./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2c_update_all.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_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/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_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2c_update_all.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/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_cb253db0-85d8-4da4-a90a-b82bb93afb86/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 e86102617f1813255879beda7bab492587801800e6506c4c5cd56fb9179f8713 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 22:49:22,836 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 22:49:22,838 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 22:49:22,891 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 22:49:22,892 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 22:49:22,894 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 22:49:22,896 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 22:49:22,898 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 22:49:22,901 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 22:49:22,902 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 22:49:22,904 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 22:49:22,905 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 22:49:22,906 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 22:49:22,907 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 22:49:22,909 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 22:49:22,913 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 22:49:22,914 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 22:49:22,915 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 22:49:22,918 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 22:49:22,920 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 22:49:22,922 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 22:49:22,925 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 22:49:22,927 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 22:49:22,928 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 22:49:22,932 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 22:49:22,933 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 22:49:22,933 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 22:49:22,935 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 22:49:22,935 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 22:49:22,936 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 22:49:22,937 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 22:49:22,938 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 22:49:22,939 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 22:49:22,940 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 22:49:22,941 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 22:49:22,942 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 22:49:22,943 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 22:49:22,943 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 22:49:22,943 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 22:49:22,944 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 22:49:22,946 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 22:49:22,947 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-28 22:49:22,988 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 22:49:22,988 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 22:49:22,989 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 22:49:22,989 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 22:49:22,991 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 22:49:22,991 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 22:49:22,991 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 22:49:22,992 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 22:49:22,992 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 22:49:22,992 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 22:49:22,993 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 22:49:22,993 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 22:49:22,994 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 22:49:22,994 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-28 22:49:22,994 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-28 22:49:22,994 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-28 22:49:22,995 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 22:49:22,995 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-28 22:49:22,995 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 22:49:22,995 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 22:49:22,995 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 22:49:22,996 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 22:49:22,996 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 22:49:22,996 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 22:49:22,996 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 22:49:22,997 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 22:49:22,997 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 22:49:22,997 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 22:49:22,997 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 22:49:22,999 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_cb253db0-85d8-4da4-a90a-b82bb93afb86/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e86102617f1813255879beda7bab492587801800e6506c4c5cd56fb9179f8713 [2021-10-28 22:49:23,334 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 22:49:23,357 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 22:49:23,360 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 22:49:23,361 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 22:49:23,362 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 22:49:23,363 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/../../sv-benchmarks/c/list-simple/sll2c_update_all.i [2021-10-28 22:49:23,437 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/data/c50f6ce55/a0818336c2ac4b7a9d87fc4afb57916b/FLAG292f99950 [2021-10-28 22:49:24,045 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 22:49:24,046 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/sv-benchmarks/c/list-simple/sll2c_update_all.i [2021-10-28 22:49:24,070 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/data/c50f6ce55/a0818336c2ac4b7a9d87fc4afb57916b/FLAG292f99950 [2021-10-28 22:49:24,334 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/data/c50f6ce55/a0818336c2ac4b7a9d87fc4afb57916b [2021-10-28 22:49:24,337 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 22:49:24,338 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-28 22:49:24,346 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 22:49:24,346 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 22:49:24,350 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 22:49:24,351 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:49:24" (1/1) ... [2021-10-28 22:49:24,353 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ce4df23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:49:24, skipping insertion in model container [2021-10-28 22:49:24,354 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:49:24" (1/1) ... [2021-10-28 22:49:24,363 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 22:49:24,448 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 22:49:24,879 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/sv-benchmarks/c/list-simple/sll2c_update_all.i[24418,24431] [2021-10-28 22:49:24,885 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 22:49:24,901 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 22:49:24,968 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/sv-benchmarks/c/list-simple/sll2c_update_all.i[24418,24431] [2021-10-28 22:49:24,972 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 22:49:25,012 INFO L208 MainTranslator]: Completed translation [2021-10-28 22:49:25,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:49:25 WrapperNode [2021-10-28 22:49:25,013 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 22:49:25,016 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 22:49:25,016 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 22:49:25,016 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 22:49:25,029 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:49:25" (1/1) ... [2021-10-28 22:49:25,030 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:49:25" (1/1) ... [2021-10-28 22:49:25,066 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:49:25" (1/1) ... [2021-10-28 22:49:25,068 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:49:25" (1/1) ... [2021-10-28 22:49:25,096 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:49:25" (1/1) ... [2021-10-28 22:49:25,111 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:49:25" (1/1) ... [2021-10-28 22:49:25,116 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:49:25" (1/1) ... [2021-10-28 22:49:25,134 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 22:49:25,135 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 22:49:25,136 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 22:49:25,136 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 22:49:25,145 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:49:25" (1/1) ... [2021-10-28 22:49:25,154 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 22:49:25,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:49:25,186 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 22:49:25,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 22:49:25,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-28 22:49:25,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 22:49:25,231 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-28 22:49:25,231 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-28 22:49:25,231 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-28 22:49:25,233 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-10-28 22:49:25,233 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-10-28 22:49:25,233 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_circular_create [2021-10-28 22:49:25,233 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_circular_destroy [2021-10-28 22:49:25,234 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_circular_get_data_at [2021-10-28 22:49:25,234 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_circular_update_at [2021-10-28 22:49:25,235 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-28 22:49:25,235 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-28 22:49:25,235 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-28 22:49:25,235 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-28 22:49:25,236 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-28 22:49:25,236 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-28 22:49:25,236 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 22:49:25,236 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-28 22:49:25,237 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-28 22:49:25,237 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-28 22:49:25,237 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-28 22:49:25,237 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-28 22:49:25,237 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-28 22:49:25,238 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-28 22:49:25,238 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-28 22:49:25,238 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-28 22:49:25,238 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-28 22:49:25,239 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-28 22:49:25,239 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-28 22:49:25,239 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-28 22:49:25,239 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-28 22:49:25,239 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-28 22:49:25,240 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-28 22:49:25,240 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-28 22:49:25,240 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-28 22:49:25,240 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-28 22:49:25,240 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-28 22:49:25,241 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-28 22:49:25,241 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-28 22:49:25,241 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-28 22:49:25,241 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-28 22:49:25,242 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-28 22:49:25,242 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-28 22:49:25,242 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-28 22:49:25,242 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-28 22:49:25,242 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-28 22:49:25,243 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-28 22:49:25,243 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-28 22:49:25,244 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-28 22:49:25,244 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-28 22:49:25,244 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-28 22:49:25,245 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-28 22:49:25,245 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-28 22:49:25,245 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-28 22:49:25,246 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-28 22:49:25,246 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-28 22:49:25,246 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-28 22:49:25,246 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-28 22:49:25,247 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-28 22:49:25,247 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-28 22:49:25,247 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-28 22:49:25,247 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-28 22:49:25,247 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-28 22:49:25,248 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-28 22:49:25,248 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-28 22:49:25,249 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-28 22:49:25,250 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-28 22:49:25,250 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-28 22:49:25,251 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-28 22:49:25,251 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-28 22:49:25,251 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-28 22:49:25,251 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-28 22:49:25,251 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-28 22:49:25,252 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-10-28 22:49:25,252 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-28 22:49:25,252 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-28 22:49:25,252 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-28 22:49:25,252 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-28 22:49:25,252 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-28 22:49:25,252 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-28 22:49:25,252 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-28 22:49:25,252 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-28 22:49:25,253 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-28 22:49:25,253 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-28 22:49:25,253 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-28 22:49:25,253 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-28 22:49:25,253 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-28 22:49:25,253 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-28 22:49:25,253 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-28 22:49:25,253 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-28 22:49:25,253 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-28 22:49:25,254 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-28 22:49:25,254 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-28 22:49:25,254 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-28 22:49:25,254 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-28 22:49:25,254 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-28 22:49:25,254 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-28 22:49:25,254 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-28 22:49:25,254 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-28 22:49:25,254 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-28 22:49:25,255 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-28 22:49:25,255 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-28 22:49:25,255 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-28 22:49:25,255 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-28 22:49:25,255 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-28 22:49:25,255 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-28 22:49:25,255 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-28 22:49:25,255 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-28 22:49:25,255 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-28 22:49:25,255 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-28 22:49:25,256 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-28 22:49:25,256 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-28 22:49:25,256 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-28 22:49:25,256 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-28 22:49:25,256 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-28 22:49:25,256 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-28 22:49:25,256 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-28 22:49:25,256 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-28 22:49:25,256 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-28 22:49:25,257 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-28 22:49:25,257 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-28 22:49:25,257 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-10-28 22:49:25,257 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-10-28 22:49:25,257 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-28 22:49:25,257 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-28 22:49:25,257 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-28 22:49:25,257 INFO L130 BoogieDeclarations]: Found specification of procedure sll_circular_create [2021-10-28 22:49:25,258 INFO L130 BoogieDeclarations]: Found specification of procedure sll_circular_destroy [2021-10-28 22:49:25,258 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-28 22:49:25,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 22:49:25,258 INFO L130 BoogieDeclarations]: Found specification of procedure sll_circular_get_data_at [2021-10-28 22:49:25,258 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-28 22:49:25,258 INFO L130 BoogieDeclarations]: Found specification of procedure sll_circular_update_at [2021-10-28 22:49:25,258 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-28 22:49:25,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-28 22:49:25,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 22:49:25,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 22:49:25,519 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-10-28 22:49:25,883 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 22:49:25,883 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-10-28 22:49:25,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:49:25 BoogieIcfgContainer [2021-10-28 22:49:25,886 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 22:49:25,888 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 22:49:25,888 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 22:49:25,891 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 22:49:25,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 10:49:24" (1/3) ... [2021-10-28 22:49:25,892 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fd86b89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:49:25, skipping insertion in model container [2021-10-28 22:49:25,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:49:25" (2/3) ... [2021-10-28 22:49:25,893 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fd86b89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:49:25, skipping insertion in model container [2021-10-28 22:49:25,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:49:25" (3/3) ... [2021-10-28 22:49:25,894 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2c_update_all.i [2021-10-28 22:49:25,900 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 22:49:25,900 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2021-10-28 22:49:25,977 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 22:49:25,986 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-28 22:49:25,987 INFO L340 AbstractCegarLoop]: Starting to check reachability of 28 error locations. [2021-10-28 22:49:26,010 INFO L276 IsEmpty]: Start isEmpty. Operand has 104 states, 59 states have (on average 1.728813559322034) internal successors, (102), 87 states have internal predecessors, (102), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-10-28 22:49:26,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-28 22:49:26,033 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:49:26,034 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:49:26,035 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 22:49:26,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:49:26,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1445934727, now seen corresponding path program 1 times [2021-10-28 22:49:26,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:49:26,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062929136] [2021-10-28 22:49:26,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:49:26,056 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:49:26,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:26,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:49:26,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:26,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:49:26,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:49:26,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062929136] [2021-10-28 22:49:26,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062929136] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:49:26,420 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:49:26,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 22:49:26,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138918687] [2021-10-28 22:49:26,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 22:49:26,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:49:26,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 22:49:26,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 22:49:26,456 INFO L87 Difference]: Start difference. First operand has 104 states, 59 states have (on average 1.728813559322034) internal successors, (102), 87 states have internal predecessors, (102), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:49:26,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:49:26,807 INFO L93 Difference]: Finished difference Result 121 states and 130 transitions. [2021-10-28 22:49:26,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 22:49:26,809 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 12 [2021-10-28 22:49:26,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:49:26,822 INFO L225 Difference]: With dead ends: 121 [2021-10-28 22:49:26,822 INFO L226 Difference]: Without dead ends: 115 [2021-10-28 22:49:26,824 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 22:49:26,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-10-28 22:49:26,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 96. [2021-10-28 22:49:26,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 56 states have (on average 1.5714285714285714) internal successors, (88), 81 states have internal predecessors, (88), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-10-28 22:49:26,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 103 transitions. [2021-10-28 22:49:26,882 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 103 transitions. Word has length 12 [2021-10-28 22:49:26,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:49:26,883 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 103 transitions. [2021-10-28 22:49:26,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:49:26,883 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 103 transitions. [2021-10-28 22:49:26,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-28 22:49:26,884 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:49:26,885 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:49:26,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 22:49:26,885 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 22:49:26,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:49:26,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1445934728, now seen corresponding path program 1 times [2021-10-28 22:49:26,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:49:26,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014570105] [2021-10-28 22:49:26,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:49:26,888 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:49:26,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:26,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:49:26,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:27,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:49:27,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:49:27,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014570105] [2021-10-28 22:49:27,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014570105] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:49:27,024 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:49:27,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 22:49:27,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676159602] [2021-10-28 22:49:27,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 22:49:27,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:49:27,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 22:49:27,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 22:49:27,028 INFO L87 Difference]: Start difference. First operand 96 states and 103 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:49:27,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:49:27,306 INFO L93 Difference]: Finished difference Result 113 states and 121 transitions. [2021-10-28 22:49:27,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 22:49:27,308 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 12 [2021-10-28 22:49:27,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:49:27,313 INFO L225 Difference]: With dead ends: 113 [2021-10-28 22:49:27,313 INFO L226 Difference]: Without dead ends: 113 [2021-10-28 22:49:27,314 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 22:49:27,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-10-28 22:49:27,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 94. [2021-10-28 22:49:27,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 56 states have (on average 1.5357142857142858) internal successors, (86), 79 states have internal predecessors, (86), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-10-28 22:49:27,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 101 transitions. [2021-10-28 22:49:27,340 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 101 transitions. Word has length 12 [2021-10-28 22:49:27,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:49:27,341 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 101 transitions. [2021-10-28 22:49:27,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:49:27,341 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 101 transitions. [2021-10-28 22:49:27,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-28 22:49:27,343 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:49:27,343 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:49:27,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 22:49:27,344 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting sll_circular_createErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 22:49:27,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:49:27,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1652501893, now seen corresponding path program 1 times [2021-10-28 22:49:27,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:49:27,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348999629] [2021-10-28 22:49:27,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:49:27,346 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:49:27,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:27,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:49:27,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:27,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-28 22:49:27,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:27,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:49:27,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:49:27,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348999629] [2021-10-28 22:49:27,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348999629] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:49:27,542 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:49:27,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 22:49:27,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472085386] [2021-10-28 22:49:27,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 22:49:27,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:49:27,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 22:49:27,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 22:49:27,545 INFO L87 Difference]: Start difference. First operand 94 states and 101 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 22:49:28,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:49:28,049 INFO L93 Difference]: Finished difference Result 120 states and 129 transitions. [2021-10-28 22:49:28,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 22:49:28,051 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2021-10-28 22:49:28,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:49:28,057 INFO L225 Difference]: With dead ends: 120 [2021-10-28 22:49:28,057 INFO L226 Difference]: Without dead ends: 120 [2021-10-28 22:49:28,058 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-10-28 22:49:28,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-10-28 22:49:28,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 95. [2021-10-28 22:49:28,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 57 states have (on average 1.5263157894736843) internal successors, (87), 80 states have internal predecessors, (87), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-10-28 22:49:28,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 102 transitions. [2021-10-28 22:49:28,075 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 102 transitions. Word has length 19 [2021-10-28 22:49:28,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:49:28,076 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 102 transitions. [2021-10-28 22:49:28,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 22:49:28,079 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 102 transitions. [2021-10-28 22:49:28,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-28 22:49:28,082 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:49:28,083 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:49:28,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-28 22:49:28,083 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting sll_circular_createErr0REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 22:49:28,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:49:28,084 INFO L85 PathProgramCache]: Analyzing trace with hash 173693975, now seen corresponding path program 1 times [2021-10-28 22:49:28,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:49:28,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323127667] [2021-10-28 22:49:28,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:49:28,086 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:49:28,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:28,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:49:28,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:28,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-28 22:49:28,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:28,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-28 22:49:28,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:28,292 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-28 22:49:28,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:49:28,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323127667] [2021-10-28 22:49:28,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323127667] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:49:28,293 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:49:28,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 22:49:28,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40354849] [2021-10-28 22:49:28,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 22:49:28,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:49:28,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 22:49:28,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-28 22:49:28,295 INFO L87 Difference]: Start difference. First operand 95 states and 102 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 22:49:28,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:49:28,702 INFO L93 Difference]: Finished difference Result 114 states and 123 transitions. [2021-10-28 22:49:28,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 22:49:28,703 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2021-10-28 22:49:28,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:49:28,705 INFO L225 Difference]: With dead ends: 114 [2021-10-28 22:49:28,706 INFO L226 Difference]: Without dead ends: 114 [2021-10-28 22:49:28,707 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-28 22:49:28,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-10-28 22:49:28,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 94. [2021-10-28 22:49:28,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 57 states have (on average 1.5087719298245614) internal successors, (86), 79 states have internal predecessors, (86), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-10-28 22:49:28,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 101 transitions. [2021-10-28 22:49:28,722 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 101 transitions. Word has length 28 [2021-10-28 22:49:28,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:49:28,723 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 101 transitions. [2021-10-28 22:49:28,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 22:49:28,723 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 101 transitions. [2021-10-28 22:49:28,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-28 22:49:28,724 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:49:28,725 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:49:28,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-28 22:49:28,725 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting sll_circular_createErr1REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 22:49:28,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:49:28,726 INFO L85 PathProgramCache]: Analyzing trace with hash 173693976, now seen corresponding path program 1 times [2021-10-28 22:49:28,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:49:28,726 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704964504] [2021-10-28 22:49:28,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:49:28,727 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:49:28,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:28,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:49:28,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:28,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-28 22:49:28,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:28,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-28 22:49:28,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:28,925 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:49:28,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:49:28,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704964504] [2021-10-28 22:49:28,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704964504] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:49:28,926 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:49:28,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 22:49:28,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289776589] [2021-10-28 22:49:28,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 22:49:28,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:49:28,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 22:49:28,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-28 22:49:28,927 INFO L87 Difference]: Start difference. First operand 94 states and 101 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 22:49:29,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:49:29,305 INFO L93 Difference]: Finished difference Result 113 states and 122 transitions. [2021-10-28 22:49:29,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 22:49:29,306 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2021-10-28 22:49:29,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:49:29,308 INFO L225 Difference]: With dead ends: 113 [2021-10-28 22:49:29,308 INFO L226 Difference]: Without dead ends: 113 [2021-10-28 22:49:29,308 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-28 22:49:29,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-10-28 22:49:29,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 93. [2021-10-28 22:49:29,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 57 states have (on average 1.4912280701754386) internal successors, (85), 78 states have internal predecessors, (85), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-10-28 22:49:29,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 100 transitions. [2021-10-28 22:49:29,314 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 100 transitions. Word has length 28 [2021-10-28 22:49:29,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:49:29,315 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 100 transitions. [2021-10-28 22:49:29,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 22:49:29,315 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 100 transitions. [2021-10-28 22:49:29,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-28 22:49:29,316 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:49:29,316 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:49:29,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-28 22:49:29,317 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting sll_circular_createErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 22:49:29,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:49:29,318 INFO L85 PathProgramCache]: Analyzing trace with hash -918257581, now seen corresponding path program 1 times [2021-10-28 22:49:29,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:49:29,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90428429] [2021-10-28 22:49:29,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:49:29,319 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:49:29,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:29,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:49:29,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:29,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-28 22:49:29,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:29,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-28 22:49:29,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:29,539 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 22:49:29,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:49:29,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90428429] [2021-10-28 22:49:29,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90428429] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:49:29,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446406264] [2021-10-28 22:49:29,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:49:29,540 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:49:29,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:49:29,542 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:49:29,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 22:49:29,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:29,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-28 22:49:29,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:49:29,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 22:49:30,008 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-28 22:49:30,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-10-28 22:49:30,247 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:49:30,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446406264] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:49:30,248 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:49:30,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-10-28 22:49:30,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495462041] [2021-10-28 22:49:30,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 22:49:30,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:49:30,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 22:49:30,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-10-28 22:49:30,250 INFO L87 Difference]: Start difference. First operand 93 states and 100 transitions. Second operand has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 22:49:30,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:49:30,895 INFO L93 Difference]: Finished difference Result 112 states and 121 transitions. [2021-10-28 22:49:30,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 22:49:30,898 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 31 [2021-10-28 22:49:30,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:49:30,899 INFO L225 Difference]: With dead ends: 112 [2021-10-28 22:49:30,899 INFO L226 Difference]: Without dead ends: 112 [2021-10-28 22:49:30,900 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-10-28 22:49:30,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-10-28 22:49:30,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 92. [2021-10-28 22:49:30,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 57 states have (on average 1.4736842105263157) internal successors, (84), 77 states have internal predecessors, (84), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-10-28 22:49:30,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 99 transitions. [2021-10-28 22:49:30,905 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 99 transitions. Word has length 31 [2021-10-28 22:49:30,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:49:30,905 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 99 transitions. [2021-10-28 22:49:30,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 22:49:30,906 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 99 transitions. [2021-10-28 22:49:30,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-28 22:49:30,907 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:49:30,907 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:49:30,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 22:49:31,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:49:31,137 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting sll_circular_createErr3REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 22:49:31,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:49:31,137 INFO L85 PathProgramCache]: Analyzing trace with hash -918257580, now seen corresponding path program 1 times [2021-10-28 22:49:31,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:49:31,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565764647] [2021-10-28 22:49:31,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:49:31,138 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:49:31,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:31,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:49:31,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:31,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-28 22:49:31,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:31,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-28 22:49:31,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:31,406 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 22:49:31,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:49:31,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565764647] [2021-10-28 22:49:31,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565764647] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:49:31,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254191243] [2021-10-28 22:49:31,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:49:31,408 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:49:31,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:49:31,413 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:49:31,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 22:49:31,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:31,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-28 22:49:31,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:49:31,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 22:49:31,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 22:49:32,010 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-28 22:49:32,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2021-10-28 22:49:32,019 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 22:49:32,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-10-28 22:49:32,148 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:49:32,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254191243] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:49:32,148 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:49:32,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-10-28 22:49:32,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395212336] [2021-10-28 22:49:32,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-28 22:49:32,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:49:32,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-28 22:49:32,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-10-28 22:49:32,152 INFO L87 Difference]: Start difference. First operand 92 states and 99 transitions. Second operand has 17 states, 16 states have (on average 2.6875) internal successors, (43), 12 states have internal predecessors, (43), 3 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-28 22:49:32,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:49:32,906 INFO L93 Difference]: Finished difference Result 111 states and 120 transitions. [2021-10-28 22:49:32,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 22:49:32,907 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.6875) internal successors, (43), 12 states have internal predecessors, (43), 3 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 31 [2021-10-28 22:49:32,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:49:32,908 INFO L225 Difference]: With dead ends: 111 [2021-10-28 22:49:32,908 INFO L226 Difference]: Without dead ends: 111 [2021-10-28 22:49:32,909 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-10-28 22:49:32,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-10-28 22:49:32,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 91. [2021-10-28 22:49:32,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 57 states have (on average 1.456140350877193) internal successors, (83), 76 states have internal predecessors, (83), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-10-28 22:49:32,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 98 transitions. [2021-10-28 22:49:32,914 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 98 transitions. Word has length 31 [2021-10-28 22:49:32,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:49:32,914 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 98 transitions. [2021-10-28 22:49:32,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.6875) internal successors, (43), 12 states have internal predecessors, (43), 3 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-28 22:49:32,915 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 98 transitions. [2021-10-28 22:49:32,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-28 22:49:32,916 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:49:32,916 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:49:32,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 22:49:33,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:49:33,117 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting sll_circular_update_atErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 22:49:33,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:49:33,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1835388011, now seen corresponding path program 1 times [2021-10-28 22:49:33,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:49:33,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132574610] [2021-10-28 22:49:33,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:49:33,119 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:49:33,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:33,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:49:33,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:33,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:49:33,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:33,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 22:49:33,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:33,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 22:49:33,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:33,338 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-28 22:49:33,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:49:33,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132574610] [2021-10-28 22:49:33,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132574610] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:49:33,339 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:49:33,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-10-28 22:49:33,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879588753] [2021-10-28 22:49:33,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-28 22:49:33,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:49:33,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-28 22:49:33,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-10-28 22:49:33,342 INFO L87 Difference]: Start difference. First operand 91 states and 98 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 22:49:34,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:49:34,066 INFO L93 Difference]: Finished difference Result 119 states and 128 transitions. [2021-10-28 22:49:34,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-28 22:49:34,066 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 40 [2021-10-28 22:49:34,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:49:34,068 INFO L225 Difference]: With dead ends: 119 [2021-10-28 22:49:34,068 INFO L226 Difference]: Without dead ends: 119 [2021-10-28 22:49:34,069 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-10-28 22:49:34,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-10-28 22:49:34,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 94. [2021-10-28 22:49:34,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 60 states have (on average 1.4833333333333334) internal successors, (89), 79 states have internal predecessors, (89), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-10-28 22:49:34,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 104 transitions. [2021-10-28 22:49:34,073 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 104 transitions. Word has length 40 [2021-10-28 22:49:34,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:49:34,074 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 104 transitions. [2021-10-28 22:49:34,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 22:49:34,074 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 104 transitions. [2021-10-28 22:49:34,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-28 22:49:34,075 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:49:34,075 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:49:34,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-28 22:49:34,076 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting sll_circular_update_atErr3REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 22:49:34,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:49:34,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1835388012, now seen corresponding path program 1 times [2021-10-28 22:49:34,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:49:34,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573199413] [2021-10-28 22:49:34,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:49:34,083 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:49:34,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:34,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:49:34,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:34,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:49:34,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:34,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 22:49:34,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:34,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 22:49:34,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:34,456 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:49:34,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:49:34,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573199413] [2021-10-28 22:49:34,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573199413] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:49:34,457 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:49:34,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-10-28 22:49:34,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809961994] [2021-10-28 22:49:34,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-28 22:49:34,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:49:34,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-28 22:49:34,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-10-28 22:49:34,459 INFO L87 Difference]: Start difference. First operand 94 states and 104 transitions. Second operand has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 22:49:35,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:49:35,305 INFO L93 Difference]: Finished difference Result 117 states and 127 transitions. [2021-10-28 22:49:35,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 22:49:35,306 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 40 [2021-10-28 22:49:35,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:49:35,307 INFO L225 Difference]: With dead ends: 117 [2021-10-28 22:49:35,307 INFO L226 Difference]: Without dead ends: 117 [2021-10-28 22:49:35,307 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-10-28 22:49:35,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-10-28 22:49:35,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 94. [2021-10-28 22:49:35,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 60 states have (on average 1.45) internal successors, (87), 79 states have internal predecessors, (87), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-10-28 22:49:35,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 102 transitions. [2021-10-28 22:49:35,311 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 102 transitions. Word has length 40 [2021-10-28 22:49:35,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:49:35,312 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 102 transitions. [2021-10-28 22:49:35,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 22:49:35,312 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 102 transitions. [2021-10-28 22:49:35,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-10-28 22:49:35,316 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:49:35,317 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:49:35,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-28 22:49:35,317 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting sll_circular_destroyErr0REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 22:49:35,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:49:35,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1224058359, now seen corresponding path program 1 times [2021-10-28 22:49:35,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:49:35,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072378789] [2021-10-28 22:49:35,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:49:35,318 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:49:35,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:35,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:49:35,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:35,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:49:35,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:35,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 22:49:35,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:35,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 22:49:35,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:35,461 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-28 22:49:35,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:49:35,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072378789] [2021-10-28 22:49:35,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072378789] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:49:35,462 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:49:35,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 22:49:35,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129309017] [2021-10-28 22:49:35,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 22:49:35,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:49:35,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 22:49:35,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-28 22:49:35,468 INFO L87 Difference]: Start difference. First operand 94 states and 102 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 4 states have internal predecessors, (26), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 22:49:35,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:49:35,735 INFO L93 Difference]: Finished difference Result 123 states and 134 transitions. [2021-10-28 22:49:35,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 22:49:35,735 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 4 states have internal predecessors, (26), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 42 [2021-10-28 22:49:35,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:49:35,737 INFO L225 Difference]: With dead ends: 123 [2021-10-28 22:49:35,737 INFO L226 Difference]: Without dead ends: 123 [2021-10-28 22:49:35,737 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-10-28 22:49:35,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-10-28 22:49:35,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 96. [2021-10-28 22:49:35,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 62 states have (on average 1.435483870967742) internal successors, (89), 81 states have internal predecessors, (89), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-10-28 22:49:35,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 104 transitions. [2021-10-28 22:49:35,742 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 104 transitions. Word has length 42 [2021-10-28 22:49:35,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:49:35,742 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 104 transitions. [2021-10-28 22:49:35,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 4 states have internal predecessors, (26), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 22:49:35,742 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 104 transitions. [2021-10-28 22:49:35,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-28 22:49:35,743 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:49:35,743 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:49:35,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-28 22:49:35,743 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting sll_circular_update_atErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 22:49:35,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:49:35,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1182712765, now seen corresponding path program 1 times [2021-10-28 22:49:35,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:49:35,744 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723295843] [2021-10-28 22:49:35,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:49:35,744 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:49:35,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:35,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:49:35,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:35,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:49:35,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:35,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 22:49:35,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:35,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 22:49:35,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:35,860 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-28 22:49:35,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:49:35,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723295843] [2021-10-28 22:49:35,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723295843] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:49:35,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:49:35,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 22:49:35,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622479396] [2021-10-28 22:49:35,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 22:49:35,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:49:35,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 22:49:35,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 22:49:35,863 INFO L87 Difference]: Start difference. First operand 96 states and 104 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 22:49:36,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:49:36,231 INFO L93 Difference]: Finished difference Result 128 states and 138 transitions. [2021-10-28 22:49:36,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 22:49:36,232 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 43 [2021-10-28 22:49:36,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:49:36,233 INFO L225 Difference]: With dead ends: 128 [2021-10-28 22:49:36,233 INFO L226 Difference]: Without dead ends: 128 [2021-10-28 22:49:36,233 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-10-28 22:49:36,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-10-28 22:49:36,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2021-10-28 22:49:36,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 66 states have (on average 1.4090909090909092) internal successors, (93), 86 states have internal predecessors, (93), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-10-28 22:49:36,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 110 transitions. [2021-10-28 22:49:36,238 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 110 transitions. Word has length 43 [2021-10-28 22:49:36,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:49:36,238 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 110 transitions. [2021-10-28 22:49:36,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 22:49:36,239 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 110 transitions. [2021-10-28 22:49:36,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-10-28 22:49:36,240 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:49:36,240 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:49:36,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-28 22:49:36,240 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting sll_circular_get_data_atErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 22:49:36,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:49:36,240 INFO L85 PathProgramCache]: Analyzing trace with hash 27146876, now seen corresponding path program 1 times [2021-10-28 22:49:36,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:49:36,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124652882] [2021-10-28 22:49:36,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:49:36,241 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:49:36,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:36,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:49:36,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:36,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:49:36,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:36,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 22:49:36,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:36,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 22:49:36,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:36,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 22:49:36,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:36,464 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-28 22:49:36,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:49:36,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124652882] [2021-10-28 22:49:36,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124652882] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:49:36,465 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:49:36,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-10-28 22:49:36,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826125190] [2021-10-28 22:49:36,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-28 22:49:36,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:49:36,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 22:49:36,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-10-28 22:49:36,467 INFO L87 Difference]: Start difference. First operand 102 states and 110 transitions. Second operand has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-28 22:49:37,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:49:37,161 INFO L93 Difference]: Finished difference Result 130 states and 140 transitions. [2021-10-28 22:49:37,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 22:49:37,161 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 50 [2021-10-28 22:49:37,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:49:37,163 INFO L225 Difference]: With dead ends: 130 [2021-10-28 22:49:37,163 INFO L226 Difference]: Without dead ends: 130 [2021-10-28 22:49:37,163 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-10-28 22:49:37,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-10-28 22:49:37,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 105. [2021-10-28 22:49:37,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 69 states have (on average 1.434782608695652) internal successors, (99), 89 states have internal predecessors, (99), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-10-28 22:49:37,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 116 transitions. [2021-10-28 22:49:37,168 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 116 transitions. Word has length 50 [2021-10-28 22:49:37,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:49:37,168 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 116 transitions. [2021-10-28 22:49:37,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-28 22:49:37,168 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 116 transitions. [2021-10-28 22:49:37,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-10-28 22:49:37,169 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:49:37,169 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:49:37,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-28 22:49:37,170 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting sll_circular_get_data_atErr3REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 22:49:37,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:49:37,170 INFO L85 PathProgramCache]: Analyzing trace with hash 27146877, now seen corresponding path program 1 times [2021-10-28 22:49:37,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:49:37,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995246094] [2021-10-28 22:49:37,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:49:37,170 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:49:37,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:37,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:49:37,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:37,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:49:37,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:37,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 22:49:37,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:37,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 22:49:37,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:37,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 22:49:37,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:37,350 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-28 22:49:37,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:49:37,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995246094] [2021-10-28 22:49:37,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995246094] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:49:37,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748600022] [2021-10-28 22:49:37,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:49:37,351 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:49:37,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:49:37,352 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:49:37,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 22:49:37,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:37,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 22:49:37,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:49:37,712 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-28 22:49:37,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748600022] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:49:37,713 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:49:37,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2021-10-28 22:49:37,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210071577] [2021-10-28 22:49:37,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 22:49:37,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:49:37,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 22:49:37,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-10-28 22:49:37,718 INFO L87 Difference]: Start difference. First operand 105 states and 116 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 8 states have internal predecessors, (41), 6 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-10-28 22:49:38,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:49:38,042 INFO L93 Difference]: Finished difference Result 133 states and 146 transitions. [2021-10-28 22:49:38,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 22:49:38,043 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 8 states have internal predecessors, (41), 6 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 50 [2021-10-28 22:49:38,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:49:38,045 INFO L225 Difference]: With dead ends: 133 [2021-10-28 22:49:38,045 INFO L226 Difference]: Without dead ends: 133 [2021-10-28 22:49:38,046 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-10-28 22:49:38,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-10-28 22:49:38,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 112. [2021-10-28 22:49:38,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 75 states have (on average 1.4133333333333333) internal successors, (106), 94 states have internal predecessors, (106), 10 states have call successors, (10), 8 states have call predecessors, (10), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-28 22:49:38,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 125 transitions. [2021-10-28 22:49:38,052 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 125 transitions. Word has length 50 [2021-10-28 22:49:38,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:49:38,052 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 125 transitions. [2021-10-28 22:49:38,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 8 states have internal predecessors, (41), 6 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-10-28 22:49:38,053 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 125 transitions. [2021-10-28 22:49:38,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-28 22:49:38,054 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:49:38,054 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:49:38,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 22:49:38,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-28 22:49:38,281 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting sll_circular_update_atErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 22:49:38,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:49:38,281 INFO L85 PathProgramCache]: Analyzing trace with hash 310228175, now seen corresponding path program 1 times [2021-10-28 22:49:38,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:49:38,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782228390] [2021-10-28 22:49:38,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:49:38,282 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:49:38,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:38,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:49:38,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:38,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:49:38,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:38,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 22:49:38,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:38,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 22:49:38,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:38,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 22:49:38,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:38,874 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:49:38,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:49:38,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782228390] [2021-10-28 22:49:38,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782228390] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:49:38,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546996327] [2021-10-28 22:49:38,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:49:38,875 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:49:38,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:49:38,876 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:49:38,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 22:49:39,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:49:39,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 66 conjunts are in the unsatisfiable core [2021-10-28 22:49:39,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:49:39,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 22:49:39,316 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 22:49:39,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 22:49:39,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 22:49:39,445 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-28 22:49:39,446 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 37 treesize of output 27 [2021-10-28 22:49:39,749 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 22:49:39,750 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 16 [2021-10-28 22:49:53,379 INFO L354 Elim1Store]: treesize reduction 66, result has 24.1 percent of original size [2021-10-28 22:49:53,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 39 [2021-10-28 22:49:54,035 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-10-28 22:49:54,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 28 [2021-10-28 22:49:54,046 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:49:54,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546996327] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:49:54,047 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:49:54,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 37 [2021-10-28 22:49:54,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281969783] [2021-10-28 22:49:54,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-10-28 22:49:54,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:49:54,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-10-28 22:49:54,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1302, Unknown=17, NotChecked=0, Total=1406 [2021-10-28 22:49:54,051 INFO L87 Difference]: Start difference. First operand 112 states and 125 transitions. Second operand has 38 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 27 states have internal predecessors, (61), 6 states have call successors, (13), 8 states have call predecessors, (13), 7 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2021-10-28 22:50:01,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:50:01,071 INFO L93 Difference]: Finished difference Result 209 states and 237 transitions. [2021-10-28 22:50:01,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-28 22:50:01,072 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 27 states have internal predecessors, (61), 6 states have call successors, (13), 8 states have call predecessors, (13), 7 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) Word has length 51 [2021-10-28 22:50:01,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:50:01,073 INFO L225 Difference]: With dead ends: 209 [2021-10-28 22:50:01,073 INFO L226 Difference]: Without dead ends: 209 [2021-10-28 22:50:01,075 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=321, Invalid=3202, Unknown=17, NotChecked=0, Total=3540 [2021-10-28 22:50:01,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-10-28 22:50:01,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 146. [2021-10-28 22:50:01,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 102 states have (on average 1.3627450980392157) internal successors, (139), 122 states have internal predecessors, (139), 13 states have call successors, (13), 10 states have call predecessors, (13), 11 states have return successors, (15), 13 states have call predecessors, (15), 12 states have call successors, (15) [2021-10-28 22:50:01,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 167 transitions. [2021-10-28 22:50:01,086 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 167 transitions. Word has length 51 [2021-10-28 22:50:01,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:50:01,086 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 167 transitions. [2021-10-28 22:50:01,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 27 states have internal predecessors, (61), 6 states have call successors, (13), 8 states have call predecessors, (13), 7 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2021-10-28 22:50:01,087 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 167 transitions. [2021-10-28 22:50:01,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-28 22:50:01,088 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:50:01,088 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:50:01,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 22:50:01,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-28 22:50:01,307 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting sll_circular_update_atErr3REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 22:50:01,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:50:01,307 INFO L85 PathProgramCache]: Analyzing trace with hash 310228176, now seen corresponding path program 1 times [2021-10-28 22:50:01,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:50:01,308 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040389533] [2021-10-28 22:50:01,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:50:01,308 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:50:01,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:01,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:50:01,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:01,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:50:01,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:01,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 22:50:01,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:01,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 22:50:01,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:02,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 22:50:02,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:02,330 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:50:02,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:50:02,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040389533] [2021-10-28 22:50:02,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040389533] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:50:02,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702085552] [2021-10-28 22:50:02,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:50:02,331 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:50:02,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:50:02,332 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:50:02,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 22:50:02,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:02,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 92 conjunts are in the unsatisfiable core [2021-10-28 22:50:02,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:50:02,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 22:50:02,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 22:50:03,073 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 22:50:03,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 22:50:03,082 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 0 case distinctions, treesize of input 12 treesize of output 14 [2021-10-28 22:50:03,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 22:50:03,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 22:50:03,412 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-28 22:50:03,413 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 63 treesize of output 45 [2021-10-28 22:50:03,424 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-28 22:50:03,424 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 50 [2021-10-28 22:50:03,931 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 22:50:03,931 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 35 [2021-10-28 22:50:03,944 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 22:50:03,945 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 29 treesize of output 21 [2021-10-28 22:50:07,906 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-10-28 22:50:07,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 66 [2021-10-28 22:50:07,935 INFO L354 Elim1Store]: treesize reduction 88, result has 17.8 percent of original size [2021-10-28 22:50:07,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 69 treesize of output 56 [2021-10-28 22:50:08,420 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 22:50:08,420 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 45 [2021-10-28 22:50:08,426 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 22:50:08,426 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 36 treesize of output 24 [2021-10-28 22:50:08,589 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 22:50:08,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702085552] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:50:08,590 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:50:08,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 23] total 48 [2021-10-28 22:50:08,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957902114] [2021-10-28 22:50:08,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-10-28 22:50:08,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:50:08,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-10-28 22:50:08,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=2217, Unknown=2, NotChecked=0, Total=2352 [2021-10-28 22:50:08,593 INFO L87 Difference]: Start difference. First operand 146 states and 167 transitions. Second operand has 49 states, 48 states have (on average 1.5625) internal successors, (75), 36 states have internal predecessors, (75), 6 states have call successors, (13), 8 states have call predecessors, (13), 9 states have return successors, (9), 9 states have call predecessors, (9), 5 states have call successors, (9) [2021-10-28 22:50:37,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:50:37,736 INFO L93 Difference]: Finished difference Result 302 states and 343 transitions. [2021-10-28 22:50:37,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-28 22:50:37,736 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 1.5625) internal successors, (75), 36 states have internal predecessors, (75), 6 states have call successors, (13), 8 states have call predecessors, (13), 9 states have return successors, (9), 9 states have call predecessors, (9), 5 states have call successors, (9) Word has length 51 [2021-10-28 22:50:37,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:50:37,739 INFO L225 Difference]: With dead ends: 302 [2021-10-28 22:50:37,739 INFO L226 Difference]: Without dead ends: 302 [2021-10-28 22:50:37,742 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=467, Invalid=5366, Unknown=19, NotChecked=0, Total=5852 [2021-10-28 22:50:37,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-10-28 22:50:37,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 160. [2021-10-28 22:50:37,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 113 states have (on average 1.3539823008849559) internal successors, (153), 134 states have internal predecessors, (153), 14 states have call successors, (14), 11 states have call predecessors, (14), 13 states have return successors, (18), 14 states have call predecessors, (18), 13 states have call successors, (18) [2021-10-28 22:50:37,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 185 transitions. [2021-10-28 22:50:37,752 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 185 transitions. Word has length 51 [2021-10-28 22:50:37,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:50:37,752 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 185 transitions. [2021-10-28 22:50:37,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 1.5625) internal successors, (75), 36 states have internal predecessors, (75), 6 states have call successors, (13), 8 states have call predecessors, (13), 9 states have return successors, (9), 9 states have call predecessors, (9), 5 states have call successors, (9) [2021-10-28 22:50:37,753 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 185 transitions. [2021-10-28 22:50:37,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-10-28 22:50:37,754 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:50:37,754 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:50:37,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-28 22:50:37,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-28 22:50:37,969 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting sll_circular_update_atErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 22:50:37,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:50:37,969 INFO L85 PathProgramCache]: Analyzing trace with hash -760362657, now seen corresponding path program 2 times [2021-10-28 22:50:37,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:50:37,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346467939] [2021-10-28 22:50:37,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:50:37,969 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:50:37,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:38,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:50:38,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:38,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:50:38,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:38,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 22:50:38,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:38,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 22:50:38,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:38,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 22:50:38,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:38,103 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-28 22:50:38,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:50:38,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346467939] [2021-10-28 22:50:38,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346467939] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:50:38,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948223249] [2021-10-28 22:50:38,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 22:50:38,107 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:50:38,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:50:38,108 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:50:38,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-28 22:50:38,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 22:50:38,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:50:38,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 22:50:38,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:50:38,604 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-28 22:50:38,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948223249] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:50:38,604 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:50:38,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 11 [2021-10-28 22:50:38,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161568823] [2021-10-28 22:50:38,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 22:50:38,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:50:38,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 22:50:38,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-10-28 22:50:38,606 INFO L87 Difference]: Start difference. First operand 160 states and 185 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 7 states have internal predecessors, (45), 4 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-10-28 22:50:39,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:50:39,013 INFO L93 Difference]: Finished difference Result 177 states and 196 transitions. [2021-10-28 22:50:39,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 22:50:39,014 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 7 states have internal predecessors, (45), 4 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 54 [2021-10-28 22:50:39,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:50:39,015 INFO L225 Difference]: With dead ends: 177 [2021-10-28 22:50:39,015 INFO L226 Difference]: Without dead ends: 177 [2021-10-28 22:50:39,016 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-10-28 22:50:39,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-10-28 22:50:39,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 154. [2021-10-28 22:50:39,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 110 states have (on average 1.309090909090909) internal successors, (144), 128 states have internal predecessors, (144), 14 states have call successors, (14), 11 states have call predecessors, (14), 12 states have return successors, (15), 14 states have call predecessors, (15), 13 states have call successors, (15) [2021-10-28 22:50:39,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 173 transitions. [2021-10-28 22:50:39,022 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 173 transitions. Word has length 54 [2021-10-28 22:50:39,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:50:39,023 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 173 transitions. [2021-10-28 22:50:39,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 7 states have internal predecessors, (45), 4 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-10-28 22:50:39,023 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 173 transitions. [2021-10-28 22:50:39,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-10-28 22:50:39,024 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:50:39,024 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:50:39,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-28 22:50:39,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:50:39,243 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting sll_circular_get_data_atErr3REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 22:50:39,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:50:39,244 INFO L85 PathProgramCache]: Analyzing trace with hash 827280497, now seen corresponding path program 2 times [2021-10-28 22:50:39,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:50:39,244 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363356256] [2021-10-28 22:50:39,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:50:39,244 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:50:39,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:39,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:50:39,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:39,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:50:39,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:39,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 22:50:39,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:39,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 22:50:39,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:39,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 22:50:39,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:39,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-10-28 22:50:39,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:39,362 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-28 22:50:39,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:50:39,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363356256] [2021-10-28 22:50:39,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363356256] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:50:39,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22035157] [2021-10-28 22:50:39,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 22:50:39,364 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:50:39,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:50:39,369 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:50:39,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-28 22:50:39,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-28 22:50:39,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:50:39,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-28 22:50:39,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:50:39,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 22:50:40,147 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-28 22:50:40,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22035157] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:50:40,147 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 22:50:40,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [9] total 20 [2021-10-28 22:50:40,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216762995] [2021-10-28 22:50:40,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 22:50:40,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:50:40,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 22:50:40,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-10-28 22:50:40,149 INFO L87 Difference]: Start difference. First operand 154 states and 173 transitions. Second operand has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 10 states have internal predecessors, (38), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-28 22:50:40,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:50:40,451 INFO L93 Difference]: Finished difference Result 159 states and 177 transitions. [2021-10-28 22:50:40,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 22:50:40,451 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 10 states have internal predecessors, (38), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 58 [2021-10-28 22:50:40,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:50:40,453 INFO L225 Difference]: With dead ends: 159 [2021-10-28 22:50:40,453 INFO L226 Difference]: Without dead ends: 159 [2021-10-28 22:50:40,453 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-10-28 22:50:40,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-10-28 22:50:40,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 154. [2021-10-28 22:50:40,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 110 states have (on average 1.290909090909091) internal successors, (142), 128 states have internal predecessors, (142), 14 states have call successors, (14), 11 states have call predecessors, (14), 12 states have return successors, (15), 14 states have call predecessors, (15), 13 states have call successors, (15) [2021-10-28 22:50:40,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 171 transitions. [2021-10-28 22:50:40,460 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 171 transitions. Word has length 58 [2021-10-28 22:50:40,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:50:40,460 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 171 transitions. [2021-10-28 22:50:40,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 10 states have internal predecessors, (38), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-28 22:50:40,461 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 171 transitions. [2021-10-28 22:50:40,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-10-28 22:50:40,462 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:50:40,462 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:50:40,493 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-10-28 22:50:40,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-28 22:50:40,677 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting sll_circular_get_data_atErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 22:50:40,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:50:40,677 INFO L85 PathProgramCache]: Analyzing trace with hash 992697175, now seen corresponding path program 1 times [2021-10-28 22:50:40,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:50:40,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463546173] [2021-10-28 22:50:40,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:50:40,677 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:50:40,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:40,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:50:40,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:40,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:50:40,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:40,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 22:50:40,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:40,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 22:50:40,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:40,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 22:50:40,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:40,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-10-28 22:50:40,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:40,792 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-28 22:50:40,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:50:40,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463546173] [2021-10-28 22:50:40,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463546173] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:50:40,793 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:50:40,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-28 22:50:40,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832204299] [2021-10-28 22:50:40,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 22:50:40,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:50:40,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 22:50:40,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-10-28 22:50:40,795 INFO L87 Difference]: Start difference. First operand 154 states and 171 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-10-28 22:50:41,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:50:41,098 INFO L93 Difference]: Finished difference Result 181 states and 197 transitions. [2021-10-28 22:50:41,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 22:50:41,099 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 61 [2021-10-28 22:50:41,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:50:41,100 INFO L225 Difference]: With dead ends: 181 [2021-10-28 22:50:41,100 INFO L226 Difference]: Without dead ends: 181 [2021-10-28 22:50:41,100 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-10-28 22:50:41,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-10-28 22:50:41,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 160. [2021-10-28 22:50:41,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 115 states have (on average 1.2782608695652173) internal successors, (147), 133 states have internal predecessors, (147), 14 states have call successors, (14), 12 states have call predecessors, (14), 13 states have return successors, (15), 14 states have call predecessors, (15), 13 states have call successors, (15) [2021-10-28 22:50:41,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 176 transitions. [2021-10-28 22:50:41,106 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 176 transitions. Word has length 61 [2021-10-28 22:50:41,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:50:41,107 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 176 transitions. [2021-10-28 22:50:41,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-10-28 22:50:41,107 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 176 transitions. [2021-10-28 22:50:41,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-10-28 22:50:41,110 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:50:41,110 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:50:41,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-28 22:50:41,110 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting sll_circular_update_atErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 22:50:41,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:50:41,111 INFO L85 PathProgramCache]: Analyzing trace with hash 675898859, now seen corresponding path program 3 times [2021-10-28 22:50:41,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:50:41,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138635084] [2021-10-28 22:50:41,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:50:41,111 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:50:41,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:41,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:50:41,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:41,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:50:41,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:41,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 22:50:41,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:41,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 22:50:41,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:41,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 22:50:41,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:41,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-10-28 22:50:41,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:41,239 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-28 22:50:41,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:50:41,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138635084] [2021-10-28 22:50:41,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138635084] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:50:41,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313779602] [2021-10-28 22:50:41,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 22:50:41,240 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:50:41,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:50:41,245 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:50:41,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-28 22:50:41,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-28 22:50:41,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:50:41,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 22:50:41,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:50:42,032 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-28 22:50:42,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313779602] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:50:42,033 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:50:42,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-10-28 22:50:42,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174588185] [2021-10-28 22:50:42,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-28 22:50:42,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:50:42,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-28 22:50:42,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-10-28 22:50:42,034 INFO L87 Difference]: Start difference. First operand 160 states and 176 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 10 states have internal predecessors, (55), 6 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-10-28 22:50:42,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:50:42,552 INFO L93 Difference]: Finished difference Result 171 states and 181 transitions. [2021-10-28 22:50:42,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-28 22:50:42,553 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 10 states have internal predecessors, (55), 6 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 62 [2021-10-28 22:50:42,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:50:42,554 INFO L225 Difference]: With dead ends: 171 [2021-10-28 22:50:42,554 INFO L226 Difference]: Without dead ends: 171 [2021-10-28 22:50:42,554 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-10-28 22:50:42,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-10-28 22:50:42,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 143. [2021-10-28 22:50:42,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 101 states have (on average 1.2574257425742574) internal successors, (127), 119 states have internal predecessors, (127), 13 states have call successors, (13), 11 states have call predecessors, (13), 11 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2021-10-28 22:50:42,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 153 transitions. [2021-10-28 22:50:42,560 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 153 transitions. Word has length 62 [2021-10-28 22:50:42,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:50:42,561 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 153 transitions. [2021-10-28 22:50:42,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 10 states have internal predecessors, (55), 6 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-10-28 22:50:42,561 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 153 transitions. [2021-10-28 22:50:42,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-10-28 22:50:42,562 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:50:42,562 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:50:42,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-28 22:50:42,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:50:42,781 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting sll_circular_update_atErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 22:50:42,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:50:42,781 INFO L85 PathProgramCache]: Analyzing trace with hash -2095820899, now seen corresponding path program 4 times [2021-10-28 22:50:42,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:50:42,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262485170] [2021-10-28 22:50:42,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:50:42,781 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:50:42,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:42,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:50:42,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:42,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:50:42,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:42,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 22:50:42,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:42,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 22:50:42,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:42,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-10-28 22:50:42,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:42,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-10-28 22:50:42,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:42,915 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-10-28 22:50:42,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:50:42,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262485170] [2021-10-28 22:50:42,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262485170] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:50:42,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964335804] [2021-10-28 22:50:42,916 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 22:50:42,916 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:50:42,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:50:42,921 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:50:42,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-28 22:50:43,315 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 22:50:43,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:50:43,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 22:50:43,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:50:43,473 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-28 22:50:43,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964335804] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:50:43,473 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:50:43,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 11 [2021-10-28 22:50:43,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459718949] [2021-10-28 22:50:43,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 22:50:43,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:50:43,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 22:50:43,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-10-28 22:50:43,475 INFO L87 Difference]: Start difference. First operand 143 states and 153 transitions. Second operand has 11 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 7 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) [2021-10-28 22:50:43,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:50:43,819 INFO L93 Difference]: Finished difference Result 140 states and 149 transitions. [2021-10-28 22:50:43,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 22:50:43,819 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 7 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) Word has length 63 [2021-10-28 22:50:43,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:50:43,820 INFO L225 Difference]: With dead ends: 140 [2021-10-28 22:50:43,820 INFO L226 Difference]: Without dead ends: 131 [2021-10-28 22:50:43,820 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-10-28 22:50:43,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-10-28 22:50:43,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 112. [2021-10-28 22:50:43,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 78 states have (on average 1.2692307692307692) internal successors, (99), 93 states have internal predecessors, (99), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-28 22:50:43,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 118 transitions. [2021-10-28 22:50:43,825 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 118 transitions. Word has length 63 [2021-10-28 22:50:43,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:50:43,825 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 118 transitions. [2021-10-28 22:50:43,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 7 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) [2021-10-28 22:50:43,826 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 118 transitions. [2021-10-28 22:50:43,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-10-28 22:50:43,826 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:50:43,827 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:50:43,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-28 22:50:44,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:50:44,033 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 22:50:44,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:50:44,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1237454384, now seen corresponding path program 1 times [2021-10-28 22:50:44,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:50:44,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880052942] [2021-10-28 22:50:44,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:50:44,033 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:50:44,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:44,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:50:44,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:44,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:50:44,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:44,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 22:50:44,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:44,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 22:50:44,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:44,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 22:50:44,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:44,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-10-28 22:50:44,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:44,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-10-28 22:50:44,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:44,170 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-28 22:50:44,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:50:44,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880052942] [2021-10-28 22:50:44,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880052942] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:50:44,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6799408] [2021-10-28 22:50:44,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:50:44,171 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:50:44,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:50:44,173 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:50:44,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-28 22:50:44,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:44,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 22:50:44,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:50:44,764 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-28 22:50:44,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6799408] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:50:44,764 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 22:50:44,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2021-10-28 22:50:44,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558216011] [2021-10-28 22:50:44,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 22:50:44,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:50:44,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 22:50:44,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-10-28 22:50:44,766 INFO L87 Difference]: Start difference. First operand 112 states and 118 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-10-28 22:50:44,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:50:44,819 INFO L93 Difference]: Finished difference Result 117 states and 121 transitions. [2021-10-28 22:50:44,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 22:50:44,820 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 64 [2021-10-28 22:50:44,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:50:44,821 INFO L225 Difference]: With dead ends: 117 [2021-10-28 22:50:44,821 INFO L226 Difference]: Without dead ends: 114 [2021-10-28 22:50:44,821 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-10-28 22:50:44,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-10-28 22:50:44,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2021-10-28 22:50:44,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 78 states have (on average 1.2564102564102564) internal successors, (98), 93 states have internal predecessors, (98), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-28 22:50:44,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 117 transitions. [2021-10-28 22:50:44,825 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 117 transitions. Word has length 64 [2021-10-28 22:50:44,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:50:44,826 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 117 transitions. [2021-10-28 22:50:44,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-10-28 22:50:44,826 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 117 transitions. [2021-10-28 22:50:44,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-10-28 22:50:44,827 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:50:44,827 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:50:44,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-28 22:50:45,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:50:45,027 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 22:50:45,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:50:45,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1206656096, now seen corresponding path program 1 times [2021-10-28 22:50:45,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:50:45,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104895742] [2021-10-28 22:50:45,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:50:45,029 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:50:45,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:45,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:50:45,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:45,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:50:45,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:45,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 22:50:45,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:45,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 22:50:45,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:45,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 22:50:45,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:45,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-10-28 22:50:45,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:46,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-10-28 22:50:46,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:46,153 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 22:50:46,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:50:46,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104895742] [2021-10-28 22:50:46,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104895742] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:50:46,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441476379] [2021-10-28 22:50:46,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:50:46,154 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:50:46,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:50:46,155 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:50:46,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-28 22:50:46,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:46,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 103 conjunts are in the unsatisfiable core [2021-10-28 22:50:46,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:50:46,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 22:50:46,783 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 22:50:46,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 22:50:46,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 22:50:47,028 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-28 22:50:47,028 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 28 treesize of output 22 [2021-10-28 22:50:47,503 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 13 treesize of output 9 [2021-10-28 22:50:47,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 22:50:47,604 INFO L354 Elim1Store]: treesize reduction 47, result has 13.0 percent of original size [2021-10-28 22:50:47,605 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 39 treesize of output 25 [2021-10-28 22:50:48,820 WARN L860 $PredicateComparison]: unable to prove that (exists ((sll_circular_update_at_~head.offset Int) (sll_circular_update_at_~data Int)) (= |c_#memory_int| (let ((.cse0 (select (select |c_old(#memory_$Pointer$.base)| |c_sll_circular_update_at_#in~head.base|) |c_sll_circular_update_at_#in~head.offset|))) (store |c_old(#memory_int)| .cse0 (store (select |c_old(#memory_int)| .cse0) (+ sll_circular_update_at_~head.offset 4) sll_circular_update_at_~data))))) is different from true [2021-10-28 22:50:48,846 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 22:50:48,846 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 33 [2021-10-28 22:50:48,861 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-10-28 22:50:48,862 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-10-28 22:50:49,496 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-10-28 22:50:49,497 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 40 treesize of output 22 [2021-10-28 22:50:49,547 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-10-28 22:50:49,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441476379] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:50:49,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:50:49,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 36] total 63 [2021-10-28 22:50:49,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637535184] [2021-10-28 22:50:49,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-10-28 22:50:49,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:50:49,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-10-28 22:50:49,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=3593, Unknown=1, NotChecked=120, Total=3906 [2021-10-28 22:50:49,551 INFO L87 Difference]: Start difference. First operand 112 states and 117 transitions. Second operand has 63 states, 58 states have (on average 1.603448275862069) internal successors, (93), 50 states have internal predecessors, (93), 10 states have call successors, (15), 8 states have call predecessors, (15), 11 states have return successors, (12), 12 states have call predecessors, (12), 10 states have call successors, (12) [2021-10-28 22:50:59,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:50:59,189 INFO L93 Difference]: Finished difference Result 135 states and 140 transitions. [2021-10-28 22:50:59,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-28 22:50:59,189 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 58 states have (on average 1.603448275862069) internal successors, (93), 50 states have internal predecessors, (93), 10 states have call successors, (15), 8 states have call predecessors, (15), 11 states have return successors, (12), 12 states have call predecessors, (12), 10 states have call successors, (12) Word has length 67 [2021-10-28 22:50:59,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:50:59,190 INFO L225 Difference]: With dead ends: 135 [2021-10-28 22:50:59,190 INFO L226 Difference]: Without dead ends: 135 [2021-10-28 22:50:59,193 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1648 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=477, Invalid=7172, Unknown=11, NotChecked=172, Total=7832 [2021-10-28 22:50:59,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-10-28 22:50:59,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 112. [2021-10-28 22:50:59,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 78 states have (on average 1.2435897435897436) internal successors, (97), 93 states have internal predecessors, (97), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-28 22:50:59,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2021-10-28 22:50:59,198 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 67 [2021-10-28 22:50:59,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:50:59,199 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2021-10-28 22:50:59,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 58 states have (on average 1.603448275862069) internal successors, (93), 50 states have internal predecessors, (93), 10 states have call successors, (15), 8 states have call predecessors, (15), 11 states have return successors, (12), 12 states have call predecessors, (12), 10 states have call successors, (12) [2021-10-28 22:50:59,199 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2021-10-28 22:50:59,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-10-28 22:50:59,200 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:50:59,200 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:50:59,228 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-10-28 22:50:59,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:50:59,413 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting sll_circular_get_data_atErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 22:50:59,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:50:59,413 INFO L85 PathProgramCache]: Analyzing trace with hash -2112045542, now seen corresponding path program 1 times [2021-10-28 22:50:59,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:50:59,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188184122] [2021-10-28 22:50:59,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:50:59,413 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:50:59,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:59,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:50:59,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:59,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:50:59,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:59,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 22:50:59,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:59,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 22:50:59,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:50:59,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 22:50:59,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:00,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-10-28 22:51:00,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:00,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-10-28 22:51:00,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:00,159 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-28 22:51:00,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:51:00,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188184122] [2021-10-28 22:51:00,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188184122] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:51:00,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013675162] [2021-10-28 22:51:00,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:00,159 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:51:00,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:51:00,160 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:51:00,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-28 22:51:00,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:00,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 76 conjunts are in the unsatisfiable core [2021-10-28 22:51:00,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:51:00,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 22:51:00,759 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 22:51:00,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 22:51:00,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 22:51:00,938 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-28 22:51:00,938 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 37 treesize of output 27 [2021-10-28 22:51:01,243 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 22:51:01,243 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 16 [2021-10-28 22:51:16,754 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-10-28 22:51:16,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 33 [2021-10-28 22:51:16,852 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 22:51:16,852 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 16 [2021-10-28 22:51:40,205 INFO L354 Elim1Store]: treesize reduction 66, result has 24.1 percent of original size [2021-10-28 22:51:40,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 51 [2021-10-28 22:51:44,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-28 22:51:44,216 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-28 22:51:44,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013675162] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:51:44,217 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:51:44,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 50 [2021-10-28 22:51:44,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624376770] [2021-10-28 22:51:44,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-10-28 22:51:44,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:51:44,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-10-28 22:51:44,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=2356, Unknown=40, NotChecked=0, Total=2550 [2021-10-28 22:51:44,220 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand has 51 states, 50 states have (on average 2.06) internal successors, (103), 39 states have internal predecessors, (103), 6 states have call successors, (16), 9 states have call predecessors, (16), 11 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2021-10-28 22:53:22,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:53:22,579 INFO L93 Difference]: Finished difference Result 144 states and 149 transitions. [2021-10-28 22:53:22,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-28 22:53:22,579 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 2.06) internal successors, (103), 39 states have internal predecessors, (103), 6 states have call successors, (16), 9 states have call predecessors, (16), 11 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) Word has length 75 [2021-10-28 22:53:22,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:53:22,580 INFO L225 Difference]: With dead ends: 144 [2021-10-28 22:53:22,580 INFO L226 Difference]: Without dead ends: 144 [2021-10-28 22:53:22,583 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 63 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 57.0s TimeCoverageRelationStatistics Valid=470, Invalid=5032, Unknown=48, NotChecked=0, Total=5550 [2021-10-28 22:53:22,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-10-28 22:53:22,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 116. [2021-10-28 22:53:22,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 82 states have (on average 1.2682926829268293) internal successors, (104), 97 states have internal predecessors, (104), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-28 22:53:22,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 123 transitions. [2021-10-28 22:53:22,588 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 123 transitions. Word has length 75 [2021-10-28 22:53:22,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:53:22,588 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 123 transitions. [2021-10-28 22:53:22,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 2.06) internal successors, (103), 39 states have internal predecessors, (103), 6 states have call successors, (16), 9 states have call predecessors, (16), 11 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2021-10-28 22:53:22,589 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 123 transitions. [2021-10-28 22:53:22,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-10-28 22:53:22,590 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:53:22,590 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:53:22,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-28 22:53:22,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-28 22:53:22,817 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting sll_circular_get_data_atErr3REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 22:53:22,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:53:22,817 INFO L85 PathProgramCache]: Analyzing trace with hash -2112045541, now seen corresponding path program 1 times [2021-10-28 22:53:22,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:53:22,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379240552] [2021-10-28 22:53:22,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:53:22,818 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:53:22,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:23,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:53:23,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:23,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:53:23,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:23,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 22:53:23,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:23,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 22:53:23,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:23,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 22:53:23,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:23,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-10-28 22:53:23,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:23,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-10-28 22:53:23,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:23,986 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-28 22:53:23,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:53:23,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379240552] [2021-10-28 22:53:23,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379240552] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:53:23,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865868299] [2021-10-28 22:53:23,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:53:23,987 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:53:23,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:53:23,988 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:53:24,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-28 22:53:24,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:53:24,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 98 conjunts are in the unsatisfiable core [2021-10-28 22:53:24,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:53:24,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 22:53:24,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 22:53:24,969 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-28 22:53:24,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-10-28 22:53:24,980 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 22:53:24,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 22:53:25,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 22:53:25,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 22:53:25,274 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-28 22:53:25,274 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 63 treesize of output 45 [2021-10-28 22:53:25,290 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-28 22:53:25,291 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 50 [2021-10-28 22:53:25,781 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 22:53:25,781 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 35 [2021-10-28 22:53:25,787 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 22:53:25,788 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2021-10-28 22:53:29,809 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-10-28 22:53:29,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 66 [2021-10-28 22:53:29,830 INFO L354 Elim1Store]: treesize reduction 88, result has 17.8 percent of original size [2021-10-28 22:53:29,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 69 treesize of output 56 [2021-10-28 22:53:30,008 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 22:53:30,008 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 35 [2021-10-28 22:53:30,014 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 22:53:30,015 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2021-10-28 22:53:40,713 INFO L354 Elim1Store]: treesize reduction 66, result has 24.1 percent of original size [2021-10-28 22:53:40,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 109 treesize of output 84 [2021-10-28 22:53:40,735 INFO L354 Elim1Store]: treesize reduction 90, result has 21.7 percent of original size [2021-10-28 22:53:40,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 84 treesize of output 65 [2021-10-28 22:53:41,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-10-28 22:53:41,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-10-28 22:53:41,600 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-28 22:53:41,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865868299] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:53:41,600 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:53:41,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 29] total 59 [2021-10-28 22:53:41,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771449556] [2021-10-28 22:53:41,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-10-28 22:53:41,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:53:41,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-10-28 22:53:41,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=3342, Unknown=7, NotChecked=0, Total=3540 [2021-10-28 22:53:41,602 INFO L87 Difference]: Start difference. First operand 116 states and 123 transitions. Second operand has 60 states, 59 states have (on average 1.9152542372881356) internal successors, (113), 47 states have internal predecessors, (113), 8 states have call successors, (16), 9 states have call predecessors, (16), 12 states have return successors, (13), 11 states have call predecessors, (13), 8 states have call successors, (13) [2021-10-28 22:54:08,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:54:08,343 INFO L93 Difference]: Finished difference Result 142 states and 148 transitions. [2021-10-28 22:54:08,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-28 22:54:08,343 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 1.9152542372881356) internal successors, (113), 47 states have internal predecessors, (113), 8 states have call successors, (16), 9 states have call predecessors, (16), 12 states have return successors, (13), 11 states have call predecessors, (13), 8 states have call successors, (13) Word has length 75 [2021-10-28 22:54:08,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:54:08,344 INFO L225 Difference]: With dead ends: 142 [2021-10-28 22:54:08,345 INFO L226 Difference]: Without dead ends: 142 [2021-10-28 22:54:08,347 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1291 ImplicationChecksByTransitivity, 20.9s TimeCoverageRelationStatistics Valid=486, Invalid=6479, Unknown=7, NotChecked=0, Total=6972 [2021-10-28 22:54:08,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-10-28 22:54:08,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 115. [2021-10-28 22:54:08,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 81 states have (on average 1.2469135802469136) internal successors, (101), 96 states have internal predecessors, (101), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-28 22:54:08,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 120 transitions. [2021-10-28 22:54:08,351 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 120 transitions. Word has length 75 [2021-10-28 22:54:08,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:54:08,352 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 120 transitions. [2021-10-28 22:54:08,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 1.9152542372881356) internal successors, (113), 47 states have internal predecessors, (113), 8 states have call successors, (16), 9 states have call predecessors, (16), 12 states have return successors, (13), 11 states have call predecessors, (13), 8 states have call successors, (13) [2021-10-28 22:54:08,352 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 120 transitions. [2021-10-28 22:54:08,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-10-28 22:54:08,353 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:54:08,353 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:54:08,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-28 22:54:08,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:54:08,554 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 22:54:08,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:54:08,554 INFO L85 PathProgramCache]: Analyzing trace with hash -32108403, now seen corresponding path program 1 times [2021-10-28 22:54:08,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:54:08,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623435388] [2021-10-28 22:54:08,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:54:08,555 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:54:08,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:08,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:54:08,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:08,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:54:08,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:08,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 22:54:08,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:08,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 22:54:08,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:08,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 22:54:08,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:08,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-10-28 22:54:08,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:08,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-10-28 22:54:08,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:08,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-10-28 22:54:08,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:08,675 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-28 22:54:08,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:54:08,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623435388] [2021-10-28 22:54:08,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623435388] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:54:08,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973513820] [2021-10-28 22:54:08,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:54:08,677 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:54:08,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:54:08,681 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:54:08,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-28 22:54:09,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:09,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 22:54:09,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:54:09,680 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-28 22:54:09,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973513820] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:54:09,681 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 22:54:09,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2021-10-28 22:54:09,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162564940] [2021-10-28 22:54:09,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 22:54:09,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:54:09,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 22:54:09,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-10-28 22:54:09,682 INFO L87 Difference]: Start difference. First operand 115 states and 120 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-10-28 22:54:09,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:54:09,732 INFO L93 Difference]: Finished difference Result 119 states and 123 transitions. [2021-10-28 22:54:09,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 22:54:09,733 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 78 [2021-10-28 22:54:09,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:54:09,734 INFO L225 Difference]: With dead ends: 119 [2021-10-28 22:54:09,734 INFO L226 Difference]: Without dead ends: 115 [2021-10-28 22:54:09,734 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-10-28 22:54:09,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-10-28 22:54:09,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2021-10-28 22:54:09,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 81 states have (on average 1.2345679012345678) internal successors, (100), 96 states have internal predecessors, (100), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-28 22:54:09,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 119 transitions. [2021-10-28 22:54:09,738 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 119 transitions. Word has length 78 [2021-10-28 22:54:09,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:54:09,739 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 119 transitions. [2021-10-28 22:54:09,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-10-28 22:54:09,739 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 119 transitions. [2021-10-28 22:54:09,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-10-28 22:54:09,740 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:54:09,740 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:54:09,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-28 22:54:09,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-28 22:54:09,941 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting sll_circular_get_data_atErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 22:54:09,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:54:09,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1323929965, now seen corresponding path program 2 times [2021-10-28 22:54:09,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:54:09,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346820091] [2021-10-28 22:54:09,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:54:09,942 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:54:09,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:10,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:54:10,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:10,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:54:10,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:10,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 22:54:10,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:10,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 22:54:10,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:10,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 22:54:10,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:10,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-10-28 22:54:10,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:10,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-10-28 22:54:10,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:10,077 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-10-28 22:54:10,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:54:10,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346820091] [2021-10-28 22:54:10,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346820091] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:54:10,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853056577] [2021-10-28 22:54:10,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 22:54:10,078 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:54:10,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:54:10,079 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:54:10,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-28 22:54:10,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 22:54:10,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:54:10,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 22:54:10,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:54:11,090 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-28 22:54:11,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853056577] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:54:11,090 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:54:11,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 11 [2021-10-28 22:54:11,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680819365] [2021-10-28 22:54:11,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 22:54:11,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:54:11,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 22:54:11,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-10-28 22:54:11,092 INFO L87 Difference]: Start difference. First operand 115 states and 119 transitions. Second operand has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 7 states have internal predecessors, (65), 4 states have call successors, (14), 5 states have call predecessors, (14), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-10-28 22:54:11,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:54:11,505 INFO L93 Difference]: Finished difference Result 125 states and 128 transitions. [2021-10-28 22:54:11,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 22:54:11,506 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 7 states have internal predecessors, (65), 4 states have call successors, (14), 5 states have call predecessors, (14), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 78 [2021-10-28 22:54:11,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:54:11,506 INFO L225 Difference]: With dead ends: 125 [2021-10-28 22:54:11,507 INFO L226 Difference]: Without dead ends: 125 [2021-10-28 22:54:11,507 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-10-28 22:54:11,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-10-28 22:54:11,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 106. [2021-10-28 22:54:11,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 76 states have (on average 1.1710526315789473) internal successors, (89), 87 states have internal predecessors, (89), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-28 22:54:11,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2021-10-28 22:54:11,511 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 78 [2021-10-28 22:54:11,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:54:11,512 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2021-10-28 22:54:11,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 7 states have internal predecessors, (65), 4 states have call successors, (14), 5 states have call predecessors, (14), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-10-28 22:54:11,512 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2021-10-28 22:54:11,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-10-28 22:54:11,513 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:54:11,513 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:54:11,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-28 22:54:11,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-28 22:54:11,733 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 22:54:11,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:54:11,733 INFO L85 PathProgramCache]: Analyzing trace with hash -841344934, now seen corresponding path program 1 times [2021-10-28 22:54:11,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:54:11,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971660464] [2021-10-28 22:54:11,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:54:11,734 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:54:11,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:11,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:54:11,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:12,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:54:12,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:12,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 22:54:12,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:12,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 22:54:12,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:12,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 22:54:12,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:12,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-10-28 22:54:12,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:12,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-10-28 22:54:12,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:12,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-10-28 22:54:12,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:13,029 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-28 22:54:13,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:54:13,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971660464] [2021-10-28 22:54:13,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971660464] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:54:13,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521377844] [2021-10-28 22:54:13,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:54:13,030 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:54:13,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:54:13,034 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:54:13,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-28 22:54:13,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:54:13,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 108 conjunts are in the unsatisfiable core [2021-10-28 22:54:13,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:54:13,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 22:54:13,969 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 22:54:13,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 22:54:14,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 22:54:14,161 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-28 22:54:14,161 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 28 treesize of output 22 [2021-10-28 22:54:15,317 WARN L860 $PredicateComparison]: unable to prove that (exists ((sll_circular_update_at_~head.offset Int)) (and (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_sll_circular_update_at_#in~head.base| (let ((.cse0 (+ sll_circular_update_at_~head.offset 4))) (store (select |c_old(#memory_$Pointer$.base)| |c_sll_circular_update_at_#in~head.base|) .cse0 (select (select |c_#memory_$Pointer$.base| |c_sll_circular_update_at_#in~head.base|) .cse0))))) (<= |c_sll_circular_update_at_#in~head.offset| sll_circular_update_at_~head.offset))) is different from true [2021-10-28 22:54:15,350 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-10-28 22:54:15,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 28 [2021-10-28 22:54:15,692 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 25 treesize of output 17 [2021-10-28 22:54:15,824 INFO L354 Elim1Store]: treesize reduction 86, result has 22.5 percent of original size [2021-10-28 22:54:15,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 117 treesize of output 100 [2021-10-28 22:54:15,833 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-10-28 22:54:15,834 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 88 treesize of output 74 [2021-10-28 22:54:18,002 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~s~0.base_BEFORE_CALL_21 Int) (v_main_~s~0.offset_BEFORE_CALL_21 Int)) (not (= v_main_~s~0.base_BEFORE_CALL_21 (select (select |c_#memory_$Pointer$.base| v_main_~s~0.base_BEFORE_CALL_21) v_main_~s~0.offset_BEFORE_CALL_21)))) is different from true [2021-10-28 22:54:20,273 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~s~0.base_BEFORE_CALL_22 Int) (v_main_~s~0.offset_BEFORE_CALL_22 Int)) (not (= (select (select |c_#memory_$Pointer$.base| v_main_~s~0.base_BEFORE_CALL_22) v_main_~s~0.offset_BEFORE_CALL_22) v_main_~s~0.base_BEFORE_CALL_22))) is different from true [2021-10-28 22:54:34,792 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 22:54:34,792 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 51 treesize of output 47 [2021-10-28 22:54:34,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2021-10-28 22:54:34,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-10-28 22:54:34,824 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 9 not checked. [2021-10-28 22:54:34,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521377844] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:54:34,824 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:54:34,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 73 [2021-10-28 22:54:34,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629169325] [2021-10-28 22:54:34,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-10-28 22:54:34,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:54:34,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-10-28 22:54:34,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=4652, Unknown=5, NotChecked=414, Total=5256 [2021-10-28 22:54:34,827 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand has 73 states, 69 states have (on average 1.7536231884057971) internal successors, (121), 59 states have internal predecessors, (121), 11 states have call successors, (17), 9 states have call predecessors, (17), 14 states have return successors, (15), 14 states have call predecessors, (15), 11 states have call successors, (15) [2021-10-28 22:55:11,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:11,418 INFO L93 Difference]: Finished difference Result 123 states and 126 transitions. [2021-10-28 22:55:11,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-28 22:55:11,419 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 69 states have (on average 1.7536231884057971) internal successors, (121), 59 states have internal predecessors, (121), 11 states have call successors, (17), 9 states have call predecessors, (17), 14 states have return successors, (15), 14 states have call predecessors, (15), 11 states have call successors, (15) Word has length 81 [2021-10-28 22:55:11,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:11,420 INFO L225 Difference]: With dead ends: 123 [2021-10-28 22:55:11,420 INFO L226 Difference]: Without dead ends: 123 [2021-10-28 22:55:11,424 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 104 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1613 ImplicationChecksByTransitivity, 55.5s TimeCoverageRelationStatistics Valid=500, Invalid=10009, Unknown=9, NotChecked=612, Total=11130 [2021-10-28 22:55:11,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-10-28 22:55:11,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 104. [2021-10-28 22:55:11,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 75 states have (on average 1.16) internal successors, (87), 85 states have internal predecessors, (87), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-28 22:55:11,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2021-10-28 22:55:11,429 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 81 [2021-10-28 22:55:11,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:11,430 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2021-10-28 22:55:11,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 69 states have (on average 1.7536231884057971) internal successors, (121), 59 states have internal predecessors, (121), 11 states have call successors, (17), 9 states have call predecessors, (17), 14 states have return successors, (15), 14 states have call predecessors, (15), 11 states have call successors, (15) [2021-10-28 22:55:11,430 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2021-10-28 22:55:11,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-10-28 22:55:11,431 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:11,431 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:55:11,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-28 22:55:11,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-28 22:55:11,646 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting sll_circular_destroyErr0REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 22:55:11,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:11,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1153762942, now seen corresponding path program 1 times [2021-10-28 22:55:11,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:55:11,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106518726] [2021-10-28 22:55:11,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:11,647 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:55:11,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:11,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:55:11,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:11,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:55:11,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:11,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 22:55:11,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:11,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 22:55:11,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:11,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 22:55:11,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:11,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-10-28 22:55:11,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:11,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-10-28 22:55:11,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:11,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-10-28 22:55:11,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:11,783 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-10-28 22:55:11,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:55:11,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106518726] [2021-10-28 22:55:11,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106518726] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:55:11,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981031805] [2021-10-28 22:55:11,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:11,784 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:55:11,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:55:11,785 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:55:11,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-28 22:55:12,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:12,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-28 22:55:12,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:55:12,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 22:55:13,179 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-28 22:55:13,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981031805] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:55:13,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 22:55:13,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [9] total 17 [2021-10-28 22:55:13,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358495333] [2021-10-28 22:55:13,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 22:55:13,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:55:13,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 22:55:13,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-10-28 22:55:13,181 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand has 13 states, 12 states have (on average 4.416666666666667) internal successors, (53), 10 states have internal predecessors, (53), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-10-28 22:55:13,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:13,450 INFO L93 Difference]: Finished difference Result 124 states and 126 transitions. [2021-10-28 22:55:13,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 22:55:13,451 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.416666666666667) internal successors, (53), 10 states have internal predecessors, (53), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 86 [2021-10-28 22:55:13,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:13,451 INFO L225 Difference]: With dead ends: 124 [2021-10-28 22:55:13,452 INFO L226 Difference]: Without dead ends: 124 [2021-10-28 22:55:13,452 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 83 SyntacticMatches, 7 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-10-28 22:55:13,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-10-28 22:55:13,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 107. [2021-10-28 22:55:13,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 79 states have (on average 1.1772151898734178) internal successors, (93), 88 states have internal predecessors, (93), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-28 22:55:13,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 112 transitions. [2021-10-28 22:55:13,456 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 112 transitions. Word has length 86 [2021-10-28 22:55:13,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:13,456 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 112 transitions. [2021-10-28 22:55:13,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.416666666666667) internal successors, (53), 10 states have internal predecessors, (53), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-10-28 22:55:13,457 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 112 transitions. [2021-10-28 22:55:13,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-10-28 22:55:13,458 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:13,458 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:55:13,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-28 22:55:13,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-28 22:55:13,673 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting sll_circular_destroyErr1REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 22:55:13,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:13,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1153762941, now seen corresponding path program 1 times [2021-10-28 22:55:13,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:55:13,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555716708] [2021-10-28 22:55:13,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:13,674 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:55:13,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:13,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:55:13,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:13,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:55:13,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:13,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 22:55:13,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:13,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 22:55:13,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:13,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 22:55:13,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:13,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-10-28 22:55:13,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:13,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-10-28 22:55:13,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:13,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-10-28 22:55:13,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:13,959 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-28 22:55:13,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:55:13,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555716708] [2021-10-28 22:55:13,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555716708] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:55:13,960 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:55:13,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-10-28 22:55:13,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034898484] [2021-10-28 22:55:13,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-28 22:55:13,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:55:13,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 22:55:13,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-10-28 22:55:13,962 INFO L87 Difference]: Start difference. First operand 107 states and 112 transitions. Second operand has 15 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 9 states have internal predecessors, (53), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-10-28 22:55:14,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:14,615 INFO L93 Difference]: Finished difference Result 118 states and 121 transitions. [2021-10-28 22:55:14,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-28 22:55:14,615 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 9 states have internal predecessors, (53), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 86 [2021-10-28 22:55:14,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:14,616 INFO L225 Difference]: With dead ends: 118 [2021-10-28 22:55:14,616 INFO L226 Difference]: Without dead ends: 118 [2021-10-28 22:55:14,617 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-10-28 22:55:14,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-10-28 22:55:14,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 105. [2021-10-28 22:55:14,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 79 states have (on average 1.139240506329114) internal successors, (90), 86 states have internal predecessors, (90), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-28 22:55:14,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2021-10-28 22:55:14,621 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 86 [2021-10-28 22:55:14,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:14,621 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2021-10-28 22:55:14,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 9 states have internal predecessors, (53), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-10-28 22:55:14,622 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2021-10-28 22:55:14,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-10-28 22:55:14,623 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:14,623 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:55:14,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-10-28 22:55:14,624 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting sll_circular_destroyErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 22:55:14,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:14,624 INFO L85 PathProgramCache]: Analyzing trace with hash 871538537, now seen corresponding path program 1 times [2021-10-28 22:55:14,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:55:14,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529957024] [2021-10-28 22:55:14,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:14,625 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:55:14,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:14,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:55:14,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:14,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:55:14,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:14,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 22:55:14,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:14,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 22:55:14,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:14,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 22:55:14,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:14,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-10-28 22:55:14,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:14,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-10-28 22:55:14,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:14,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-10-28 22:55:14,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:14,851 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-10-28 22:55:14,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:55:14,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529957024] [2021-10-28 22:55:14,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529957024] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:55:14,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527541306] [2021-10-28 22:55:14,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:14,852 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:55:14,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:55:14,853 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:55:14,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-28 22:55:15,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:15,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 52 conjunts are in the unsatisfiable core [2021-10-28 22:55:15,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:55:16,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-10-28 22:55:16,247 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-28 22:55:16,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527541306] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:55:16,247 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:55:16,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 24 [2021-10-28 22:55:16,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388613969] [2021-10-28 22:55:16,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-28 22:55:16,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:55:16,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-28 22:55:16,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=548, Unknown=0, NotChecked=0, Total=600 [2021-10-28 22:55:16,249 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand has 25 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 18 states have internal predecessors, (91), 4 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (12), 6 states have call predecessors, (12), 2 states have call successors, (12) [2021-10-28 22:55:17,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:17,091 INFO L93 Difference]: Finished difference Result 118 states and 120 transitions. [2021-10-28 22:55:17,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-28 22:55:17,093 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 18 states have internal predecessors, (91), 4 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (12), 6 states have call predecessors, (12), 2 states have call successors, (12) Word has length 89 [2021-10-28 22:55:17,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:17,094 INFO L225 Difference]: With dead ends: 118 [2021-10-28 22:55:17,095 INFO L226 Difference]: Without dead ends: 118 [2021-10-28 22:55:17,095 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=157, Invalid=1325, Unknown=0, NotChecked=0, Total=1482 [2021-10-28 22:55:17,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-10-28 22:55:17,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 105. [2021-10-28 22:55:17,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 80 states have (on average 1.1375) internal successors, (91), 86 states have internal predecessors, (91), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-28 22:55:17,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 110 transitions. [2021-10-28 22:55:17,099 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 110 transitions. Word has length 89 [2021-10-28 22:55:17,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:17,100 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 110 transitions. [2021-10-28 22:55:17,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 18 states have internal predecessors, (91), 4 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (12), 6 states have call predecessors, (12), 2 states have call successors, (12) [2021-10-28 22:55:17,100 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 110 transitions. [2021-10-28 22:55:17,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-10-28 22:55:17,101 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:17,101 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:55:17,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-28 22:55:17,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:55:17,309 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting sll_circular_destroyErr3REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 22:55:17,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:17,309 INFO L85 PathProgramCache]: Analyzing trace with hash 871538538, now seen corresponding path program 1 times [2021-10-28 22:55:17,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:55:17,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137038663] [2021-10-28 22:55:17,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:17,309 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:55:17,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:17,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:55:17,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:17,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:55:17,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:17,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 22:55:17,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:17,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 22:55:17,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:17,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 22:55:17,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:18,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-10-28 22:55:18,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:18,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-10-28 22:55:18,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:18,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-10-28 22:55:18,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:18,480 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-28 22:55:18,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:55:18,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137038663] [2021-10-28 22:55:18,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137038663] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:55:18,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506270135] [2021-10-28 22:55:18,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:18,481 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:55:18,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:55:18,482 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:55:18,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-28 22:55:19,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:19,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 113 conjunts are in the unsatisfiable core [2021-10-28 22:55:19,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:55:19,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 22:55:19,583 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 22:55:19,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 22:55:19,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 22:55:19,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 22:55:19,856 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-28 22:55:19,856 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 63 treesize of output 49 [2021-10-28 22:55:19,867 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-28 22:55:19,868 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 50 [2021-10-28 22:55:22,076 WARN L860 $PredicateComparison]: unable to prove that (exists ((sll_circular_update_at_~head.offset Int)) (let ((.cse0 (+ sll_circular_update_at_~head.offset 4))) (and (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_sll_circular_update_at_#in~head.base| (store (select |c_old(#memory_$Pointer$.offset)| |c_sll_circular_update_at_#in~head.base|) .cse0 (select (select |c_#memory_$Pointer$.offset| |c_sll_circular_update_at_#in~head.base|) .cse0)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_sll_circular_update_at_#in~head.base| (store (select |c_old(#memory_$Pointer$.base)| |c_sll_circular_update_at_#in~head.base|) .cse0 (select (select |c_#memory_$Pointer$.base| |c_sll_circular_update_at_#in~head.base|) .cse0)))) (<= |c_sll_circular_update_at_#in~head.offset| sll_circular_update_at_~head.offset)))) is different from true [2021-10-28 22:55:22,143 INFO L354 Elim1Store]: treesize reduction 66, result has 24.1 percent of original size [2021-10-28 22:55:22,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 96 treesize of output 80 [2021-10-28 22:55:22,169 INFO L354 Elim1Store]: treesize reduction 66, result has 24.1 percent of original size [2021-10-28 22:55:22,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 74 treesize of output 63 [2021-10-28 22:55:23,997 WARN L860 $PredicateComparison]: unable to prove that (exists ((sll_circular_update_at_~head.offset Int)) (= |c_#memory_$Pointer$.offset| (let ((.cse0 (select (select |c_old(#memory_$Pointer$.base)| |c_sll_circular_update_at_#in~head.base|) |c_sll_circular_update_at_#in~head.offset|))) (store |c_old(#memory_$Pointer$.offset)| .cse0 (let ((.cse1 (+ sll_circular_update_at_~head.offset 4))) (store (select |c_old(#memory_$Pointer$.offset)| .cse0) .cse1 (select (select |c_#memory_$Pointer$.offset| .cse0) .cse1))))))) is different from true [2021-10-28 22:55:24,046 INFO L354 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2021-10-28 22:55:24,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 72 [2021-10-28 22:55:24,080 INFO L354 Elim1Store]: treesize reduction 60, result has 36.8 percent of original size [2021-10-28 22:55:24,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 69 treesize of output 72 [2021-10-28 22:55:29,276 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-10-28 22:55:29,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 81 treesize of output 64 [2021-10-28 22:55:29,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2021-10-28 22:55:29,444 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 2 not checked. [2021-10-28 22:55:29,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506270135] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:55:29,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:55:29,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 34] total 65 [2021-10-28 22:55:29,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184599023] [2021-10-28 22:55:29,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-10-28 22:55:29,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:55:29,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-10-28 22:55:29,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=3857, Unknown=2, NotChecked=250, Total=4290 [2021-10-28 22:55:29,446 INFO L87 Difference]: Start difference. First operand 105 states and 110 transitions. Second operand has 66 states, 65 states have (on average 1.9230769230769231) internal successors, (125), 53 states have internal predecessors, (125), 11 states have call successors, (17), 8 states have call predecessors, (17), 12 states have return successors, (15), 13 states have call predecessors, (15), 9 states have call successors, (15) [2021-10-28 22:55:40,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:40,185 INFO L93 Difference]: Finished difference Result 115 states and 118 transitions. [2021-10-28 22:55:40,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-28 22:55:40,186 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 1.9230769230769231) internal successors, (125), 53 states have internal predecessors, (125), 11 states have call successors, (17), 8 states have call predecessors, (17), 12 states have return successors, (15), 13 states have call predecessors, (15), 9 states have call successors, (15) Word has length 89 [2021-10-28 22:55:40,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:40,186 INFO L225 Difference]: With dead ends: 115 [2021-10-28 22:55:40,187 INFO L226 Difference]: Without dead ends: 115 [2021-10-28 22:55:40,188 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1553 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=497, Invalid=7879, Unknown=4, NotChecked=362, Total=8742 [2021-10-28 22:55:40,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-10-28 22:55:40,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 107. [2021-10-28 22:55:40,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 82 states have (on average 1.1219512195121952) internal successors, (92), 88 states have internal predecessors, (92), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-28 22:55:40,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2021-10-28 22:55:40,192 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 89 [2021-10-28 22:55:40,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:40,193 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2021-10-28 22:55:40,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 65 states have (on average 1.9230769230769231) internal successors, (125), 53 states have internal predecessors, (125), 11 states have call successors, (17), 8 states have call predecessors, (17), 12 states have return successors, (15), 13 states have call predecessors, (15), 9 states have call successors, (15) [2021-10-28 22:55:40,193 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2021-10-28 22:55:40,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-10-28 22:55:40,194 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:40,195 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:55:40,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-28 22:55:40,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-10-28 22:55:40,401 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr1ENSURES_VIOLATIONMEMORY_LEAK === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 22:55:40,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:40,401 INFO L85 PathProgramCache]: Analyzing trace with hash 904070889, now seen corresponding path program 1 times [2021-10-28 22:55:40,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:55:40,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802530237] [2021-10-28 22:55:40,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:40,401 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:55:40,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:40,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:55:40,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:40,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:55:40,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:40,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 22:55:40,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:40,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 22:55:40,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:40,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 22:55:40,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:40,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-10-28 22:55:40,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:40,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-10-28 22:55:40,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:40,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-10-28 22:55:40,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:40,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-10-28 22:55:40,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:40,606 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-28 22:55:40,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:55:40,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802530237] [2021-10-28 22:55:40,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802530237] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:55:40,607 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:55:40,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-10-28 22:55:40,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743533432] [2021-10-28 22:55:40,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-28 22:55:40,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:55:40,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-28 22:55:40,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-10-28 22:55:40,609 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 10 states have internal predecessors, (55), 2 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 2 states have call successors, (7) [2021-10-28 22:55:41,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:41,017 INFO L93 Difference]: Finished difference Result 113 states and 115 transitions. [2021-10-28 22:55:41,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-28 22:55:41,018 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 10 states have internal predecessors, (55), 2 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 2 states have call successors, (7) Word has length 89 [2021-10-28 22:55:41,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:41,019 INFO L225 Difference]: With dead ends: 113 [2021-10-28 22:55:41,019 INFO L226 Difference]: Without dead ends: 111 [2021-10-28 22:55:41,019 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-10-28 22:55:41,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-10-28 22:55:41,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2021-10-28 22:55:41,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 82 states have (on average 1.1097560975609757) internal successors, (91), 88 states have internal predecessors, (91), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-28 22:55:41,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 110 transitions. [2021-10-28 22:55:41,023 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 110 transitions. Word has length 89 [2021-10-28 22:55:41,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:41,024 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 110 transitions. [2021-10-28 22:55:41,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 10 states have internal predecessors, (55), 2 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 2 states have call successors, (7) [2021-10-28 22:55:41,024 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 110 transitions. [2021-10-28 22:55:41,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-10-28 22:55:41,025 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:41,026 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:55:41,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-10-28 22:55:41,026 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting sll_circular_destroyErr8ASSERT_VIOLATIONMEMORY_FREE === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 22:55:41,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:41,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1247889481, now seen corresponding path program 1 times [2021-10-28 22:55:41,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:55:41,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37952427] [2021-10-28 22:55:41,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:41,027 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:55:41,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:41,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:55:41,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:41,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:55:41,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:41,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 22:55:41,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:41,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 22:55:41,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:41,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 22:55:41,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:41,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-10-28 22:55:41,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:41,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-10-28 22:55:41,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:41,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-10-28 22:55:41,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:41,250 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-28 22:55:41,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:55:41,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37952427] [2021-10-28 22:55:41,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37952427] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:55:41,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:55:41,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-10-28 22:55:41,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869016124] [2021-10-28 22:55:41,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-28 22:55:41,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:55:41,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 22:55:41,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-10-28 22:55:41,252 INFO L87 Difference]: Start difference. First operand 107 states and 110 transitions. Second operand has 15 states, 14 states have (on average 4.071428571428571) internal successors, (57), 9 states have internal predecessors, (57), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-10-28 22:55:41,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:41,794 INFO L93 Difference]: Finished difference Result 109 states and 111 transitions. [2021-10-28 22:55:41,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-28 22:55:41,795 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.071428571428571) internal successors, (57), 9 states have internal predecessors, (57), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 90 [2021-10-28 22:55:41,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:41,795 INFO L225 Difference]: With dead ends: 109 [2021-10-28 22:55:41,796 INFO L226 Difference]: Without dead ends: 109 [2021-10-28 22:55:41,796 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-10-28 22:55:41,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-10-28 22:55:41,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 106. [2021-10-28 22:55:41,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 82 states have (on average 1.0853658536585367) internal successors, (89), 87 states have internal predecessors, (89), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-28 22:55:41,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2021-10-28 22:55:41,800 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 90 [2021-10-28 22:55:41,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:41,800 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2021-10-28 22:55:41,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.071428571428571) internal successors, (57), 9 states have internal predecessors, (57), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-10-28 22:55:41,804 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2021-10-28 22:55:41,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-10-28 22:55:41,805 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:41,806 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:55:41,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-10-28 22:55:41,806 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting sll_circular_destroyErr5ASSERT_VIOLATIONMEMORY_FREE === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 22:55:41,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:41,807 INFO L85 PathProgramCache]: Analyzing trace with hash 927337902, now seen corresponding path program 1 times [2021-10-28 22:55:41,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:55:41,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670985421] [2021-10-28 22:55:41,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:41,809 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:55:41,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:41,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:55:41,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:42,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:55:42,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:42,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 22:55:42,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:42,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 22:55:42,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:42,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 22:55:42,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:42,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-10-28 22:55:42,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:42,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-10-28 22:55:42,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:42,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-10-28 22:55:42,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:42,658 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-28 22:55:42,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:55:42,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670985421] [2021-10-28 22:55:42,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670985421] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:55:42,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647694489] [2021-10-28 22:55:42,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:42,659 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:55:42,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:55:42,660 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:55:42,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-28 22:55:43,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:43,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 83 conjunts are in the unsatisfiable core [2021-10-28 22:55:43,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:55:43,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 22:55:43,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-10-28 22:55:43,773 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 22:55:43,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 22:55:43,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 22:55:43,901 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-28 22:55:43,901 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 37 treesize of output 27 [2021-10-28 22:55:44,142 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 22:55:44,142 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 16 [2021-10-28 22:55:45,013 WARN L860 $PredicateComparison]: unable to prove that (exists ((sll_circular_update_at_~head.offset Int)) (and (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_sll_circular_update_at_#in~head.base| (let ((.cse0 (+ sll_circular_update_at_~head.offset 4))) (store (select |c_old(#memory_$Pointer$.base)| |c_sll_circular_update_at_#in~head.base|) .cse0 (select (select |c_#memory_$Pointer$.base| |c_sll_circular_update_at_#in~head.base|) .cse0))))) (<= |c_sll_circular_update_at_#in~head.offset| sll_circular_update_at_~head.offset))) is different from true [2021-10-28 22:55:45,043 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-10-28 22:55:45,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 33 [2021-10-28 22:55:45,086 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 22:55:45,086 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 16 [2021-10-28 22:55:46,481 WARN L860 $PredicateComparison]: unable to prove that (exists ((sll_circular_update_at_~head.offset Int)) (= |c_#memory_$Pointer$.base| (let ((.cse0 (select (select |c_old(#memory_$Pointer$.base)| |c_sll_circular_update_at_#in~head.base|) |c_sll_circular_update_at_#in~head.offset|))) (store |c_old(#memory_$Pointer$.base)| .cse0 (let ((.cse1 (+ sll_circular_update_at_~head.offset 4))) (store (select |c_old(#memory_$Pointer$.base)| .cse0) .cse1 (select (select |c_#memory_$Pointer$.base| .cse0) .cse1))))))) is different from true [2021-10-28 22:55:46,521 INFO L354 Elim1Store]: treesize reduction 127, result has 15.9 percent of original size [2021-10-28 22:55:46,521 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 57 [2021-10-28 22:55:46,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-28 22:55:46,982 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 2 not checked. [2021-10-28 22:55:46,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647694489] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:55:46,982 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:55:46,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 45 [2021-10-28 22:55:46,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827386480] [2021-10-28 22:55:46,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-10-28 22:55:46,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:55:46,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-10-28 22:55:46,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1752, Unknown=2, NotChecked=170, Total=2070 [2021-10-28 22:55:46,985 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand has 46 states, 45 states have (on average 2.422222222222222) internal successors, (109), 35 states have internal predecessors, (109), 6 states have call successors, (16), 9 states have call predecessors, (16), 10 states have return successors, (11), 9 states have call predecessors, (11), 6 states have call successors, (11) [2021-10-28 22:55:52,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:52,401 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2021-10-28 22:55:52,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-28 22:55:52,402 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.422222222222222) internal successors, (109), 35 states have internal predecessors, (109), 6 states have call successors, (16), 9 states have call predecessors, (16), 10 states have return successors, (11), 9 states have call predecessors, (11), 6 states have call successors, (11) Word has length 92 [2021-10-28 22:55:52,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:52,403 INFO L225 Difference]: With dead ends: 110 [2021-10-28 22:55:52,403 INFO L226 Difference]: Without dead ends: 110 [2021-10-28 22:55:52,404 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 81 SyntacticMatches, 8 SemanticMatches, 66 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=432, Invalid=3864, Unknown=2, NotChecked=258, Total=4556 [2021-10-28 22:55:52,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-10-28 22:55:52,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2021-10-28 22:55:52,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 83 states have (on average 1.0843373493975903) internal successors, (90), 88 states have internal predecessors, (90), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-28 22:55:52,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 109 transitions. [2021-10-28 22:55:52,407 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 109 transitions. Word has length 92 [2021-10-28 22:55:52,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:52,408 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 109 transitions. [2021-10-28 22:55:52,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.422222222222222) internal successors, (109), 35 states have internal predecessors, (109), 6 states have call successors, (16), 9 states have call predecessors, (16), 10 states have return successors, (11), 9 states have call predecessors, (11), 6 states have call successors, (11) [2021-10-28 22:55:52,409 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 109 transitions. [2021-10-28 22:55:52,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-10-28 22:55:52,410 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:52,410 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:55:52,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-28 22:55:52,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-10-28 22:55:52,625 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting sll_circular_destroyErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 22:55:52,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:52,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1093942222, now seen corresponding path program 1 times [2021-10-28 22:55:52,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:55:52,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879514793] [2021-10-28 22:55:52,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:52,626 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:55:52,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:52,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:55:52,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:52,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:55:52,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:53,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 22:55:53,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:53,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 22:55:53,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:53,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 22:55:53,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:53,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-10-28 22:55:53,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:54,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-10-28 22:55:54,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:54,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-10-28 22:55:54,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:54,039 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-28 22:55:54,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:55:54,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879514793] [2021-10-28 22:55:54,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879514793] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:55:54,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686398683] [2021-10-28 22:55:54,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:54,040 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:55:54,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:55:54,049 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:55:54,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-28 22:55:55,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:55,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 113 conjunts are in the unsatisfiable core [2021-10-28 22:55:55,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:55:55,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 22:55:55,291 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 22:55:55,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 22:55:55,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 22:55:55,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 22:55:55,531 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-28 22:55:55,532 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 55 treesize of output 41 [2021-10-28 22:55:55,541 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-28 22:55:55,541 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 47 treesize of output 41 [2021-10-28 22:55:57,679 WARN L860 $PredicateComparison]: unable to prove that (exists ((sll_circular_update_at_~head.offset Int)) (let ((.cse0 (+ sll_circular_update_at_~head.offset 4))) (and (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_sll_circular_update_at_#in~head.base| (store (select |c_old(#memory_$Pointer$.offset)| |c_sll_circular_update_at_#in~head.base|) .cse0 (select (select |c_#memory_$Pointer$.offset| |c_sll_circular_update_at_#in~head.base|) .cse0)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_sll_circular_update_at_#in~head.base| (store (select |c_old(#memory_$Pointer$.base)| |c_sll_circular_update_at_#in~head.base|) .cse0 (select (select |c_#memory_$Pointer$.base| |c_sll_circular_update_at_#in~head.base|) .cse0)))) (<= |c_sll_circular_update_at_#in~head.offset| sll_circular_update_at_~head.offset)))) is different from true [2021-10-28 22:55:57,718 INFO L354 Elim1Store]: treesize reduction 88, result has 17.8 percent of original size [2021-10-28 22:55:57,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 66 [2021-10-28 22:55:57,737 INFO L354 Elim1Store]: treesize reduction 88, result has 17.8 percent of original size [2021-10-28 22:55:57,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 43 [2021-10-28 22:55:59,900 WARN L860 $PredicateComparison]: unable to prove that (exists ((sll_circular_update_at_~head.offset Int)) (let ((.cse0 (select (select |c_old(#memory_$Pointer$.base)| |c_sll_circular_update_at_#in~head.base|) |c_sll_circular_update_at_#in~head.offset|)) (.cse1 (+ sll_circular_update_at_~head.offset 4))) (and (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| .cse0 (store (select |c_old(#memory_$Pointer$.base)| .cse0) .cse1 (select (select |c_#memory_$Pointer$.base| .cse0) .cse1)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| .cse0 (store (select |c_old(#memory_$Pointer$.offset)| .cse0) .cse1 (select (select |c_#memory_$Pointer$.offset| .cse0) .cse1)))) (<= (select (select |c_old(#memory_$Pointer$.offset)| |c_sll_circular_update_at_#in~head.base|) |c_sll_circular_update_at_#in~head.offset|) sll_circular_update_at_~head.offset)))) is different from true [2021-10-28 22:55:59,952 INFO L354 Elim1Store]: treesize reduction 153, result has 12.6 percent of original size [2021-10-28 22:55:59,953 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 87 [2021-10-28 22:55:59,983 INFO L354 Elim1Store]: treesize reduction 165, result has 11.8 percent of original size [2021-10-28 22:55:59,983 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 77 treesize of output 50 [2021-10-28 22:56:02,608 INFO L354 Elim1Store]: treesize reduction 69, result has 9.2 percent of original size [2021-10-28 22:56:02,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 48 [2021-10-28 22:56:02,621 INFO L354 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2021-10-28 22:56:02,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 26 [2021-10-28 22:56:02,845 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 21 trivial. 2 not checked. [2021-10-28 22:56:02,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686398683] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:56:02,845 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:56:02,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 33] total 62 [2021-10-28 22:56:02,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494262047] [2021-10-28 22:56:02,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-10-28 22:56:02,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:56:02,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-10-28 22:56:02,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=3356, Unknown=2, NotChecked=234, Total=3782 [2021-10-28 22:56:02,848 INFO L87 Difference]: Start difference. First operand 107 states and 109 transitions. Second operand has 62 states, 62 states have (on average 2.0) internal successors, (124), 49 states have internal predecessors, (124), 7 states have call successors, (16), 9 states have call predecessors, (16), 11 states have return successors, (13), 10 states have call predecessors, (13), 7 states have call successors, (13) [2021-10-28 22:56:28,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:56:28,087 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2021-10-28 22:56:28,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-28 22:56:28,087 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.0) internal successors, (124), 49 states have internal predecessors, (124), 7 states have call successors, (16), 9 states have call predecessors, (16), 11 states have return successors, (13), 10 states have call predecessors, (13), 7 states have call successors, (13) Word has length 95 [2021-10-28 22:56:28,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:56:28,088 INFO L225 Difference]: With dead ends: 96 [2021-10-28 22:56:28,088 INFO L226 Difference]: Without dead ends: 96 [2021-10-28 22:56:28,090 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 77 SyntacticMatches, 3 SemanticMatches, 83 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1111 ImplicationChecksByTransitivity, 18.7s TimeCoverageRelationStatistics Valid=492, Invalid=6319, Unknown=3, NotChecked=326, Total=7140 [2021-10-28 22:56:28,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-10-28 22:56:28,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-10-28 22:56:28,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 76 states have (on average 1.013157894736842) internal successors, (77), 77 states have internal predecessors, (77), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-28 22:56:28,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2021-10-28 22:56:28,094 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 95 [2021-10-28 22:56:28,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:56:28,095 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2021-10-28 22:56:28,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.0) internal successors, (124), 49 states have internal predecessors, (124), 7 states have call successors, (16), 9 states have call predecessors, (16), 11 states have return successors, (13), 10 states have call predecessors, (13), 7 states have call successors, (13) [2021-10-28 22:56:28,095 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2021-10-28 22:56:28,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-10-28 22:56:28,097 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:56:28,097 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:56:28,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-28 22:56:28,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:56:28,325 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting sll_circular_destroyErr9ASSERT_VIOLATIONMEMORY_FREE === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 22:56:28,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:56:28,325 INFO L85 PathProgramCache]: Analyzing trace with hash -988555106, now seen corresponding path program 1 times [2021-10-28 22:56:28,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:56:28,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14731775] [2021-10-28 22:56:28,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:56:28,326 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:56:28,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:28,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:56:28,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:28,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:56:28,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:28,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 22:56:28,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:28,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 22:56:28,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:28,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 22:56:28,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:29,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-10-28 22:56:29,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:29,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-10-28 22:56:29,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:29,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-10-28 22:56:29,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:29,169 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-10-28 22:56:29,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:56:29,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14731775] [2021-10-28 22:56:29,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14731775] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:56:29,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408545740] [2021-10-28 22:56:29,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:56:29,170 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:56:29,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:56:29,171 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:56:29,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-28 22:56:30,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:30,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 22:56:30,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:56:30,774 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 22:56:30,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 26 [2021-10-28 22:56:30,954 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-10-28 22:56:30,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408545740] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:56:30,955 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:56:30,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 7] total 35 [2021-10-28 22:56:30,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369784290] [2021-10-28 22:56:30,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-28 22:56:30,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:56:30,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-28 22:56:30,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1167, Unknown=0, NotChecked=0, Total=1260 [2021-10-28 22:56:30,958 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand has 36 states, 35 states have (on average 3.2857142857142856) internal successors, (115), 29 states have internal predecessors, (115), 4 states have call successors, (16), 5 states have call predecessors, (16), 6 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-10-28 22:56:32,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:56:32,638 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2021-10-28 22:56:32,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-28 22:56:32,638 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 3.2857142857142856) internal successors, (115), 29 states have internal predecessors, (115), 4 states have call successors, (16), 5 states have call predecessors, (16), 6 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 97 [2021-10-28 22:56:32,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:56:32,639 INFO L225 Difference]: With dead ends: 95 [2021-10-28 22:56:32,639 INFO L226 Difference]: Without dead ends: 95 [2021-10-28 22:56:32,640 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=284, Invalid=2686, Unknown=0, NotChecked=0, Total=2970 [2021-10-28 22:56:32,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-10-28 22:56:32,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-10-28 22:56:32,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 76 states have (on average 1.0) internal successors, (76), 76 states have internal predecessors, (76), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-28 22:56:32,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2021-10-28 22:56:32,643 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 97 [2021-10-28 22:56:32,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:56:32,644 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2021-10-28 22:56:32,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 3.2857142857142856) internal successors, (115), 29 states have internal predecessors, (115), 4 states have call successors, (16), 5 states have call predecessors, (16), 6 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-10-28 22:56:32,644 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2021-10-28 22:56:32,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-10-28 22:56:32,646 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:56:32,646 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:56:32,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-28 22:56:32,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-10-28 22:56:32,865 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting mainErr1ENSURES_VIOLATIONMEMORY_LEAK === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 22:56:32,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:56:32,865 INFO L85 PathProgramCache]: Analyzing trace with hash -261539966, now seen corresponding path program 1 times [2021-10-28 22:56:32,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:56:32,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322918178] [2021-10-28 22:56:32,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:56:32,866 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:56:32,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:33,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:56:33,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:33,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:56:33,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:33,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 22:56:33,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:33,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 22:56:33,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:33,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 22:56:33,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:33,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-10-28 22:56:33,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:33,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-10-28 22:56:33,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:33,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-10-28 22:56:33,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:33,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-10-28 22:56:34,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:34,431 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-10-28 22:56:34,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:56:34,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322918178] [2021-10-28 22:56:34,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322918178] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:56:34,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194756935] [2021-10-28 22:56:34,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:56:34,432 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:56:34,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:56:34,434 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:56:34,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-28 22:56:35,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:35,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 87 conjunts are in the unsatisfiable core [2021-10-28 22:56:35,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:56:36,228 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-10-28 22:56:36,229 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 23 treesize of output 31 [2021-10-28 22:56:36,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 22:56:36,576 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-28 22:56:36,576 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 46 treesize of output 32 [2021-10-28 22:56:37,067 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 22:56:37,067 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 31 [2021-10-28 22:56:37,071 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-28 22:56:37,071 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 25 treesize of output 21 [2021-10-28 22:56:47,332 INFO L354 Elim1Store]: treesize reduction 66, result has 24.1 percent of original size [2021-10-28 22:56:47,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 44 [2021-10-28 22:56:47,656 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 22:56:47,656 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 40 [2021-10-28 22:56:47,666 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-28 22:56:47,666 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 37 treesize of output 33 [2021-10-28 22:56:48,493 INFO L354 Elim1Store]: treesize reduction 132, result has 15.4 percent of original size [2021-10-28 22:56:48,493 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 75 treesize of output 77 [2021-10-28 22:56:48,702 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 22:56:48,702 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 37 treesize of output 29 [2021-10-28 22:56:49,018 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 22:56:49,019 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 37 treesize of output 29 [2021-10-28 22:56:49,335 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 22:56:49,335 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 37 treesize of output 29 [2021-10-28 22:56:49,339 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 22:56:49,339 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 23 treesize of output 15 [2021-10-28 22:57:18,171 INFO L354 Elim1Store]: treesize reduction 17, result has 41.4 percent of original size [2021-10-28 22:57:18,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 64 treesize of output 55 [2021-10-28 22:57:18,182 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-10-28 22:57:18,183 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 46 treesize of output 43 [2021-10-28 22:57:18,310 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-28 22:57:18,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194756935] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:57:18,310 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:57:18,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 34] total 61 [2021-10-28 22:57:18,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359794312] [2021-10-28 22:57:18,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-10-28 22:57:18,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:57:18,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-10-28 22:57:18,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=3577, Unknown=15, NotChecked=0, Total=3782 [2021-10-28 22:57:18,312 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand has 62 states, 61 states have (on average 2.262295081967213) internal successors, (138), 52 states have internal predecessors, (138), 8 states have call successors, (17), 8 states have call predecessors, (17), 13 states have return successors, (14), 11 states have call predecessors, (14), 8 states have call successors, (14) [2021-10-28 22:58:02,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:58:02,941 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2021-10-28 22:58:02,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-28 22:58:02,942 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 2.262295081967213) internal successors, (138), 52 states have internal predecessors, (138), 8 states have call successors, (17), 8 states have call predecessors, (17), 13 states have return successors, (14), 11 states have call predecessors, (14), 8 states have call successors, (14) Word has length 101 [2021-10-28 22:58:02,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:58:02,943 INFO L225 Difference]: With dead ends: 94 [2021-10-28 22:58:02,943 INFO L226 Difference]: Without dead ends: 0 [2021-10-28 22:58:02,945 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 80 SyntacticMatches, 7 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1613 ImplicationChecksByTransitivity, 61.8s TimeCoverageRelationStatistics Valid=501, Invalid=7314, Unknown=17, NotChecked=0, Total=7832 [2021-10-28 22:58:02,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-28 22:58:02,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-28 22:58:02,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 22:58:02,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-28 22:58:02,946 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 101 [2021-10-28 22:58:02,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:58:02,946 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 22:58:02,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 2.262295081967213) internal successors, (138), 52 states have internal predecessors, (138), 8 states have call successors, (17), 8 states have call predecessors, (17), 13 states have return successors, (14), 11 states have call predecessors, (14), 8 states have call successors, (14) [2021-10-28 22:58:02,947 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-28 22:58:02,947 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-28 22:58:02,950 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr0REQUIRES_VIOLATION [2021-10-28 22:58:02,951 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr1REQUIRES_VIOLATION [2021-10-28 22:58:02,951 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr2REQUIRES_VIOLATION [2021-10-28 22:58:02,951 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr3REQUIRES_VIOLATION [2021-10-28 22:58:02,952 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONMEMORY_LEAK [2021-10-28 22:58:02,952 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1ENSURES_VIOLATIONMEMORY_LEAK [2021-10-28 22:58:02,952 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_update_atErr0REQUIRES_VIOLATION [2021-10-28 22:58:02,952 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_update_atErr1REQUIRES_VIOLATION [2021-10-28 22:58:02,953 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_update_atErr2REQUIRES_VIOLATION [2021-10-28 22:58:02,953 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_update_atErr3REQUIRES_VIOLATION [2021-10-28 22:58:02,953 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_destroyErr0REQUIRES_VIOLATION [2021-10-28 22:58:02,953 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_destroyErr1REQUIRES_VIOLATION [2021-10-28 22:58:02,953 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_destroyErr2REQUIRES_VIOLATION [2021-10-28 22:58:02,954 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_destroyErr3REQUIRES_VIOLATION [2021-10-28 22:58:02,954 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_destroyErr4ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 22:58:02,954 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_destroyErr5ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 22:58:02,954 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_destroyErr6ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 22:58:02,955 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_destroyErr7ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 22:58:02,955 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_destroyErr8ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 22:58:02,955 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_destroyErr9ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 22:58:02,955 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_createErr0REQUIRES_VIOLATION [2021-10-28 22:58:02,956 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_createErr1REQUIRES_VIOLATION [2021-10-28 22:58:02,956 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_createErr2REQUIRES_VIOLATION [2021-10-28 22:58:02,956 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_createErr3REQUIRES_VIOLATION [2021-10-28 22:58:02,956 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_get_data_atErr0REQUIRES_VIOLATION [2021-10-28 22:58:02,957 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_get_data_atErr1REQUIRES_VIOLATION [2021-10-28 22:58:02,957 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_get_data_atErr2REQUIRES_VIOLATION [2021-10-28 22:58:02,957 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_get_data_atErr3REQUIRES_VIOLATION [2021-10-28 22:58:03,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-28 22:58:03,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-10-28 22:58:03,175 INFO L731 BasicCegarLoop]: Path program histogram: [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:58:03,177 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 22:58:03,179 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 10:58:03 BoogieIcfgContainer [2021-10-28 22:58:03,179 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 22:58:03,180 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 22:58:03,180 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 22:58:03,180 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 22:58:03,181 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:49:25" (3/4) ... [2021-10-28 22:58:03,183 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-28 22:58:03,193 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2021-10-28 22:58:03,194 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-10-28 22:58:03,194 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure myexit [2021-10-28 22:58:03,194 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure sll_circular_get_data_at [2021-10-28 22:58:03,194 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2021-10-28 22:58:03,195 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2021-10-28 22:58:03,195 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure sll_circular_create [2021-10-28 22:58:03,195 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure sll_circular_destroy [2021-10-28 22:58:03,195 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-10-28 22:58:03,195 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure sll_circular_update_at [2021-10-28 22:58:03,196 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure node_create [2021-10-28 22:58:03,203 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 24 nodes and edges [2021-10-28 22:58:03,206 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2021-10-28 22:58:03,207 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-28 22:58:03,207 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 22:58:03,297 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/witness.graphml [2021-10-28 22:58:03,298 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 22:58:03,300 INFO L168 Benchmark]: Toolchain (without parser) took 518960.92 ms. Allocated memory was 96.5 MB in the beginning and 281.0 MB in the end (delta: 184.5 MB). Free memory was 53.6 MB in the beginning and 62.8 MB in the end (delta: -9.3 MB). Peak memory consumption was 174.4 MB. Max. memory is 16.1 GB. [2021-10-28 22:58:03,300 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 96.5 MB. Free memory is still 71.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 22:58:03,301 INFO L168 Benchmark]: CACSL2BoogieTranslator took 669.05 ms. Allocated memory is still 96.5 MB. Free memory was 53.4 MB in the beginning and 64.7 MB in the end (delta: -11.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-28 22:58:03,301 INFO L168 Benchmark]: Boogie Preprocessor took 119.13 ms. Allocated memory is still 96.5 MB. Free memory was 64.7 MB in the beginning and 61.9 MB in the end (delta: 2.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-28 22:58:03,302 INFO L168 Benchmark]: RCFGBuilder took 750.41 ms. Allocated memory is still 96.5 MB. Free memory was 61.9 MB in the beginning and 37.8 MB in the end (delta: 24.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2021-10-28 22:58:03,303 INFO L168 Benchmark]: TraceAbstraction took 517291.95 ms. Allocated memory was 96.5 MB in the beginning and 281.0 MB in the end (delta: 184.5 MB). Free memory was 37.3 MB in the beginning and 67.9 MB in the end (delta: -30.7 MB). Peak memory consumption was 155.5 MB. Max. memory is 16.1 GB. [2021-10-28 22:58:03,304 INFO L168 Benchmark]: Witness Printer took 118.90 ms. Allocated memory is still 281.0 MB. Free memory was 66.9 MB in the beginning and 62.8 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-28 22:58:03,306 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 96.5 MB. Free memory is still 71.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 669.05 ms. Allocated memory is still 96.5 MB. Free memory was 53.4 MB in the beginning and 64.7 MB in the end (delta: -11.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 119.13 ms. Allocated memory is still 96.5 MB. Free memory was 64.7 MB in the beginning and 61.9 MB in the end (delta: 2.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 750.41 ms. Allocated memory is still 96.5 MB. Free memory was 61.9 MB in the beginning and 37.8 MB in the end (delta: 24.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 517291.95 ms. Allocated memory was 96.5 MB in the beginning and 281.0 MB in the end (delta: 184.5 MB). Free memory was 37.3 MB in the beginning and 67.9 MB in the end (delta: -30.7 MB). Peak memory consumption was 155.5 MB. Max. memory is 16.1 GB. * Witness Printer took 118.90 ms. Allocated memory is still 281.0 MB. Free memory was 66.9 MB in the beginning and 62.8 MB in the end (delta: 4.0 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: 579]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 579]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 580]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 580]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 637]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 620]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 615]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 615]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 618]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 618]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 597]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 597]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 599]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 599]: pointer dereference always succeeds For all program executions holds that pointer dereference 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: 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: 588]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 588]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 592]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 592]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 608]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 608]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 611]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 611]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 12 procedures, 114 locations, 28 error locations. Started 1 CEGAR loops. OverallTime: 517.2s, OverallIterations: 37, TraceHistogramMax: 3, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 307.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 2310 SDtfs, 7154 SDslu, 12512 SDs, 0 SdLazy, 44975 SolverSat, 1622 SolverUnsat, 147 SolverUnknown, 0 SolverNotchecked, 176.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2934 GetRequests, 1638 SyntacticMatches, 47 SemanticMatches, 1249 ConstructedPredicates, 10 IntricatePredicates, 0 DeprecatedPredicates, 12882 ImplicationChecksByTransitivity, 288.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=160occurred in iteration=15, InterpolantAutomatonStates: 649, 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, 37 MinimizatonAttempts, 770 StatesRemovedByMinimization, 33 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.7s SatisfiabilityAnalysisTime, 189.5s InterpolantComputationTime, 3876 NumberOfCodeBlocks, 3849 NumberOfCodeBlocksAsserted, 64 NumberOfCheckSat, 3816 ConstructedInterpolants, 338 QuantifiedInterpolants, 37461 SizeOfPredicates, 292 NumberOfNonLiveVariables, 8352 ConjunctsInSsa, 1142 ConjunctsInUnsatCore, 60 InterpolantComputations, 18 PerfectInterpolantSequences, 975/1376 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 28 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-28 22:58:03,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb253db0-85d8-4da4-a90a-b82bb93afb86/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...