: With dead ends: 139 [2021-10-28 08:34:43,580 INFO L226 Difference]: Without dead ends: 139 [2021-10-28 08:34:43,580 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:34:43,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-10-28 08:34:43,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2021-10-28 08:34:43,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 76 states have (on average 1.8026315789473684) internal successors, (137), 131 states have internal predecessors, (137), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 08:34:43,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 144 transitions. [2021-10-28 08:34:43,601 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 144 transitions. Word has length 10 [2021-10-28 08:34:43,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:34:43,602 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 144 transitions. [2021-10-28 08:34:43,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:34:43,602 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 144 transitions. [2021-10-28 08:34:43,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-28 08:34:43,603 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:34:43,603 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:34:43,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 08:34:43,603 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting dll_circular_createErr10REQUIRES_VIOLATION === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-28 08:34:43,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:34:43,604 INFO L85 PathProgramCache]: Analyzing trace with hash 589419475, now seen corresponding path program 1 times [2021-10-28 08:34:43,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:34:43,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943514675] [2021-10-28 08:34:43,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:34:43,605 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:34:43,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:34:43,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:34:43,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:34:43,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:34:43,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:34:43,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943514675] [2021-10-28 08:34:43,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943514675] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:34:43,762 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:34:43,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 08:34:43,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325895728] [2021-10-28 08:34:43,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 08:34:43,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:34:43,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 08:34:43,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 08:34:43,767 INFO L87 Difference]: Start difference. First operand 139 states and 144 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:34:44,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:34:44,108 INFO L93 Difference]: Finished difference Result 149 states and 155 transitions. [2021-10-28 08:34:44,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 08:34:44,112 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-10-28 08:34:44,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:34:44,114 INFO L225 Difference]: With dead ends: 149 [2021-10-28 08:34:44,114 INFO L226 Difference]: Without dead ends: 149 [2021-10-28 08:34:44,115 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 08:34:44,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-10-28 08:34:44,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 145. [2021-10-28 08:34:44,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 82 states have (on average 1.8048780487804879) internal successors, (148), 137 states have internal predecessors, (148), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 08:34:44,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 155 transitions. [2021-10-28 08:34:44,135 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 155 transitions. Word has length 15 [2021-10-28 08:34:44,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:34:44,136 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 155 transitions. [2021-10-28 08:34:44,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:34:44,136 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 155 transitions. [2021-10-28 08:34:44,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-28 08:34:44,137 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:34:44,137 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:34:44,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-28 08:34:44,137 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting dll_circular_createErr11REQUIRES_VIOLATION === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-28 08:34:44,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:34:44,138 INFO L85 PathProgramCache]: Analyzing trace with hash 589419476, now seen corresponding path program 1 times [2021-10-28 08:34:44,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:34:44,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516203069] [2021-10-28 08:34:44,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:34:44,138 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:34:44,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:34:44,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:34:44,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:34:44,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:34:44,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:34:44,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516203069] [2021-10-28 08:34:44,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516203069] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:34:44,241 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:34:44,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 08:34:44,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293485098] [2021-10-28 08:34:44,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 08:34:44,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:34:44,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 08:34:44,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 08:34:44,243 INFO L87 Difference]: Start difference. First operand 145 states and 155 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:34:44,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:34:44,496 INFO L93 Difference]: Finished difference Result 147 states and 152 transitions. [2021-10-28 08:34:44,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 08:34:44,497 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-10-28 08:34:44,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:34:44,499 INFO L225 Difference]: With dead ends: 147 [2021-10-28 08:34:44,499 INFO L226 Difference]: Without dead ends: 147 [2021-10-28 08:34:44,499 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-28 08:34:44,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-10-28 08:34:44,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 143. [2021-10-28 08:34:44,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 80 states have (on average 1.8) internal successors, (144), 135 states have internal predecessors, (144), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 08:34:44,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 151 transitions. [2021-10-28 08:34:44,509 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 151 transitions. Word has length 15 [2021-10-28 08:34:44,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:34:44,509 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 151 transitions. [2021-10-28 08:34:44,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:34:44,510 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 151 transitions. [2021-10-28 08:34:44,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-28 08:34:44,511 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:34:44,511 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:34:44,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-28 08:34:44,512 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting dll_circular_createErr4REQUIRES_VIOLATION === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-28 08:34:44,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:34:44,512 INFO L85 PathProgramCache]: Analyzing trace with hash 589421012, now seen corresponding path program 1 times [2021-10-28 08:34:44,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:34:44,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376834036] [2021-10-28 08:34:44,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:34:44,513 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:34:44,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:34:44,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:34:44,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:34:44,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:34:44,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:34:44,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376834036] [2021-10-28 08:34:44,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376834036] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:34:44,592 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:34:44,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 08:34:44,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211985559] [2021-10-28 08:34:44,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 08:34:44,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:34:44,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 08:34:44,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:34:44,594 INFO L87 Difference]: Start difference. First operand 143 states and 151 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:34:44,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:34:44,779 INFO L93 Difference]: Finished difference Result 142 states and 149 transitions. [2021-10-28 08:34:44,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 08:34:44,780 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-10-28 08:34:44,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:34:44,781 INFO L225 Difference]: With dead ends: 142 [2021-10-28 08:34:44,781 INFO L226 Difference]: Without dead ends: 142 [2021-10-28 08:34:44,781 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:34:44,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-10-28 08:34:44,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-10-28 08:34:44,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 80 states have (on average 1.775) internal successors, (142), 134 states have internal predecessors, (142), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 08:34:44,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 149 transitions. [2021-10-28 08:34:44,785 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 149 transitions. Word has length 15 [2021-10-28 08:34:44,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:34:44,785 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 149 transitions. [2021-10-28 08:34:44,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:34:44,785 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 149 transitions. [2021-10-28 08:34:44,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-28 08:34:44,786 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:34:44,786 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:34:44,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-28 08:34:44,786 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting dll_circular_createErr5REQUIRES_VIOLATION === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-28 08:34:44,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:34:44,787 INFO L85 PathProgramCache]: Analyzing trace with hash 589421013, now seen corresponding path program 1 times [2021-10-28 08:34:44,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:34:44,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252398904] [2021-10-28 08:34:44,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:34:44,787 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:34:44,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:34:44,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:34:44,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:34:44,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:34:44,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:34:44,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252398904] [2021-10-28 08:34:44,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252398904] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:34:44,871 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:34:44,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 08:34:44,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229227896] [2021-10-28 08:34:44,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 08:34:44,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:34:44,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 08:34:44,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:34:44,873 INFO L87 Difference]: Start difference. First operand 142 states and 149 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:34:45,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:34:45,041 INFO L93 Difference]: Finished difference Result 141 states and 147 transitions. [2021-10-28 08:34:45,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 08:34:45,044 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-10-28 08:34:45,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:34:45,045 INFO L225 Difference]: With dead ends: 141 [2021-10-28 08:34:45,045 INFO L226 Difference]: Without dead ends: 141 [2021-10-28 08:34:45,045 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:34:45,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-10-28 08:34:45,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2021-10-28 08:34:45,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 80 states have (on average 1.75) internal successors, (140), 133 states have internal predecessors, (140), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 08:34:45,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 147 transitions. [2021-10-28 08:34:45,049 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 147 transitions. Word has length 15 [2021-10-28 08:34:45,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:34:45,049 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 147 transitions. [2021-10-28 08:34:45,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:34:45,050 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 147 transitions. [2021-10-28 08:34:45,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-28 08:34:45,050 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:34:45,050 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:34:45,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-28 08:34:45,051 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting dll_circular_createErr7REQUIRES_VIOLATION === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-28 08:34:45,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:34:45,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1092182321, now seen corresponding path program 1 times [2021-10-28 08:34:45,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:34:45,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619138622] [2021-10-28 08:34:45,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:34:45,052 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:34:45,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:34:45,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:34:45,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:34:45,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:34:45,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:34:45,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619138622] [2021-10-28 08:34:45,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619138622] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:34:45,146 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:34:45,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 08:34:45,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785777440] [2021-10-28 08:34:45,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 08:34:45,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:34:45,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 08:34:45,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 08:34:45,149 INFO L87 Difference]: Start difference. First operand 141 states and 147 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:34:45,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:34:45,354 INFO L93 Difference]: Finished difference Result 142 states and 147 transitions. [2021-10-28 08:34:45,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 08:34:45,355 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-10-28 08:34:45,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:34:45,356 INFO L225 Difference]: With dead ends: 142 [2021-10-28 08:34:45,356 INFO L226 Difference]: Without dead ends: 142 [2021-10-28 08:34:45,356 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 08:34:45,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-10-28 08:34:45,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2021-10-28 08:34:45,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 80 states have (on average 1.7375) internal successors, (139), 133 states have internal predecessors, (139), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 08:34:45,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 146 transitions. [2021-10-28 08:34:45,360 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 146 transitions. Word has length 16 [2021-10-28 08:34:45,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:34:45,360 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 146 transitions. [2021-10-28 08:34:45,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:34:45,361 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 146 transitions. [2021-10-28 08:34:45,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-28 08:34:45,361 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:34:45,361 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:34:45,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-28 08:34:45,362 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting dll_circular_createErr10REQUIRES_VIOLATION === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-28 08:34:45,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:34:45,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1717860195, now seen corresponding path program 1 times [2021-10-28 08:34:45,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:34:45,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445330773] [2021-10-28 08:34:45,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:34:45,363 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:34:45,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:34:45,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:34:45,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:34:45,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:34:45,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:34:45,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445330773] [2021-10-28 08:34:45,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445330773] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:34:45,404 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:34:45,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 08:34:45,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62203496] [2021-10-28 08:34:45,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 08:34:45,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:34:45,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 08:34:45,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 08:34:45,405 INFO L87 Difference]: Start difference. First operand 141 states and 146 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:34:45,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:34:45,610 INFO L93 Difference]: Finished difference Result 139 states and 144 transitions. [2021-10-28 08:34:45,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 08:34:45,611 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-10-28 08:34:45,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:34:45,612 INFO L225 Difference]: With dead ends: 139 [2021-10-28 08:34:45,612 INFO L226 Difference]: Without dead ends: 139 [2021-10-28 08:34:45,613 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 08:34:45,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-10-28 08:34:45,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2021-10-28 08:34:45,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 80 states have (on average 1.7125) internal successors, (137), 131 states have internal predecessors, (137), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 08:34:45,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 144 transitions. [2021-10-28 08:34:45,617 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 144 transitions. Word has length 20 [2021-10-28 08:34:45,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:34:45,617 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 144 transitions. [2021-10-28 08:34:45,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:34:45,618 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 144 transitions. [2021-10-28 08:34:45,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-28 08:34:45,618 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:34:45,619 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:34:45,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-28 08:34:45,619 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting dll_circular_createErr11REQUIRES_VIOLATION === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-28 08:34:45,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:34:45,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1717860196, now seen corresponding path program 1 times [2021-10-28 08:34:45,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:34:45,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56210286] [2021-10-28 08:34:45,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:34:45,620 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:34:45,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:34:45,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:34:45,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:34:45,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:34:45,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:34:45,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56210286] [2021-10-28 08:34:45,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56210286] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:34:45,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320497325] [2021-10-28 08:34:45,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:34:45,676 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:34:45,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:34:45,678 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:34:45,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 08:34:45,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:34:45,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 08:34:45,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:34:45,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:34:45,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320497325] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:34:45,949 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:34:45,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-10-28 08:34:45,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932368008] [2021-10-28 08:34:45,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 08:34:45,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:34:45,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 08:34:45,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-28 08:34:45,952 INFO L87 Difference]: Start difference. First operand 139 states and 144 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:34:46,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:34:46,212 INFO L93 Difference]: Finished difference Result 141 states and 146 transitions. [2021-10-28 08:34:46,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 08:34:46,212 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-10-28 08:34:46,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:34:46,213 INFO L225 Difference]: With dead ends: 141 [2021-10-28 08:34:46,214 INFO L226 Difference]: Without dead ends: 141 [2021-10-28 08:34:46,214 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-10-28 08:34:46,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-10-28 08:34:46,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2021-10-28 08:34:46,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 82 states have (on average 1.6951219512195121) internal successors, (139), 133 states have internal predecessors, (139), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 08:34:46,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 146 transitions. [2021-10-28 08:34:46,218 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 146 transitions. Word has length 20 [2021-10-28 08:34:46,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:34:46,220 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 146 transitions. [2021-10-28 08:34:46,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:34:46,221 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 146 transitions. [2021-10-28 08:34:46,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 08:34:46,221 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:34:46,221 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:34:46,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 08:34:46,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-10-28 08:34:46,436 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting dll_circular_createErr7REQUIRES_VIOLATION === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-28 08:34:46,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:34:46,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1714106273, now seen corresponding path program 1 times [2021-10-28 08:34:46,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:34:46,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980530243] [2021-10-28 08:34:46,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:34:46,437 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:34:46,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:34:46,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:34:46,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:34:46,513 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:34:46,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:34:46,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980530243] [2021-10-28 08:34:46,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980530243] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:34:46,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324666797] [2021-10-28 08:34:46,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:34:46,517 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:34:46,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:34:46,527 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:34:46,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 08:34:46,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:34:46,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-28 08:34:46,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:34:46,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 08:34:46,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 08:34:46,859 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-28 08:34:46,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2021-10-28 08:34:46,870 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 08:34:46,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-10-28 08:34:46,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:34:46,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324666797] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:34:46,980 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:34:46,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-10-28 08:34:46,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395447046] [2021-10-28 08:34:46,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 08:34:46,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:34:46,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 08:34:46,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-28 08:34:46,982 INFO L87 Difference]: Start difference. First operand 141 states and 146 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:34:47,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:34:47,278 INFO L93 Difference]: Finished difference Result 139 states and 144 transitions. [2021-10-28 08:34:47,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 08:34:47,279 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-10-28 08:34:47,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:34:47,280 INFO L225 Difference]: With dead ends: 139 [2021-10-28 08:34:47,280 INFO L226 Difference]: Without dead ends: 139 [2021-10-28 08:34:47,281 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-10-28 08:34:47,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-10-28 08:34:47,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2021-10-28 08:34:47,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 82 states have (on average 1.670731707317073) internal successors, (137), 131 states have internal predecessors, (137), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 08:34:47,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 144 transitions. [2021-10-28 08:34:47,285 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 144 transitions. Word has length 21 [2021-10-28 08:34:47,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:34:47,286 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 144 transitions. [2021-10-28 08:34:47,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:34:47,287 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 144 transitions. [2021-10-28 08:34:47,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-28 08:34:47,288 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:34:47,288 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-10-28 08:34:47,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 08:34:47,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-28 08:34:47,508 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting _destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-28 08:34:47,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:34:47,508 INFO L85 PathProgramCache]: Analyzing trace with hash 964765578, now seen corresponding path program 1 times [2021-10-28 08:34:47,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:34:47,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873928712] [2021-10-28 08:34:47,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:34:47,509 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:34:47,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:34:47,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:34:47,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:34:47,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:34:47,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:34:47,702 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-28 08:34:47,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:34:47,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873928712] [2021-10-28 08:34:47,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873928712] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:34:47,703 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:34:47,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-28 08:34:47,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020281327] [2021-10-28 08:34:47,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 08:34:47,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:34:47,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 08:34:47,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-10-28 08:34:47,708 INFO L87 Difference]: Start difference. First operand 139 states and 144 transitions. Second operand has 11 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 08:34:48,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:34:48,196 INFO L93 Difference]: Finished difference Result 136 states and 141 transitions. [2021-10-28 08:34:48,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 08:34:48,197 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2021-10-28 08:34:48,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:34:48,198 INFO L225 Difference]: With dead ends: 136 [2021-10-28 08:34:48,198 INFO L226 Difference]: Without dead ends: 136 [2021-10-28 08:34:48,199 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-10-28 08:34:48,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-10-28 08:34:48,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2021-10-28 08:34:48,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 82 states have (on average 1.6341463414634145) internal successors, (134), 128 states have internal predecessors, (134), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 08:34:48,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 141 transitions. [2021-10-28 08:34:48,202 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 141 transitions. Word has length 32 [2021-10-28 08:34:48,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:34:48,203 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 141 transitions. [2021-10-28 08:34:48,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 08:34:48,203 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 141 transitions. [2021-10-28 08:34:48,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-28 08:34:48,204 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:34:48,204 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-10-28 08:34:48,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-28 08:34:48,204 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-28 08:34:48,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:34:48,206 INFO L85 PathProgramCache]: Analyzing trace with hash 964765579, now seen corresponding path program 1 times [2021-10-28 08:34:48,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:34:48,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101967246] [2021-10-28 08:34:48,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:34:48,207 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:34:48,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:34:48,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:34:48,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:34:48,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:34:48,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:34:48,427 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 08:34:48,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:34:48,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101967246] [2021-10-28 08:34:48,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101967246] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:34:48,428 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:34:48,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-28 08:34:48,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619005837] [2021-10-28 08:34:48,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 08:34:48,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:34:48,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 08:34:48,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-10-28 08:34:48,431 INFO L87 Difference]: Start difference. First operand 136 states and 141 transitions. Second operand has 11 states, 9 states have (on average 2.888888888888889) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 08:34:48,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:34:48,981 INFO L93 Difference]: Finished difference Result 129 states and 134 transitions. [2021-10-28 08:34:48,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 08:34:48,982 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.888888888888889) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2021-10-28 08:34:48,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:34:48,983 INFO L225 Difference]: With dead ends: 129 [2021-10-28 08:34:48,983 INFO L226 Difference]: Without dead ends: 129 [2021-10-28 08:34:48,983 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-10-28 08:34:48,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-10-28 08:34:48,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-10-28 08:34:48,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 82 states have (on average 1.548780487804878) internal successors, (127), 121 states have internal predecessors, (127), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 08:34:48,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 134 transitions. [2021-10-28 08:34:48,987 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 134 transitions. Word has length 32 [2021-10-28 08:34:48,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:34:48,989 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 134 transitions. [2021-10-28 08:34:48,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.888888888888889) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 08:34:48,990 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 134 transitions. [2021-10-28 08:34:48,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-28 08:34:48,999 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:34:49,000 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-10-28 08:34:49,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-28 08:34:49,000 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting _destroy_in_nondeterministic_orderErr19ASSERT_VIOLATIONMEMORY_FREE === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-28 08:34:49,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:34:49,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1105471948, now seen corresponding path program 1 times [2021-10-28 08:34:49,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:34:49,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053148296] [2021-10-28 08:34:49,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:34:49,002 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:34:49,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:34:49,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:34:49,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:34:49,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:34:49,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:34:49,475 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:34:49,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:34:49,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053148296] [2021-10-28 08:34:49,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053148296] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:34:49,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789094036] [2021-10-28 08:34:49,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:34:49,476 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:34:49,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:34:49,477 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:34:49,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 08:34:49,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:34:49,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 47 conjunts are in the unsatisfiable core [2021-10-28 08:34:49,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:34:49,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 08:34:49,736 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-28 08:34:49,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-10-28 08:34:49,895 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-10-28 08:34:49,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2021-10-28 08:34:49,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 08:34:50,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-10-28 08:34:50,257 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-10-28 08:34:50,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 42 [2021-10-28 08:34:50,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 08:34:50,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-28 08:34:50,372 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-28 08:34:50,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 48 [2021-10-28 08:34:51,109 INFO L354 Elim1Store]: treesize reduction 78, result has 3.7 percent of original size [2021-10-28 08:34:51,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 54 treesize of output 35 [2021-10-28 08:34:51,126 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:34:51,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789094036] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:34:51,127 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:34:51,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 34 [2021-10-28 08:34:51,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783960004] [2021-10-28 08:34:51,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-28 08:34:51,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:34:51,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-28 08:34:51,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1098, Unknown=0, NotChecked=0, Total=1190 [2021-10-28 08:34:51,130 INFO L87 Difference]: Start difference. First operand 129 states and 134 transitions. Second operand has 35 states, 32 states have (on average 1.8125) internal successors, (58), 29 states have internal predecessors, (58), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 08:34:53,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:34:53,183 INFO L93 Difference]: Finished difference Result 126 states and 131 transitions. [2021-10-28 08:34:53,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-28 08:34:53,184 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 1.8125) internal successors, (58), 29 states have internal predecessors, (58), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 38 [2021-10-28 08:34:53,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:34:53,185 INFO L225 Difference]: With dead ends: 126 [2021-10-28 08:34:53,185 INFO L226 Difference]: Without dead ends: 126 [2021-10-28 08:34:53,187 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=333, Invalid=2423, Unknown=0, NotChecked=0, Total=2756 [2021-10-28 08:34:53,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-10-28 08:34:53,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2021-10-28 08:34:53,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 82 states have (on average 1.4878048780487805) internal successors, (122), 116 states have internal predecessors, (122), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 08:34:53,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 129 transitions. [2021-10-28 08:34:53,191 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 129 transitions. Word has length 38 [2021-10-28 08:34:53,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:34:53,191 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 129 transitions. [2021-10-28 08:34:53,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 1.8125) internal successors, (58), 29 states have internal predecessors, (58), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 08:34:53,191 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 129 transitions. [2021-10-28 08:34:53,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-28 08:34:53,192 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:34:53,193 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-10-28 08:34:53,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 08:34:53,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:34:53,402 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting _destroy_in_nondeterministic_orderErr34ASSERT_VIOLATIONMEMORY_FREE === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-28 08:34:53,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:34:53,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1105470732, now seen corresponding path program 1 times [2021-10-28 08:34:53,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:34:53,403 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897402983] [2021-10-28 08:34:53,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:34:53,403 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:34:53,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:34:53,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:34:53,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:34:53,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:34:53,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:34:53,711 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 08:34:53,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:34:53,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897402983] [2021-10-28 08:34:53,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897402983] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:34:53,712 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:34:53,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-10-28 08:34:53,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999907065] [2021-10-28 08:34:53,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-28 08:34:53,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:34:53,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-28 08:34:53,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-10-28 08:34:53,714 INFO L87 Difference]: Start difference. First operand 124 states and 129 transitions. Second operand has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 12 states have internal predecessors, (32), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 08:34:54,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:34:54,349 INFO L93 Difference]: Finished difference Result 119 states and 124 transitions. [2021-10-28 08:34:54,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 08:34:54,350 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 12 states have internal predecessors, (32), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 38 [2021-10-28 08:34:54,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:34:54,351 INFO L225 Difference]: With dead ends: 119 [2021-10-28 08:34:54,351 INFO L226 Difference]: Without dead ends: 119 [2021-10-28 08:34:54,352 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-10-28 08:34:54,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-10-28 08:34:54,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2021-10-28 08:34:54,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 82 states have (on average 1.4268292682926829) internal successors, (117), 111 states have internal predecessors, (117), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 08:34:54,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 124 transitions. [2021-10-28 08:34:54,355 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 124 transitions. Word has length 38 [2021-10-28 08:34:54,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:34:54,357 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 124 transitions. [2021-10-28 08:34:54,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 12 states have internal predecessors, (32), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 08:34:54,357 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 124 transitions. [2021-10-28 08:34:54,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-28 08:34:54,360 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:34:54,360 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-10-28 08:34:54,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-28 08:34:54,361 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting _destroy_in_nondeterministic_orderErr5ASSERT_VIOLATIONMEMORY_FREE === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-28 08:34:54,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:34:54,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1105509714, now seen corresponding path program 1 times [2021-10-28 08:34:54,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:34:54,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311677591] [2021-10-28 08:34:54,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:34:54,362 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:34:54,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:34:54,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:34:54,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:34:54,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:34:54,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:34:54,533 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 08:34:54,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:34:54,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311677591] [2021-10-28 08:34:54,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311677591] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:34:54,536 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:34:54,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-28 08:34:54,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301134222] [2021-10-28 08:34:54,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 08:34:54,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:34:54,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 08:34:54,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-10-28 08:34:54,539 INFO L87 Difference]: Start difference. First operand 119 states and 124 transitions. Second operand has 11 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 08:34:54,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:34:54,998 INFO L93 Difference]: Finished difference Result 114 states and 119 transitions. [2021-10-28 08:34:54,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 08:34:54,999 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 38 [2021-10-28 08:34:54,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:34:55,000 INFO L225 Difference]: With dead ends: 114 [2021-10-28 08:34:55,000 INFO L226 Difference]: Without dead ends: 114 [2021-10-28 08:34:55,001 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-10-28 08:34:55,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-10-28 08:34:55,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2021-10-28 08:34:55,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 82 states have (on average 1.3658536585365855) internal successors, (112), 106 states have internal predecessors, (112), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 08:34:55,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 119 transitions. [2021-10-28 08:34:55,004 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 119 transitions. Word has length 38 [2021-10-28 08:34:55,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:34:55,005 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 119 transitions. [2021-10-28 08:34:55,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 08:34:55,005 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 119 transitions. [2021-10-28 08:34:55,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-28 08:34:55,005 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:34:55,006 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-10-28 08:34:55,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-28 08:34:55,006 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting _destroy_in_nondeterministic_orderErr20ASSERT_VIOLATIONMEMORY_FREE === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-28 08:34:55,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:34:55,006 INFO L85 PathProgramCache]: Analyzing trace with hash 90108066, now seen corresponding path program 1 times [2021-10-28 08:34:55,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:34:55,007 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606221607] [2021-10-28 08:34:55,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:34:55,007 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:34:55,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:34:55,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:34:55,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:34:55,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:34:55,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:34:55,505 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:34:55,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:34:55,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606221607] [2021-10-28 08:34:55,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606221607] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:34:55,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108602018] [2021-10-28 08:34:55,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:34:55,506 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:34:55,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:34:55,508 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:34:55,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 08:34:55,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:34:55,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 43 conjunts are in the unsatisfiable core [2021-10-28 08:34:55,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:34:55,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 08:34:55,847 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-10-28 08:34:55,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2021-10-28 08:34:55,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 08:34:55,948 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-28 08:34:55,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2021-10-28 08:34:56,124 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-10-28 08:34:56,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 39 [2021-10-28 08:34:56,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 08:34:56,233 INFO L354 Elim1Store]: treesize reduction 102, result has 14.3 percent of original size [2021-10-28 08:34:56,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 55 treesize of output 55 [2021-10-28 08:34:56,879 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-10-28 08:34:56,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 29 [2021-10-28 08:34:56,898 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:34:56,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108602018] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:34:56,899 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:34:56,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 30 [2021-10-28 08:34:56,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19485481] [2021-10-28 08:34:56,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-28 08:34:56,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:34:56,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-28 08:34:56,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=852, Unknown=0, NotChecked=0, Total=930 [2021-10-28 08:34:56,901 INFO L87 Difference]: Start difference. First operand 114 states and 119 transitions. Second operand has 31 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 25 states have internal predecessors, (51), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 08:34:58,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:34:58,660 INFO L93 Difference]: Finished difference Result 113 states and 118 transitions. [2021-10-28 08:34:58,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-28 08:34:58,660 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 25 states have internal predecessors, (51), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2021-10-28 08:34:58,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:34:58,662 INFO L225 Difference]: With dead ends: 113 [2021-10-28 08:34:58,662 INFO L226 Difference]: Without dead ends: 113 [2021-10-28 08:34:58,663 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=261, Invalid=2091, Unknown=0, NotChecked=0, Total=2352 [2021-10-28 08:34:58,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-10-28 08:34:58,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 109. [2021-10-28 08:34:58,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 82 states have (on average 1.3048780487804879) internal successors, (107), 101 states have internal predecessors, (107), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 08:34:58,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 114 transitions. [2021-10-28 08:34:58,667 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 114 transitions. Word has length 39 [2021-10-28 08:34:58,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:34:58,667 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 114 transitions. [2021-10-28 08:34:58,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 25 states have internal predecessors, (51), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 08:34:58,668 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 114 transitions. [2021-10-28 08:34:58,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-28 08:34:58,668 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:34:58,668 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-10-28 08:34:58,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 08:34:58,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-28 08:34:58,884 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting _destroy_in_nondeterministic_orderErr35ASSERT_VIOLATIONMEMORY_FREE === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-28 08:34:58,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:34:58,885 INFO L85 PathProgramCache]: Analyzing trace with hash 90145800, now seen corresponding path program 1 times [2021-10-28 08:34:58,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:34:58,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471233980] [2021-10-28 08:34:58,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:34:58,885 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:34:58,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:34:59,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:34:59,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:34:59,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:34:59,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:34:59,154 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 08:34:59,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:34:59,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471233980] [2021-10-28 08:34:59,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471233980] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:34:59,155 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:34:59,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-10-28 08:34:59,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132855381] [2021-10-28 08:34:59,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-28 08:34:59,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:34:59,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-28 08:34:59,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-10-28 08:34:59,157 INFO L87 Difference]: Start difference. First operand 109 states and 114 transitions. Second operand has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 08:34:59,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:34:59,812 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2021-10-28 08:34:59,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 08:34:59,813 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 39 [2021-10-28 08:34:59,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:34:59,814 INFO L225 Difference]: With dead ends: 104 [2021-10-28 08:34:59,814 INFO L226 Difference]: Without dead ends: 104 [2021-10-28 08:34:59,815 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-10-28 08:34:59,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-10-28 08:34:59,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2021-10-28 08:34:59,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 82 states have (on average 1.2439024390243902) internal successors, (102), 96 states have internal predecessors, (102), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 08:34:59,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 109 transitions. [2021-10-28 08:34:59,819 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 109 transitions. Word has length 39 [2021-10-28 08:34:59,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:34:59,819 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 109 transitions. [2021-10-28 08:34:59,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 08:34:59,819 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 109 transitions. [2021-10-28 08:34:59,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-28 08:34:59,820 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:34:59,820 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-10-28 08:34:59,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-28 08:34:59,821 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting _destroy_in_nondeterministic_orderErr21ASSERT_VIOLATIONMEMORY_FREE === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-28 08:34:59,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:34:59,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1501617162, now seen corresponding path program 1 times [2021-10-28 08:34:59,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:34:59,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905931409] [2021-10-28 08:34:59,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:34:59,822 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:34:59,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:34:59,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:34:59,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:34:59,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:34:59,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:35:00,130 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:35:00,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:35:00,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905931409] [2021-10-28 08:35:00,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905931409] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:35:00,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396658901] [2021-10-28 08:35:00,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:35:00,132 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:35:00,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:35:00,144 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:35:00,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 08:35:00,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:35:00,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 49 conjunts are in the unsatisfiable core [2021-10-28 08:35:00,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:35:00,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 08:35:00,484 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-10-28 08:35:00,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 33 [2021-10-28 08:35:00,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 08:35:00,630 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-28 08:35:00,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2021-10-28 08:35:00,813 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-10-28 08:35:00,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 39 [2021-10-28 08:35:00,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 08:35:00,922 INFO L354 Elim1Store]: treesize reduction 102, result has 14.3 percent of original size [2021-10-28 08:35:00,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 60 [2021-10-28 08:35:01,620 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-10-28 08:35:01,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 39 [2021-10-28 08:35:01,874 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:35:01,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396658901] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:35:01,875 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:35:01,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 32 [2021-10-28 08:35:01,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578681446] [2021-10-28 08:35:01,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-28 08:35:01,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:35:01,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-28 08:35:01,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2021-10-28 08:35:01,878 INFO L87 Difference]: Start difference. First operand 104 states and 109 transitions. Second operand has 33 states, 30 states have (on average 2.0) internal successors, (60), 27 states have internal predecessors, (60), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 08:35:03,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:35:03,480 INFO L93 Difference]: Finished difference Result 107 states and 112 transitions. [2021-10-28 08:35:03,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-28 08:35:03,491 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 2.0) internal successors, (60), 27 states have internal predecessors, (60), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2021-10-28 08:35:03,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:35:03,492 INFO L225 Difference]: With dead ends: 107 [2021-10-28 08:35:03,492 INFO L226 Difference]: Without dead ends: 107 [2021-10-28 08:35:03,493 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=253, Invalid=2003, Unknown=0, NotChecked=0, Total=2256 [2021-10-28 08:35:03,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-10-28 08:35:03,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 103. [2021-10-28 08:35:03,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 82 states have (on average 1.2317073170731707) internal successors, (101), 95 states have internal predecessors, (101), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 08:35:03,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 108 transitions. [2021-10-28 08:35:03,498 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 108 transitions. Word has length 40 [2021-10-28 08:35:03,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:35:03,498 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 108 transitions. [2021-10-28 08:35:03,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 2.0) internal successors, (60), 27 states have internal predecessors, (60), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 08:35:03,499 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 108 transitions. [2021-10-28 08:35:03,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-28 08:35:03,499 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:35:03,499 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-10-28 08:35:03,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-28 08:35:03,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-28 08:35:03,700 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting _destroy_in_nondeterministic_orderErr36ASSERT_VIOLATIONMEMORY_FREE === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-28 08:35:03,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:35:03,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1500447370, now seen corresponding path program 1 times [2021-10-28 08:35:03,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:35:03,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267330066] [2021-10-28 08:35:03,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:35:03,701 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:35:03,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:35:03,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:35:03,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:35:03,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:35:03,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:35:04,012 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 08:35:04,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:35:04,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267330066] [2021-10-28 08:35:04,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267330066] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:35:04,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:35:04,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-10-28 08:35:04,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879763695] [2021-10-28 08:35:04,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-28 08:35:04,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:35:04,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-28 08:35:04,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-10-28 08:35:04,014 INFO L87 Difference]: Start difference. First operand 103 states and 108 transitions. Second operand has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 08:35:04,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:35:04,484 INFO L93 Difference]: Finished difference Result 102 states and 107 transitions. [2021-10-28 08:35:04,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-28 08:35:04,485 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 40 [2021-10-28 08:35:04,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:35:04,486 INFO L225 Difference]: With dead ends: 102 [2021-10-28 08:35:04,486 INFO L226 Difference]: Without dead ends: 102 [2021-10-28 08:35:04,486 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-10-28 08:35:04,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-10-28 08:35:04,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2021-10-28 08:35:04,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 82 states have (on average 1.2195121951219512) internal successors, (100), 94 states have internal predecessors, (100), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 08:35:04,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 107 transitions. [2021-10-28 08:35:04,490 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 107 transitions. Word has length 40 [2021-10-28 08:35:04,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:35:04,490 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 107 transitions. [2021-10-28 08:35:04,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 08:35:04,491 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 107 transitions. [2021-10-28 08:35:04,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-28 08:35:04,491 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:35:04,492 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-10-28 08:35:04,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-10-28 08:35:04,492 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting _destroy_in_nondeterministic_orderErr15ASSERT_VIOLATIONMEMORY_FREE === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-28 08:35:04,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:35:04,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1505910075, now seen corresponding path program 1 times [2021-10-28 08:35:04,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:35:04,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174743583] [2021-10-28 08:35:04,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:35:04,493 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:35:04,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:35:04,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:35:04,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:35:04,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:35:04,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:35:04,822 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:35:04,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:35:04,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174743583] [2021-10-28 08:35:04,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174743583] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:35:04,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486110292] [2021-10-28 08:35:04,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:35:04,823 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:35:04,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:35:04,828 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:35:04,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-28 08:35:05,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:35:05,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-28 08:35:05,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:35:05,225 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 08:35:05,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 08:35:05,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-28 08:35:05,460 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 08:35:05,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-10-28 08:35:05,775 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-28 08:35:05,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-10-28 08:35:05,833 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:35:05,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486110292] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:35:05,833 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:35:05,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 28 [2021-10-28 08:35:05,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707745551] [2021-10-28 08:35:05,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-28 08:35:05,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:35:05,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-28 08:35:05,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=740, Unknown=0, NotChecked=0, Total=812 [2021-10-28 08:35:05,836 INFO L87 Difference]: Start difference. First operand 102 states and 107 transitions. Second operand has 29 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 23 states have internal predecessors, (55), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 08:35:06,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:35:06,748 INFO L93 Difference]: Finished difference Result 101 states and 106 transitions. [2021-10-28 08:35:06,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 08:35:06,748 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 23 states have internal predecessors, (55), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2021-10-28 08:35:06,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:35:06,749 INFO L225 Difference]: With dead ends: 101 [2021-10-28 08:35:06,749 INFO L226 Difference]: Without dead ends: 101 [2021-10-28 08:35:06,750 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=169, Invalid=1391, Unknown=0, NotChecked=0, Total=1560 [2021-10-28 08:35:06,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-10-28 08:35:06,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-10-28 08:35:06,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 82 states have (on average 1.2073170731707317) internal successors, (99), 93 states have internal predecessors, (99), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 08:35:06,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 106 transitions. [2021-10-28 08:35:06,753 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 106 transitions. Word has length 43 [2021-10-28 08:35:06,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:35:06,753 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 106 transitions. [2021-10-28 08:35:06,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 23 states have internal predecessors, (55), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 08:35:06,753 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 106 transitions. [2021-10-28 08:35:06,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-28 08:35:06,754 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:35:06,754 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-10-28 08:35:06,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-28 08:35:06,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:35:06,956 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting _destroy_in_nondeterministic_orderErr9ASSERT_VIOLATIONMEMORY_FREE === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-28 08:35:06,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:35:06,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1506341051, now seen corresponding path program 1 times [2021-10-28 08:35:06,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:35:06,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957217698] [2021-10-28 08:35:06,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:35:06,957 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:35:06,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:35:07,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:35:07,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:35:07,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:35:07,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:35:07,424 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:35:07,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:35:07,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957217698] [2021-10-28 08:35:07,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957217698] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:35:07,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927289263] [2021-10-28 08:35:07,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:35:07,425 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:35:07,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:35:07,444 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:35:07,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-28 08:35:07,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:35:07,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-28 08:35:07,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:35:07,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 08:35:07,928 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-28 08:35:07,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-10-28 08:35:07,987 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-10-28 08:35:07,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2021-10-28 08:35:08,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 08:35:08,071 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-28 08:35:08,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2021-10-28 08:35:08,232 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-10-28 08:35:08,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 39 [2021-10-28 08:35:08,341 INFO L354 Elim1Store]: treesize reduction 116, result has 20.5 percent of original size [2021-10-28 08:35:08,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 66 [2021-10-28 08:35:11,082 INFO L354 Elim1Store]: treesize reduction 104, result has 21.8 percent of original size [2021-10-28 08:35:11,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 115 treesize of output 71 [2021-10-28 08:35:11,725 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-28 08:35:11,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-10-28 08:35:11,804 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:35:11,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927289263] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:35:11,805 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:35:11,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 34 [2021-10-28 08:35:11,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405103739] [2021-10-28 08:35:11,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-28 08:35:11,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:35:11,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-28 08:35:11,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1111, Unknown=0, NotChecked=0, Total=1190 [2021-10-28 08:35:11,807 INFO L87 Difference]: Start difference. First operand 101 states and 106 transitions. Second operand has 35 states, 32 states have (on average 2.125) internal successors, (68), 29 states have internal predecessors, (68), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 08:35:39,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:35:39,882 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2021-10-28 08:35:39,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-28 08:35:39,882 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 2.125) internal successors, (68), 29 states have internal predecessors, (68), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2021-10-28 08:35:39,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:35:39,883 INFO L225 Difference]: With dead ends: 104 [2021-10-28 08:35:39,883 INFO L226 Difference]: Without dead ends: 104 [2021-10-28 08:35:39,884 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=338, Invalid=2963, Unknown=5, NotChecked=0, Total=3306 [2021-10-28 08:35:39,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-10-28 08:35:39,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2021-10-28 08:35:39,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 82 states have (on average 1.1951219512195121) internal successors, (98), 92 states have internal predecessors, (98), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 08:35:39,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 105 transitions. [2021-10-28 08:35:39,888 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 105 transitions. Word has length 43 [2021-10-28 08:35:39,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:35:39,888 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 105 transitions. [2021-10-28 08:35:39,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 2.125) internal successors, (68), 29 states have internal predecessors, (68), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 08:35:39,888 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 105 transitions. [2021-10-28 08:35:39,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-10-28 08:35:39,889 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:35:39,889 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-10-28 08:35:39,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-28 08:35:40,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-10-28 08:35:40,092 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting _destroy_in_nondeterministic_orderErr30ASSERT_VIOLATIONMEMORY_FREE === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-28 08:35:40,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:35:40,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1240568634, now seen corresponding path program 1 times [2021-10-28 08:35:40,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:35:40,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240252681] [2021-10-28 08:35:40,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:35:40,093 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:35:40,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:35:40,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:35:40,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:35:40,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:35:40,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:35:40,752 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:35:40,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:35:40,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240252681] [2021-10-28 08:35:40,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240252681] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:35:40,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397086936] [2021-10-28 08:35:40,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:35:40,753 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:35:40,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:35:40,754 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:35:40,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-28 08:35:41,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:35:41,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 56 conjunts are in the unsatisfiable core [2021-10-28 08:35:41,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:35:41,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 08:35:41,145 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-28 08:35:41,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-10-28 08:35:41,246 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-10-28 08:35:41,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-10-28 08:35:41,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 08:35:41,328 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-28 08:35:41,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 28 [2021-10-28 08:35:41,500 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-10-28 08:35:41,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 38 [2021-10-28 08:35:41,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 08:35:41,619 INFO L354 Elim1Store]: treesize reduction 102, result has 14.3 percent of original size [2021-10-28 08:35:41,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 59 treesize of output 59 [2021-10-28 08:35:42,396 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-10-28 08:35:42,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 36 [2021-10-28 08:35:42,442 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-28 08:35:42,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-10-28 08:35:42,537 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:35:42,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397086936] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:35:42,537 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:35:42,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 22] total 39 [2021-10-28 08:35:42,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970444343] [2021-10-28 08:35:42,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-10-28 08:35:42,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:35:42,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-10-28 08:35:42,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2021-10-28 08:35:42,539 INFO L87 Difference]: Start difference. First operand 100 states and 105 transitions. Second operand has 40 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 34 states have internal predecessors, (64), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 08:35:44,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:35:44,702 INFO L93 Difference]: Finished difference Result 101 states and 106 transitions. [2021-10-28 08:35:44,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-28 08:35:44,705 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 34 states have internal predecessors, (64), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2021-10-28 08:35:44,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:35:44,706 INFO L225 Difference]: With dead ends: 101 [2021-10-28 08:35:44,706 INFO L226 Difference]: Without dead ends: 101 [2021-10-28 08:35:44,707 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=339, Invalid=3083, Unknown=0, NotChecked=0, Total=3422 [2021-10-28 08:35:44,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-10-28 08:35:44,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 97. [2021-10-28 08:35:44,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 82 states have (on average 1.1585365853658536) internal successors, (95), 89 states have internal predecessors, (95), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 08:35:44,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 102 transitions. [2021-10-28 08:35:44,711 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 102 transitions. Word has length 44 [2021-10-28 08:35:44,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:35:44,712 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 102 transitions. [2021-10-28 08:35:44,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 34 states have internal predecessors, (64), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 08:35:44,712 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 102 transitions. [2021-10-28 08:35:44,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-10-28 08:35:44,713 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:35:44,713 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-10-28 08:35:44,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-28 08:35:44,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-10-28 08:35:44,920 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting _destroy_in_nondeterministic_orderErr24ASSERT_VIOLATIONMEMORY_FREE === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-28 08:35:44,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:35:44,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1240137658, now seen corresponding path program 1 times [2021-10-28 08:35:44,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:35:44,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60655514] [2021-10-28 08:35:44,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:35:44,921 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:35:44,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:35:45,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:35:45,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:35:45,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:35:45,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:35:45,350 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:35:45,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:35:45,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60655514] [2021-10-28 08:35:45,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60655514] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:35:45,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634717678] [2021-10-28 08:35:45,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:35:45,351 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:35:45,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:35:45,351 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:35:45,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-28 08:35:45,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:35:45,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-28 08:35:45,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:35:45,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 08:35:45,804 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-28 08:35:45,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-10-28 08:35:45,876 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-10-28 08:35:45,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2021-10-28 08:35:45,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 08:35:45,936 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-28 08:35:45,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-10-28 08:35:46,035 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-10-28 08:35:46,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 34 [2021-10-28 08:35:46,109 INFO L354 Elim1Store]: treesize reduction 116, result has 20.5 percent of original size [2021-10-28 08:35:46,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 56 [2021-10-28 08:35:48,348 INFO L354 Elim1Store]: treesize reduction 104, result has 21.8 percent of original size [2021-10-28 08:35:48,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 93 treesize of output 61 [2021-10-28 08:35:48,573 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 08:35:48,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 27 [2021-10-28 08:35:48,800 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:35:48,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634717678] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:35:48,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:35:48,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-10-28 08:35:48,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15324894] [2021-10-28 08:35:48,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-10-28 08:35:48,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:35:48,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-10-28 08:35:48,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1454, Unknown=1, NotChecked=0, Total=1560 [2021-10-28 08:35:48,802 INFO L87 Difference]: Start difference. First operand 97 states and 102 transitions. Second operand has 40 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 34 states have internal predecessors, (71), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 08:36:15,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:36:15,826 INFO L93 Difference]: Finished difference Result 100 states and 105 transitions. [2021-10-28 08:36:15,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-28 08:36:15,826 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 34 states have internal predecessors, (71), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2021-10-28 08:36:15,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:36:15,827 INFO L225 Difference]: With dead ends: 100 [2021-10-28 08:36:15,827 INFO L226 Difference]: Without dead ends: 100 [2021-10-28 08:36:15,829 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=399, Invalid=3625, Unknown=8, NotChecked=0, Total=4032 [2021-10-28 08:36:15,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-10-28 08:36:15,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2021-10-28 08:36:15,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 82 states have (on average 1.146341463414634) internal successors, (94), 88 states have internal predecessors, (94), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 08:36:15,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 101 transitions. [2021-10-28 08:36:15,833 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 101 transitions. Word has length 44 [2021-10-28 08:36:15,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:36:15,834 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 101 transitions. [2021-10-28 08:36:15,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 34 states have internal predecessors, (71), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 08:36:15,834 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 101 transitions. [2021-10-28 08:36:15,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-10-28 08:36:15,835 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:36:15,835 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-10-28 08:36:15,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-28 08:36:16,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-28 08:36:16,043 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting _destroy_in_nondeterministic_orderErr45ASSERT_VIOLATIONMEMORY_FREE === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-28 08:36:16,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:36:16,044 INFO L85 PathProgramCache]: Analyzing trace with hash -762542534, now seen corresponding path program 1 times [2021-10-28 08:36:16,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:36:16,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241202125] [2021-10-28 08:36:16,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:36:16,044 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:36:16,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:36:16,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:36:16,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:36:16,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:36:16,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:36:16,695 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:36:16,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:36:16,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241202125] [2021-10-28 08:36:16,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241202125] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:36:16,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082547123] [2021-10-28 08:36:16,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:36:16,695 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:36:16,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:36:16,704 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:36:16,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-28 08:36:17,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:36:17,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 56 conjunts are in the unsatisfiable core [2021-10-28 08:36:17,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:36:17,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 08:36:17,376 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-28 08:36:17,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-10-28 08:36:17,488 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-10-28 08:36:17,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-10-28 08:36:17,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 08:36:17,562 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-28 08:36:17,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 80 [2021-10-28 08:36:17,758 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-10-28 08:36:17,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 43 [2021-10-28 08:36:17,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 08:36:17,853 INFO L354 Elim1Store]: treesize reduction 102, result has 14.3 percent of original size [2021-10-28 08:36:17,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 63 treesize of output 59 [2021-10-28 08:36:18,689 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-10-28 08:36:18,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 36 [2021-10-28 08:36:18,730 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-28 08:36:18,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-10-28 08:36:18,795 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:36:18,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082547123] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:36:18,795 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:36:18,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 22] total 38 [2021-10-28 08:36:18,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119704470] [2021-10-28 08:36:18,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-10-28 08:36:18,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:36:18,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-10-28 08:36:18,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1376, Unknown=0, NotChecked=0, Total=1482 [2021-10-28 08:36:18,797 INFO L87 Difference]: Start difference. First operand 96 states and 101 transitions. Second operand has 39 states, 36 states have (on average 1.75) internal successors, (63), 33 states have internal predecessors, (63), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 08:36:20,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:36:20,930 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2021-10-28 08:36:20,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-28 08:36:20,930 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 36 states have (on average 1.75) internal successors, (63), 33 states have internal predecessors, (63), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2021-10-28 08:36:20,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:36:20,931 INFO L225 Difference]: With dead ends: 99 [2021-10-28 08:36:20,931 INFO L226 Difference]: Without dead ends: 99 [2021-10-28 08:36:20,932 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=325, Invalid=2981, Unknown=0, NotChecked=0, Total=3306 [2021-10-28 08:36:20,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-10-28 08:36:20,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2021-10-28 08:36:20,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 82 states have (on average 1.1341463414634145) internal successors, (93), 87 states have internal predecessors, (93), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 08:36:20,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 100 transitions. [2021-10-28 08:36:20,935 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 100 transitions. Word has length 44 [2021-10-28 08:36:20,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:36:20,936 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 100 transitions. [2021-10-28 08:36:20,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 36 states have (on average 1.75) internal successors, (63), 33 states have internal predecessors, (63), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 08:36:20,936 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 100 transitions. [2021-10-28 08:36:20,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-10-28 08:36:20,937 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:36:20,937 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-10-28 08:36:20,966 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-10-28 08:36:21,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-28 08:36:21,148 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting _destroy_in_nondeterministic_orderErr39ASSERT_VIOLATIONMEMORY_FREE === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-28 08:36:21,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:36:21,148 INFO L85 PathProgramCache]: Analyzing trace with hash -762973510, now seen corresponding path program 1 times [2021-10-28 08:36:21,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:36:21,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295218011] [2021-10-28 08:36:21,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:36:21,149 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:36:21,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:36:21,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:36:21,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:36:21,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:36:21,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:36:21,440 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:36:21,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:36:21,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295218011] [2021-10-28 08:36:21,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295218011] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:36:21,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334617674] [2021-10-28 08:36:21,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:36:21,441 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:36:21,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:36:21,441 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:36:21,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-28 08:36:21,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:36:21,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-28 08:36:21,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:36:21,967 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 08:36:21,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 08:36:22,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-28 08:36:22,144 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 08:36:22,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-10-28 08:36:22,317 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 08:36:22,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 27 [2021-10-28 08:36:22,503 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:36:22,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334617674] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:36:22,503 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:36:22,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 27 [2021-10-28 08:36:22,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809912089] [2021-10-28 08:36:22,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-28 08:36:22,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:36:22,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-28 08:36:22,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-10-28 08:36:22,505 INFO L87 Difference]: Start difference. First operand 95 states and 100 transitions. Second operand has 28 states, 25 states have (on average 2.32) internal successors, (58), 22 states have internal predecessors, (58), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 08:36:23,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:36:23,444 INFO L93 Difference]: Finished difference Result 94 states and 99 transitions. [2021-10-28 08:36:23,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-28 08:36:23,444 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 2.32) internal successors, (58), 22 states have internal predecessors, (58), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2021-10-28 08:36:23,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:36:23,445 INFO L225 Difference]: With dead ends: 94 [2021-10-28 08:36:23,445 INFO L226 Difference]: Without dead ends: 94 [2021-10-28 08:36:23,445 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=174, Invalid=1386, Unknown=0, NotChecked=0, Total=1560 [2021-10-28 08:36:23,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-10-28 08:36:23,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-10-28 08:36:23,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 82 states have (on average 1.1219512195121952) internal successors, (92), 86 states have internal predecessors, (92), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 08:36:23,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 99 transitions. [2021-10-28 08:36:23,449 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 99 transitions. Word has length 44 [2021-10-28 08:36:23,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:36:23,449 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 99 transitions. [2021-10-28 08:36:23,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 2.32) internal successors, (58), 22 states have internal predecessors, (58), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 08:36:23,450 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 99 transitions. [2021-10-28 08:36:23,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-28 08:36:23,450 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:36:23,450 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-10-28 08:36:23,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-28 08:36:23,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-28 08:36:23,651 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting _destroy_in_nondeterministic_orderErr18ASSERT_VIOLATIONMEMORY_FREE === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-28 08:36:23,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:36:23,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1633566043, now seen corresponding path program 1 times [2021-10-28 08:36:23,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:36:23,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650330340] [2021-10-28 08:36:23,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:36:23,652 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:36:23,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:36:23,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:36:23,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:36:23,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:36:23,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:36:24,415 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:36:24,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:36:24,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650330340] [2021-10-28 08:36:24,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650330340] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:36:24,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766866071] [2021-10-28 08:36:24,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:36:24,415 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:36:24,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:36:24,420 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:36:24,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-28 08:36:24,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:36:24,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 49 conjunts are in the unsatisfiable core [2021-10-28 08:36:24,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:36:24,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 08:36:25,018 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-28 08:36:25,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-10-28 08:36:25,115 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-10-28 08:36:25,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-10-28 08:36:25,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 08:36:25,215 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-28 08:36:25,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 80 [2021-10-28 08:36:25,440 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-10-28 08:36:25,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 43 [2021-10-28 08:36:25,563 INFO L354 Elim1Store]: treesize reduction 94, result has 15.3 percent of original size [2021-10-28 08:36:25,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 61 treesize of output 57 [2021-10-28 08:36:26,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 08:36:26,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 08:36:26,315 INFO L354 Elim1Store]: treesize reduction 124, result has 16.8 percent of original size [2021-10-28 08:36:26,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 78 treesize of output 60 [2021-10-28 08:36:27,037 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-28 08:36:27,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2021-10-28 08:36:27,203 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-10-28 08:36:27,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 30 [2021-10-28 08:36:27,352 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:36:27,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766866071] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:36:27,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:36:27,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24] total 43 [2021-10-28 08:36:27,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495867777] [2021-10-28 08:36:27,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-10-28 08:36:27,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:36:27,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-10-28 08:36:27,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1779, Unknown=0, NotChecked=0, Total=1892 [2021-10-28 08:36:27,355 INFO L87 Difference]: Start difference. First operand 94 states and 99 transitions. Second operand has 44 states, 41 states have (on average 1.7560975609756098) internal successors, (72), 38 states have internal predecessors, (72), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 08:36:30,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:36:30,933 INFO L93 Difference]: Finished difference Result 96 states and 101 transitions. [2021-10-28 08:36:30,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-28 08:36:30,934 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 41 states have (on average 1.7560975609756098) internal successors, (72), 38 states have internal predecessors, (72), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 46 [2021-10-28 08:36:30,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:36:30,935 INFO L225 Difference]: With dead ends: 96 [2021-10-28 08:36:30,935 INFO L226 Difference]: Without dead ends: 96 [2021-10-28 08:36:30,937 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 726 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=375, Invalid=4047, Unknown=0, NotChecked=0, Total=4422 [2021-10-28 08:36:30,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-10-28 08:36:30,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2021-10-28 08:36:30,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 82 states have (on average 1.0975609756097562) internal successors, (90), 84 states have internal predecessors, (90), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 08:36:30,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 97 transitions. [2021-10-28 08:36:30,940 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 97 transitions. Word has length 46 [2021-10-28 08:36:30,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:36:30,941 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 97 transitions. [2021-10-28 08:36:30,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 41 states have (on average 1.7560975609756098) internal successors, (72), 38 states have internal predecessors, (72), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 08:36:30,941 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 97 transitions. [2021-10-28 08:36:30,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-28 08:36:30,942 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:36:30,942 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-10-28 08:36:30,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-28 08:36:31,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:36:31,144 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting _destroy_in_nondeterministic_orderErr33ASSERT_VIOLATIONMEMORY_FREE === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-28 08:36:31,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:36:31,144 INFO L85 PathProgramCache]: Analyzing trace with hash -413294311, now seen corresponding path program 1 times [2021-10-28 08:36:31,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:36:31,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953459933] [2021-10-28 08:36:31,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:36:31,145 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:36:31,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:36:31,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:36:31,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:36:31,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:36:31,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:36:31,812 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:36:31,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:36:31,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953459933] [2021-10-28 08:36:31,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953459933] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:36:31,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704704761] [2021-10-28 08:36:31,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:36:31,812 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:36:31,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:36:31,813 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:36:31,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-28 08:36:32,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:36:32,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 45 conjunts are in the unsatisfiable core [2021-10-28 08:36:32,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:36:32,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 08:36:32,482 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-28 08:36:32,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-10-28 08:36:32,576 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-10-28 08:36:32,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2021-10-28 08:36:32,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 08:36:32,675 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-28 08:36:32,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-10-28 08:36:32,841 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-10-28 08:36:32,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 34 [2021-10-28 08:36:32,949 INFO L354 Elim1Store]: treesize reduction 94, result has 15.3 percent of original size [2021-10-28 08:36:32,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 44 treesize of output 48 [2021-10-28 08:36:33,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 08:36:33,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 08:36:33,620 INFO L354 Elim1Store]: treesize reduction 124, result has 16.8 percent of original size [2021-10-28 08:36:33,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 12 case distinctions, treesize of input 57 treesize of output 51 [2021-10-28 08:36:34,066 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 08:36:34,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 51 [2021-10-28 08:36:34,519 INFO L354 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2021-10-28 08:36:34,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 71 [2021-10-28 08:36:35,270 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:36:35,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704704761] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:36:35,271 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:36:35,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 44 [2021-10-28 08:36:35,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544824034] [2021-10-28 08:36:35,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-10-28 08:36:35,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:36:35,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-10-28 08:36:35,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1848, Unknown=0, NotChecked=0, Total=1980 [2021-10-28 08:36:35,274 INFO L87 Difference]: Start difference. First operand 92 states and 97 transitions. Second operand has 45 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 39 states have internal predecessors, (77), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 08:36:38,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:36:38,354 INFO L93 Difference]: Finished difference Result 94 states and 99 transitions. [2021-10-28 08:36:38,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-28 08:36:38,354 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 39 states have internal predecessors, (77), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 47 [2021-10-28 08:36:38,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:36:38,355 INFO L225 Difference]: With dead ends: 94 [2021-10-28 08:36:38,355 INFO L226 Difference]: Without dead ends: 94 [2021-10-28 08:36:38,357 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=442, Invalid=4388, Unknown=0, NotChecked=0, Total=4830 [2021-10-28 08:36:38,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-10-28 08:36:38,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2021-10-28 08:36:38,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 82 states have (on average 1.0731707317073171) internal successors, (88), 82 states have internal predecessors, (88), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 08:36:38,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2021-10-28 08:36:38,361 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 47 [2021-10-28 08:36:38,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:36:38,361 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2021-10-28 08:36:38,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 39 states have internal predecessors, (77), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 08:36:38,361 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2021-10-28 08:36:38,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-10-28 08:36:38,362 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:36:38,362 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-10-28 08:36:38,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-28 08:36:38,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-28 08:36:38,580 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ENSURES_VIOLATIONMEMORY_LEAK === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-28 08:36:38,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:36:38,581 INFO L85 PathProgramCache]: Analyzing trace with hash 491836438, now seen corresponding path program 1 times [2021-10-28 08:36:38,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:36:38,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606721883] [2021-10-28 08:36:38,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:36:38,581 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:36:38,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:36:38,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:36:38,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:36:38,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:36:38,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:36:39,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-10-28 08:36:39,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:36:39,925 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:36:39,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:36:39,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606721883] [2021-10-28 08:36:39,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606721883] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:36:39,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594863589] [2021-10-28 08:36:39,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:36:39,926 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:36:39,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:36:39,932 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:36:39,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-28 08:36:40,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:36:40,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 50 conjunts are in the unsatisfiable core [2021-10-28 08:36:40,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:36:40,661 INFO L354 Elim1Store]: treesize reduction 34, result has 30.6 percent of original size [2021-10-28 08:36:40,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 26 [2021-10-28 08:36:40,849 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-10-28 08:36:40,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2021-10-28 08:36:40,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 08:36:41,093 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-28 08:36:41,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 38 [2021-10-28 08:36:41,349 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-10-28 08:36:41,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 48 [2021-10-28 08:36:41,475 INFO L354 Elim1Store]: treesize reduction 94, result has 15.3 percent of original size [2021-10-28 08:36:41,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 80 treesize of output 72 [2021-10-28 08:36:41,999 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-10-28 08:36:41,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 80 [2021-10-28 08:36:42,003 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-10-28 08:36:42,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 59 [2021-10-28 08:36:46,924 INFO L354 Elim1Store]: treesize reduction 348, result has 32.9 percent of original size [2021-10-28 08:36:46,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 14 new quantified variables, introduced 45 case distinctions, treesize of input 174 treesize of output 262 [2021-10-28 08:36:46,961 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-10-28 08:36:46,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 232 treesize of output 229 [2021-10-28 08:36:52,213 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:36:52,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594863589] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:36:52,213 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:36:52,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25] total 50 [2021-10-28 08:36:52,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245773516] [2021-10-28 08:36:52,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-10-28 08:36:52,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:36:52,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-10-28 08:36:52,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2411, Unknown=0, NotChecked=0, Total=2550 [2021-10-28 08:36:52,215 INFO L87 Difference]: Start difference. First operand 90 states and 95 transitions. Second operand has 51 states, 48 states have (on average 1.7291666666666667) internal successors, (83), 46 states have internal predecessors, (83), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-28 08:37:08,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:37:08,828 INFO L93 Difference]: Finished difference Result 160 states and 172 transitions. [2021-10-28 08:37:08,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-10-28 08:37:08,828 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 48 states have (on average 1.7291666666666667) internal successors, (83), 46 states have internal predecessors, (83), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 50 [2021-10-28 08:37:08,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:37:08,831 INFO L225 Difference]: With dead ends: 160 [2021-10-28 08:37:08,831 INFO L226 Difference]: Without dead ends: 148 [2021-10-28 08:37:08,834 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2092 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=566, Invalid=8363, Unknown=1, NotChecked=0, Total=8930 [2021-10-28 08:37:08,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-10-28 08:37:08,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 124. [2021-10-28 08:37:08,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 113 states have (on average 1.0884955752212389) internal successors, (123), 114 states have internal predecessors, (123), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-10-28 08:37:08,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 134 transitions. [2021-10-28 08:37:08,843 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 134 transitions. Word has length 50 [2021-10-28 08:37:08,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:37:08,843 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 134 transitions. [2021-10-28 08:37:08,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 48 states have (on average 1.7291666666666667) internal successors, (83), 46 states have internal predecessors, (83), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-28 08:37:08,844 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 134 transitions. [2021-10-28 08:37:08,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-10-28 08:37:08,845 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:37:08,845 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-10-28 08:37:08,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-28 08:37:09,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-28 08:37:09,060 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ENSURES_VIOLATIONMEMORY_LEAK === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-28 08:37:09,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:37:09,060 INFO L85 PathProgramCache]: Analyzing trace with hash -713295800, now seen corresponding path program 1 times [2021-10-28 08:37:09,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:37:09,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825004052] [2021-10-28 08:37:09,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:37:09,061 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:37:09,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:37:09,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:37:09,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:37:09,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:37:09,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:37:09,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-10-28 08:37:09,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:37:10,471 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:37:10,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:37:10,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825004052] [2021-10-28 08:37:10,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825004052] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:37:10,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479236507] [2021-10-28 08:37:10,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:37:10,472 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:37:10,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:37:10,479 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:37:10,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-28 08:37:11,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:37:11,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 50 conjunts are in the unsatisfiable core [2021-10-28 08:37:11,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:37:11,294 INFO L354 Elim1Store]: treesize reduction 34, result has 30.6 percent of original size [2021-10-28 08:37:11,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 26 [2021-10-28 08:37:11,472 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-10-28 08:37:11,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2021-10-28 08:37:11,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 08:37:11,694 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-28 08:37:11,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 38 [2021-10-28 08:37:11,962 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-10-28 08:37:11,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 48 [2021-10-28 08:37:12,096 INFO L354 Elim1Store]: treesize reduction 94, result has 15.3 percent of original size [2021-10-28 08:37:12,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 80 treesize of output 72 [2021-10-28 08:37:12,637 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-10-28 08:37:12,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 80 [2021-10-28 08:37:12,642 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-10-28 08:37:12,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 59 [2021-10-28 08:37:18,603 INFO L354 Elim1Store]: treesize reduction 350, result has 32.6 percent of original size [2021-10-28 08:37:18,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 14 new quantified variables, introduced 45 case distinctions, treesize of input 174 treesize of output 260 [2021-10-28 08:37:18,640 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-10-28 08:37:18,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 230 treesize of output 227 [2021-10-28 08:37:19,364 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:37:19,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479236507] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:37:19,365 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:37:19,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25] total 50 [2021-10-28 08:37:19,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825602764] [2021-10-28 08:37:19,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-10-28 08:37:19,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:37:19,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-10-28 08:37:19,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=2414, Unknown=0, NotChecked=0, Total=2550 [2021-10-28 08:37:19,366 INFO L87 Difference]: Start difference. First operand 124 states and 134 transitions. Second operand has 51 states, 48 states have (on average 1.7291666666666667) internal successors, (83), 46 states have internal predecessors, (83), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-28 08:37:37,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:37:37,207 INFO L93 Difference]: Finished difference Result 159 states and 170 transitions. [2021-10-28 08:37:37,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-10-28 08:37:37,208 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 48 states have (on average 1.7291666666666667) internal successors, (83), 46 states have internal predecessors, (83), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 50 [2021-10-28 08:37:37,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:37:37,209 INFO L225 Difference]: With dead ends: 159 [2021-10-28 08:37:37,209 INFO L226 Difference]: Without dead ends: 143 [2021-10-28 08:37:37,210 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2113 ImplicationChecksByTransitivity, 21.2s TimeCoverageRelationStatistics Valid=575, Invalid=8736, Unknown=1, NotChecked=0, Total=9312 [2021-10-28 08:37:37,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-10-28 08:37:37,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 120. [2021-10-28 08:37:37,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 109 states have (on average 1.0825688073394495) internal successors, (118), 110 states have internal predecessors, (118), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-10-28 08:37:37,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 129 transitions. [2021-10-28 08:37:37,215 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 129 transitions. Word has length 50 [2021-10-28 08:37:37,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:37:37,215 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 129 transitions. [2021-10-28 08:37:37,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 48 states have (on average 1.7291666666666667) internal successors, (83), 46 states have internal predecessors, (83), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-28 08:37:37,221 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 129 transitions. [2021-10-28 08:37:37,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-28 08:37:37,222 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:37:37,222 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-10-28 08:37:37,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-28 08:37:37,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-28 08:37:37,434 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr0ENSURES_VIOLATIONMEMORY_LEAK === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-28 08:37:37,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:37:37,434 INFO L85 PathProgramCache]: Analyzing trace with hash -816818038, now seen corresponding path program 1 times [2021-10-28 08:37:37,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:37:37,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021384374] [2021-10-28 08:37:37,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:37:37,435 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:37:37,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:37:37,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:37:37,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:37:37,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:37:37,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:37:38,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-10-28 08:37:38,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:37:39,104 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:37:39,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:37:39,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021384374] [2021-10-28 08:37:39,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021384374] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:37:39,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381941072] [2021-10-28 08:37:39,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:37:39,105 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:37:39,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:37:39,105 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:37:39,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-28 08:37:39,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:37:39,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 56 conjunts are in the unsatisfiable core [2021-10-28 08:37:39,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:37:40,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 08:37:40,497 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-28 08:37:40,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 51 [2021-10-28 08:37:40,786 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-10-28 08:37:40,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 61 [2021-10-28 08:37:40,912 INFO L354 Elim1Store]: treesize reduction 94, result has 15.3 percent of original size [2021-10-28 08:37:40,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 84 treesize of output 80 [2021-10-28 08:37:41,396 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-10-28 08:37:41,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 70 [2021-10-28 08:37:43,769 INFO L354 Elim1Store]: treesize reduction 348, result has 32.9 percent of original size [2021-10-28 08:37:43,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 14 new quantified variables, introduced 45 case distinctions, treesize of input 227 treesize of output 287 [2021-10-28 08:37:45,581 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:37:45,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381941072] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:37:45,582 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:37:45,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 53 [2021-10-28 08:37:45,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587834879] [2021-10-28 08:37:45,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-10-28 08:37:45,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:37:45,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-10-28 08:37:45,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=2709, Unknown=0, NotChecked=0, Total=2862 [2021-10-28 08:37:45,583 INFO L87 Difference]: Start difference. First operand 120 states and 129 transitions. Second operand has 54 states, 51 states have (on average 1.6862745098039216) internal successors, (86), 49 states have internal predecessors, (86), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-28 08:37:57,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:37:57,659 INFO L93 Difference]: Finished difference Result 156 states and 168 transitions. [2021-10-28 08:37:57,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-28 08:37:57,661 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 51 states have (on average 1.6862745098039216) internal successors, (86), 49 states have internal predecessors, (86), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 51 [2021-10-28 08:37:57,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:37:57,661 INFO L225 Difference]: With dead ends: 156 [2021-10-28 08:37:57,661 INFO L226 Difference]: Without dead ends: 146 [2021-10-28 08:37:57,662 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1566 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=414, Invalid=6558, Unknown=0, NotChecked=0, Total=6972 [2021-10-28 08:37:57,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-10-28 08:37:57,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 140. [2021-10-28 08:37:57,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 126 states have (on average 1.0793650793650793) internal successors, (136), 128 states have internal predecessors, (136), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-10-28 08:37:57,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 152 transitions. [2021-10-28 08:37:57,669 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 152 transitions. Word has length 51 [2021-10-28 08:37:57,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:37:57,669 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 152 transitions. [2021-10-28 08:37:57,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 51 states have (on average 1.6862745098039216) internal successors, (86), 49 states have internal predecessors, (86), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-28 08:37:57,670 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 152 transitions. [2021-10-28 08:37:57,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-28 08:37:57,670 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:37:57,671 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-10-28 08:37:57,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-28 08:37:57,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:37:57,888 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr0ENSURES_VIOLATIONMEMORY_LEAK === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-28 08:37:57,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:37:57,888 INFO L85 PathProgramCache]: Analyzing trace with hash -2021950276, now seen corresponding path program 1 times [2021-10-28 08:37:57,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:37:57,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982217226] [2021-10-28 08:37:57,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:37:57,889 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:37:57,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:37:58,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:37:58,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:37:58,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:37:58,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:37:58,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-10-28 08:37:58,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:37:59,705 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:37:59,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:37:59,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982217226] [2021-10-28 08:37:59,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982217226] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:37:59,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43549423] [2021-10-28 08:37:59,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:37:59,706 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:37:59,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:37:59,706 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:37:59,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-28 08:38:00,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:38:00,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 54 conjunts are in the unsatisfiable core [2021-10-28 08:38:00,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:38:00,745 INFO L354 Elim1Store]: treesize reduction 34, result has 30.6 percent of original size [2021-10-28 08:38:00,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 26 [2021-10-28 08:38:00,973 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-10-28 08:38:00,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2021-10-28 08:38:01,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 08:38:01,244 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-28 08:38:01,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 38 [2021-10-28 08:38:01,485 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-10-28 08:38:01,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 48 [2021-10-28 08:38:01,615 INFO L354 Elim1Store]: treesize reduction 94, result has 15.3 percent of original size [2021-10-28 08:38:01,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 80 treesize of output 72 [2021-10-28 08:38:02,137 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-10-28 08:38:02,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 80 [2021-10-28 08:38:02,142 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-10-28 08:38:02,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 59 [2021-10-28 08:38:07,710 INFO L354 Elim1Store]: treesize reduction 348, result has 32.9 percent of original size [2021-10-28 08:38:07,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 14 new quantified variables, introduced 45 case distinctions, treesize of input 174 treesize of output 262 [2021-10-28 08:38:07,750 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-10-28 08:38:07,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 232 treesize of output 229 [2021-10-28 08:38:10,576 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:38:10,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43549423] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:38:10,577 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:38:10,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 51 [2021-10-28 08:38:10,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428132113] [2021-10-28 08:38:10,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-10-28 08:38:10,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:38:10,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-10-28 08:38:10,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2518, Unknown=0, NotChecked=0, Total=2652 [2021-10-28 08:38:10,578 INFO L87 Difference]: Start difference. First operand 140 states and 152 transitions. Second operand has 52 states, 49 states have (on average 1.7142857142857142) internal successors, (84), 47 states have internal predecessors, (84), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-28 08:38:27,223 WARN L207 SmtUtils]: Spent 5.72 s on a formula simplification. DAG size of input: 110 DAG size of output: 66 [2021-10-28 08:38:37,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:38:37,816 INFO L93 Difference]: Finished difference Result 172 states and 185 transitions. [2021-10-28 08:38:37,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-10-28 08:38:37,817 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 49 states have (on average 1.7142857142857142) internal successors, (84), 47 states have internal predecessors, (84), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 51 [2021-10-28 08:38:37,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:38:37,818 INFO L225 Difference]: With dead ends: 172 [2021-10-28 08:38:37,818 INFO L226 Difference]: Without dead ends: 156 [2021-10-28 08:38:37,819 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2106 ImplicationChecksByTransitivity, 30.2s TimeCoverageRelationStatistics Valid=562, Invalid=9140, Unknown=0, NotChecked=0, Total=9702 [2021-10-28 08:38:37,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-10-28 08:38:37,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 141. [2021-10-28 08:38:37,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 127 states have (on average 1.078740157480315) internal successors, (137), 129 states have internal predecessors, (137), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-10-28 08:38:37,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 153 transitions. [2021-10-28 08:38:37,825 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 153 transitions. Word has length 51 [2021-10-28 08:38:37,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:38:37,825 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 153 transitions. [2021-10-28 08:38:37,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 49 states have (on average 1.7142857142857142) internal successors, (84), 47 states have internal predecessors, (84), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-28 08:38:37,826 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 153 transitions. [2021-10-28 08:38:37,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-28 08:38:37,826 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:38:37,827 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-10-28 08:38:37,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-28 08:38:38,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-10-28 08:38:38,040 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr0ENSURES_VIOLATIONMEMORY_LEAK === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-28 08:38:38,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:38:38,040 INFO L85 PathProgramCache]: Analyzing trace with hash 539653616, now seen corresponding path program 1 times [2021-10-28 08:38:38,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:38:38,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036315934] [2021-10-28 08:38:38,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:38:38,041 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:38:38,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:38:38,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:38:38,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:38:38,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:38:38,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:38:38,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-10-28 08:38:38,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:38:39,751 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:38:39,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:38:39,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036315934] [2021-10-28 08:38:39,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036315934] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:38:39,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117679282] [2021-10-28 08:38:39,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:38:39,752 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:38:39,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:38:39,753 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:38:39,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-28 08:38:40,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:38:40,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 54 conjunts are in the unsatisfiable core [2021-10-28 08:38:40,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:38:40,924 INFO L354 Elim1Store]: treesize reduction 34, result has 30.6 percent of original size [2021-10-28 08:38:40,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 26 [2021-10-28 08:38:41,153 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-10-28 08:38:41,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2021-10-28 08:38:41,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 08:38:41,361 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-28 08:38:41,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 38 [2021-10-28 08:38:41,607 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-10-28 08:38:41,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 48 [2021-10-28 08:38:41,734 INFO L354 Elim1Store]: treesize reduction 94, result has 15.3 percent of original size [2021-10-28 08:38:41,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 80 treesize of output 72 [2021-10-28 08:38:42,243 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-10-28 08:38:42,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 80 [2021-10-28 08:38:42,249 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-10-28 08:38:42,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 59 [2021-10-28 08:38:46,865 INFO L354 Elim1Store]: treesize reduction 350, result has 32.6 percent of original size [2021-10-28 08:38:46,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 14 new quantified variables, introduced 45 case distinctions, treesize of input 174 treesize of output 260 [2021-10-28 08:38:46,900 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-10-28 08:38:46,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 230 treesize of output 227 [2021-10-28 08:39:22,746 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:39:22,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117679282] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:39:22,747 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:39:22,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 51 [2021-10-28 08:39:22,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198184146] [2021-10-28 08:39:22,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-10-28 08:39:22,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:39:22,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-10-28 08:39:22,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2518, Unknown=0, NotChecked=0, Total=2652 [2021-10-28 08:39:22,749 INFO L87 Difference]: Start difference. First operand 141 states and 153 transitions. Second operand has 52 states, 49 states have (on average 1.7142857142857142) internal successors, (84), 47 states have internal predecessors, (84), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-28 08:39:37,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:39:37,882 INFO L93 Difference]: Finished difference Result 169 states and 181 transitions. [2021-10-28 08:39:37,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-10-28 08:39:37,883 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 49 states have (on average 1.7142857142857142) internal successors, (84), 47 states have internal predecessors, (84), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 51 [2021-10-28 08:39:37,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:39:37,884 INFO L225 Difference]: With dead ends: 169 [2021-10-28 08:39:37,884 INFO L226 Difference]: Without dead ends: 157 [2021-10-28 08:39:37,885 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=564, Invalid=9138, Unknown=0, NotChecked=0, Total=9702 [2021-10-28 08:39:37,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-10-28 08:39:37,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 145. [2021-10-28 08:39:37,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 131 states have (on average 1.0763358778625953) internal successors, (141), 133 states have internal predecessors, (141), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-10-28 08:39:37,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 157 transitions. [2021-10-28 08:39:37,892 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 157 transitions. Word has length 51 [2021-10-28 08:39:37,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:39:37,893 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 157 transitions. [2021-10-28 08:39:37,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 49 states have (on average 1.7142857142857142) internal successors, (84), 47 states have internal predecessors, (84), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-28 08:39:37,893 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 157 transitions. [2021-10-28 08:39:37,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-28 08:39:37,894 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:39:37,894 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-10-28 08:39:37,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-28 08:39:38,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:39:38,104 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr0ENSURES_VIOLATIONMEMORY_LEAK === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-28 08:39:38,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:39:38,104 INFO L85 PathProgramCache]: Analyzing trace with hash -665478622, now seen corresponding path program 1 times [2021-10-28 08:39:38,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:39:38,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134767494] [2021-10-28 08:39:38,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:39:38,105 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:39:38,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:39:38,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:39:38,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:39:38,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:39:38,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:39:39,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-10-28 08:39:39,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:39:40,001 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:39:40,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:39:40,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134767494] [2021-10-28 08:39:40,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134767494] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:39:40,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787926871] [2021-10-28 08:39:40,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:39:40,002 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:39:40,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:39:40,003 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:39:40,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-28 08:39:41,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:39:41,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 50 conjunts are in the unsatisfiable core [2021-10-28 08:39:41,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:39:41,286 INFO L354 Elim1Store]: treesize reduction 34, result has 30.6 percent of original size [2021-10-28 08:39:41,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 26 [2021-10-28 08:39:41,474 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-10-28 08:39:41,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2021-10-28 08:39:41,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 08:39:41,698 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-28 08:39:41,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 38 [2021-10-28 08:39:41,959 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-10-28 08:39:41,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 48 [2021-10-28 08:39:42,094 INFO L354 Elim1Store]: treesize reduction 94, result has 15.3 percent of original size [2021-10-28 08:39:42,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 80 treesize of output 72 [2021-10-28 08:39:42,602 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-10-28 08:39:42,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 82 [2021-10-28 08:39:42,607 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-10-28 08:39:42,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 62 [2021-10-28 08:39:49,245 INFO L354 Elim1Store]: treesize reduction 348, result has 32.9 percent of original size [2021-10-28 08:39:49,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 14 new quantified variables, introduced 45 case distinctions, treesize of input 174 treesize of output 262 [2021-10-28 08:39:49,278 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-10-28 08:39:49,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 232 treesize of output 229 [2021-10-28 08:39:53,871 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:39:53,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787926871] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:39:53,871 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:39:53,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25] total 50 [2021-10-28 08:39:53,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903202438] [2021-10-28 08:39:53,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-10-28 08:39:53,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:39:53,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-10-28 08:39:53,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=2419, Unknown=0, NotChecked=0, Total=2550 [2021-10-28 08:39:53,873 INFO L87 Difference]: Start difference. First operand 145 states and 157 transitions. Second operand has 51 states, 48 states have (on average 1.7708333333333333) internal successors, (85), 46 states have internal predecessors, (85), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-28 08:40:11,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:40:11,881 INFO L93 Difference]: Finished difference Result 164 states and 173 transitions. [2021-10-28 08:40:11,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-10-28 08:40:11,881 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 48 states have (on average 1.7708333333333333) internal successors, (85), 46 states have internal predecessors, (85), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 51 [2021-10-28 08:40:11,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:40:11,882 INFO L225 Difference]: With dead ends: 164 [2021-10-28 08:40:11,882 INFO L226 Difference]: Without dead ends: 134 [2021-10-28 08:40:11,884 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2094 ImplicationChecksByTransitivity, 22.4s TimeCoverageRelationStatistics Valid=562, Invalid=8944, Unknown=0, NotChecked=0, Total=9506 [2021-10-28 08:40:11,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-10-28 08:40:11,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 125. [2021-10-28 08:40:11,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 114 states have (on average 1.0701754385964912) internal successors, (122), 115 states have internal predecessors, (122), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-10-28 08:40:11,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 133 transitions. [2021-10-28 08:40:11,889 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 133 transitions. Word has length 51 [2021-10-28 08:40:11,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:40:11,890 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 133 transitions. [2021-10-28 08:40:11,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 48 states have (on average 1.7708333333333333) internal successors, (85), 46 states have internal predecessors, (85), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-28 08:40:11,890 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 133 transitions. [2021-10-28 08:40:11,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-10-28 08:40:11,891 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:40:11,891 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:40:11,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-28 08:40:12,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-10-28 08:40:12,104 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting mainErr0ENSURES_VIOLATIONMEMORY_LEAK === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-28 08:40:12,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:40:12,104 INFO L85 PathProgramCache]: Analyzing trace with hash 61109274, now seen corresponding path program 2 times [2021-10-28 08:40:12,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:40:12,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042406198] [2021-10-28 08:40:12,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:40:12,105 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:40:12,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:40:12,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:40:12,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:40:12,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:40:12,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:40:12,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-10-28 08:40:12,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:40:12,263 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:40:12,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:40:12,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042406198] [2021-10-28 08:40:12,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042406198] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:40:12,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406983297] [2021-10-28 08:40:12,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 08:40:12,264 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:40:12,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:40:12,268 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:40:12,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-28 08:40:13,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 08:40:13,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:40:13,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 08:40:13,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:40:13,786 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:40:13,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406983297] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:40:13,786 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:40:13,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 11 [2021-10-28 08:40:13,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230319575] [2021-10-28 08:40:13,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 08:40:13,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:40:13,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 08:40:13,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-10-28 08:40:13,788 INFO L87 Difference]: Start difference. First operand 125 states and 133 transitions. Second operand has 11 states, 10 states have (on average 7.8) internal successors, (78), 8 states have internal predecessors, (78), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-28 08:40:13,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:40:13,868 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2021-10-28 08:40:13,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 08:40:13,868 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 7.8) internal successors, (78), 8 states have internal predecessors, (78), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 56 [2021-10-28 08:40:13,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:40:13,869 INFO L225 Difference]: With dead ends: 48 [2021-10-28 08:40:13,869 INFO L226 Difference]: Without dead ends: 0 [2021-10-28 08:40:13,869 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-10-28 08:40:13,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-28 08:40:13,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-28 08:40:13,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2021-10-28 08:40:13,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-28 08:40:13,870 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 56 [2021-10-28 08:40:13,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:40:13,870 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 08:40:13,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 7.8) internal successors, (78), 8 states have internal predecessors, (78), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-28 08:40:13,870 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-28 08:40:13,870 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-28 08:40:13,872 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION [2021-10-28 08:40:13,873 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION [2021-10-28 08:40:13,873 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION [2021-10-28 08:40:13,873 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr3REQUIRES_VIOLATION [2021-10-28 08:40:13,873 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr4ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:40:13,873 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr5ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:40:13,873 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr6ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:40:13,873 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr7ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:40:13,874 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr8ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:40:13,874 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr9ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:40:13,874 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr10ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:40:13,874 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr11ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:40:13,874 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr12ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:40:13,874 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr13ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:40:13,874 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr14ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:40:13,874 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr15ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:40:13,874 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr16ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:40:13,874 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr17ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:40:13,875 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr18ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:40:13,875 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr19ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:40:13,875 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr20ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:40:13,875 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr21ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:40:13,875 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr22ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:40:13,875 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr23ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:40:13,875 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr24ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:40:13,875 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr25ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:40:13,875 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr26ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:40:13,875 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr27ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:40:13,875 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr28ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:40:13,876 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr29ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:40:13,876 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr30ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:40:13,876 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr31ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:40:13,876 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr32ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:40:13,876 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr33ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:40:13,876 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr34ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:40:13,876 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr35ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:40:13,876 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr36ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:40:13,876 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr37ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:40:13,876 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr38ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:40:13,877 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr39ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:40:13,877 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr40ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:40:13,877 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr41ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:40:13,877 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr42ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:40:13,877 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr43ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:40:13,877 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr44ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:40:13,877 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr45ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:40:13,877 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr46ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:40:13,877 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr47ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:40:13,877 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr48ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:40:13,877 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr0REQUIRES_VIOLATION [2021-10-28 08:40:13,878 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr1REQUIRES_VIOLATION [2021-10-28 08:40:13,878 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr2REQUIRES_VIOLATION [2021-10-28 08:40:13,878 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr3REQUIRES_VIOLATION [2021-10-28 08:40:13,878 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr4REQUIRES_VIOLATION [2021-10-28 08:40:13,878 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr5REQUIRES_VIOLATION [2021-10-28 08:40:13,878 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr6REQUIRES_VIOLATION [2021-10-28 08:40:13,878 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr7REQUIRES_VIOLATION [2021-10-28 08:40:13,878 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr8REQUIRES_VIOLATION [2021-10-28 08:40:13,878 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr9REQUIRES_VIOLATION [2021-10-28 08:40:13,878 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr10REQUIRES_VIOLATION [2021-10-28 08:40:13,878 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr11REQUIRES_VIOLATION [2021-10-28 08:40:13,878 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0ENSURES_VIOLATIONMEMORY_LEAK [2021-10-28 08:40:13,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-28 08:40:14,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:40:14,088 INFO L731 BasicCegarLoop]: Path program histogram: [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] [2021-10-28 08:40:14,090 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 08:40:14,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 08:40:14 BoogieIcfgContainer [2021-10-28 08:40:14,093 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 08:40:14,094 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 08:40:14,094 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 08:40:14,094 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 08:40:14,094 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:34:42" (3/4) ... [2021-10-28 08:40:14,110 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-28 08:40:14,116 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-10-28 08:40:14,117 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure myexit [2021-10-28 08:40:14,117 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2021-10-28 08:40:14,117 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure _destroy_in_nondeterministic_order [2021-10-28 08:40:14,117 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2021-10-28 08:40:14,117 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-10-28 08:40:14,118 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure dll_circular_create [2021-10-28 08:40:14,125 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-10-28 08:40:14,125 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-28 08:40:14,126 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 08:40:14,126 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 08:40:14,170 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/witness.graphml [2021-10-28 08:40:14,170 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 08:40:14,171 INFO L168 Benchmark]: Toolchain (without parser) took 333018.40 ms. Allocated memory was 100.7 MB in the beginning and 264.2 MB in the end (delta: 163.6 MB). Free memory was 63.2 MB in the beginning and 89.4 MB in the end (delta: -26.3 MB). Peak memory consumption was 135.7 MB. Max. memory is 16.1 GB. [2021-10-28 08:40:14,171 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 100.7 MB. Free memory was 81.1 MB in the beginning and 81.0 MB in the end (delta: 54.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 08:40:14,171 INFO L168 Benchmark]: CACSL2BoogieTranslator took 581.50 ms. Allocated memory is still 100.7 MB. Free memory was 63.0 MB in the beginning and 70.4 MB in the end (delta: -7.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 08:40:14,172 INFO L168 Benchmark]: Boogie Preprocessor took 105.85 ms. Allocated memory is still 100.7 MB. Free memory was 70.4 MB in the beginning and 67.5 MB in the end (delta: 2.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-28 08:40:14,172 INFO L168 Benchmark]: RCFGBuilder took 718.91 ms. Allocated memory is still 100.7 MB. Free memory was 67.5 MB in the beginning and 43.1 MB in the end (delta: 24.4 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2021-10-28 08:40:14,172 INFO L168 Benchmark]: TraceAbstraction took 331525.06 ms. Allocated memory was 100.7 MB in the beginning and 264.2 MB in the end (delta: 163.6 MB). Free memory was 42.8 MB in the beginning and 94.5 MB in the end (delta: -51.7 MB). Peak memory consumption was 114.6 MB. Max. memory is 16.1 GB. [2021-10-28 08:40:14,173 INFO L168 Benchmark]: Witness Printer took 76.45 ms. Allocated memory is still 264.2 MB. Free memory was 94.5 MB in the beginning and 89.4 MB in the end (delta: 5.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-28 08:40:14,174 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 100.7 MB. Free memory was 81.1 MB in the beginning and 81.0 MB in the end (delta: 54.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 581.50 ms. Allocated memory is still 100.7 MB. Free memory was 63.0 MB in the beginning and 70.4 MB in the end (delta: -7.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 105.85 ms. Allocated memory is still 100.7 MB. Free memory was 70.4 MB in the beginning and 67.5 MB in the end (delta: 2.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 718.91 ms. Allocated memory is still 100.7 MB. Free memory was 67.5 MB in the beginning and 43.1 MB in the end (delta: 24.4 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 331525.06 ms. Allocated memory was 100.7 MB in the beginning and 264.2 MB in the end (delta: 163.6 MB). Free memory was 42.8 MB in the beginning and 94.5 MB in the end (delta: -51.7 MB). Peak memory consumption was 114.6 MB. Max. memory is 16.1 GB. * Witness Printer took 76.45 ms. Allocated memory is still 264.2 MB. Free memory was 94.5 MB in the beginning and 89.4 MB in the end (delta: 5.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 586]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 586]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 587]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 587]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 589]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 589]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 589]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 591]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 591]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 591]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 592]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 592]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 592]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 594]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 594]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 594]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 595]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 595]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 595]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 598]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 598]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 598]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 600]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 600]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 600]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 601]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 601]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 601]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 603]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 603]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 603]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 604]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 604]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 604]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 607]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 607]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 607]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 609]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 609]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 609]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 610]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 610]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 610]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 612]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 612]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 612]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 613]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 613]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 613]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 568]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 568]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 569]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 569]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 576]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 576]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 577]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 577]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 581]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 581]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 582]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 582]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 617]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 8 procedures, 159 locations, 62 error locations. Started 1 CEGAR loops. OverallTime: 331.4s, OverallIterations: 34, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 186.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 2671 SDtfs, 5843 SDslu, 18643 SDs, 0 SdLazy, 39552 SolverSat, 1521 SolverUnsat, 69 SolverUnknown, 0 SolverNotchecked, 58.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2007 GetRequests, 669 SyntacticMatches, 25 SemanticMatches, 1313 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17730 ImplicationChecksByTransitivity, 169.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=152occurred in iteration=0, InterpolantAutomatonStates: 718, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 34 MinimizatonAttempts, 132 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 128.3s InterpolantComputationTime, 2081 NumberOfCodeBlocks, 2081 NumberOfCodeBlocksAsserted, 55 NumberOfCheckSat, 2027 ConstructedInterpolants, 353 QuantifiedInterpolants, 49585 SizeOfPredicates, 258 NumberOfNonLiveVariables, 4008 ConjunctsInSsa, 826 ConjunctsInUnsatCore, 54 InterpolantComputations, 14 PerfectInterpolantSequences, 57/327 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 62 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-28 08:40:14,390 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-10-28 08:40:14,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40bebcee-f889-437e-9c37-d38ed554e032/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request...