./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_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/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_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD --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 [2021-10-29 00:03:13,793 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-29 00:03:13,795 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-29 00:03:13,828 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-29 00:03:13,829 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-29 00:03:13,830 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-29 00:03:13,832 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-29 00:03:13,835 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-29 00:03:13,837 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-29 00:03:13,838 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-29 00:03:13,840 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-29 00:03:13,841 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-29 00:03:13,842 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-29 00:03:13,843 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-29 00:03:13,845 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-29 00:03:13,847 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-29 00:03:13,848 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-29 00:03:13,849 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-29 00:03:13,852 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-29 00:03:13,854 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-29 00:03:13,856 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-29 00:03:13,858 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-29 00:03:13,860 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-29 00:03:13,861 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-29 00:03:13,865 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-29 00:03:13,865 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-29 00:03:13,866 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-29 00:03:13,867 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-29 00:03:13,868 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-29 00:03:13,869 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-29 00:03:13,869 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-29 00:03:13,870 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-29 00:03:13,871 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-29 00:03:13,872 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-29 00:03:13,874 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-29 00:03:13,874 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-29 00:03:13,875 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-29 00:03:13,876 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-29 00:03:13,876 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-29 00:03:13,877 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-29 00:03:13,878 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-29 00:03:13,879 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-29 00:03:13,904 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-29 00:03:13,904 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-29 00:03:13,904 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-29 00:03:13,905 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-29 00:03:13,906 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-29 00:03:13,906 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-29 00:03:13,906 INFO L138 SettingsManager]: * Use SBE=true [2021-10-29 00:03:13,907 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-29 00:03:13,907 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-29 00:03:13,907 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-29 00:03:13,907 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-29 00:03:13,908 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-29 00:03:13,908 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-29 00:03:13,908 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-29 00:03:13,908 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-29 00:03:13,908 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-29 00:03:13,909 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-29 00:03:13,909 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-29 00:03:13,909 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-29 00:03:13,909 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-29 00:03:13,910 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-29 00:03:13,910 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-29 00:03:13,910 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-29 00:03:13,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 00:03:13,911 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-29 00:03:13,911 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-29 00:03:13,911 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-29 00:03:13,911 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-29 00:03:13,911 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-29 00:03:13,912 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_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f6eaec015dd6fdb220ef146938a83a65106037c982563310cbbb34d0417543f1 [2021-10-29 00:03:14,139 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-29 00:03:14,160 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-29 00:03:14,162 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-29 00:03:14,164 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-29 00:03:14,165 INFO L275 PluginConnector]: CDTParser initialized [2021-10-29 00:03:14,166 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/../../sv-benchmarks/c/list-ext3-properties/dll_nondet_free_order-1.i [2021-10-29 00:03:14,254 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/data/334b30b32/0f0bcfe01b0a41f5b4d25d04a9cd32f9/FLAG6f834ce99 [2021-10-29 00:03:14,821 INFO L306 CDTParser]: Found 1 translation units. [2021-10-29 00:03:14,822 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/sv-benchmarks/c/list-ext3-properties/dll_nondet_free_order-1.i [2021-10-29 00:03:14,835 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/data/334b30b32/0f0bcfe01b0a41f5b4d25d04a9cd32f9/FLAG6f834ce99 [2021-10-29 00:03:15,148 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/data/334b30b32/0f0bcfe01b0a41f5b4d25d04a9cd32f9 [2021-10-29 00:03:15,150 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-29 00:03:15,152 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-29 00:03:15,157 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-29 00:03:15,157 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-29 00:03:15,160 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-29 00:03:15,160 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 12:03:15" (1/1) ... [2021-10-29 00:03:15,161 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b6d7661 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:03:15, skipping insertion in model container [2021-10-29 00:03:15,161 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 12:03:15" (1/1) ... [2021-10-29 00:03:15,171 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-29 00:03:15,214 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-29 00:03:15,549 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 00:03:15,559 INFO L203 MainTranslator]: Completed pre-run [2021-10-29 00:03:15,625 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 00:03:15,654 INFO L208 MainTranslator]: Completed translation [2021-10-29 00:03:15,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:03:15 WrapperNode [2021-10-29 00:03:15,654 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-29 00:03:15,656 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-29 00:03:15,656 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-29 00:03:15,656 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-29 00:03:15,667 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:03:15" (1/1) ... [2021-10-29 00:03:15,667 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:03:15" (1/1) ... [2021-10-29 00:03:15,683 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:03:15" (1/1) ... [2021-10-29 00:03:15,684 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:03:15" (1/1) ... [2021-10-29 00:03:15,714 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:03:15" (1/1) ... [2021-10-29 00:03:15,719 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:03:15" (1/1) ... [2021-10-29 00:03:15,733 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:03:15" (1/1) ... [2021-10-29 00:03:15,740 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-29 00:03:15,741 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-29 00:03:15,741 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-29 00:03:15,741 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-29 00:03:15,752 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:03:15" (1/1) ... [2021-10-29 00:03:15,766 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 00:03:15,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:03:15,801 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-29 00:03:15,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-29 00:03:15,837 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-29 00:03:15,838 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-29 00:03:15,838 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-29 00:03:15,838 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-29 00:03:15,838 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-10-29 00:03:15,838 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_create [2021-10-29 00:03:15,838 INFO L138 BoogieDeclarations]: Found implementation of procedure _destroy_in_nondeterministic_order [2021-10-29 00:03:15,839 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-29 00:03:15,839 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-29 00:03:15,839 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-29 00:03:15,839 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-29 00:03:15,839 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-29 00:03:15,839 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-29 00:03:15,840 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-29 00:03:15,840 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-29 00:03:15,840 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-29 00:03:15,840 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-29 00:03:15,840 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-29 00:03:15,840 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-29 00:03:15,841 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-29 00:03:15,841 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-29 00:03:15,841 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-29 00:03:15,841 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-29 00:03:15,841 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-29 00:03:15,841 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-29 00:03:15,841 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-29 00:03:15,842 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-29 00:03:15,842 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-29 00:03:15,842 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-29 00:03:15,842 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-29 00:03:15,842 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-29 00:03:15,842 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-29 00:03:15,843 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-29 00:03:15,843 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-29 00:03:15,843 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-29 00:03:15,843 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-29 00:03:15,843 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-29 00:03:15,843 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-29 00:03:15,844 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-29 00:03:15,844 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-29 00:03:15,844 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-29 00:03:15,844 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-29 00:03:15,844 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-29 00:03:15,844 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-29 00:03:15,845 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-29 00:03:15,845 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-29 00:03:15,845 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-29 00:03:15,845 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-29 00:03:15,845 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-29 00:03:15,845 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-29 00:03:15,845 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-29 00:03:15,846 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-29 00:03:15,846 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-29 00:03:15,846 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-29 00:03:15,846 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-29 00:03:15,846 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-29 00:03:15,846 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-29 00:03:15,847 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-29 00:03:15,847 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-29 00:03:15,847 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-29 00:03:15,847 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-29 00:03:15,847 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-29 00:03:15,847 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-29 00:03:15,848 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-29 00:03:15,848 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-29 00:03:15,848 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-10-29 00:03:15,848 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-29 00:03:15,848 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-29 00:03:15,848 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-29 00:03:15,848 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-29 00:03:15,849 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-29 00:03:15,849 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-29 00:03:15,849 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-29 00:03:15,849 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-29 00:03:15,849 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-29 00:03:15,849 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-29 00:03:15,850 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-29 00:03:15,850 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-29 00:03:15,850 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-29 00:03:15,850 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-29 00:03:15,850 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-29 00:03:15,850 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-29 00:03:15,851 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-29 00:03:15,851 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-29 00:03:15,851 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-29 00:03:15,851 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-29 00:03:15,851 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-29 00:03:15,851 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-29 00:03:15,852 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-29 00:03:15,852 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-29 00:03:15,852 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-29 00:03:15,852 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-29 00:03:15,852 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-29 00:03:15,853 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-29 00:03:15,853 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-29 00:03:15,853 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-29 00:03:15,853 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-29 00:03:15,853 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-29 00:03:15,853 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-29 00:03:15,854 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-29 00:03:15,854 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-29 00:03:15,854 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-29 00:03:15,854 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-29 00:03:15,854 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-29 00:03:15,855 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-29 00:03:15,855 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-29 00:03:15,855 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-29 00:03:15,855 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-29 00:03:15,855 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-29 00:03:15,855 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-29 00:03:15,856 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-29 00:03:15,856 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-29 00:03:15,856 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-29 00:03:15,856 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-29 00:03:15,856 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-10-29 00:03:15,857 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_create [2021-10-29 00:03:15,857 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-29 00:03:15,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-29 00:03:15,857 INFO L130 BoogieDeclarations]: Found specification of procedure _destroy_in_nondeterministic_order [2021-10-29 00:03:15,857 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-29 00:03:15,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-29 00:03:15,858 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-29 00:03:15,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-29 00:03:15,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-29 00:03:16,471 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-10-29 00:03:16,512 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-29 00:03:16,513 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-10-29 00:03:16,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 12:03:16 BoogieIcfgContainer [2021-10-29 00:03:16,518 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-29 00:03:16,521 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-29 00:03:16,525 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-29 00:03:16,528 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-29 00:03:16,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 12:03:15" (1/3) ... [2021-10-29 00:03:16,530 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31732369 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 12:03:16, skipping insertion in model container [2021-10-29 00:03:16,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:03:15" (2/3) ... [2021-10-29 00:03:16,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31732369 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 12:03:16, skipping insertion in model container [2021-10-29 00:03:16,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 12:03:16" (3/3) ... [2021-10-29 00:03:16,534 INFO L111 eAbstractionObserver]: Analyzing ICFG dll_nondet_free_order-1.i [2021-10-29 00:03:16,546 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-29 00:03:16,550 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 62 error locations. [2021-10-29 00:03:16,608 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-29 00:03:16,614 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 [2021-10-29 00:03:16,614 INFO L340 AbstractCegarLoop]: Starting to check reachability of 62 error locations. [2021-10-29 00:03:16,648 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) [2021-10-29 00:03:16,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-29 00:03:16,657 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:03:16,657 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 00:03:16,658 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)] === [2021-10-29 00:03:16,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:03:16,664 INFO L85 PathProgramCache]: Analyzing trace with hash -23350716, now seen corresponding path program 1 times [2021-10-29 00:03:16,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:03:16,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639766131] [2021-10-29 00:03:16,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:03:16,676 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:03:16,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:03:16,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-29 00:03:16,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:03:16,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:03:16,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:03:16,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639766131] [2021-10-29 00:03:16,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639766131] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 00:03:16,876 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 00:03:16,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-29 00:03:16,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012583839] [2021-10-29 00:03:16,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-29 00:03:16,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:03:16,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-29 00:03:16,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-29 00:03:16,901 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) [2021-10-29 00:03:17,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:03:17,175 INFO L93 Difference]: Finished difference Result 149 states and 156 transitions. [2021-10-29 00:03:17,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-29 00:03:17,177 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 [2021-10-29 00:03:17,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:03:17,190 INFO L225 Difference]: With dead ends: 149 [2021-10-29 00:03:17,190 INFO L226 Difference]: Without dead ends: 142 [2021-10-29 00:03:17,194 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 [2021-10-29 00:03:17,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-10-29 00:03:17,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-10-29 00:03:17,253 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) [2021-10-29 00:03:17,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 147 transitions. [2021-10-29 00:03:17,268 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 147 transitions. Word has length 10 [2021-10-29 00:03:17,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:03:17,268 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 147 transitions. [2021-10-29 00:03:17,272 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) [2021-10-29 00:03:17,272 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 147 transitions. [2021-10-29 00:03:17,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-29 00:03:17,273 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:03:17,274 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 00:03:17,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-29 00:03:17,274 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)] === [2021-10-29 00:03:17,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:03:17,275 INFO L85 PathProgramCache]: Analyzing trace with hash -23350715, now seen corresponding path program 1 times [2021-10-29 00:03:17,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:03:17,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080866451] [2021-10-29 00:03:17,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:03:17,277 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:03:17,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:03:17,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-29 00:03:17,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:03:17,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:03:17,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:03:17,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080866451] [2021-10-29 00:03:17,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080866451] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 00:03:17,368 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 00:03:17,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-29 00:03:17,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563397377] [2021-10-29 00:03:17,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-29 00:03:17,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:03:17,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-29 00:03:17,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-29 00:03:17,372 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) [2021-10-29 00:03:17,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:03:17,619 INFO L93 Difference]: Finished difference Result 139 states and 144 transitions. [2021-10-29 00:03:17,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-29 00:03:17,620 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 [2021-10-29 00:03:17,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:03:17,624 INFO L225 Difference]: With dead ends: 139 [2021-10-29 00:03:17,624 INFO L226 Difference]: Without dead ends: 139 [2021-10-29 00:03:17,625 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 [2021-10-29 00:03:17,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-10-29 00:03:17,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2021-10-29 00:03:17,640 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) [2021-10-29 00:03:17,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 144 transitions. [2021-10-29 00:03:17,642 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 144 transitions. Word has length 10 [2021-10-29 00:03:17,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:03:17,642 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 144 transitions. [2021-10-29 00:03:17,643 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) [2021-10-29 00:03:17,643 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 144 transitions. [2021-10-29 00:03:17,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-29 00:03:17,643 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:03:17,644 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 00:03:17,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-29 00:03:17,644 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)] === [2021-10-29 00:03:17,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:03:17,645 INFO L85 PathProgramCache]: Analyzing trace with hash 589419475, now seen corresponding path program 1 times [2021-10-29 00:03:17,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:03:17,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751565172] [2021-10-29 00:03:17,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:03:17,646 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:03:17,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:03:17,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-29 00:03:17,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:03:17,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:03:17,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:03:17,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751565172] [2021-10-29 00:03:17,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751565172] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 00:03:17,776 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 00:03:17,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-29 00:03:17,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38496871] [2021-10-29 00:03:17,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-29 00:03:17,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:03:17,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-29 00:03:17,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-29 00:03:17,778 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) [2021-10-29 00:03:18,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:03:18,098 INFO L93 Difference]: Finished difference Result 149 states and 155 transitions. [2021-10-29 00:03:18,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-29 00:03:18,098 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 [2021-10-29 00:03:18,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:03:18,100 INFO L225 Difference]: With dead ends: 149 [2021-10-29 00:03:18,100 INFO L226 Difference]: Without dead ends: 149 [2021-10-29 00:03:18,100 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 [2021-10-29 00:03:18,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-10-29 00:03:18,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 145. [2021-10-29 00:03:18,108 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) [2021-10-29 00:03:18,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 155 transitions. [2021-10-29 00:03:18,109 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 155 transitions. Word has length 15 [2021-10-29 00:03:18,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:03:18,110 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 155 transitions. [2021-10-29 00:03:18,110 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) [2021-10-29 00:03:18,110 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 155 transitions. [2021-10-29 00:03:18,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-29 00:03:18,111 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:03:18,111 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 00:03:18,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-29 00:03:18,111 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)] === [2021-10-29 00:03:18,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:03:18,112 INFO L85 PathProgramCache]: Analyzing trace with hash 589419476, now seen corresponding path program 1 times [2021-10-29 00:03:18,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:03:18,112 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010953662] [2021-10-29 00:03:18,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:03:18,113 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:03:18,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:03:18,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-29 00:03:18,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:03:18,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:03:18,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:03:18,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010953662] [2021-10-29 00:03:18,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010953662] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 00:03:18,182 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 00:03:18,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-29 00:03:18,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903872105] [2021-10-29 00:03:18,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-29 00:03:18,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:03:18,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-29 00:03:18,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-29 00:03:18,184 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) [2021-10-29 00:03:18,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:03:18,423 INFO L93 Difference]: Finished difference Result 147 states and 152 transitions. [2021-10-29 00:03:18,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-29 00:03:18,423 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 [2021-10-29 00:03:18,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:03:18,425 INFO L225 Difference]: With dead ends: 147 [2021-10-29 00:03:18,425 INFO L226 Difference]: Without dead ends: 147 [2021-10-29 00:03:18,425 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 [2021-10-29 00:03:18,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-10-29 00:03:18,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 143. [2021-10-29 00:03:18,430 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) [2021-10-29 00:03:18,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 151 transitions. [2021-10-29 00:03:18,432 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 151 transitions. Word has length 15 [2021-10-29 00:03:18,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:03:18,432 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 151 transitions. [2021-10-29 00:03:18,432 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) [2021-10-29 00:03:18,433 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 151 transitions. [2021-10-29 00:03:18,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-29 00:03:18,433 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:03:18,433 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 00:03:18,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-29 00:03:18,434 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)] === [2021-10-29 00:03:18,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:03:18,434 INFO L85 PathProgramCache]: Analyzing trace with hash 589421012, now seen corresponding path program 1 times [2021-10-29 00:03:18,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:03:18,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874103989] [2021-10-29 00:03:18,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:03:18,435 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:03:18,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:03:18,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-29 00:03:18,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:03:18,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:03:18,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:03:18,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874103989] [2021-10-29 00:03:18,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874103989] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 00:03:18,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 00:03:18,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-29 00:03:18,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208632692] [2021-10-29 00:03:18,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-29 00:03:18,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:03:18,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-29 00:03:18,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-29 00:03:18,483 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) [2021-10-29 00:03:18,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:03:18,670 INFO L93 Difference]: Finished difference Result 142 states and 149 transitions. [2021-10-29 00:03:18,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-29 00:03:18,671 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 [2021-10-29 00:03:18,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:03:18,672 INFO L225 Difference]: With dead ends: 142 [2021-10-29 00:03:18,673 INFO L226 Difference]: Without dead ends: 142 [2021-10-29 00:03:18,673 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 [2021-10-29 00:03:18,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-10-29 00:03:18,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-10-29 00:03:18,678 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) [2021-10-29 00:03:18,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 149 transitions. [2021-10-29 00:03:18,680 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 149 transitions. Word has length 15 [2021-10-29 00:03:18,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:03:18,680 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 149 transitions. [2021-10-29 00:03:18,680 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) [2021-10-29 00:03:18,681 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 149 transitions. [2021-10-29 00:03:18,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-29 00:03:18,681 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:03:18,681 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 00:03:18,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-29 00:03:18,682 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)] === [2021-10-29 00:03:18,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:03:18,682 INFO L85 PathProgramCache]: Analyzing trace with hash 589421013, now seen corresponding path program 1 times [2021-10-29 00:03:18,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:03:18,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933942918] [2021-10-29 00:03:18,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:03:18,683 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:03:18,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:03:18,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-29 00:03:18,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:03:18,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:03:18,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:03:18,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933942918] [2021-10-29 00:03:18,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933942918] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 00:03:18,734 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 00:03:18,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-29 00:03:18,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371475925] [2021-10-29 00:03:18,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-29 00:03:18,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:03:18,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-29 00:03:18,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-29 00:03:18,736 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) [2021-10-29 00:03:18,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:03:18,911 INFO L93 Difference]: Finished difference Result 141 states and 147 transitions. [2021-10-29 00:03:18,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-29 00:03:18,911 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 [2021-10-29 00:03:18,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:03:18,912 INFO L225 Difference]: With dead ends: 141 [2021-10-29 00:03:18,913 INFO L226 Difference]: Without dead ends: 141 [2021-10-29 00:03:18,914 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 [2021-10-29 00:03:18,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-10-29 00:03:18,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2021-10-29 00:03:18,921 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) [2021-10-29 00:03:18,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 147 transitions. [2021-10-29 00:03:18,926 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 147 transitions. Word has length 15 [2021-10-29 00:03:18,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:03:18,927 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 147 transitions. [2021-10-29 00:03:18,927 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) [2021-10-29 00:03:18,927 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 147 transitions. [2021-10-29 00:03:18,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-29 00:03:18,928 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:03:18,928 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 00:03:18,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-29 00:03:18,929 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)] === [2021-10-29 00:03:18,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:03:18,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1092182321, now seen corresponding path program 1 times [2021-10-29 00:03:18,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:03:18,931 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958338056] [2021-10-29 00:03:18,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:03:18,935 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:03:18,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:03:19,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-29 00:03:19,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:03:19,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:03:19,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:03:19,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958338056] [2021-10-29 00:03:19,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958338056] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 00:03:19,083 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 00:03:19,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-29 00:03:19,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192221436] [2021-10-29 00:03:19,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-29 00:03:19,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:03:19,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-29 00:03:19,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-29 00:03:19,086 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) [2021-10-29 00:03:19,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:03:19,302 INFO L93 Difference]: Finished difference Result 142 states and 147 transitions. [2021-10-29 00:03:19,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-29 00:03:19,303 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 [2021-10-29 00:03:19,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:03:19,304 INFO L225 Difference]: With dead ends: 142 [2021-10-29 00:03:19,304 INFO L226 Difference]: Without dead ends: 142 [2021-10-29 00:03:19,305 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 [2021-10-29 00:03:19,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-10-29 00:03:19,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2021-10-29 00:03:19,309 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) [2021-10-29 00:03:19,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 146 transitions. [2021-10-29 00:03:19,310 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 146 transitions. Word has length 16 [2021-10-29 00:03:19,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:03:19,311 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 146 transitions. [2021-10-29 00:03:19,311 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) [2021-10-29 00:03:19,311 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 146 transitions. [2021-10-29 00:03:19,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-29 00:03:19,312 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:03:19,313 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] [2021-10-29 00:03:19,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-29 00:03:19,313 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)] === [2021-10-29 00:03:19,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:03:19,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1717860195, now seen corresponding path program 1 times [2021-10-29 00:03:19,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:03:19,315 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315714857] [2021-10-29 00:03:19,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:03:19,315 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:03:19,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:03:19,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-29 00:03:19,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:03:19,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:03:19,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:03:19,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315714857] [2021-10-29 00:03:19,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315714857] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 00:03:19,398 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 00:03:19,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-29 00:03:19,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347641039] [2021-10-29 00:03:19,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-29 00:03:19,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:03:19,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-29 00:03:19,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-29 00:03:19,400 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) [2021-10-29 00:03:19,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:03:19,621 INFO L93 Difference]: Finished difference Result 139 states and 144 transitions. [2021-10-29 00:03:19,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-29 00:03:19,622 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 [2021-10-29 00:03:19,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:03:19,623 INFO L225 Difference]: With dead ends: 139 [2021-10-29 00:03:19,623 INFO L226 Difference]: Without dead ends: 139 [2021-10-29 00:03:19,623 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 [2021-10-29 00:03:19,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-10-29 00:03:19,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2021-10-29 00:03:19,626 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) [2021-10-29 00:03:19,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 144 transitions. [2021-10-29 00:03:19,627 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 144 transitions. Word has length 20 [2021-10-29 00:03:19,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:03:19,627 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 144 transitions. [2021-10-29 00:03:19,628 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) [2021-10-29 00:03:19,628 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 144 transitions. [2021-10-29 00:03:19,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-29 00:03:19,628 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:03:19,628 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] [2021-10-29 00:03:19,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-29 00:03:19,629 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)] === [2021-10-29 00:03:19,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:03:19,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1717860196, now seen corresponding path program 1 times [2021-10-29 00:03:19,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:03:19,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571735873] [2021-10-29 00:03:19,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:03:19,630 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:03:19,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:03:19,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-29 00:03:19,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:03:19,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:03:19,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:03:19,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571735873] [2021-10-29 00:03:19,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571735873] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:03:19,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454874304] [2021-10-29 00:03:19,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:03:19,687 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:03:19,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:03:19,689 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:03:19,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-29 00:03:19,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:03:19,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-29 00:03:19,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:03:19,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:03:19,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454874304] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:03:19,918 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 00:03:19,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-10-29 00:03:19,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259906642] [2021-10-29 00:03:19,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-29 00:03:19,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:03:19,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-29 00:03:19,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-29 00:03:19,920 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) [2021-10-29 00:03:20,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:03:20,165 INFO L93 Difference]: Finished difference Result 141 states and 146 transitions. [2021-10-29 00:03:20,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-29 00:03:20,166 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 [2021-10-29 00:03:20,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:03:20,167 INFO L225 Difference]: With dead ends: 141 [2021-10-29 00:03:20,167 INFO L226 Difference]: Without dead ends: 141 [2021-10-29 00:03:20,167 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 [2021-10-29 00:03:20,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-10-29 00:03:20,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2021-10-29 00:03:20,172 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) [2021-10-29 00:03:20,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 146 transitions. [2021-10-29 00:03:20,173 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 146 transitions. Word has length 20 [2021-10-29 00:03:20,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:03:20,174 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 146 transitions. [2021-10-29 00:03:20,175 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) [2021-10-29 00:03:20,175 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 146 transitions. [2021-10-29 00:03:20,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-29 00:03:20,175 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:03:20,176 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 00:03:20,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-29 00:03:20,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:03:20,392 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)] === [2021-10-29 00:03:20,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:03:20,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1714106273, now seen corresponding path program 1 times [2021-10-29 00:03:20,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:03:20,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61165886] [2021-10-29 00:03:20,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:03:20,393 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:03:20,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:03:20,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-29 00:03:20,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:03:20,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:03:20,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:03:20,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61165886] [2021-10-29 00:03:20,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61165886] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:03:20,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598673182] [2021-10-29 00:03:20,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:03:20,493 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:03:20,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:03:20,495 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:03:20,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-29 00:03:20,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:03:20,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-29 00:03:20,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:03:20,699 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 [2021-10-29 00:03:20,706 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 [2021-10-29 00:03:20,840 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-29 00:03:20,841 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 [2021-10-29 00:03:20,852 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-29 00:03:20,852 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 [2021-10-29 00:03:20,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:03:20,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598673182] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:03:20,969 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 00:03:20,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-10-29 00:03:20,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900062401] [2021-10-29 00:03:20,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-29 00:03:20,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:03:20,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-29 00:03:20,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-29 00:03:20,972 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) [2021-10-29 00:03:21,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:03:21,254 INFO L93 Difference]: Finished difference Result 139 states and 144 transitions. [2021-10-29 00:03:21,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-29 00:03:21,254 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 [2021-10-29 00:03:21,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:03:21,256 INFO L225 Difference]: With dead ends: 139 [2021-10-29 00:03:21,256 INFO L226 Difference]: Without dead ends: 139 [2021-10-29 00:03:21,256 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 [2021-10-29 00:03:21,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-10-29 00:03:21,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2021-10-29 00:03:21,259 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) [2021-10-29 00:03:21,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 144 transitions. [2021-10-29 00:03:21,260 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 144 transitions. Word has length 21 [2021-10-29 00:03:21,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:03:21,261 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 144 transitions. [2021-10-29 00:03:21,261 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) [2021-10-29 00:03:21,261 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 144 transitions. [2021-10-29 00:03:21,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-29 00:03:21,263 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:03:21,263 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] [2021-10-29 00:03:21,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-29 00:03:21,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-29 00:03:21,476 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)] === [2021-10-29 00:03:21,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:03:21,477 INFO L85 PathProgramCache]: Analyzing trace with hash 964765578, now seen corresponding path program 1 times [2021-10-29 00:03:21,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:03:21,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825424478] [2021-10-29 00:03:21,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:03:21,477 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:03:21,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:03:21,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-29 00:03:21,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:03:21,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-29 00:03:21,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:03:21,637 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-29 00:03:21,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:03:21,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825424478] [2021-10-29 00:03:21,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825424478] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 00:03:21,638 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 00:03:21,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-29 00:03:21,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882828714] [2021-10-29 00:03:21,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-29 00:03:21,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:03:21,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-29 00:03:21,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-10-29 00:03:21,640 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) [2021-10-29 00:03:22,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:03:22,134 INFO L93 Difference]: Finished difference Result 136 states and 141 transitions. [2021-10-29 00:03:22,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-29 00:03:22,135 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 [2021-10-29 00:03:22,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:03:22,136 INFO L225 Difference]: With dead ends: 136 [2021-10-29 00:03:22,136 INFO L226 Difference]: Without dead ends: 136 [2021-10-29 00:03:22,137 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 [2021-10-29 00:03:22,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-10-29 00:03:22,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2021-10-29 00:03:22,140 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) [2021-10-29 00:03:22,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 141 transitions. [2021-10-29 00:03:22,141 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 141 transitions. Word has length 32 [2021-10-29 00:03:22,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:03:22,141 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 141 transitions. [2021-10-29 00:03:22,141 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) [2021-10-29 00:03:22,141 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 141 transitions. [2021-10-29 00:03:22,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-29 00:03:22,142 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:03:22,142 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] [2021-10-29 00:03:22,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-29 00:03:22,143 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)] === [2021-10-29 00:03:22,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:03:22,143 INFO L85 PathProgramCache]: Analyzing trace with hash 964765579, now seen corresponding path program 1 times [2021-10-29 00:03:22,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:03:22,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401956485] [2021-10-29 00:03:22,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:03:22,145 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:03:22,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:03:22,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-29 00:03:22,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:03:22,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-29 00:03:22,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:03:22,385 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-29 00:03:22,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:03:22,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401956485] [2021-10-29 00:03:22,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401956485] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 00:03:22,386 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 00:03:22,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-29 00:03:22,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081876041] [2021-10-29 00:03:22,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-29 00:03:22,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:03:22,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-29 00:03:22,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-10-29 00:03:22,389 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) [2021-10-29 00:03:23,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:03:23,010 INFO L93 Difference]: Finished difference Result 129 states and 134 transitions. [2021-10-29 00:03:23,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-29 00:03:23,010 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 [2021-10-29 00:03:23,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:03:23,011 INFO L225 Difference]: With dead ends: 129 [2021-10-29 00:03:23,011 INFO L226 Difference]: Without dead ends: 129 [2021-10-29 00:03:23,011 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 [2021-10-29 00:03:23,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-10-29 00:03:23,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-10-29 00:03:23,014 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) [2021-10-29 00:03:23,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 134 transitions. [2021-10-29 00:03:23,015 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 134 transitions. Word has length 32 [2021-10-29 00:03:23,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:03:23,016 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 134 transitions. [2021-10-29 00:03:23,016 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) [2021-10-29 00:03:23,016 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 134 transitions. [2021-10-29 00:03:23,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-29 00:03:23,018 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:03:23,018 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] [2021-10-29 00:03:23,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-29 00:03:23,018 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)] === [2021-10-29 00:03:23,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:03:23,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1105471948, now seen corresponding path program 1 times [2021-10-29 00:03:23,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:03:23,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434240618] [2021-10-29 00:03:23,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:03:23,020 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:03:23,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:03:23,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-29 00:03:23,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:03:23,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-29 00:03:23,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:03:23,494 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:03:23,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:03:23,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434240618] [2021-10-29 00:03:23,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434240618] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:03:23,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109535182] [2021-10-29 00:03:23,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:03:23,495 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:03:23,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:03:23,500 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:03:23,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-29 00:03:23,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:03:23,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 47 conjunts are in the unsatisfiable core [2021-10-29 00:03:23,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:03:23,678 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 [2021-10-29 00:03:23,761 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-29 00:03:23,762 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 [2021-10-29 00:03:23,934 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-10-29 00:03:23,934 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 [2021-10-29 00:03:24,012 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 [2021-10-29 00:03:24,082 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 [2021-10-29 00:03:24,317 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-10-29 00:03:24,318 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 [2021-10-29 00:03:24,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 00:03:24,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-29 00:03:24,439 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-29 00:03:24,440 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 [2021-10-29 00:03:25,170 INFO L354 Elim1Store]: treesize reduction 78, result has 3.7 percent of original size [2021-10-29 00:03:25,170 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 [2021-10-29 00:03:25,185 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:03:25,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109535182] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:03:25,186 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 00:03:25,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 34 [2021-10-29 00:03:25,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180386282] [2021-10-29 00:03:25,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-29 00:03:25,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:03:25,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-29 00:03:25,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1098, Unknown=0, NotChecked=0, Total=1190 [2021-10-29 00:03:25,188 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) [2021-10-29 00:03:27,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:03:27,170 INFO L93 Difference]: Finished difference Result 126 states and 131 transitions. [2021-10-29 00:03:27,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-29 00:03:27,171 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 [2021-10-29 00:03:27,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:03:27,172 INFO L225 Difference]: With dead ends: 126 [2021-10-29 00:03:27,172 INFO L226 Difference]: Without dead ends: 126 [2021-10-29 00:03:27,174 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=333, Invalid=2423, Unknown=0, NotChecked=0, Total=2756 [2021-10-29 00:03:27,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-10-29 00:03:27,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2021-10-29 00:03:27,177 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) [2021-10-29 00:03:27,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 129 transitions. [2021-10-29 00:03:27,177 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 129 transitions. Word has length 38 [2021-10-29 00:03:27,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:03:27,178 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 129 transitions. [2021-10-29 00:03:27,178 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) [2021-10-29 00:03:27,178 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 129 transitions. [2021-10-29 00:03:27,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-29 00:03:27,179 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:03:27,179 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] [2021-10-29 00:03:27,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-29 00:03:27,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:03:27,396 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)] === [2021-10-29 00:03:27,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:03:27,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1105470732, now seen corresponding path program 1 times [2021-10-29 00:03:27,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:03:27,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940297168] [2021-10-29 00:03:27,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:03:27,397 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:03:27,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:03:27,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-29 00:03:27,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:03:27,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-29 00:03:27,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:03:27,664 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-29 00:03:27,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:03:27,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940297168] [2021-10-29 00:03:27,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940297168] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 00:03:27,665 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 00:03:27,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-10-29 00:03:27,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952624932] [2021-10-29 00:03:27,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-29 00:03:27,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:03:27,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-29 00:03:27,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-10-29 00:03:27,666 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) [2021-10-29 00:03:28,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:03:28,301 INFO L93 Difference]: Finished difference Result 119 states and 124 transitions. [2021-10-29 00:03:28,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-29 00:03:28,302 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 [2021-10-29 00:03:28,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:03:28,303 INFO L225 Difference]: With dead ends: 119 [2021-10-29 00:03:28,304 INFO L226 Difference]: Without dead ends: 119 [2021-10-29 00:03:28,304 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 [2021-10-29 00:03:28,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-10-29 00:03:28,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2021-10-29 00:03:28,307 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) [2021-10-29 00:03:28,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 124 transitions. [2021-10-29 00:03:28,308 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 124 transitions. Word has length 38 [2021-10-29 00:03:28,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:03:28,316 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 124 transitions. [2021-10-29 00:03:28,316 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) [2021-10-29 00:03:28,317 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 124 transitions. [2021-10-29 00:03:28,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-29 00:03:28,320 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:03:28,320 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] [2021-10-29 00:03:28,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-29 00:03:28,321 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)] === [2021-10-29 00:03:28,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:03:28,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1105509714, now seen corresponding path program 1 times [2021-10-29 00:03:28,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:03:28,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765841658] [2021-10-29 00:03:28,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:03:28,322 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:03:28,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:03:28,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-29 00:03:28,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:03:28,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-29 00:03:28,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:03:28,443 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-29 00:03:28,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:03:28,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765841658] [2021-10-29 00:03:28,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765841658] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 00:03:28,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 00:03:28,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-29 00:03:28,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099581833] [2021-10-29 00:03:28,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-29 00:03:28,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:03:28,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-29 00:03:28,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-10-29 00:03:28,446 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) [2021-10-29 00:03:28,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:03:28,894 INFO L93 Difference]: Finished difference Result 114 states and 119 transitions. [2021-10-29 00:03:28,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-29 00:03:28,895 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 [2021-10-29 00:03:28,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:03:28,896 INFO L225 Difference]: With dead ends: 114 [2021-10-29 00:03:28,896 INFO L226 Difference]: Without dead ends: 114 [2021-10-29 00:03:28,896 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 [2021-10-29 00:03:28,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-10-29 00:03:28,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2021-10-29 00:03:28,899 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) [2021-10-29 00:03:28,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 119 transitions. [2021-10-29 00:03:28,900 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 119 transitions. Word has length 38 [2021-10-29 00:03:28,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:03:28,900 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 119 transitions. [2021-10-29 00:03:28,900 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) [2021-10-29 00:03:28,901 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 119 transitions. [2021-10-29 00:03:28,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-29 00:03:28,901 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:03:28,901 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] [2021-10-29 00:03:28,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-29 00:03:28,902 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)] === [2021-10-29 00:03:28,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:03:28,902 INFO L85 PathProgramCache]: Analyzing trace with hash 90108066, now seen corresponding path program 1 times [2021-10-29 00:03:28,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:03:28,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306394305] [2021-10-29 00:03:28,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:03:28,902 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:03:28,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:03:29,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-29 00:03:29,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:03:29,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-29 00:03:29,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:03:29,403 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:03:29,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:03:29,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306394305] [2021-10-29 00:03:29,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306394305] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:03:29,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669133320] [2021-10-29 00:03:29,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:03:29,404 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:03:29,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:03:29,412 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:03:29,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-29 00:03:29,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:03:29,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 43 conjunts are in the unsatisfiable core [2021-10-29 00:03:29,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:03:29,660 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 [2021-10-29 00:03:29,754 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-10-29 00:03:29,754 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 [2021-10-29 00:03:29,791 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 [2021-10-29 00:03:29,861 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-29 00:03:29,861 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 [2021-10-29 00:03:30,051 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-10-29 00:03:30,051 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 [2021-10-29 00:03:30,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 00:03:30,163 INFO L354 Elim1Store]: treesize reduction 102, result has 14.3 percent of original size [2021-10-29 00:03:30,163 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 [2021-10-29 00:03:30,815 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-10-29 00:03:30,815 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 [2021-10-29 00:03:30,832 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:03:30,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669133320] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:03:30,832 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 00:03:30,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 30 [2021-10-29 00:03:30,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406663336] [2021-10-29 00:03:30,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-29 00:03:30,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:03:30,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-29 00:03:30,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=852, Unknown=0, NotChecked=0, Total=930 [2021-10-29 00:03:30,834 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) [2021-10-29 00:03:32,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:03:32,839 INFO L93 Difference]: Finished difference Result 113 states and 118 transitions. [2021-10-29 00:03:32,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-29 00:03:32,848 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 [2021-10-29 00:03:32,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:03:32,849 INFO L225 Difference]: With dead ends: 113 [2021-10-29 00:03:32,849 INFO L226 Difference]: Without dead ends: 113 [2021-10-29 00:03:32,850 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 [2021-10-29 00:03:32,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-10-29 00:03:32,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 109. [2021-10-29 00:03:32,853 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) [2021-10-29 00:03:32,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 114 transitions. [2021-10-29 00:03:32,854 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 114 transitions. Word has length 39 [2021-10-29 00:03:32,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:03:32,855 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 114 transitions. [2021-10-29 00:03:32,855 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) [2021-10-29 00:03:32,855 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 114 transitions. [2021-10-29 00:03:32,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-29 00:03:32,856 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:03:32,856 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] [2021-10-29 00:03:32,885 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-10-29 00:03:33,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-29 00:03:33,069 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)] === [2021-10-29 00:03:33,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:03:33,070 INFO L85 PathProgramCache]: Analyzing trace with hash 90145800, now seen corresponding path program 1 times [2021-10-29 00:03:33,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:03:33,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35081227] [2021-10-29 00:03:33,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:03:33,070 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:03:33,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:03:33,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-29 00:03:33,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:03:33,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-29 00:03:33,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:03:33,379 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-29 00:03:33,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:03:33,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35081227] [2021-10-29 00:03:33,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35081227] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 00:03:33,380 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 00:03:33,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-10-29 00:03:33,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020758680] [2021-10-29 00:03:33,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-29 00:03:33,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:03:33,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-29 00:03:33,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-10-29 00:03:33,382 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) [2021-10-29 00:03:34,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:03:34,133 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2021-10-29 00:03:34,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-29 00:03:34,133 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 [2021-10-29 00:03:34,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:03:34,134 INFO L225 Difference]: With dead ends: 104 [2021-10-29 00:03:34,134 INFO L226 Difference]: Without dead ends: 104 [2021-10-29 00:03:34,135 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 [2021-10-29 00:03:34,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-10-29 00:03:34,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2021-10-29 00:03:34,139 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) [2021-10-29 00:03:34,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 109 transitions. [2021-10-29 00:03:34,140 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 109 transitions. Word has length 39 [2021-10-29 00:03:34,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:03:34,142 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 109 transitions. [2021-10-29 00:03:34,142 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) [2021-10-29 00:03:34,142 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 109 transitions. [2021-10-29 00:03:34,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-29 00:03:34,143 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:03:34,143 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] [2021-10-29 00:03:34,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-29 00:03:34,144 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)] === [2021-10-29 00:03:34,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:03:34,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1501617162, now seen corresponding path program 1 times [2021-10-29 00:03:34,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:03:34,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413281288] [2021-10-29 00:03:34,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:03:34,145 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:03:34,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:03:34,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-29 00:03:34,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:03:34,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-29 00:03:34,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:03:34,508 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:03:34,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:03:34,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413281288] [2021-10-29 00:03:34,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413281288] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:03:34,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193277202] [2021-10-29 00:03:34,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:03:34,509 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:03:34,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:03:34,516 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:03:34,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-29 00:03:34,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:03:34,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 49 conjunts are in the unsatisfiable core [2021-10-29 00:03:34,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:03:34,774 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 [2021-10-29 00:03:34,836 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-10-29 00:03:34,837 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 [2021-10-29 00:03:34,913 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 [2021-10-29 00:03:35,004 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-29 00:03:35,005 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 [2021-10-29 00:03:35,192 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-10-29 00:03:35,193 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 [2021-10-29 00:03:35,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 00:03:35,301 INFO L354 Elim1Store]: treesize reduction 102, result has 14.3 percent of original size [2021-10-29 00:03:35,301 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 [2021-10-29 00:03:36,004 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-10-29 00:03:36,005 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 [2021-10-29 00:03:36,279 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:03:36,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193277202] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:03:36,279 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 00:03:36,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 32 [2021-10-29 00:03:36,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274908825] [2021-10-29 00:03:36,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-29 00:03:36,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:03:36,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-29 00:03:36,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2021-10-29 00:03:36,282 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) [2021-10-29 00:03:38,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:03:38,103 INFO L93 Difference]: Finished difference Result 107 states and 112 transitions. [2021-10-29 00:03:38,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-29 00:03:38,106 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 [2021-10-29 00:03:38,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:03:38,107 INFO L225 Difference]: With dead ends: 107 [2021-10-29 00:03:38,107 INFO L226 Difference]: Without dead ends: 107 [2021-10-29 00:03:38,108 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=253, Invalid=2003, Unknown=0, NotChecked=0, Total=2256 [2021-10-29 00:03:38,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-10-29 00:03:38,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 103. [2021-10-29 00:03:38,111 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) [2021-10-29 00:03:38,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 108 transitions. [2021-10-29 00:03:38,112 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 108 transitions. Word has length 40 [2021-10-29 00:03:38,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:03:38,112 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 108 transitions. [2021-10-29 00:03:38,112 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) [2021-10-29 00:03:38,113 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 108 transitions. [2021-10-29 00:03:38,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-29 00:03:38,113 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:03:38,114 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] [2021-10-29 00:03:38,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-29 00:03:38,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-29 00:03:38,324 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)] === [2021-10-29 00:03:38,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:03:38,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1500447370, now seen corresponding path program 1 times [2021-10-29 00:03:38,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:03:38,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694181163] [2021-10-29 00:03:38,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:03:38,325 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:03:38,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:03:38,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-29 00:03:38,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:03:38,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-29 00:03:38,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:03:38,595 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-29 00:03:38,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:03:38,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694181163] [2021-10-29 00:03:38,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694181163] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 00:03:38,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 00:03:38,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-10-29 00:03:38,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456224538] [2021-10-29 00:03:38,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-29 00:03:38,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:03:38,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-29 00:03:38,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-10-29 00:03:38,598 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) [2021-10-29 00:03:39,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:03:39,112 INFO L93 Difference]: Finished difference Result 102 states and 107 transitions. [2021-10-29 00:03:39,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-29 00:03:39,113 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 [2021-10-29 00:03:39,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:03:39,113 INFO L225 Difference]: With dead ends: 102 [2021-10-29 00:03:39,113 INFO L226 Difference]: Without dead ends: 102 [2021-10-29 00:03:39,114 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 [2021-10-29 00:03:39,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-10-29 00:03:39,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2021-10-29 00:03:39,116 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) [2021-10-29 00:03:39,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 107 transitions. [2021-10-29 00:03:39,117 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 107 transitions. Word has length 40 [2021-10-29 00:03:39,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:03:39,117 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 107 transitions. [2021-10-29 00:03:39,118 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) [2021-10-29 00:03:39,118 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 107 transitions. [2021-10-29 00:03:39,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-29 00:03:39,119 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:03:39,119 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] [2021-10-29 00:03:39,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-10-29 00:03:39,119 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)] === [2021-10-29 00:03:39,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:03:39,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1505910075, now seen corresponding path program 1 times [2021-10-29 00:03:39,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:03:39,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585423509] [2021-10-29 00:03:39,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:03:39,121 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:03:39,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:03:39,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-29 00:03:39,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:03:39,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-29 00:03:39,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:03:39,499 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:03:39,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:03:39,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585423509] [2021-10-29 00:03:39,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585423509] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:03:39,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378865572] [2021-10-29 00:03:39,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:03:39,500 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:03:39,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:03:39,507 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:03:39,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-29 00:03:39,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:03:39,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-29 00:03:39,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:03:39,913 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-29 00:03:39,914 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 [2021-10-29 00:03:39,980 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 [2021-10-29 00:03:40,190 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 00:03:40,191 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 [2021-10-29 00:03:40,537 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-29 00:03:40,538 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 [2021-10-29 00:03:40,600 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:03:40,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378865572] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:03:40,601 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 00:03:40,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 28 [2021-10-29 00:03:40,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001049687] [2021-10-29 00:03:40,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-29 00:03:40,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:03:40,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-29 00:03:40,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=740, Unknown=0, NotChecked=0, Total=812 [2021-10-29 00:03:40,605 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) [2021-10-29 00:03:41,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:03:41,701 INFO L93 Difference]: Finished difference Result 101 states and 106 transitions. [2021-10-29 00:03:41,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-29 00:03:41,701 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 [2021-10-29 00:03:41,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:03:41,702 INFO L225 Difference]: With dead ends: 101 [2021-10-29 00:03:41,702 INFO L226 Difference]: Without dead ends: 101 [2021-10-29 00:03:41,703 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=169, Invalid=1391, Unknown=0, NotChecked=0, Total=1560 [2021-10-29 00:03:41,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-10-29 00:03:41,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-10-29 00:03:41,706 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) [2021-10-29 00:03:41,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 106 transitions. [2021-10-29 00:03:41,707 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 106 transitions. Word has length 43 [2021-10-29 00:03:41,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:03:41,707 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 106 transitions. [2021-10-29 00:03:41,707 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) [2021-10-29 00:03:41,707 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 106 transitions. [2021-10-29 00:03:41,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-29 00:03:41,708 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:03:41,708 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] [2021-10-29 00:03:41,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-29 00:03:41,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:03:41,909 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)] === [2021-10-29 00:03:41,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:03:41,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1506341051, now seen corresponding path program 1 times [2021-10-29 00:03:41,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:03:41,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071161645] [2021-10-29 00:03:41,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:03:41,909 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:03:41,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:03:42,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-29 00:03:42,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:03:42,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-29 00:03:42,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:03:42,338 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:03:42,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:03:42,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071161645] [2021-10-29 00:03:42,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071161645] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:03:42,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924040145] [2021-10-29 00:03:42,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:03:42,339 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:03:42,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:03:42,343 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:03:42,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-29 00:03:42,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:03:42,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-29 00:03:42,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:03:42,669 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 [2021-10-29 00:03:42,742 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-29 00:03:42,742 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 [2021-10-29 00:03:42,804 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-10-29 00:03:42,805 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 [2021-10-29 00:03:42,839 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 [2021-10-29 00:03:42,891 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-29 00:03:42,891 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 [2021-10-29 00:03:43,052 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-10-29 00:03:43,053 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 [2021-10-29 00:03:43,162 INFO L354 Elim1Store]: treesize reduction 116, result has 20.5 percent of original size [2021-10-29 00:03:43,162 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 [2021-10-29 00:03:46,185 INFO L354 Elim1Store]: treesize reduction 104, result has 21.8 percent of original size [2021-10-29 00:03:46,187 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 [2021-10-29 00:03:46,925 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-29 00:03:46,926 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 [2021-10-29 00:03:47,016 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:03:47,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924040145] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:03:47,017 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 00:03:47,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 34 [2021-10-29 00:03:47,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236968070] [2021-10-29 00:03:47,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-29 00:03:47,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:03:47,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-29 00:03:47,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1111, Unknown=0, NotChecked=0, Total=1190 [2021-10-29 00:03:47,025 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) [2021-10-29 00:04:15,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:04:15,845 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2021-10-29 00:04:15,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-29 00:04:15,845 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 [2021-10-29 00:04:15,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:04:15,846 INFO L225 Difference]: With dead ends: 104 [2021-10-29 00:04:15,846 INFO L226 Difference]: Without dead ends: 104 [2021-10-29 00:04:15,847 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=338, Invalid=2963, Unknown=5, NotChecked=0, Total=3306 [2021-10-29 00:04:15,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-10-29 00:04:15,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2021-10-29 00:04:15,850 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) [2021-10-29 00:04:15,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 105 transitions. [2021-10-29 00:04:15,851 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 105 transitions. Word has length 43 [2021-10-29 00:04:15,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:04:15,851 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 105 transitions. [2021-10-29 00:04:15,852 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) [2021-10-29 00:04:15,852 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 105 transitions. [2021-10-29 00:04:15,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-10-29 00:04:15,853 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:04:15,853 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] [2021-10-29 00:04:15,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-29 00:04:16,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:04:16,060 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)] === [2021-10-29 00:04:16,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:04:16,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1240568634, now seen corresponding path program 1 times [2021-10-29 00:04:16,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:04:16,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662057183] [2021-10-29 00:04:16,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:04:16,061 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:04:16,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:04:16,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-29 00:04:16,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:04:16,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-29 00:04:16,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:04:16,702 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:04:16,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:04:16,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662057183] [2021-10-29 00:04:16,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662057183] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:04:16,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209421414] [2021-10-29 00:04:16,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:04:16,703 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:04:16,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:04:16,704 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:04:16,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-29 00:04:17,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:04:17,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 56 conjunts are in the unsatisfiable core [2021-10-29 00:04:17,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:04:17,056 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 [2021-10-29 00:04:17,094 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-29 00:04:17,094 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 [2021-10-29 00:04:17,195 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-10-29 00:04:17,195 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 [2021-10-29 00:04:17,231 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 [2021-10-29 00:04:17,280 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-29 00:04:17,280 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 [2021-10-29 00:04:17,448 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-10-29 00:04:17,449 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 [2021-10-29 00:04:17,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 00:04:17,593 INFO L354 Elim1Store]: treesize reduction 102, result has 14.3 percent of original size [2021-10-29 00:04:17,593 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 [2021-10-29 00:04:18,359 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-10-29 00:04:18,359 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 [2021-10-29 00:04:18,419 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-29 00:04:18,420 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 [2021-10-29 00:04:18,503 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:04:18,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209421414] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:04:18,503 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 00:04:18,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 22] total 39 [2021-10-29 00:04:18,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240950013] [2021-10-29 00:04:18,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-10-29 00:04:18,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:04:18,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-10-29 00:04:18,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2021-10-29 00:04:18,508 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) [2021-10-29 00:04:20,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:04:20,832 INFO L93 Difference]: Finished difference Result 101 states and 106 transitions. [2021-10-29 00:04:20,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-29 00:04:20,833 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 [2021-10-29 00:04:20,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:04:20,834 INFO L225 Difference]: With dead ends: 101 [2021-10-29 00:04:20,834 INFO L226 Difference]: Without dead ends: 101 [2021-10-29 00:04:20,835 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 [2021-10-29 00:04:20,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-10-29 00:04:20,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 97. [2021-10-29 00:04:20,838 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) [2021-10-29 00:04:20,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 102 transitions. [2021-10-29 00:04:20,839 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 102 transitions. Word has length 44 [2021-10-29 00:04:20,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:04:20,839 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 102 transitions. [2021-10-29 00:04:20,839 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) [2021-10-29 00:04:20,839 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 102 transitions. [2021-10-29 00:04:20,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-10-29 00:04:20,840 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:04:20,840 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] [2021-10-29 00:04:20,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-29 00:04:21,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:04:21,048 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)] === [2021-10-29 00:04:21,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:04:21,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1240137658, now seen corresponding path program 1 times [2021-10-29 00:04:21,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:04:21,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594710921] [2021-10-29 00:04:21,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:04:21,049 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:04:21,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:04:21,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-29 00:04:21,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:04:21,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-29 00:04:21,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:04:21,455 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:04:21,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:04:21,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594710921] [2021-10-29 00:04:21,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594710921] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:04:21,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412360917] [2021-10-29 00:04:21,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:04:21,456 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:04:21,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:04:21,460 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:04:21,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-29 00:04:21,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:04:21,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-29 00:04:21,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:04:21,901 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 [2021-10-29 00:04:21,973 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-29 00:04:21,973 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 [2021-10-29 00:04:22,060 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-10-29 00:04:22,061 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 [2021-10-29 00:04:22,089 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 [2021-10-29 00:04:22,132 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-29 00:04:22,132 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 [2021-10-29 00:04:22,253 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-10-29 00:04:22,253 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 [2021-10-29 00:04:22,349 INFO L354 Elim1Store]: treesize reduction 116, result has 20.5 percent of original size [2021-10-29 00:04:22,349 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 [2021-10-29 00:04:25,934 INFO L354 Elim1Store]: treesize reduction 104, result has 21.8 percent of original size [2021-10-29 00:04:25,934 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 [2021-10-29 00:04:26,165 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-29 00:04:26,166 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 [2021-10-29 00:04:26,413 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:04:26,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412360917] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:04:26,413 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 00:04:26,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-10-29 00:04:26,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755619302] [2021-10-29 00:04:26,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-10-29 00:04:26,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:04:26,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-10-29 00:04:26,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1453, Unknown=2, NotChecked=0, Total=1560 [2021-10-29 00:04:26,416 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) [2021-10-29 00:04:49,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:04:49,266 INFO L93 Difference]: Finished difference Result 100 states and 105 transitions. [2021-10-29 00:04:49,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-29 00:04:49,266 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 [2021-10-29 00:04:49,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:04:49,267 INFO L225 Difference]: With dead ends: 100 [2021-10-29 00:04:49,267 INFO L226 Difference]: Without dead ends: 100 [2021-10-29 00:04:49,268 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=399, Invalid=3625, Unknown=8, NotChecked=0, Total=4032 [2021-10-29 00:04:49,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-10-29 00:04:49,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2021-10-29 00:04:49,270 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) [2021-10-29 00:04:49,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 101 transitions. [2021-10-29 00:04:49,271 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 101 transitions. Word has length 44 [2021-10-29 00:04:49,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:04:49,271 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 101 transitions. [2021-10-29 00:04:49,271 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) [2021-10-29 00:04:49,271 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 101 transitions. [2021-10-29 00:04:49,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-10-29 00:04:49,272 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:04:49,272 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] [2021-10-29 00:04:49,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-29 00:04:49,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:04:49,473 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)] === [2021-10-29 00:04:49,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:04:49,473 INFO L85 PathProgramCache]: Analyzing trace with hash -762542534, now seen corresponding path program 1 times [2021-10-29 00:04:49,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:04:49,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298649129] [2021-10-29 00:04:49,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:04:49,474 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:04:49,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:04:49,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-29 00:04:49,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:04:49,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-29 00:04:49,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:04:50,158 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:04:50,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:04:50,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298649129] [2021-10-29 00:04:50,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298649129] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:04:50,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147504973] [2021-10-29 00:04:50,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:04:50,159 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:04:50,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:04:50,160 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:04:50,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-29 00:04:50,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:04:50,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 56 conjunts are in the unsatisfiable core [2021-10-29 00:04:50,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:04:50,647 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 [2021-10-29 00:04:50,695 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-29 00:04:50,696 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 [2021-10-29 00:04:50,818 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-10-29 00:04:50,819 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 [2021-10-29 00:04:50,857 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 [2021-10-29 00:04:50,917 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-29 00:04:50,917 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 [2021-10-29 00:04:51,160 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-10-29 00:04:51,160 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 [2021-10-29 00:04:51,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 00:04:51,283 INFO L354 Elim1Store]: treesize reduction 102, result has 14.3 percent of original size [2021-10-29 00:04:51,284 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 [2021-10-29 00:04:52,105 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-10-29 00:04:52,105 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 [2021-10-29 00:04:52,145 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-29 00:04:52,145 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 [2021-10-29 00:04:52,209 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:04:52,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147504973] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:04:52,209 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 00:04:52,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 22] total 38 [2021-10-29 00:04:52,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450655637] [2021-10-29 00:04:52,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-10-29 00:04:52,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:04:52,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-10-29 00:04:52,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1376, Unknown=0, NotChecked=0, Total=1482 [2021-10-29 00:04:52,212 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) [2021-10-29 00:04:54,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:04:54,478 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2021-10-29 00:04:54,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-29 00:04:54,479 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 [2021-10-29 00:04:54,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:04:54,480 INFO L225 Difference]: With dead ends: 99 [2021-10-29 00:04:54,480 INFO L226 Difference]: Without dead ends: 99 [2021-10-29 00:04:54,481 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=325, Invalid=2981, Unknown=0, NotChecked=0, Total=3306 [2021-10-29 00:04:54,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-10-29 00:04:54,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2021-10-29 00:04:54,487 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) [2021-10-29 00:04:54,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 100 transitions. [2021-10-29 00:04:54,487 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 100 transitions. Word has length 44 [2021-10-29 00:04:54,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:04:54,488 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 100 transitions. [2021-10-29 00:04:54,488 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) [2021-10-29 00:04:54,488 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 100 transitions. [2021-10-29 00:04:54,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-10-29 00:04:54,488 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:04:54,488 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] [2021-10-29 00:04:54,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-29 00:04:54,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:04:54,689 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)] === [2021-10-29 00:04:54,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:04:54,690 INFO L85 PathProgramCache]: Analyzing trace with hash -762973510, now seen corresponding path program 1 times [2021-10-29 00:04:54,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:04:54,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221686188] [2021-10-29 00:04:54,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:04:54,690 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:04:54,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:04:54,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-29 00:04:54,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:04:54,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-29 00:04:54,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:04:55,007 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:04:55,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:04:55,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221686188] [2021-10-29 00:04:55,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221686188] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:04:55,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900026059] [2021-10-29 00:04:55,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:04:55,008 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:04:55,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:04:55,016 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:04:55,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-29 00:04:55,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:04:55,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-29 00:04:55,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:04:55,530 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-29 00:04:55,530 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 [2021-10-29 00:04:55,576 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 [2021-10-29 00:04:55,704 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 00:04:55,704 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 [2021-10-29 00:04:55,874 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-29 00:04:55,874 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 [2021-10-29 00:04:56,052 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:04:56,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900026059] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:04:56,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 00:04:56,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 27 [2021-10-29 00:04:56,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907321529] [2021-10-29 00:04:56,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-29 00:04:56,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:04:56,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-29 00:04:56,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-10-29 00:04:56,054 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) [2021-10-29 00:04:56,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:04:56,928 INFO L93 Difference]: Finished difference Result 94 states and 99 transitions. [2021-10-29 00:04:56,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-29 00:04:56,928 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 [2021-10-29 00:04:56,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:04:56,929 INFO L225 Difference]: With dead ends: 94 [2021-10-29 00:04:56,929 INFO L226 Difference]: Without dead ends: 94 [2021-10-29 00:04:56,930 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 [2021-10-29 00:04:56,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-10-29 00:04:56,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-10-29 00:04:56,931 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) [2021-10-29 00:04:56,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 99 transitions. [2021-10-29 00:04:56,932 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 99 transitions. Word has length 44 [2021-10-29 00:04:56,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:04:56,932 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 99 transitions. [2021-10-29 00:04:56,932 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) [2021-10-29 00:04:56,932 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 99 transitions. [2021-10-29 00:04:56,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-29 00:04:56,933 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:04:56,933 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] [2021-10-29 00:04:56,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-29 00:04:57,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-29 00:04:57,133 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)] === [2021-10-29 00:04:57,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:04:57,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1633566043, now seen corresponding path program 1 times [2021-10-29 00:04:57,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:04:57,134 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211376045] [2021-10-29 00:04:57,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:04:57,134 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:04:57,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:04:57,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-29 00:04:57,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:04:57,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-29 00:04:57,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:04:57,840 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:04:57,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:04:57,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211376045] [2021-10-29 00:04:57,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211376045] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:04:57,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300234045] [2021-10-29 00:04:57,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:04:57,840 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:04:57,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:04:57,841 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:04:57,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-29 00:04:58,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:04:58,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 49 conjunts are in the unsatisfiable core [2021-10-29 00:04:58,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:04:58,366 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 [2021-10-29 00:04:58,398 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-29 00:04:58,398 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 [2021-10-29 00:04:58,493 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-10-29 00:04:58,494 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 [2021-10-29 00:04:58,526 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 [2021-10-29 00:04:58,570 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-29 00:04:58,570 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 [2021-10-29 00:04:58,778 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-10-29 00:04:58,779 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 [2021-10-29 00:04:58,879 INFO L354 Elim1Store]: treesize reduction 94, result has 15.3 percent of original size [2021-10-29 00:04:58,879 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 [2021-10-29 00:04:59,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 00:04:59,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 00:04:59,605 INFO L354 Elim1Store]: treesize reduction 124, result has 16.8 percent of original size [2021-10-29 00:04:59,605 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 [2021-10-29 00:05:00,250 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-29 00:05:00,250 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 [2021-10-29 00:05:00,404 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-10-29 00:05:00,405 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 [2021-10-29 00:05:00,524 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:05:00,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300234045] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:05:00,525 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 00:05:00,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24] total 43 [2021-10-29 00:05:00,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053238827] [2021-10-29 00:05:00,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-10-29 00:05:00,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:05:00,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-10-29 00:05:00,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1779, Unknown=0, NotChecked=0, Total=1892 [2021-10-29 00:05:00,528 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) [2021-10-29 00:05:03,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:05:03,933 INFO L93 Difference]: Finished difference Result 96 states and 101 transitions. [2021-10-29 00:05:03,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-29 00:05:03,934 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 [2021-10-29 00:05:03,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:05:03,934 INFO L225 Difference]: With dead ends: 96 [2021-10-29 00:05:03,935 INFO L226 Difference]: Without dead ends: 96 [2021-10-29 00:05:03,936 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 726 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=375, Invalid=4047, Unknown=0, NotChecked=0, Total=4422 [2021-10-29 00:05:03,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-10-29 00:05:03,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2021-10-29 00:05:03,939 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) [2021-10-29 00:05:03,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 97 transitions. [2021-10-29 00:05:03,940 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 97 transitions. Word has length 46 [2021-10-29 00:05:03,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:05:03,940 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 97 transitions. [2021-10-29 00:05:03,941 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) [2021-10-29 00:05:03,941 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 97 transitions. [2021-10-29 00:05:03,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-29 00:05:03,941 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:05:03,942 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] [2021-10-29 00:05:03,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-29 00:05:04,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-29 00:05:04,148 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)] === [2021-10-29 00:05:04,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:05:04,149 INFO L85 PathProgramCache]: Analyzing trace with hash -413294311, now seen corresponding path program 1 times [2021-10-29 00:05:04,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:05:04,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849158700] [2021-10-29 00:05:04,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:05:04,149 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:05:04,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:05:04,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-29 00:05:04,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:05:04,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-29 00:05:04,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:05:04,756 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:05:04,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:05:04,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849158700] [2021-10-29 00:05:04,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849158700] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:05:04,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961305559] [2021-10-29 00:05:04,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:05:04,756 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:05:04,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:05:04,757 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:05:04,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-29 00:05:05,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:05:05,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 45 conjunts are in the unsatisfiable core [2021-10-29 00:05:05,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:05:05,332 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 [2021-10-29 00:05:05,407 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-29 00:05:05,407 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 [2021-10-29 00:05:05,481 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-10-29 00:05:05,481 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 [2021-10-29 00:05:05,505 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 [2021-10-29 00:05:05,584 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-29 00:05:05,584 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 [2021-10-29 00:05:05,716 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-10-29 00:05:05,716 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 [2021-10-29 00:05:05,794 INFO L354 Elim1Store]: treesize reduction 94, result has 15.3 percent of original size [2021-10-29 00:05:05,795 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 [2021-10-29 00:05:06,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 00:05:06,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 00:05:06,383 INFO L354 Elim1Store]: treesize reduction 124, result has 16.8 percent of original size [2021-10-29 00:05:06,383 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 [2021-10-29 00:05:06,753 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-29 00:05:06,754 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 [2021-10-29 00:05:07,222 INFO L354 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2021-10-29 00:05:07,222 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 [2021-10-29 00:05:07,927 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:05:07,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961305559] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:05:07,928 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 00:05:07,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 44 [2021-10-29 00:05:07,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453796661] [2021-10-29 00:05:07,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-10-29 00:05:07,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:05:07,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-10-29 00:05:07,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1848, Unknown=0, NotChecked=0, Total=1980 [2021-10-29 00:05:07,930 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) [2021-10-29 00:05:10,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:05:10,793 INFO L93 Difference]: Finished difference Result 94 states and 99 transitions. [2021-10-29 00:05:10,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-29 00:05:10,794 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 [2021-10-29 00:05:10,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:05:10,794 INFO L225 Difference]: With dead ends: 94 [2021-10-29 00:05:10,794 INFO L226 Difference]: Without dead ends: 94 [2021-10-29 00:05:10,796 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=442, Invalid=4388, Unknown=0, NotChecked=0, Total=4830 [2021-10-29 00:05:10,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-10-29 00:05:10,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2021-10-29 00:05:10,798 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) [2021-10-29 00:05:10,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2021-10-29 00:05:10,798 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 47 [2021-10-29 00:05:10,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:05:10,799 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2021-10-29 00:05:10,799 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) [2021-10-29 00:05:10,799 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2021-10-29 00:05:10,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-10-29 00:05:10,800 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:05:10,800 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] [2021-10-29 00:05:10,849 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-10-29 00:05:11,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-29 00:05:11,028 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)] === [2021-10-29 00:05:11,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:05:11,029 INFO L85 PathProgramCache]: Analyzing trace with hash 491836438, now seen corresponding path program 1 times [2021-10-29 00:05:11,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:05:11,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981864556] [2021-10-29 00:05:11,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:05:11,029 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:05:11,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:05:11,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-29 00:05:11,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:05:11,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-29 00:05:11,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:05:11,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-10-29 00:05:11,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:05:12,432 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:05:12,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:05:12,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981864556] [2021-10-29 00:05:12,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981864556] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:05:12,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855354503] [2021-10-29 00:05:12,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:05:12,433 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:05:12,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:05:12,436 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:05:12,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-29 00:05:13,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:05:13,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 50 conjunts are in the unsatisfiable core [2021-10-29 00:05:13,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:05:13,155 INFO L354 Elim1Store]: treesize reduction 34, result has 30.6 percent of original size [2021-10-29 00:05:13,155 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 [2021-10-29 00:05:13,318 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-10-29 00:05:13,318 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 [2021-10-29 00:05:13,444 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 [2021-10-29 00:05:13,545 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-29 00:05:13,545 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 [2021-10-29 00:05:13,795 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-10-29 00:05:13,796 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 [2021-10-29 00:05:13,918 INFO L354 Elim1Store]: treesize reduction 94, result has 15.3 percent of original size [2021-10-29 00:05:13,918 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 [2021-10-29 00:05:14,413 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-10-29 00:05:14,414 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 [2021-10-29 00:05:14,418 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-10-29 00:05:14,418 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 [2021-10-29 00:05:19,104 INFO L354 Elim1Store]: treesize reduction 348, result has 32.9 percent of original size [2021-10-29 00:05:19,104 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 [2021-10-29 00:05:19,154 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-10-29 00:05:19,155 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 [2021-10-29 00:05:24,358 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:05:24,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855354503] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:05:24,358 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 00:05:24,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25] total 50 [2021-10-29 00:05:24,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604663355] [2021-10-29 00:05:24,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-10-29 00:05:24,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:05:24,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-10-29 00:05:24,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2411, Unknown=0, NotChecked=0, Total=2550 [2021-10-29 00:05:24,360 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) [2021-10-29 00:05:39,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:05:39,469 INFO L93 Difference]: Finished difference Result 160 states and 172 transitions. [2021-10-29 00:05:39,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-10-29 00:05:39,469 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 [2021-10-29 00:05:39,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:05:39,472 INFO L225 Difference]: With dead ends: 160 [2021-10-29 00:05:39,473 INFO L226 Difference]: Without dead ends: 148 [2021-10-29 00:05:39,476 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2092 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=566, Invalid=8363, Unknown=1, NotChecked=0, Total=8930 [2021-10-29 00:05:39,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-10-29 00:05:39,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 124. [2021-10-29 00:05:39,484 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) [2021-10-29 00:05:39,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 134 transitions. [2021-10-29 00:05:39,486 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 134 transitions. Word has length 50 [2021-10-29 00:05:39,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:05:39,486 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 134 transitions. [2021-10-29 00:05:39,486 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) [2021-10-29 00:05:39,487 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 134 transitions. [2021-10-29 00:05:39,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-10-29 00:05:39,488 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:05:39,488 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] [2021-10-29 00:05:39,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-29 00:05:39,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-29 00:05:39,704 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)] === [2021-10-29 00:05:39,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:05:39,704 INFO L85 PathProgramCache]: Analyzing trace with hash -713295800, now seen corresponding path program 1 times [2021-10-29 00:05:39,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:05:39,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709859996] [2021-10-29 00:05:39,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:05:39,705 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:05:39,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:05:39,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-29 00:05:39,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:05:39,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-29 00:05:39,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:05:40,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-10-29 00:05:40,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:05:41,116 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:05:41,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:05:41,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709859996] [2021-10-29 00:05:41,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709859996] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:05:41,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457817609] [2021-10-29 00:05:41,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:05:41,117 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:05:41,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:05:41,124 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:05:41,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-29 00:05:41,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:05:41,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 50 conjunts are in the unsatisfiable core [2021-10-29 00:05:41,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:05:41,952 INFO L354 Elim1Store]: treesize reduction 34, result has 30.6 percent of original size [2021-10-29 00:05:41,952 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 [2021-10-29 00:05:42,121 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-10-29 00:05:42,121 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 [2021-10-29 00:05:42,224 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 [2021-10-29 00:05:42,331 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-29 00:05:42,331 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 [2021-10-29 00:05:42,613 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-10-29 00:05:42,614 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 [2021-10-29 00:05:42,761 INFO L354 Elim1Store]: treesize reduction 94, result has 15.3 percent of original size [2021-10-29 00:05:42,761 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 [2021-10-29 00:05:43,271 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-10-29 00:05:43,272 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 [2021-10-29 00:05:43,276 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-10-29 00:05:43,277 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 [2021-10-29 00:05:48,710 INFO L354 Elim1Store]: treesize reduction 350, result has 32.6 percent of original size [2021-10-29 00:05:48,710 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 [2021-10-29 00:05:48,754 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-10-29 00:05:48,754 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 [2021-10-29 00:05:49,474 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:05:49,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457817609] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:05:49,474 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 00:05:49,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25] total 50 [2021-10-29 00:05:49,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170485287] [2021-10-29 00:05:49,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-10-29 00:05:49,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:05:49,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-10-29 00:05:49,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=2414, Unknown=0, NotChecked=0, Total=2550 [2021-10-29 00:05:49,476 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) [2021-10-29 00:06:09,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:06:09,246 INFO L93 Difference]: Finished difference Result 159 states and 170 transitions. [2021-10-29 00:06:09,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-10-29 00:06:09,247 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 [2021-10-29 00:06:09,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:06:09,248 INFO L225 Difference]: With dead ends: 159 [2021-10-29 00:06:09,248 INFO L226 Difference]: Without dead ends: 143 [2021-10-29 00:06:09,249 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2113 ImplicationChecksByTransitivity, 22.8s TimeCoverageRelationStatistics Valid=575, Invalid=8736, Unknown=1, NotChecked=0, Total=9312 [2021-10-29 00:06:09,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-10-29 00:06:09,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 120. [2021-10-29 00:06:09,254 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) [2021-10-29 00:06:09,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 129 transitions. [2021-10-29 00:06:09,255 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 129 transitions. Word has length 50 [2021-10-29 00:06:09,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:06:09,255 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 129 transitions. [2021-10-29 00:06:09,255 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) [2021-10-29 00:06:09,256 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 129 transitions. [2021-10-29 00:06:09,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-29 00:06:09,256 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:06:09,257 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] [2021-10-29 00:06:09,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-29 00:06:09,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-29 00:06:09,476 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)] === [2021-10-29 00:06:09,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:06:09,476 INFO L85 PathProgramCache]: Analyzing trace with hash -816818038, now seen corresponding path program 1 times [2021-10-29 00:06:09,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:06:09,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856016358] [2021-10-29 00:06:09,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:06:09,477 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:06:09,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:06:09,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-29 00:06:09,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:06:09,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-29 00:06:09,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:06:10,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-10-29 00:06:10,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:06:11,000 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:06:11,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:06:11,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856016358] [2021-10-29 00:06:11,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856016358] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:06:11,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278155085] [2021-10-29 00:06:11,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:06:11,001 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:06:11,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:06:11,002 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:06:11,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-29 00:06:11,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:06:11,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 56 conjunts are in the unsatisfiable core [2021-10-29 00:06:11,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:06:12,347 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 [2021-10-29 00:06:12,429 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-29 00:06:12,432 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 [2021-10-29 00:06:12,695 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-10-29 00:06:12,695 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 [2021-10-29 00:06:12,861 INFO L354 Elim1Store]: treesize reduction 94, result has 15.3 percent of original size [2021-10-29 00:06:12,861 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 [2021-10-29 00:06:13,386 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-10-29 00:06:13,387 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 [2021-10-29 00:06:15,776 INFO L354 Elim1Store]: treesize reduction 348, result has 32.9 percent of original size [2021-10-29 00:06:15,776 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 [2021-10-29 00:06:17,584 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:06:17,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278155085] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:06:17,585 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 00:06:17,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 53 [2021-10-29 00:06:17,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031410501] [2021-10-29 00:06:17,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-10-29 00:06:17,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:06:17,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-10-29 00:06:17,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=2709, Unknown=0, NotChecked=0, Total=2862 [2021-10-29 00:06:17,586 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) [2021-10-29 00:06:28,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:06:28,463 INFO L93 Difference]: Finished difference Result 156 states and 168 transitions. [2021-10-29 00:06:28,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-29 00:06:28,465 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 [2021-10-29 00:06:28,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:06:28,466 INFO L225 Difference]: With dead ends: 156 [2021-10-29 00:06:28,466 INFO L226 Difference]: Without dead ends: 146 [2021-10-29 00:06:28,467 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1566 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=414, Invalid=6558, Unknown=0, NotChecked=0, Total=6972 [2021-10-29 00:06:28,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-10-29 00:06:28,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 140. [2021-10-29 00:06:28,473 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) [2021-10-29 00:06:28,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 152 transitions. [2021-10-29 00:06:28,474 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 152 transitions. Word has length 51 [2021-10-29 00:06:28,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:06:28,475 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 152 transitions. [2021-10-29 00:06:28,475 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) [2021-10-29 00:06:28,475 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 152 transitions. [2021-10-29 00:06:28,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-29 00:06:28,476 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:06:28,476 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] [2021-10-29 00:06:28,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-29 00:06:28,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:06:28,692 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)] === [2021-10-29 00:06:28,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:06:28,692 INFO L85 PathProgramCache]: Analyzing trace with hash -2021950276, now seen corresponding path program 1 times [2021-10-29 00:06:28,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:06:28,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958878581] [2021-10-29 00:06:28,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:06:28,693 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:06:28,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:06:28,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-29 00:06:28,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:06:28,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-29 00:06:28,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:06:29,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-10-29 00:06:29,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:06:30,289 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:06:30,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:06:30,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958878581] [2021-10-29 00:06:30,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958878581] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:06:30,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271847974] [2021-10-29 00:06:30,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:06:30,291 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:06:30,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:06:30,291 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:06:30,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-29 00:06:31,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:06:31,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 54 conjunts are in the unsatisfiable core [2021-10-29 00:06:31,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:06:31,342 INFO L354 Elim1Store]: treesize reduction 34, result has 30.6 percent of original size [2021-10-29 00:06:31,342 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 [2021-10-29 00:06:31,583 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-10-29 00:06:31,583 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 [2021-10-29 00:06:31,695 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 [2021-10-29 00:06:31,788 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-29 00:06:31,788 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 [2021-10-29 00:06:32,035 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-10-29 00:06:32,036 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 [2021-10-29 00:06:32,184 INFO L354 Elim1Store]: treesize reduction 94, result has 15.3 percent of original size [2021-10-29 00:06:32,184 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 [2021-10-29 00:06:32,675 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-10-29 00:06:32,675 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 [2021-10-29 00:06:32,680 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-10-29 00:06:32,681 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 [2021-10-29 00:06:38,495 INFO L354 Elim1Store]: treesize reduction 348, result has 32.9 percent of original size [2021-10-29 00:06:38,496 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 [2021-10-29 00:06:38,531 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-10-29 00:06:38,531 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 [2021-10-29 00:06:41,372 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:06:41,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271847974] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:06:41,373 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 00:06:41,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 51 [2021-10-29 00:06:41,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838024049] [2021-10-29 00:06:41,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-10-29 00:06:41,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:06:41,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-10-29 00:06:41,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2518, Unknown=0, NotChecked=0, Total=2652 [2021-10-29 00:06:41,374 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) [2021-10-29 00:07:04,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:07:04,068 INFO L93 Difference]: Finished difference Result 172 states and 185 transitions. [2021-10-29 00:07:04,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-10-29 00:07:04,069 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 [2021-10-29 00:07:04,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:07:04,070 INFO L225 Difference]: With dead ends: 172 [2021-10-29 00:07:04,070 INFO L226 Difference]: Without dead ends: 156 [2021-10-29 00:07:04,071 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2106 ImplicationChecksByTransitivity, 26.4s TimeCoverageRelationStatistics Valid=562, Invalid=9140, Unknown=0, NotChecked=0, Total=9702 [2021-10-29 00:07:04,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-10-29 00:07:04,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 141. [2021-10-29 00:07:04,078 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) [2021-10-29 00:07:04,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 153 transitions. [2021-10-29 00:07:04,079 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 153 transitions. Word has length 51 [2021-10-29 00:07:04,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:07:04,080 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 153 transitions. [2021-10-29 00:07:04,080 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) [2021-10-29 00:07:04,080 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 153 transitions. [2021-10-29 00:07:04,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-29 00:07:04,081 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:07:04,081 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] [2021-10-29 00:07:04,115 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-10-29 00:07:04,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-10-29 00:07:04,296 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)] === [2021-10-29 00:07:04,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:07:04,296 INFO L85 PathProgramCache]: Analyzing trace with hash 539653616, now seen corresponding path program 1 times [2021-10-29 00:07:04,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:07:04,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889638692] [2021-10-29 00:07:04,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:07:04,297 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:07:04,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:07:04,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-29 00:07:04,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:07:04,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-29 00:07:04,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:07:05,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-10-29 00:07:05,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:07:05,907 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:07:05,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:07:05,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889638692] [2021-10-29 00:07:05,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889638692] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:07:05,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484370991] [2021-10-29 00:07:05,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:07:05,908 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:07:05,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:07:05,909 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:07:05,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-29 00:07:06,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:07:06,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 54 conjunts are in the unsatisfiable core [2021-10-29 00:07:06,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:07:07,076 INFO L354 Elim1Store]: treesize reduction 34, result has 30.6 percent of original size [2021-10-29 00:07:07,076 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 [2021-10-29 00:07:07,324 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-10-29 00:07:07,325 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 [2021-10-29 00:07:07,479 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 [2021-10-29 00:07:07,572 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-29 00:07:07,572 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 [2021-10-29 00:07:07,871 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-10-29 00:07:07,871 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 [2021-10-29 00:07:08,016 INFO L354 Elim1Store]: treesize reduction 94, result has 15.3 percent of original size [2021-10-29 00:07:08,016 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 [2021-10-29 00:07:08,576 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-10-29 00:07:08,576 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 [2021-10-29 00:07:08,592 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-10-29 00:07:08,592 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 [2021-10-29 00:07:13,837 INFO L354 Elim1Store]: treesize reduction 350, result has 32.6 percent of original size [2021-10-29 00:07:13,837 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 [2021-10-29 00:07:13,883 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-10-29 00:07:13,884 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 [2021-10-29 00:07:56,619 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:07:56,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484370991] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:07:56,619 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 00:07:56,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 51 [2021-10-29 00:07:56,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990717799] [2021-10-29 00:07:56,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-10-29 00:07:56,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:07:56,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-10-29 00:07:56,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2518, Unknown=0, NotChecked=0, Total=2652 [2021-10-29 00:07:56,621 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) [2021-10-29 00:08:16,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:08:16,727 INFO L93 Difference]: Finished difference Result 169 states and 181 transitions. [2021-10-29 00:08:16,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-10-29 00:08:16,728 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 [2021-10-29 00:08:16,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:08:16,730 INFO L225 Difference]: With dead ends: 169 [2021-10-29 00:08:16,730 INFO L226 Difference]: Without dead ends: 157 [2021-10-29 00:08:16,732 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 23.0s TimeCoverageRelationStatistics Valid=564, Invalid=9138, Unknown=0, NotChecked=0, Total=9702 [2021-10-29 00:08:16,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-10-29 00:08:16,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 145. [2021-10-29 00:08:16,739 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) [2021-10-29 00:08:16,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 157 transitions. [2021-10-29 00:08:16,740 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 157 transitions. Word has length 51 [2021-10-29 00:08:16,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:08:16,741 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 157 transitions. [2021-10-29 00:08:16,741 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) [2021-10-29 00:08:16,741 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 157 transitions. [2021-10-29 00:08:16,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-29 00:08:16,742 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:08:16,743 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] [2021-10-29 00:08:16,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-29 00:08:16,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-10-29 00:08:16,956 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)] === [2021-10-29 00:08:16,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:08:16,956 INFO L85 PathProgramCache]: Analyzing trace with hash -665478622, now seen corresponding path program 1 times [2021-10-29 00:08:16,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:08:16,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678293268] [2021-10-29 00:08:16,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:08:16,957 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:08:16,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:08:17,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-29 00:08:17,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:08:17,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-29 00:08:17,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:08:18,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-10-29 00:08:18,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:08:19,008 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:08:19,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:08:19,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678293268] [2021-10-29 00:08:19,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678293268] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:08:19,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879262526] [2021-10-29 00:08:19,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:08:19,009 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:08:19,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:08:19,011 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:08:19,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-29 00:08:20,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:08:20,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 50 conjunts are in the unsatisfiable core [2021-10-29 00:08:20,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:08:20,529 INFO L354 Elim1Store]: treesize reduction 34, result has 30.6 percent of original size [2021-10-29 00:08:20,530 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 [2021-10-29 00:08:20,763 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-10-29 00:08:20,763 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 [2021-10-29 00:08:20,911 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 [2021-10-29 00:08:21,033 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-29 00:08:21,033 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 [2021-10-29 00:08:21,356 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-10-29 00:08:21,357 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 [2021-10-29 00:08:21,541 INFO L354 Elim1Store]: treesize reduction 94, result has 15.3 percent of original size [2021-10-29 00:08:21,541 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 [2021-10-29 00:08:22,187 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-10-29 00:08:22,188 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 [2021-10-29 00:08:22,196 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-10-29 00:08:22,196 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 [2021-10-29 00:08:30,241 INFO L354 Elim1Store]: treesize reduction 348, result has 32.9 percent of original size [2021-10-29 00:08:30,241 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 [2021-10-29 00:08:30,283 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-10-29 00:08:30,283 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 [2021-10-29 00:08:36,112 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:08:36,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879262526] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:08:36,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 00:08:36,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25] total 50 [2021-10-29 00:08:36,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550224089] [2021-10-29 00:08:36,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-10-29 00:08:36,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:08:36,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-10-29 00:08:36,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=2419, Unknown=0, NotChecked=0, Total=2550 [2021-10-29 00:08:36,116 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) [2021-10-29 00:08:56,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:08:56,457 INFO L93 Difference]: Finished difference Result 164 states and 173 transitions. [2021-10-29 00:08:56,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-10-29 00:08:56,458 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 [2021-10-29 00:08:56,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:08:56,459 INFO L225 Difference]: With dead ends: 164 [2021-10-29 00:08:56,459 INFO L226 Difference]: Without dead ends: 134 [2021-10-29 00:08:56,461 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2094 ImplicationChecksByTransitivity, 25.3s TimeCoverageRelationStatistics Valid=562, Invalid=8944, Unknown=0, NotChecked=0, Total=9506 [2021-10-29 00:08:56,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-10-29 00:08:56,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 125. [2021-10-29 00:08:56,466 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) [2021-10-29 00:08:56,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 133 transitions. [2021-10-29 00:08:56,467 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 133 transitions. Word has length 51 [2021-10-29 00:08:56,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:08:56,468 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 133 transitions. [2021-10-29 00:08:56,468 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) [2021-10-29 00:08:56,468 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 133 transitions. [2021-10-29 00:08:56,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-10-29 00:08:56,469 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:08:56,469 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] [2021-10-29 00:08:56,521 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-10-29 00:08:56,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:08:56,696 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)] === [2021-10-29 00:08:56,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:08:56,697 INFO L85 PathProgramCache]: Analyzing trace with hash 61109274, now seen corresponding path program 2 times [2021-10-29 00:08:56,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:08:56,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406464925] [2021-10-29 00:08:56,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:08:56,697 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:08:56,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:08:56,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-29 00:08:56,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:08:56,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-29 00:08:56,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:08:56,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-10-29 00:08:56,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:08:56,858 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:08:56,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:08:56,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406464925] [2021-10-29 00:08:56,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406464925] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:08:56,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390976436] [2021-10-29 00:08:56,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-29 00:08:56,859 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:08:56,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:08:56,861 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:08:56,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-29 00:08:58,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-29 00:08:58,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-29 00:08:58,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-29 00:08:58,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:08:58,596 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:08:58,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390976436] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:08:58,597 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 00:08:58,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 11 [2021-10-29 00:08:58,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380630170] [2021-10-29 00:08:58,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-29 00:08:58,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:08:58,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-29 00:08:58,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-10-29 00:08:58,599 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) [2021-10-29 00:08:58,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:08:58,702 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2021-10-29 00:08:58,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-29 00:08:58,703 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 [2021-10-29 00:08:58,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:08:58,703 INFO L225 Difference]: With dead ends: 48 [2021-10-29 00:08:58,703 INFO L226 Difference]: Without dead ends: 0 [2021-10-29 00:08:58,703 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 [2021-10-29 00:08:58,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-29 00:08:58,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-29 00:08:58,704 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) [2021-10-29 00:08:58,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-29 00:08:58,704 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 56 [2021-10-29 00:08:58,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:08:58,705 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-29 00:08:58,705 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) [2021-10-29 00:08:58,705 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-29 00:08:58,705 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-29 00:08:58,708 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION [2021-10-29 00:08:58,709 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION [2021-10-29 00:08:58,709 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION [2021-10-29 00:08:58,709 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr3REQUIRES_VIOLATION [2021-10-29 00:08:58,709 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr4ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 00:08:58,710 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr5ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 00:08:58,710 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr6ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 00:08:58,710 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr7ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 00:08:58,710 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr8ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 00:08:58,710 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr9ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 00:08:58,711 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr10ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 00:08:58,711 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr11ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 00:08:58,711 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr12ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 00:08:58,711 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr13ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 00:08:58,712 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr14ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 00:08:58,712 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr15ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 00:08:58,712 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr16ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 00:08:58,712 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr17ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 00:08:58,713 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr18ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 00:08:58,713 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr19ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 00:08:58,713 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr20ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 00:08:58,713 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr21ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 00:08:58,713 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr22ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 00:08:58,714 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr23ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 00:08:58,714 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr24ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 00:08:58,714 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr25ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 00:08:58,714 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr26ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 00:08:58,715 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr27ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 00:08:58,715 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr28ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 00:08:58,715 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr29ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 00:08:58,715 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr30ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 00:08:58,716 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr31ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 00:08:58,716 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr32ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 00:08:58,716 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr33ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 00:08:58,716 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr34ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 00:08:58,716 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr35ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 00:08:58,716 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr36ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 00:08:58,716 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr37ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 00:08:58,716 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr38ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 00:08:58,717 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr39ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 00:08:58,717 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr40ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 00:08:58,717 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr41ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 00:08:58,717 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr42ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 00:08:58,717 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr43ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 00:08:58,717 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr44ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 00:08:58,717 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr45ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 00:08:58,717 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr46ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 00:08:58,717 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr47ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 00:08:58,718 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr48ASSERT_VIOLATIONMEMORY_FREE [2021-10-29 00:08:58,718 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr0REQUIRES_VIOLATION [2021-10-29 00:08:58,718 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr1REQUIRES_VIOLATION [2021-10-29 00:08:58,718 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr2REQUIRES_VIOLATION [2021-10-29 00:08:58,718 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr3REQUIRES_VIOLATION [2021-10-29 00:08:58,718 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr4REQUIRES_VIOLATION [2021-10-29 00:08:58,718 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr5REQUIRES_VIOLATION [2021-10-29 00:08:58,718 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr6REQUIRES_VIOLATION [2021-10-29 00:08:58,718 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr7REQUIRES_VIOLATION [2021-10-29 00:08:58,718 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr8REQUIRES_VIOLATION [2021-10-29 00:08:58,718 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr9REQUIRES_VIOLATION [2021-10-29 00:08:58,719 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr10REQUIRES_VIOLATION [2021-10-29 00:08:58,719 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr11REQUIRES_VIOLATION [2021-10-29 00:08:58,719 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0ENSURES_VIOLATIONMEMORY_LEAK [2021-10-29 00:08:58,749 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-10-29 00:08:58,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-10-29 00:08:58,923 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] [2021-10-29 00:08:58,926 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-29 00:08:58,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 12:08:58 BoogieIcfgContainer [2021-10-29 00:08:58,930 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-29 00:08:58,931 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-29 00:08:58,931 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-29 00:08:58,931 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-29 00:08:58,932 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 12:03:16" (3/4) ... [2021-10-29 00:08:58,935 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-29 00:08:58,943 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-10-29 00:08:58,943 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure myexit [2021-10-29 00:08:58,944 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2021-10-29 00:08:58,944 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure _destroy_in_nondeterministic_order [2021-10-29 00:08:58,944 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2021-10-29 00:08:58,944 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-10-29 00:08:58,945 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure dll_circular_create [2021-10-29 00:08:58,954 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-10-29 00:08:58,955 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-29 00:08:58,955 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-29 00:08:58,956 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-29 00:08:59,008 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/witness.graphml [2021-10-29 00:08:59,008 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-29 00:08:59,010 INFO L168 Benchmark]: Toolchain (without parser) took 343857.53 ms. Allocated memory was 109.1 MB in the beginning and 327.2 MB in the end (delta: 218.1 MB). Free memory was 73.6 MB in the beginning and 66.3 MB in the end (delta: 7.4 MB). Peak memory consumption was 224.7 MB. Max. memory is 16.1 GB. [2021-10-29 00:08:59,010 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 83.9 MB. Free memory is still 40.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 00:08:59,011 INFO L168 Benchmark]: CACSL2BoogieTranslator took 498.03 ms. Allocated memory is still 109.1 MB. Free memory was 73.4 MB in the beginning and 77.9 MB in the end (delta: -4.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-29 00:08:59,011 INFO L168 Benchmark]: Boogie Preprocessor took 84.26 ms. Allocated memory is still 109.1 MB. Free memory was 77.9 MB in the beginning and 75.4 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 00:08:59,011 INFO L168 Benchmark]: RCFGBuilder took 777.14 ms. Allocated memory is still 109.1 MB. Free memory was 75.4 MB in the beginning and 51.0 MB in the end (delta: 24.4 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2021-10-29 00:08:59,012 INFO L168 Benchmark]: TraceAbstraction took 342409.98 ms. Allocated memory was 109.1 MB in the beginning and 327.2 MB in the end (delta: 218.1 MB). Free memory was 50.6 MB in the beginning and 70.4 MB in the end (delta: -19.8 MB). Peak memory consumption was 200.1 MB. Max. memory is 16.1 GB. [2021-10-29 00:08:59,012 INFO L168 Benchmark]: Witness Printer took 77.84 ms. Allocated memory is still 327.2 MB. Free memory was 70.4 MB in the beginning and 66.3 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-29 00:08:59,014 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 83.9 MB. Free memory is still 40.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 498.03 ms. Allocated memory is still 109.1 MB. Free memory was 73.4 MB in the beginning and 77.9 MB in the end (delta: -4.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 84.26 ms. Allocated memory is still 109.1 MB. Free memory was 77.9 MB in the beginning and 75.4 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 777.14 ms. Allocated memory is still 109.1 MB. Free memory was 75.4 MB in the beginning and 51.0 MB in the end (delta: 24.4 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 342409.98 ms. Allocated memory was 109.1 MB in the beginning and 327.2 MB in the end (delta: 218.1 MB). Free memory was 50.6 MB in the beginning and 70.4 MB in the end (delta: -19.8 MB). Peak memory consumption was 200.1 MB. Max. memory is 16.1 GB. * Witness Printer took 77.84 ms. Allocated memory is still 327.2 MB. Free memory was 70.4 MB in the beginning and 66.3 MB in the end (delta: 4.2 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: 342.3s, OverallIterations: 34, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 185.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 2671 SDtfs, 5843 SDslu, 18643 SDs, 0 SdLazy, 39553 SolverSat, 1521 SolverUnsat, 70 SolverUnknown, 0 SolverNotchecked, 57.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2007 GetRequests, 669 SyntacticMatches, 25 SemanticMatches, 1313 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17729 ImplicationChecksByTransitivity, 171.4s 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, 139.9s 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! [2021-10-29 00:08:59,236 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-10-29 00:08:59,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15936f0a-090d-4a5a-a8ca-c450e3660aff/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request...