./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2c_update_all_reverse.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2c_update_all_reverse.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be --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 4fecbd384f63aa34e01807a3a6735a322a2435f1312f0df3ed763fde7f43fe0a ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 19:39:02,711 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 19:39:02,714 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 19:39:02,773 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 19:39:02,774 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 19:39:02,776 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 19:39:02,778 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 19:39:02,781 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 19:39:02,783 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 19:39:02,785 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 19:39:02,786 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 19:39:02,788 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 19:39:02,788 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 19:39:02,790 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 19:39:02,792 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 19:39:02,794 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 19:39:02,795 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 19:39:02,797 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 19:39:02,799 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 19:39:02,802 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 19:39:02,805 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 19:39:02,807 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 19:39:02,809 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 19:39:02,810 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 19:39:02,815 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 19:39:02,815 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 19:39:02,816 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 19:39:02,817 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 19:39:02,818 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 19:39:02,819 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 19:39:02,820 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 19:39:02,821 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 19:39:02,822 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 19:39:02,823 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 19:39:02,825 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 19:39:02,826 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 19:39:02,827 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 19:39:02,827 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 19:39:02,828 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 19:39:02,829 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 19:39:02,830 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 19:39:02,831 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-21 19:39:02,875 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 19:39:02,875 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 19:39:02,876 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 19:39:02,876 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 19:39:02,877 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 19:39:02,878 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 19:39:02,884 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 19:39:02,885 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 19:39:02,885 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 19:39:02,885 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-21 19:39:02,887 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 19:39:02,887 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 19:39:02,887 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 19:39:02,887 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-21 19:39:02,888 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-21 19:39:02,888 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-21 19:39:02,888 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 19:39:02,889 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-21 19:39:02,889 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 19:39:02,889 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 19:39:02,890 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 19:39:02,890 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 19:39:02,890 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 19:39:02,890 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:39:02,891 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 19:39:02,891 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 19:39:02,891 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 19:39:02,892 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 19:39:02,892 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 19:39:02,894 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_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4fecbd384f63aa34e01807a3a6735a322a2435f1312f0df3ed763fde7f43fe0a [2021-10-21 19:39:03,233 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 19:39:03,259 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 19:39:03,268 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 19:39:03,269 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 19:39:03,271 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 19:39:03,272 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/list-simple/sll2c_update_all_reverse.i [2021-10-21 19:39:03,382 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/data/601a99310/1170d948f8d1406b9d21cb597db39cd4/FLAG6500dc4c5 [2021-10-21 19:39:04,022 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 19:39:04,022 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/sv-benchmarks/c/list-simple/sll2c_update_all_reverse.i [2021-10-21 19:39:04,038 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/data/601a99310/1170d948f8d1406b9d21cb597db39cd4/FLAG6500dc4c5 [2021-10-21 19:39:04,306 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/data/601a99310/1170d948f8d1406b9d21cb597db39cd4 [2021-10-21 19:39:04,310 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 19:39:04,312 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-21 19:39:04,330 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 19:39:04,330 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 19:39:04,333 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 19:39:04,334 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:39:04" (1/1) ... [2021-10-21 19:39:04,335 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18dd127c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:39:04, skipping insertion in model container [2021-10-21 19:39:04,335 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:39:04" (1/1) ... [2021-10-21 19:39:04,344 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 19:39:04,414 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:39:04,906 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_fab3a3d6-41f9-4056-9784-2222b1da2fcf/sv-benchmarks/c/list-simple/sll2c_update_all_reverse.i[24436,24449] [2021-10-21 19:39:04,915 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:39:04,935 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 19:39:05,025 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_fab3a3d6-41f9-4056-9784-2222b1da2fcf/sv-benchmarks/c/list-simple/sll2c_update_all_reverse.i[24436,24449] [2021-10-21 19:39:05,026 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:39:05,069 INFO L208 MainTranslator]: Completed translation [2021-10-21 19:39:05,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:39:05 WrapperNode [2021-10-21 19:39:05,069 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 19:39:05,073 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 19:39:05,073 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 19:39:05,073 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 19:39:05,088 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:39:05" (1/1) ... [2021-10-21 19:39:05,089 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:39:05" (1/1) ... [2021-10-21 19:39:05,131 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:39:05" (1/1) ... [2021-10-21 19:39:05,132 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:39:05" (1/1) ... [2021-10-21 19:39:05,165 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:39:05" (1/1) ... [2021-10-21 19:39:05,171 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:39:05" (1/1) ... [2021-10-21 19:39:05,192 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:39:05" (1/1) ... [2021-10-21 19:39:05,199 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 19:39:05,200 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 19:39:05,201 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 19:39:05,201 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 19:39:05,218 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:39:05" (1/1) ... [2021-10-21 19:39:05,229 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:39:05,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:39:05,261 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 19:39:05,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 19:39:05,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-21 19:39:05,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 19:39:05,323 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-21 19:39:05,324 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-21 19:39:05,324 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-21 19:39:05,325 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-10-21 19:39:05,325 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-10-21 19:39:05,325 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_circular_create [2021-10-21 19:39:05,326 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_circular_destroy [2021-10-21 19:39:05,327 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_circular_get_data_at [2021-10-21 19:39:05,327 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_circular_update_at [2021-10-21 19:39:05,327 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-21 19:39:05,327 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-21 19:39:05,328 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-21 19:39:05,328 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-21 19:39:05,328 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-21 19:39:05,328 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-21 19:39:05,329 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 19:39:05,329 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-21 19:39:05,329 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-21 19:39:05,329 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-21 19:39:05,329 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-21 19:39:05,330 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-21 19:39:05,330 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-21 19:39:05,330 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-21 19:39:05,330 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-21 19:39:05,330 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-21 19:39:05,331 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-21 19:39:05,331 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-21 19:39:05,331 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-21 19:39:05,331 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-21 19:39:05,332 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-21 19:39:05,332 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-21 19:39:05,332 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-21 19:39:05,332 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-21 19:39:05,332 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-21 19:39:05,333 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-21 19:39:05,333 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-21 19:39:05,333 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-21 19:39:05,333 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-21 19:39:05,334 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-21 19:39:05,334 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-21 19:39:05,334 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-21 19:39:05,334 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-21 19:39:05,334 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-21 19:39:05,335 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-21 19:39:05,335 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-21 19:39:05,336 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-21 19:39:05,336 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-21 19:39:05,337 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-21 19:39:05,337 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-21 19:39:05,341 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-21 19:39:05,341 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-21 19:39:05,342 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-21 19:39:05,342 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-21 19:39:05,342 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-21 19:39:05,343 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-21 19:39:05,343 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-21 19:39:05,343 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-21 19:39:05,343 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-21 19:39:05,343 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-21 19:39:05,344 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-21 19:39:05,344 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-21 19:39:05,344 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-21 19:39:05,345 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-21 19:39:05,345 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-21 19:39:05,346 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-21 19:39:05,347 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-21 19:39:05,347 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-21 19:39:05,348 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-21 19:39:05,348 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-21 19:39:05,348 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-21 19:39:05,348 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-21 19:39:05,349 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-21 19:39:05,349 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-10-21 19:39:05,349 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-21 19:39:05,349 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-21 19:39:05,349 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-21 19:39:05,350 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-21 19:39:05,350 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-21 19:39:05,351 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-21 19:39:05,351 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-21 19:39:05,351 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-21 19:39:05,351 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-21 19:39:05,352 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-21 19:39:05,352 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-21 19:39:05,352 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-21 19:39:05,352 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-21 19:39:05,352 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-21 19:39:05,353 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-21 19:39:05,353 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-21 19:39:05,353 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-21 19:39:05,353 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-21 19:39:05,353 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-21 19:39:05,354 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-21 19:39:05,354 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-21 19:39:05,354 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-21 19:39:05,354 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-21 19:39:05,354 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-21 19:39:05,355 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-21 19:39:05,355 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-21 19:39:05,355 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-21 19:39:05,355 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-21 19:39:05,355 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-21 19:39:05,356 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-21 19:39:05,356 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-21 19:39:05,356 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-21 19:39:05,357 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-21 19:39:05,357 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-21 19:39:05,358 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-21 19:39:05,358 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-21 19:39:05,359 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-21 19:39:05,359 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-21 19:39:05,359 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-21 19:39:05,359 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-21 19:39:05,359 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-21 19:39:05,360 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-21 19:39:05,360 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-21 19:39:05,360 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-21 19:39:05,360 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-21 19:39:05,360 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-21 19:39:05,361 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-21 19:39:05,361 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-10-21 19:39:05,361 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-10-21 19:39:05,362 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-21 19:39:05,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-21 19:39:05,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-21 19:39:05,364 INFO L130 BoogieDeclarations]: Found specification of procedure sll_circular_create [2021-10-21 19:39:05,367 INFO L130 BoogieDeclarations]: Found specification of procedure sll_circular_destroy [2021-10-21 19:39:05,367 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-21 19:39:05,368 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-21 19:39:05,369 INFO L130 BoogieDeclarations]: Found specification of procedure sll_circular_get_data_at [2021-10-21 19:39:05,370 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-21 19:39:05,371 INFO L130 BoogieDeclarations]: Found specification of procedure sll_circular_update_at [2021-10-21 19:39:05,371 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-21 19:39:05,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-21 19:39:05,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-21 19:39:05,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 19:39:05,777 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-10-21 19:39:06,095 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 19:39:06,095 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-10-21 19:39:06,101 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:39:06 BoogieIcfgContainer [2021-10-21 19:39:06,101 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 19:39:06,106 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 19:39:06,106 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 19:39:06,117 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 19:39:06,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 07:39:04" (1/3) ... [2021-10-21 19:39:06,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@259775d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:39:06, skipping insertion in model container [2021-10-21 19:39:06,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:39:05" (2/3) ... [2021-10-21 19:39:06,119 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@259775d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:39:06, skipping insertion in model container [2021-10-21 19:39:06,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:39:06" (3/3) ... [2021-10-21 19:39:06,122 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2c_update_all_reverse.i [2021-10-21 19:39:06,128 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 19:39:06,129 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2021-10-21 19:39:06,186 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 19:39:06,192 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 [2021-10-21 19:39:06,193 INFO L340 AbstractCegarLoop]: Starting to check reachability of 28 error locations. [2021-10-21 19:39:06,214 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) [2021-10-21 19:39:06,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-21 19:39:06,223 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:39:06,224 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:39:06,224 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-21 19:39:06,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:39:06,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1445934727, now seen corresponding path program 1 times [2021-10-21 19:39:06,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:39:06,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238779210] [2021-10-21 19:39:06,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:06,244 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:39:06,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:06,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:39:06,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:06,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:39:06,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:39:06,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238779210] [2021-10-21 19:39:06,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238779210] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:39:06,523 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:39:06,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:39:06,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687969373] [2021-10-21 19:39:06,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:39:06,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:39:06,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:39:06,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:39:06,585 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) [2021-10-21 19:39:07,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:39:07,041 INFO L93 Difference]: Finished difference Result 121 states and 130 transitions. [2021-10-21 19:39:07,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:39:07,043 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 [2021-10-21 19:39:07,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:39:07,061 INFO L225 Difference]: With dead ends: 121 [2021-10-21 19:39:07,062 INFO L226 Difference]: Without dead ends: 115 [2021-10-21 19:39:07,064 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:39:07,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-10-21 19:39:07,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 96. [2021-10-21 19:39:07,117 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) [2021-10-21 19:39:07,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 103 transitions. [2021-10-21 19:39:07,122 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 103 transitions. Word has length 12 [2021-10-21 19:39:07,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:39:07,123 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 103 transitions. [2021-10-21 19:39:07,123 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) [2021-10-21 19:39:07,123 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 103 transitions. [2021-10-21 19:39:07,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-21 19:39:07,124 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:39:07,124 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:39:07,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 19:39:07,125 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-21 19:39:07,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:39:07,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1445934728, now seen corresponding path program 1 times [2021-10-21 19:39:07,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:39:07,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033215816] [2021-10-21 19:39:07,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:07,127 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:39:07,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:07,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:39:07,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:07,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:39:07,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:39:07,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033215816] [2021-10-21 19:39:07,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033215816] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:39:07,318 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:39:07,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:39:07,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780807935] [2021-10-21 19:39:07,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:39:07,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:39:07,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:39:07,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:39:07,331 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) [2021-10-21 19:39:07,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:39:07,622 INFO L93 Difference]: Finished difference Result 113 states and 121 transitions. [2021-10-21 19:39:07,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:39:07,624 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 [2021-10-21 19:39:07,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:39:07,629 INFO L225 Difference]: With dead ends: 113 [2021-10-21 19:39:07,629 INFO L226 Difference]: Without dead ends: 113 [2021-10-21 19:39:07,630 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:39:07,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-10-21 19:39:07,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 94. [2021-10-21 19:39:07,648 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) [2021-10-21 19:39:07,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 101 transitions. [2021-10-21 19:39:07,656 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 101 transitions. Word has length 12 [2021-10-21 19:39:07,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:39:07,657 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 101 transitions. [2021-10-21 19:39:07,657 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) [2021-10-21 19:39:07,657 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 101 transitions. [2021-10-21 19:39:07,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-21 19:39:07,658 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:39:07,658 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:39:07,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-21 19:39:07,659 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)] === [2021-10-21 19:39:07,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:39:07,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1652501893, now seen corresponding path program 1 times [2021-10-21 19:39:07,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:39:07,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423052065] [2021-10-21 19:39:07,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:07,661 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:39:07,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:07,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:39:07,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:07,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-21 19:39:07,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:07,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:39:07,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:39:07,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423052065] [2021-10-21 19:39:07,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423052065] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:39:07,814 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:39:07,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-21 19:39:07,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806243112] [2021-10-21 19:39:07,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:39:07,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:39:07,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:39:07,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:39:07,817 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) [2021-10-21 19:39:08,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:39:08,341 INFO L93 Difference]: Finished difference Result 120 states and 129 transitions. [2021-10-21 19:39:08,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 19:39:08,343 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 [2021-10-21 19:39:08,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:39:08,345 INFO L225 Difference]: With dead ends: 120 [2021-10-21 19:39:08,345 INFO L226 Difference]: Without dead ends: 120 [2021-10-21 19:39:08,345 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 181.6ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:39:08,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-10-21 19:39:08,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 95. [2021-10-21 19:39:08,355 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) [2021-10-21 19:39:08,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 102 transitions. [2021-10-21 19:39:08,357 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 102 transitions. Word has length 19 [2021-10-21 19:39:08,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:39:08,357 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 102 transitions. [2021-10-21 19:39:08,358 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) [2021-10-21 19:39:08,358 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 102 transitions. [2021-10-21 19:39:08,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-21 19:39:08,359 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:39:08,359 INFO L512 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] [2021-10-21 19:39:08,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-21 19:39:08,360 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)] === [2021-10-21 19:39:08,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:39:08,361 INFO L82 PathProgramCache]: Analyzing trace with hash 173693975, now seen corresponding path program 1 times [2021-10-21 19:39:08,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:39:08,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469382009] [2021-10-21 19:39:08,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:08,362 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:39:08,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:08,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:39:08,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:08,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-21 19:39:08,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:08,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-21 19:39:08,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:08,564 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-21 19:39:08,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:39:08,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469382009] [2021-10-21 19:39:08,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469382009] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:39:08,566 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:39:08,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-21 19:39:08,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566592392] [2021-10-21 19:39:08,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:39:08,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:39:08,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:39:08,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:39:08,569 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) [2021-10-21 19:39:09,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:39:09,045 INFO L93 Difference]: Finished difference Result 114 states and 123 transitions. [2021-10-21 19:39:09,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 19:39:09,046 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 [2021-10-21 19:39:09,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:39:09,047 INFO L225 Difference]: With dead ends: 114 [2021-10-21 19:39:09,047 INFO L226 Difference]: Without dead ends: 114 [2021-10-21 19:39:09,048 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 104.0ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:39:09,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-10-21 19:39:09,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 94. [2021-10-21 19:39:09,060 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) [2021-10-21 19:39:09,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 101 transitions. [2021-10-21 19:39:09,061 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 101 transitions. Word has length 28 [2021-10-21 19:39:09,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:39:09,062 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 101 transitions. [2021-10-21 19:39:09,062 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) [2021-10-21 19:39:09,063 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 101 transitions. [2021-10-21 19:39:09,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-21 19:39:09,064 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:39:09,065 INFO L512 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] [2021-10-21 19:39:09,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-21 19:39:09,065 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)] === [2021-10-21 19:39:09,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:39:09,066 INFO L82 PathProgramCache]: Analyzing trace with hash 173693976, now seen corresponding path program 1 times [2021-10-21 19:39:09,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:39:09,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333578392] [2021-10-21 19:39:09,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:09,066 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:39:09,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:09,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:39:09,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:09,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-21 19:39:09,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:09,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-21 19:39:09,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:09,272 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:39:09,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:39:09,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333578392] [2021-10-21 19:39:09,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333578392] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:39:09,273 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:39:09,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-21 19:39:09,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471539159] [2021-10-21 19:39:09,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:39:09,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:39:09,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:39:09,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:39:09,275 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) [2021-10-21 19:39:09,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:39:09,727 INFO L93 Difference]: Finished difference Result 113 states and 122 transitions. [2021-10-21 19:39:09,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 19:39:09,728 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 [2021-10-21 19:39:09,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:39:09,730 INFO L225 Difference]: With dead ends: 113 [2021-10-21 19:39:09,730 INFO L226 Difference]: Without dead ends: 113 [2021-10-21 19:39:09,730 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 131.8ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:39:09,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-10-21 19:39:09,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 93. [2021-10-21 19:39:09,736 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) [2021-10-21 19:39:09,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 100 transitions. [2021-10-21 19:39:09,737 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 100 transitions. Word has length 28 [2021-10-21 19:39:09,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:39:09,737 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 100 transitions. [2021-10-21 19:39:09,738 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) [2021-10-21 19:39:09,738 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 100 transitions. [2021-10-21 19:39:09,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-21 19:39:09,739 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:39:09,739 INFO L512 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] [2021-10-21 19:39:09,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-21 19:39:09,739 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)] === [2021-10-21 19:39:09,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:39:09,740 INFO L82 PathProgramCache]: Analyzing trace with hash -918257581, now seen corresponding path program 1 times [2021-10-21 19:39:09,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:39:09,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301711158] [2021-10-21 19:39:09,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:09,741 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:39:09,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:09,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:39:09,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:09,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-21 19:39:09,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:09,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-21 19:39:09,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:09,945 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-21 19:39:09,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:39:09,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301711158] [2021-10-21 19:39:09,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301711158] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:39:09,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290089527] [2021-10-21 19:39:09,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:09,947 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:39:09,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:39:09,957 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:39:09,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-21 19:39:10,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:10,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-21 19:39:10,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:39:10,244 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 [2021-10-21 19:39:10,609 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-21 19:39:10,609 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 [2021-10-21 19:39:10,796 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:39:10,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290089527] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:39:10,796 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:39:10,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-10-21 19:39:10,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874012181] [2021-10-21 19:39:10,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-21 19:39:10,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:39:10,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-21 19:39:10,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:39:10,800 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) [2021-10-21 19:39:11,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:39:11,548 INFO L93 Difference]: Finished difference Result 112 states and 121 transitions. [2021-10-21 19:39:11,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 19:39:11,551 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 [2021-10-21 19:39:11,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:39:11,552 INFO L225 Difference]: With dead ends: 112 [2021-10-21 19:39:11,553 INFO L226 Difference]: Without dead ends: 112 [2021-10-21 19:39:11,553 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 257.0ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-10-21 19:39:11,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-10-21 19:39:11,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 92. [2021-10-21 19:39:11,559 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) [2021-10-21 19:39:11,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 99 transitions. [2021-10-21 19:39:11,560 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 99 transitions. Word has length 31 [2021-10-21 19:39:11,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:39:11,561 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 99 transitions. [2021-10-21 19:39:11,561 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) [2021-10-21 19:39:11,561 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 99 transitions. [2021-10-21 19:39:11,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-21 19:39:11,562 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:39:11,563 INFO L512 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] [2021-10-21 19:39:11,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-21 19:39:11,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:39:11,786 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)] === [2021-10-21 19:39:11,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:39:11,787 INFO L82 PathProgramCache]: Analyzing trace with hash -918257580, now seen corresponding path program 1 times [2021-10-21 19:39:11,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:39:11,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451919368] [2021-10-21 19:39:11,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:11,787 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:39:11,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:11,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:39:11,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:11,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-21 19:39:11,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:12,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-21 19:39:12,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:12,088 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-21 19:39:12,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:39:12,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451919368] [2021-10-21 19:39:12,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451919368] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:39:12,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508275034] [2021-10-21 19:39:12,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:12,090 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:39:12,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:39:12,091 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:39:12,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-21 19:39:12,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:12,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-21 19:39:12,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:39:12,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-21 19:39:12,340 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 [2021-10-21 19:39:12,805 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-21 19:39:12,806 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 [2021-10-21 19:39:12,815 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-21 19:39:12,816 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 [2021-10-21 19:39:12,977 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:39:12,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508275034] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:39:12,978 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:39:12,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-10-21 19:39:12,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863353688] [2021-10-21 19:39:12,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-21 19:39:12,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:39:12,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-21 19:39:12,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-10-21 19:39:12,982 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) [2021-10-21 19:39:13,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:39:13,822 INFO L93 Difference]: Finished difference Result 111 states and 120 transitions. [2021-10-21 19:39:13,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 19:39:13,823 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 [2021-10-21 19:39:13,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:39:13,824 INFO L225 Difference]: With dead ends: 111 [2021-10-21 19:39:13,825 INFO L226 Difference]: Without dead ends: 111 [2021-10-21 19:39:13,825 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 419.4ms TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-10-21 19:39:13,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-10-21 19:39:13,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 91. [2021-10-21 19:39:13,831 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) [2021-10-21 19:39:13,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 98 transitions. [2021-10-21 19:39:13,832 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 98 transitions. Word has length 31 [2021-10-21 19:39:13,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:39:13,832 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 98 transitions. [2021-10-21 19:39:13,833 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) [2021-10-21 19:39:13,833 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 98 transitions. [2021-10-21 19:39:13,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-21 19:39:13,835 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:39:13,835 INFO L512 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] [2021-10-21 19:39:13,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-21 19:39:14,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:39:14,050 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)] === [2021-10-21 19:39:14,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:39:14,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1835388011, now seen corresponding path program 1 times [2021-10-21 19:39:14,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:39:14,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129368880] [2021-10-21 19:39:14,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:14,051 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:39:14,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:14,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:39:14,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:14,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:39:14,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:14,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:39:14,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:14,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-21 19:39:14,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:14,284 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-21 19:39:14,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:39:14,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129368880] [2021-10-21 19:39:14,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129368880] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:39:14,285 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:39:14,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-10-21 19:39:14,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898795274] [2021-10-21 19:39:14,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-21 19:39:14,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:39:14,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-21 19:39:14,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-10-21 19:39:14,289 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) [2021-10-21 19:39:15,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:39:15,076 INFO L93 Difference]: Finished difference Result 119 states and 128 transitions. [2021-10-21 19:39:15,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-21 19:39:15,077 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 [2021-10-21 19:39:15,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:39:15,078 INFO L225 Difference]: With dead ends: 119 [2021-10-21 19:39:15,079 INFO L226 Difference]: Without dead ends: 119 [2021-10-21 19:39:15,079 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 262.8ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-10-21 19:39:15,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-10-21 19:39:15,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 94. [2021-10-21 19:39:15,088 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) [2021-10-21 19:39:15,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 104 transitions. [2021-10-21 19:39:15,089 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 104 transitions. Word has length 40 [2021-10-21 19:39:15,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:39:15,089 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 104 transitions. [2021-10-21 19:39:15,090 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) [2021-10-21 19:39:15,090 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 104 transitions. [2021-10-21 19:39:15,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-21 19:39:15,091 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:39:15,092 INFO L512 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] [2021-10-21 19:39:15,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-21 19:39:15,092 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)] === [2021-10-21 19:39:15,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:39:15,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1835388012, now seen corresponding path program 1 times [2021-10-21 19:39:15,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:39:15,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770845556] [2021-10-21 19:39:15,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:15,094 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:39:15,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:15,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:39:15,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:15,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:39:15,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:15,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:39:15,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:15,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-21 19:39:15,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:15,345 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-21 19:39:15,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:39:15,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770845556] [2021-10-21 19:39:15,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770845556] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:39:15,346 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:39:15,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-21 19:39:15,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203604715] [2021-10-21 19:39:15,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 19:39:15,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:39:15,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 19:39:15,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:39:15,349 INFO L87 Difference]: Start difference. First operand 94 states and 104 transitions. Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 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) [2021-10-21 19:39:15,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:39:15,913 INFO L93 Difference]: Finished difference Result 136 states and 150 transitions. [2021-10-21 19:39:15,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 19:39:15,913 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 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 40 [2021-10-21 19:39:15,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:39:15,915 INFO L225 Difference]: With dead ends: 136 [2021-10-21 19:39:15,915 INFO L226 Difference]: Without dead ends: 136 [2021-10-21 19:39:15,916 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 235.6ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:39:15,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-10-21 19:39:15,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 106. [2021-10-21 19:39:15,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 70 states have (on average 1.5) internal successors, (105), 90 states have internal predecessors, (105), 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) [2021-10-21 19:39:15,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 122 transitions. [2021-10-21 19:39:15,921 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 122 transitions. Word has length 40 [2021-10-21 19:39:15,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:39:15,921 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 122 transitions. [2021-10-21 19:39:15,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 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) [2021-10-21 19:39:15,922 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 122 transitions. [2021-10-21 19:39:15,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-21 19:39:15,923 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:39:15,923 INFO L512 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] [2021-10-21 19:39:15,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-21 19:39:15,924 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting sll_circular_update_atErr1REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-21 19:39:15,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:39:15,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1835388067, now seen corresponding path program 1 times [2021-10-21 19:39:15,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:39:15,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913655219] [2021-10-21 19:39:15,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:15,925 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:39:15,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:16,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:39:16,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:16,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:39:16,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:16,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:39:16,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:16,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-21 19:39:16,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:16,344 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:39:16,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:39:16,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913655219] [2021-10-21 19:39:16,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913655219] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:39:16,345 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:39:16,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-10-21 19:39:16,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850879065] [2021-10-21 19:39:16,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-21 19:39:16,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:39:16,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-21 19:39:16,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-10-21 19:39:16,350 INFO L87 Difference]: Start difference. First operand 106 states and 122 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) [2021-10-21 19:39:17,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:39:17,285 INFO L93 Difference]: Finished difference Result 130 states and 145 transitions. [2021-10-21 19:39:17,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-21 19:39:17,285 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 [2021-10-21 19:39:17,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:39:17,287 INFO L225 Difference]: With dead ends: 130 [2021-10-21 19:39:17,287 INFO L226 Difference]: Without dead ends: 130 [2021-10-21 19:39:17,288 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 384.8ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-10-21 19:39:17,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-10-21 19:39:17,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 106. [2021-10-21 19:39:17,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 70 states have (on average 1.457142857142857) internal successors, (102), 90 states have internal predecessors, (102), 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) [2021-10-21 19:39:17,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 119 transitions. [2021-10-21 19:39:17,294 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 119 transitions. Word has length 40 [2021-10-21 19:39:17,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:39:17,295 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 119 transitions. [2021-10-21 19:39:17,295 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) [2021-10-21 19:39:17,295 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 119 transitions. [2021-10-21 19:39:17,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-21 19:39:17,296 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:39:17,297 INFO L512 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] [2021-10-21 19:39:17,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-21 19:39:17,297 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)] === [2021-10-21 19:39:17,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:39:17,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1182712765, now seen corresponding path program 1 times [2021-10-21 19:39:17,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:39:17,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83717348] [2021-10-21 19:39:17,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:17,298 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:39:17,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:17,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:39:17,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:17,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:39:17,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:17,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:39:17,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:17,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-21 19:39:17,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:17,734 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:39:17,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:39:17,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83717348] [2021-10-21 19:39:17,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83717348] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:39:17,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050565406] [2021-10-21 19:39:17,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:17,735 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:39:17,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:39:17,738 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:39:17,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-21 19:39:17,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:17,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 62 conjunts are in the unsatisfiable core [2021-10-21 19:39:17,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:39:17,988 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 [2021-10-21 19:39:18,226 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-21 19:39:18,227 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 [2021-10-21 19:39:18,336 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 [2021-10-21 19:39:18,471 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-21 19:39:18,472 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 [2021-10-21 19:39:19,020 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-21 19:39:19,020 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 36 treesize of output 19 [2021-10-21 19:39:19,031 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:39:19,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050565406] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:39:19,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:39:19,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 34 [2021-10-21 19:39:19,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789226332] [2021-10-21 19:39:19,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-21 19:39:19,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:39:19,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-21 19:39:19,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1109, Unknown=0, NotChecked=0, Total=1190 [2021-10-21 19:39:19,035 INFO L87 Difference]: Start difference. First operand 106 states and 119 transitions. Second operand has 35 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 25 states have internal predecessors, (56), 4 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (6), 6 states have call predecessors, (6), 2 states have call successors, (6) [2021-10-21 19:39:20,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:39:20,922 INFO L93 Difference]: Finished difference Result 155 states and 175 transitions. [2021-10-21 19:39:20,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-21 19:39:20,922 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 25 states have internal predecessors, (56), 4 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (6), 6 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2021-10-21 19:39:20,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:39:20,924 INFO L225 Difference]: With dead ends: 155 [2021-10-21 19:39:20,924 INFO L226 Difference]: Without dead ends: 155 [2021-10-21 19:39:20,926 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 1370.8ms TimeCoverageRelationStatistics Valid=198, Invalid=2154, Unknown=0, NotChecked=0, Total=2352 [2021-10-21 19:39:20,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-10-21 19:39:20,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 125. [2021-10-21 19:39:20,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 86 states have (on average 1.4186046511627908) internal successors, (122), 106 states have internal predecessors, (122), 11 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2021-10-21 19:39:20,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 144 transitions. [2021-10-21 19:39:20,934 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 144 transitions. Word has length 43 [2021-10-21 19:39:20,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:39:20,934 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 144 transitions. [2021-10-21 19:39:20,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 25 states have internal predecessors, (56), 4 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (6), 6 states have call predecessors, (6), 2 states have call successors, (6) [2021-10-21 19:39:20,935 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 144 transitions. [2021-10-21 19:39:20,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-21 19:39:20,936 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:39:20,936 INFO L512 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] [2021-10-21 19:39:20,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-21 19:39:21,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:39:21,150 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting sll_circular_update_atErr3REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-21 19:39:21,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:39:21,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1182712764, now seen corresponding path program 1 times [2021-10-21 19:39:21,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:39:21,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215845763] [2021-10-21 19:39:21,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:21,151 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:39:21,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:21,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:39:21,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:21,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:39:21,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:21,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:39:21,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:21,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-21 19:39:21,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:21,964 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:39:21,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:39:21,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215845763] [2021-10-21 19:39:21,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215845763] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:39:21,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589849964] [2021-10-21 19:39:21,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:21,965 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:39:21,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:39:21,966 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:39:21,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-21 19:39:22,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:22,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 73 conjunts are in the unsatisfiable core [2021-10-21 19:39:22,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:39:22,243 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 [2021-10-21 19:39:22,250 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 [2021-10-21 19:39:22,829 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-21 19:39:22,830 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 [2021-10-21 19:39:22,845 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 [2021-10-21 19:39:23,058 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 18 treesize of output 14 [2021-10-21 19:39:23,076 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 [2021-10-21 19:39:23,357 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-21 19:39:23,358 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 73 treesize of output 55 [2021-10-21 19:39:23,377 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-21 19:39:23,377 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 65 treesize of output 56 [2021-10-21 19:39:24,554 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-10-21 19:39:24,555 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 90 treesize of output 68 [2021-10-21 19:39:24,568 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-10-21 19:39:24,568 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 56 treesize of output 39 [2021-10-21 19:39:24,810 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:39:24,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589849964] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:39:24,811 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:39:24,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 41 [2021-10-21 19:39:24,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66757101] [2021-10-21 19:39:24,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-10-21 19:39:24,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:39:24,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-10-21 19:39:24,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1631, Unknown=0, NotChecked=0, Total=1722 [2021-10-21 19:39:24,815 INFO L87 Difference]: Start difference. First operand 125 states and 144 transitions. Second operand has 42 states, 41 states have (on average 1.5609756097560976) internal successors, (64), 31 states have internal predecessors, (64), 5 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) [2021-10-21 19:39:29,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:39:29,505 INFO L93 Difference]: Finished difference Result 191 states and 223 transitions. [2021-10-21 19:39:29,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-21 19:39:29,508 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 1.5609756097560976) internal successors, (64), 31 states have internal predecessors, (64), 5 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) Word has length 43 [2021-10-21 19:39:29,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:39:29,520 INFO L225 Difference]: With dead ends: 191 [2021-10-21 19:39:29,521 INFO L226 Difference]: Without dead ends: 191 [2021-10-21 19:39:29,523 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 3772.8ms TimeCoverageRelationStatistics Valid=242, Invalid=3418, Unknown=0, NotChecked=0, Total=3660 [2021-10-21 19:39:29,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-10-21 19:39:29,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 141. [2021-10-21 19:39:29,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 98 states have (on average 1.3979591836734695) internal successors, (137), 120 states have internal predecessors, (137), 12 states have call successors, (12), 10 states have call predecessors, (12), 11 states have return successors, (15), 10 states have call predecessors, (15), 11 states have call successors, (15) [2021-10-21 19:39:29,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 164 transitions. [2021-10-21 19:39:29,532 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 164 transitions. Word has length 43 [2021-10-21 19:39:29,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:39:29,532 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 164 transitions. [2021-10-21 19:39:29,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 1.5609756097560976) internal successors, (64), 31 states have internal predecessors, (64), 5 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) [2021-10-21 19:39:29,533 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 164 transitions. [2021-10-21 19:39:29,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-21 19:39:29,534 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:39:29,535 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:39:29,565 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-10-21 19:39:29,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-21 19:39:29,750 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting sll_circular_update_atErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-21 19:39:29,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:39:29,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1717411179, now seen corresponding path program 2 times [2021-10-21 19:39:29,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:39:29,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282843313] [2021-10-21 19:39:29,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:29,751 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:39:29,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:29,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:39:29,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:29,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:39:29,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:29,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:39:29,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:29,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-21 19:39:29,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:29,921 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-21 19:39:29,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:39:29,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282843313] [2021-10-21 19:39:29,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282843313] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:39:29,921 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:39:29,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-21 19:39:29,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625325324] [2021-10-21 19:39:29,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 19:39:29,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:39:29,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 19:39:29,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:39:29,923 INFO L87 Difference]: Start difference. First operand 141 states and 164 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 7 states have internal predecessors, (30), 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) [2021-10-21 19:39:30,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:39:30,520 INFO L93 Difference]: Finished difference Result 155 states and 170 transitions. [2021-10-21 19:39:30,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 19:39:30,521 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 7 states have internal predecessors, (30), 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 46 [2021-10-21 19:39:30,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:39:30,523 INFO L225 Difference]: With dead ends: 155 [2021-10-21 19:39:30,523 INFO L226 Difference]: Without dead ends: 155 [2021-10-21 19:39:30,524 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 279.3ms TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-10-21 19:39:30,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-10-21 19:39:30,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 136. [2021-10-21 19:39:30,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 95 states have (on average 1.3157894736842106) internal successors, (125), 115 states have internal predecessors, (125), 12 states have call successors, (12), 10 states have call predecessors, (12), 11 states have return successors, (13), 10 states have call predecessors, (13), 11 states have call successors, (13) [2021-10-21 19:39:30,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 150 transitions. [2021-10-21 19:39:30,532 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 150 transitions. Word has length 46 [2021-10-21 19:39:30,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:39:30,533 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 150 transitions. [2021-10-21 19:39:30,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 7 states have internal predecessors, (30), 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) [2021-10-21 19:39:30,533 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 150 transitions. [2021-10-21 19:39:30,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-10-21 19:39:30,540 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:39:30,540 INFO L512 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, 1, 1, 1] [2021-10-21 19:39:30,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-21 19:39:30,541 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting sll_circular_get_data_atErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-21 19:39:30,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:39:30,542 INFO L82 PathProgramCache]: Analyzing trace with hash -227427244, now seen corresponding path program 1 times [2021-10-21 19:39:30,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:39:30,542 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121910277] [2021-10-21 19:39:30,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:30,543 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:39:30,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:30,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:39:30,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:30,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:39:30,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:30,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:39:30,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:30,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-21 19:39:30,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:30,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-21 19:39:30,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:30,815 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-21 19:39:30,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:39:30,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121910277] [2021-10-21 19:39:30,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121910277] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:39:30,816 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:39:30,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-10-21 19:39:30,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770762796] [2021-10-21 19:39:30,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-21 19:39:30,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:39:30,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-21 19:39:30,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:39:30,819 INFO L87 Difference]: Start difference. First operand 136 states and 150 transitions. Second operand has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 9 states have internal predecessors, (39), 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) [2021-10-21 19:39:31,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:39:31,559 INFO L93 Difference]: Finished difference Result 163 states and 178 transitions. [2021-10-21 19:39:31,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-21 19:39:31,560 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 9 states have internal predecessors, (39), 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 53 [2021-10-21 19:39:31,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:39:31,562 INFO L225 Difference]: With dead ends: 163 [2021-10-21 19:39:31,562 INFO L226 Difference]: Without dead ends: 163 [2021-10-21 19:39:31,563 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 261.4ms TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-10-21 19:39:31,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-10-21 19:39:31,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 139. [2021-10-21 19:39:31,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 98 states have (on average 1.336734693877551) internal successors, (131), 118 states have internal predecessors, (131), 12 states have call successors, (12), 10 states have call predecessors, (12), 11 states have return successors, (13), 10 states have call predecessors, (13), 11 states have call successors, (13) [2021-10-21 19:39:31,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 156 transitions. [2021-10-21 19:39:31,570 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 156 transitions. Word has length 53 [2021-10-21 19:39:31,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:39:31,571 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 156 transitions. [2021-10-21 19:39:31,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 9 states have internal predecessors, (39), 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) [2021-10-21 19:39:31,572 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 156 transitions. [2021-10-21 19:39:31,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-10-21 19:39:31,573 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:39:31,573 INFO L512 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, 1, 1, 1] [2021-10-21 19:39:31,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-21 19:39:31,573 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting sll_circular_get_data_atErr3REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-21 19:39:31,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:39:31,574 INFO L82 PathProgramCache]: Analyzing trace with hash -227427243, now seen corresponding path program 1 times [2021-10-21 19:39:31,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:39:31,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681238325] [2021-10-21 19:39:31,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:31,575 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:39:31,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:31,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:39:31,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:31,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:39:31,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:31,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:39:31,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:31,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-21 19:39:31,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:31,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-21 19:39:31,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:31,746 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-21 19:39:31,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:39:31,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681238325] [2021-10-21 19:39:31,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681238325] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:39:31,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153348018] [2021-10-21 19:39:31,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:31,748 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:39:31,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:39:31,749 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:39:31,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-21 19:39:32,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:32,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-21 19:39:32,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:39:32,337 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-21 19:39:32,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153348018] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:39:32,338 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:39:32,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2021-10-21 19:39:32,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952002549] [2021-10-21 19:39:32,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 19:39:32,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:39:32,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 19:39:32,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:39:32,341 INFO L87 Difference]: Start difference. First operand 139 states and 156 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 8 states have internal predecessors, (44), 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) [2021-10-21 19:39:32,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:39:32,710 INFO L93 Difference]: Finished difference Result 169 states and 188 transitions. [2021-10-21 19:39:32,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 19:39:32,712 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 8 states have internal predecessors, (44), 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 53 [2021-10-21 19:39:32,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:39:32,713 INFO L225 Difference]: With dead ends: 169 [2021-10-21 19:39:32,714 INFO L226 Difference]: Without dead ends: 169 [2021-10-21 19:39:32,714 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 140.8ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:39:32,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-10-21 19:39:32,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 148. [2021-10-21 19:39:32,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 106 states have (on average 1.320754716981132) internal successors, (140), 124 states have internal predecessors, (140), 13 states have call successors, (13), 10 states have call predecessors, (13), 11 states have return successors, (14), 13 states have call predecessors, (14), 12 states have call successors, (14) [2021-10-21 19:39:32,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 167 transitions. [2021-10-21 19:39:32,722 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 167 transitions. Word has length 53 [2021-10-21 19:39:32,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:39:32,723 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 167 transitions. [2021-10-21 19:39:32,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 8 states have internal predecessors, (44), 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) [2021-10-21 19:39:32,723 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 167 transitions. [2021-10-21 19:39:32,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-10-21 19:39:32,724 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:39:32,724 INFO L512 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] [2021-10-21 19:39:32,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-21 19:39:32,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-21 19:39:32,950 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)] === [2021-10-21 19:39:32,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:39:32,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1008365047, now seen corresponding path program 1 times [2021-10-21 19:39:32,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:39:32,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232525508] [2021-10-21 19:39:32,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:32,951 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:39:32,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:33,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:39:33,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:33,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:39:33,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:33,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:39:33,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:33,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-21 19:39:33,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:33,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-21 19:39:33,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:33,142 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-21 19:39:33,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:39:33,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232525508] [2021-10-21 19:39:33,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232525508] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:39:33,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043065835] [2021-10-21 19:39:33,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:33,144 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:39:33,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:39:33,146 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:39:33,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-21 19:39:33,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:33,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-21 19:39:33,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:39:33,779 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-21 19:39:33,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043065835] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:39:33,780 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:39:33,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 13 [2021-10-21 19:39:33,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866352701] [2021-10-21 19:39:33,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:39:33,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:39:33,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:39:33,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:39:33,782 INFO L87 Difference]: Start difference. First operand 148 states and 167 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-21 19:39:33,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:39:33,867 INFO L93 Difference]: Finished difference Result 138 states and 150 transitions. [2021-10-21 19:39:33,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 19:39:33,867 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 54 [2021-10-21 19:39:33,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:39:33,869 INFO L225 Difference]: With dead ends: 138 [2021-10-21 19:39:33,869 INFO L226 Difference]: Without dead ends: 138 [2021-10-21 19:39:33,869 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 126.5ms TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-10-21 19:39:33,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-10-21 19:39:33,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 128. [2021-10-21 19:39:33,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 89 states have (on average 1.3146067415730338) internal successors, (117), 107 states have internal predecessors, (117), 12 states have call successors, (12), 9 states have call predecessors, (12), 9 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2021-10-21 19:39:33,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 141 transitions. [2021-10-21 19:39:33,876 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 141 transitions. Word has length 54 [2021-10-21 19:39:33,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:39:33,876 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 141 transitions. [2021-10-21 19:39:33,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-21 19:39:33,876 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 141 transitions. [2021-10-21 19:39:33,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-10-21 19:39:33,877 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:39:33,878 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2021-10-21 19:39:33,914 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-10-21 19:39:34,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-21 19:39:34,094 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting sll_circular_update_atErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-21 19:39:34,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:39:34,094 INFO L82 PathProgramCache]: Analyzing trace with hash 953058577, now seen corresponding path program 3 times [2021-10-21 19:39:34,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:39:34,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363195221] [2021-10-21 19:39:34,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:34,095 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:39:34,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:34,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:39:34,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:34,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:39:34,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:34,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:39:34,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:34,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-21 19:39:34,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:34,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-10-21 19:39:34,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:34,270 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-21 19:39:34,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:39:34,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363195221] [2021-10-21 19:39:34,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363195221] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:39:34,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315622475] [2021-10-21 19:39:34,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:39:34,272 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:39:34,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:39:34,277 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:39:34,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-21 19:39:34,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-21 19:39:34,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:39:34,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-21 19:39:34,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:39:34,867 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-21 19:39:34,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315622475] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:39:34,868 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:39:34,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 10 [2021-10-21 19:39:34,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467062829] [2021-10-21 19:39:34,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 19:39:34,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:39:34,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 19:39:34,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:39:34,871 INFO L87 Difference]: Start difference. First operand 128 states and 141 transitions. Second operand has 10 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 7 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2021-10-21 19:39:35,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:39:35,224 INFO L93 Difference]: Finished difference Result 134 states and 147 transitions. [2021-10-21 19:39:35,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 19:39:35,225 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 7 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) Word has length 55 [2021-10-21 19:39:35,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:39:35,226 INFO L225 Difference]: With dead ends: 134 [2021-10-21 19:39:35,226 INFO L226 Difference]: Without dead ends: 125 [2021-10-21 19:39:35,227 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 151.9ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-10-21 19:39:35,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-10-21 19:39:35,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 106. [2021-10-21 19:39:35,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 73 states have (on average 1.3287671232876712) internal successors, (97), 88 states have internal predecessors, (97), 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) [2021-10-21 19:39:35,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 116 transitions. [2021-10-21 19:39:35,233 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 116 transitions. Word has length 55 [2021-10-21 19:39:35,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:39:35,234 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 116 transitions. [2021-10-21 19:39:35,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 7 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2021-10-21 19:39:35,234 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 116 transitions. [2021-10-21 19:39:35,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-10-21 19:39:35,235 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:39:35,235 INFO L512 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] [2021-10-21 19:39:35,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-21 19:39:35,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-21 19:39:35,454 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting sll_circular_get_data_atErr3REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-21 19:39:35,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:39:35,455 INFO L82 PathProgramCache]: Analyzing trace with hash 886011465, now seen corresponding path program 2 times [2021-10-21 19:39:35,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:39:35,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201085755] [2021-10-21 19:39:35,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:35,455 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:39:35,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:35,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:39:35,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:35,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:39:35,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:35,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:39:35,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:35,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-21 19:39:35,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:35,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-21 19:39:35,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:35,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-10-21 19:39:35,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:35,627 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-10-21 19:39:35,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:39:35,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201085755] [2021-10-21 19:39:35,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201085755] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:39:35,628 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:39:35,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-21 19:39:35,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766378860] [2021-10-21 19:39:35,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 19:39:35,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:39:35,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 19:39:35,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:39:35,630 INFO L87 Difference]: Start difference. First operand 106 states and 116 transitions. Second operand has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-21 19:39:36,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:39:36,132 INFO L93 Difference]: Finished difference Result 141 states and 152 transitions. [2021-10-21 19:39:36,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 19:39:36,133 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 61 [2021-10-21 19:39:36,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:39:36,134 INFO L225 Difference]: With dead ends: 141 [2021-10-21 19:39:36,134 INFO L226 Difference]: Without dead ends: 141 [2021-10-21 19:39:36,135 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 198.7ms TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:39:36,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-10-21 19:39:36,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 116. [2021-10-21 19:39:36,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 82 states have (on average 1.3658536585365855) internal successors, (112), 97 states have internal predecessors, (112), 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) [2021-10-21 19:39:36,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 131 transitions. [2021-10-21 19:39:36,141 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 131 transitions. Word has length 61 [2021-10-21 19:39:36,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:39:36,142 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 131 transitions. [2021-10-21 19:39:36,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-21 19:39:36,142 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 131 transitions. [2021-10-21 19:39:36,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-10-21 19:39:36,143 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:39:36,143 INFO L512 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] [2021-10-21 19:39:36,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-21 19:39:36,144 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting sll_circular_get_data_atErr1REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-21 19:39:36,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:39:36,144 INFO L82 PathProgramCache]: Analyzing trace with hash 886011520, now seen corresponding path program 1 times [2021-10-21 19:39:36,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:39:36,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417280674] [2021-10-21 19:39:36,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:36,145 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:39:36,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:36,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:39:36,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:36,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:39:36,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:36,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:39:36,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:36,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-21 19:39:36,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:36,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-21 19:39:36,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:36,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-10-21 19:39:36,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:36,521 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-21 19:39:36,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:39:36,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417280674] [2021-10-21 19:39:36,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417280674] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:39:36,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:39:36,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-10-21 19:39:36,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211385142] [2021-10-21 19:39:36,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-21 19:39:36,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:39:36,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-21 19:39:36,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:39:36,525 INFO L87 Difference]: Start difference. First operand 116 states and 131 transitions. Second operand has 15 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 9 states have internal predecessors, (41), 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) [2021-10-21 19:39:37,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:39:37,217 INFO L93 Difference]: Finished difference Result 140 states and 153 transitions. [2021-10-21 19:39:37,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-21 19:39:37,224 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 9 states have internal predecessors, (41), 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 61 [2021-10-21 19:39:37,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:39:37,225 INFO L225 Difference]: With dead ends: 140 [2021-10-21 19:39:37,225 INFO L226 Difference]: Without dead ends: 140 [2021-10-21 19:39:37,226 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 318.5ms TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-10-21 19:39:37,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-10-21 19:39:37,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 116. [2021-10-21 19:39:37,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 82 states have (on average 1.329268292682927) internal successors, (109), 97 states have internal predecessors, (109), 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) [2021-10-21 19:39:37,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 128 transitions. [2021-10-21 19:39:37,232 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 128 transitions. Word has length 61 [2021-10-21 19:39:37,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:39:37,232 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 128 transitions. [2021-10-21 19:39:37,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 9 states have internal predecessors, (41), 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) [2021-10-21 19:39:37,232 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 128 transitions. [2021-10-21 19:39:37,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-10-21 19:39:37,233 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:39:37,233 INFO L512 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] [2021-10-21 19:39:37,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-10-21 19:39:37,234 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting sll_circular_get_data_atErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-21 19:39:37,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:39:37,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1699691905, now seen corresponding path program 1 times [2021-10-21 19:39:37,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:39:37,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79943579] [2021-10-21 19:39:37,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:37,235 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:39:37,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:37,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:39:37,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:37,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:39:37,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:37,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:39:37,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:37,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-21 19:39:37,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:37,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-21 19:39:37,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:38,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-10-21 19:39:38,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:38,206 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-21 19:39:38,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:39:38,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79943579] [2021-10-21 19:39:38,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79943579] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:39:38,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338454607] [2021-10-21 19:39:38,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:38,207 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:39:38,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:39:38,210 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:39:38,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-21 19:39:38,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:38,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 84 conjunts are in the unsatisfiable core [2021-10-21 19:39:38,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:39:38,611 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 [2021-10-21 19:39:38,829 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-21 19:39:38,829 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 [2021-10-21 19:39:38,897 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 [2021-10-21 19:39:39,019 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-21 19:39:39,020 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 67 treesize of output 62 [2021-10-21 19:39:39,444 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-21 19:39:39,445 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 [2021-10-21 19:40:05,306 INFO L354 Elim1Store]: treesize reduction 127, result has 15.9 percent of original size [2021-10-21 19:40:05,307 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 [2021-10-21 19:40:05,363 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 18 treesize of output 10 [2021-10-21 19:40:25,229 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-10-21 19:40:25,230 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 40 treesize of output 20 [2021-10-21 19:40:28,189 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 [2021-10-21 19:40:28,201 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 15 refuted. 2 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-21 19:40:28,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338454607] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:40:28,201 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:40:28,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 43 [2021-10-21 19:40:28,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161933462] [2021-10-21 19:40:28,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-10-21 19:40:28,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:40:28,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-10-21 19:40:28,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1725, Unknown=40, NotChecked=0, Total=1892 [2021-10-21 19:40:28,204 INFO L87 Difference]: Start difference. First operand 116 states and 128 transitions. Second operand has 44 states, 43 states have (on average 1.813953488372093) internal successors, (78), 33 states have internal predecessors, (78), 6 states have call successors, (15), 8 states have call predecessors, (15), 9 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2021-10-21 19:41:37,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:41:37,742 INFO L93 Difference]: Finished difference Result 152 states and 168 transitions. [2021-10-21 19:41:37,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-21 19:41:37,743 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.813953488372093) internal successors, (78), 33 states have internal predecessors, (78), 6 states have call successors, (15), 8 states have call predecessors, (15), 9 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) Word has length 64 [2021-10-21 19:41:37,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:41:37,745 INFO L225 Difference]: With dead ends: 152 [2021-10-21 19:41:37,745 INFO L226 Difference]: Without dead ends: 152 [2021-10-21 19:41:37,747 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 50 SyntacticMatches, 8 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 61559.6ms TimeCoverageRelationStatistics Valid=385, Invalid=3729, Unknown=46, NotChecked=0, Total=4160 [2021-10-21 19:41:37,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-10-21 19:41:37,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 124. [2021-10-21 19:41:37,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 90 states have (on average 1.3666666666666667) internal successors, (123), 105 states have internal predecessors, (123), 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) [2021-10-21 19:41:37,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 142 transitions. [2021-10-21 19:41:37,753 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 142 transitions. Word has length 64 [2021-10-21 19:41:37,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:41:37,754 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 142 transitions. [2021-10-21 19:41:37,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.813953488372093) internal successors, (78), 33 states have internal predecessors, (78), 6 states have call successors, (15), 8 states have call predecessors, (15), 9 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2021-10-21 19:41:37,755 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 142 transitions. [2021-10-21 19:41:37,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-10-21 19:41:37,756 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:41:37,756 INFO L512 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] [2021-10-21 19:41:37,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-21 19:41:37,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:41:37,970 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting sll_circular_get_data_atErr3REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-21 19:41:37,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:41:37,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1699691904, now seen corresponding path program 1 times [2021-10-21 19:41:37,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:41:37,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054681987] [2021-10-21 19:41:37,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:41:37,971 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:41:37,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:41:38,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:41:38,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:41:38,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:41:38,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:41:38,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:41:38,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:41:38,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-21 19:41:38,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:41:38,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-21 19:41:38,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:41:39,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-10-21 19:41:39,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:41:39,344 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-21 19:41:39,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:41:39,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054681987] [2021-10-21 19:41:39,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054681987] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:41:39,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625878070] [2021-10-21 19:41:39,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:41:39,345 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:41:39,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:41:39,350 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:41:39,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-21 19:41:39,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:41:39,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 104 conjunts are in the unsatisfiable core [2021-10-21 19:41:39,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:41:39,900 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 [2021-10-21 19:41:39,904 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 [2021-10-21 19:41:40,471 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-21 19:41:40,471 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 [2021-10-21 19:41:40,483 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 [2021-10-21 19:41:40,702 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 [2021-10-21 19:41:40,708 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 18 treesize of output 14 [2021-10-21 19:41:40,998 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-21 19:41:40,998 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 73 treesize of output 55 [2021-10-21 19:41:41,016 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-21 19:41:41,016 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 65 treesize of output 56 [2021-10-21 19:41:41,797 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-21 19:41:41,797 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 62 treesize of output 45 [2021-10-21 19:41:41,818 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-21 19:41:41,819 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 39 treesize of output 27 [2021-10-21 19:41:51,903 INFO L354 Elim1Store]: treesize reduction 74, result has 22.1 percent of original size [2021-10-21 19:41:51,904 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 5 case distinctions, treesize of input 119 treesize of output 97 [2021-10-21 19:41:51,940 INFO L354 Elim1Store]: treesize reduction 90, result has 21.7 percent of original size [2021-10-21 19:41:51,940 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 94 treesize of output 71 [2021-10-21 19:41:52,174 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 37 treesize of output 29 [2021-10-21 19:41:52,178 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 [2021-10-21 19:41:59,244 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-10-21 19:41:59,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 53 [2021-10-21 19:41:59,257 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-10-21 19:41:59,257 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 54 treesize of output 34 [2021-10-21 19:41:59,665 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 51 treesize of output 39 [2021-10-21 19:41:59,668 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 36 treesize of output 24 [2021-10-21 19:41:59,893 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-21 19:41:59,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625878070] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:41:59,893 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:41:59,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 28] total 58 [2021-10-21 19:41:59,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579897292] [2021-10-21 19:41:59,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-10-21 19:41:59,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:41:59,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-10-21 19:41:59,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=3230, Unknown=7, NotChecked=0, Total=3422 [2021-10-21 19:41:59,897 INFO L87 Difference]: Start difference. First operand 124 states and 142 transitions. Second operand has 59 states, 58 states have (on average 1.6724137931034482) internal successors, (97), 46 states have internal predecessors, (97), 8 states have call successors, (15), 8 states have call predecessors, (15), 11 states have return successors, (11), 10 states have call predecessors, (11), 7 states have call successors, (11) [2021-10-21 19:42:07,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:42:07,436 INFO L93 Difference]: Finished difference Result 154 states and 169 transitions. [2021-10-21 19:42:07,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-21 19:42:07,436 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 1.6724137931034482) internal successors, (97), 46 states have internal predecessors, (97), 8 states have call successors, (15), 8 states have call predecessors, (15), 11 states have return successors, (11), 10 states have call predecessors, (11), 7 states have call successors, (11) Word has length 64 [2021-10-21 19:42:07,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:42:07,438 INFO L225 Difference]: With dead ends: 154 [2021-10-21 19:42:07,438 INFO L226 Difference]: Without dead ends: 154 [2021-10-21 19:42:07,441 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 24377.6ms TimeCoverageRelationStatistics Valid=460, Invalid=6175, Unknown=7, NotChecked=0, Total=6642 [2021-10-21 19:42:07,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-10-21 19:42:07,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 123. [2021-10-21 19:42:07,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 89 states have (on average 1.3258426966292134) internal successors, (118), 104 states have internal predecessors, (118), 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) [2021-10-21 19:42:07,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 137 transitions. [2021-10-21 19:42:07,448 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 137 transitions. Word has length 64 [2021-10-21 19:42:07,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:42:07,449 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 137 transitions. [2021-10-21 19:42:07,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 1.6724137931034482) internal successors, (97), 46 states have internal predecessors, (97), 8 states have call successors, (15), 8 states have call predecessors, (15), 11 states have return successors, (11), 10 states have call predecessors, (11), 7 states have call successors, (11) [2021-10-21 19:42:07,450 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 137 transitions. [2021-10-21 19:42:07,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-10-21 19:42:07,451 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:42:07,451 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:42:07,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-21 19:42:07,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-10-21 19:42:07,678 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting sll_circular_get_data_atErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-21 19:42:07,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:42:07,678 INFO L82 PathProgramCache]: Analyzing trace with hash 2144663272, now seen corresponding path program 2 times [2021-10-21 19:42:07,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:42:07,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128317907] [2021-10-21 19:42:07,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:42:07,679 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:42:07,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:07,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:42:07,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:07,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:42:07,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:07,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:42:07,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:07,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-21 19:42:07,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:07,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-21 19:42:07,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:07,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-10-21 19:42:07,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:07,854 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-10-21 19:42:07,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:42:07,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128317907] [2021-10-21 19:42:07,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128317907] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:42:07,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:42:07,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-21 19:42:07,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164372541] [2021-10-21 19:42:07,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 19:42:07,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:42:07,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 19:42:07,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:42:07,859 INFO L87 Difference]: Start difference. First operand 123 states and 137 transitions. Second operand has 11 states, 10 states have (on average 4.1) internal successors, (41), 7 states have internal predecessors, (41), 3 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-21 19:42:08,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:42:08,394 INFO L93 Difference]: Finished difference Result 128 states and 135 transitions. [2021-10-21 19:42:08,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 19:42:08,395 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.1) internal successors, (41), 7 states have internal predecessors, (41), 3 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 67 [2021-10-21 19:42:08,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:42:08,396 INFO L225 Difference]: With dead ends: 128 [2021-10-21 19:42:08,396 INFO L226 Difference]: Without dead ends: 128 [2021-10-21 19:42:08,397 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 213.5ms TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-10-21 19:42:08,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-10-21 19:42:08,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 109. [2021-10-21 19:42:08,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 79 states have (on average 1.2151898734177216) internal successors, (96), 90 states have internal predecessors, (96), 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) [2021-10-21 19:42:08,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 115 transitions. [2021-10-21 19:42:08,403 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 115 transitions. Word has length 67 [2021-10-21 19:42:08,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:42:08,403 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 115 transitions. [2021-10-21 19:42:08,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.1) internal successors, (41), 7 states have internal predecessors, (41), 3 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-21 19:42:08,404 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 115 transitions. [2021-10-21 19:42:08,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-10-21 19:42:08,405 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:42:08,405 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:42:08,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-10-21 19:42:08,405 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-21 19:42:08,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:42:08,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1624212225, now seen corresponding path program 1 times [2021-10-21 19:42:08,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:42:08,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558426731] [2021-10-21 19:42:08,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:42:08,407 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:42:08,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:08,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:42:08,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:08,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:42:08,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:09,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:42:09,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:09,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-21 19:42:09,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:09,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-21 19:42:09,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:09,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-10-21 19:42:09,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:10,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-10-21 19:42:10,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:10,309 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-21 19:42:10,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:42:10,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558426731] [2021-10-21 19:42:10,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558426731] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:42:10,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502908586] [2021-10-21 19:42:10,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:42:10,310 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:42:10,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:42:10,312 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:42:10,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-21 19:42:10,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:10,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 116 conjunts are in the unsatisfiable core [2021-10-21 19:42:10,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:42:10,905 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 [2021-10-21 19:42:11,248 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-21 19:42:11,248 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 [2021-10-21 19:42:11,366 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 [2021-10-21 19:42:11,533 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-21 19:42:11,533 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 [2021-10-21 19:42:12,451 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 104 treesize of output 96 [2021-10-21 19:42:12,468 INFO L354 Elim1Store]: treesize reduction 31, result has 38.0 percent of original size [2021-10-21 19:42:12,469 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 96 treesize of output 90 [2021-10-21 19:42:12,675 INFO L354 Elim1Store]: treesize reduction 86, result has 22.5 percent of original size [2021-10-21 19:42:12,675 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 75 [2021-10-21 19:42:14,839 WARN L860 $PredicateComparison]: unable to prove that (exists ((sll_circular_update_at_~head.offset Int) (sll_circular_update_at_~data Int)) (let ((.cse0 (+ sll_circular_update_at_~head.offset 4))) (and (= |c_#memory_int| (store |c_old(#memory_int)| |c_sll_circular_update_at_#in~head.base| (store (select |c_old(#memory_int)| |c_sll_circular_update_at_#in~head.base|) .cse0 sll_circular_update_at_~data))) (= |c_#memory_$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 [2021-10-21 19:42:14,915 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-10-21 19:42:14,916 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 84 treesize of output 64 [2021-10-21 19:42:14,934 INFO L354 Elim1Store]: treesize reduction 59, result has 22.4 percent of original size [2021-10-21 19:42:14,934 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 65 treesize of output 64 [2021-10-21 19:42:14,950 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-10-21 19:42:14,950 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 52 treesize of output 36 [2021-10-21 19:42:16,551 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-21 19:42:16,552 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 92 treesize of output 80 [2021-10-21 19:42:16,570 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-21 19:42:16,570 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 80 treesize of output 76 [2021-10-21 19:42:16,587 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-21 19:42:16,588 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 64 treesize of output 62 [2021-10-21 19:42:16,758 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 2 not checked. [2021-10-21 19:42:16,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502908586] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:42:16,759 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:42:16,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 68 [2021-10-21 19:42:16,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625685886] [2021-10-21 19:42:16,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-10-21 19:42:16,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:42:16,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-10-21 19:42:16,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=4247, Unknown=1, NotChecked=130, Total=4556 [2021-10-21 19:42:16,764 INFO L87 Difference]: Start difference. First operand 109 states and 115 transitions. Second operand has 68 states, 64 states have (on average 1.578125) internal successors, (101), 56 states have internal predecessors, (101), 9 states have call successors, (15), 7 states have call predecessors, (15), 12 states have return successors, (13), 12 states have call predecessors, (13), 9 states have call successors, (13) [2021-10-21 19:42:34,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:42:34,713 INFO L93 Difference]: Finished difference Result 132 states and 138 transitions. [2021-10-21 19:42:34,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-21 19:42:34,714 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 64 states have (on average 1.578125) internal successors, (101), 56 states have internal predecessors, (101), 9 states have call successors, (15), 7 states have call predecessors, (15), 12 states have return successors, (13), 12 states have call predecessors, (13), 9 states have call successors, (13) Word has length 70 [2021-10-21 19:42:34,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:42:34,715 INFO L225 Difference]: With dead ends: 132 [2021-10-21 19:42:34,715 INFO L226 Difference]: Without dead ends: 132 [2021-10-21 19:42:34,718 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1357 ImplicationChecksByTransitivity, 20598.6ms TimeCoverageRelationStatistics Valid=498, Invalid=9196, Unknown=12, NotChecked=194, Total=9900 [2021-10-21 19:42:34,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-10-21 19:42:34,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 109. [2021-10-21 19:42:34,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 79 states have (on average 1.2025316455696202) internal successors, (95), 90 states have internal predecessors, (95), 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) [2021-10-21 19:42:34,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 114 transitions. [2021-10-21 19:42:34,723 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 114 transitions. Word has length 70 [2021-10-21 19:42:34,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:42:34,724 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 114 transitions. [2021-10-21 19:42:34,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 64 states have (on average 1.578125) internal successors, (101), 56 states have internal predecessors, (101), 9 states have call successors, (15), 7 states have call predecessors, (15), 12 states have return successors, (13), 12 states have call predecessors, (13), 9 states have call successors, (13) [2021-10-21 19:42:34,724 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 114 transitions. [2021-10-21 19:42:34,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-10-21 19:42:34,725 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:42:34,725 INFO L512 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] [2021-10-21 19:42:34,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-21 19:42:34,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:42:34,939 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-21 19:42:34,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:42:34,939 INFO L82 PathProgramCache]: Analyzing trace with hash -734251570, now seen corresponding path program 1 times [2021-10-21 19:42:34,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:42:34,939 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266493109] [2021-10-21 19:42:34,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:42:34,940 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:42:34,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:35,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:42:35,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:35,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:42:35,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:35,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:42:35,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:35,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-21 19:42:35,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:35,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-21 19:42:35,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:35,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-10-21 19:42:35,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:35,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-10-21 19:42:35,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:35,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-10-21 19:42:35,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:35,678 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 19 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-21 19:42:35,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:42:35,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266493109] [2021-10-21 19:42:35,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266493109] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:42:35,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343137862] [2021-10-21 19:42:35,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:42:35,679 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:42:35,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:42:35,682 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:42:35,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-21 19:42:36,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:36,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 56 conjunts are in the unsatisfiable core [2021-10-21 19:42:36,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:42:36,514 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 [2021-10-21 19:42:37,176 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-10-21 19:42:37,176 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 28 treesize of output 10 [2021-10-21 19:42:37,227 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-21 19:42:37,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343137862] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:42:37,227 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:42:37,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 17] total 40 [2021-10-21 19:42:37,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315476061] [2021-10-21 19:42:37,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-10-21 19:42:37,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:42:37,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-10-21 19:42:37,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1448, Unknown=0, NotChecked=0, Total=1560 [2021-10-21 19:42:37,230 INFO L87 Difference]: Start difference. First operand 109 states and 114 transitions. Second operand has 40 states, 36 states have (on average 2.9444444444444446) internal successors, (106), 35 states have internal predecessors, (106), 10 states have call successors, (17), 5 states have call predecessors, (17), 8 states have return successors, (14), 12 states have call predecessors, (14), 10 states have call successors, (14) [2021-10-21 19:42:39,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:42:39,332 INFO L93 Difference]: Finished difference Result 140 states and 146 transitions. [2021-10-21 19:42:39,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-21 19:42:39,338 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 36 states have (on average 2.9444444444444446) internal successors, (106), 35 states have internal predecessors, (106), 10 states have call successors, (17), 5 states have call predecessors, (17), 8 states have return successors, (14), 12 states have call predecessors, (14), 10 states have call successors, (14) Word has length 81 [2021-10-21 19:42:39,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:42:39,339 INFO L225 Difference]: With dead ends: 140 [2021-10-21 19:42:39,339 INFO L226 Difference]: Without dead ends: 140 [2021-10-21 19:42:39,341 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 954 ImplicationChecksByTransitivity, 1809.8ms TimeCoverageRelationStatistics Valid=360, Invalid=3800, Unknown=0, NotChecked=0, Total=4160 [2021-10-21 19:42:39,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-10-21 19:42:39,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 115. [2021-10-21 19:42:39,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 84 states have (on average 1.1904761904761905) internal successors, (100), 95 states have internal predecessors, (100), 10 states have call successors, (10), 9 states have call predecessors, (10), 9 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2021-10-21 19:42:39,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 120 transitions. [2021-10-21 19:42:39,346 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 120 transitions. Word has length 81 [2021-10-21 19:42:39,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:42:39,347 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 120 transitions. [2021-10-21 19:42:39,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 36 states have (on average 2.9444444444444446) internal successors, (106), 35 states have internal predecessors, (106), 10 states have call successors, (17), 5 states have call predecessors, (17), 8 states have return successors, (14), 12 states have call predecessors, (14), 10 states have call successors, (14) [2021-10-21 19:42:39,348 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 120 transitions. [2021-10-21 19:42:39,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-10-21 19:42:39,349 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:42:39,349 INFO L512 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] [2021-10-21 19:42:39,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-21 19:42:39,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:42:39,567 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-21 19:42:39,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:42:39,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1897701511, now seen corresponding path program 2 times [2021-10-21 19:42:39,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:42:39,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251282490] [2021-10-21 19:42:39,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:42:39,568 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:42:39,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:39,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:42:39,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:39,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:42:39,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:39,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:42:39,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:39,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-21 19:42:39,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:39,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-21 19:42:39,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:39,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-10-21 19:42:39,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:39,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-10-21 19:42:39,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:39,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-10-21 19:42:39,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:39,789 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-21 19:42:39,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:42:39,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251282490] [2021-10-21 19:42:39,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251282490] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:42:39,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657005185] [2021-10-21 19:42:39,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:42:39,791 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:42:39,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:42:39,792 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:42:39,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-21 19:42:40,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:42:40,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:42:40,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-21 19:42:40,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:42:40,945 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-21 19:42:40,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657005185] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:42:40,946 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:42:40,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 15 [2021-10-21 19:42:40,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321473180] [2021-10-21 19:42:40,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-21 19:42:40,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:42:40,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-21 19:42:40,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:42:40,948 INFO L87 Difference]: Start difference. First operand 115 states and 120 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 12 states have internal predecessors, (74), 6 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2021-10-21 19:42:41,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:42:41,422 INFO L93 Difference]: Finished difference Result 130 states and 135 transitions. [2021-10-21 19:42:41,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-21 19:42:41,423 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 12 states have internal predecessors, (74), 6 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) Word has length 84 [2021-10-21 19:42:41,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:42:41,424 INFO L225 Difference]: With dead ends: 130 [2021-10-21 19:42:41,424 INFO L226 Difference]: Without dead ends: 123 [2021-10-21 19:42:41,424 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 253.2ms TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-10-21 19:42:41,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-10-21 19:42:41,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 104. [2021-10-21 19:42:41,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 75 states have (on average 1.1866666666666668) internal successors, (89), 85 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) [2021-10-21 19:42:41,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2021-10-21 19:42:41,429 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 84 [2021-10-21 19:42:41,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:42:41,430 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2021-10-21 19:42:41,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 12 states have internal predecessors, (74), 6 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2021-10-21 19:42:41,430 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2021-10-21 19:42:41,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-10-21 19:42:41,431 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:42:41,432 INFO L512 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] [2021-10-21 19:42:41,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-21 19:42:41,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-21 19:42:41,654 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting sll_circular_destroyErr0REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-21 19:42:41,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:42:41,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1533729650, now seen corresponding path program 1 times [2021-10-21 19:42:41,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:42:41,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623319316] [2021-10-21 19:42:41,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:42:41,654 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:42:41,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:41,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:42:41,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:41,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:42:41,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:41,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:42:41,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:41,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-21 19:42:41,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:41,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-21 19:42:41,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:41,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-10-21 19:42:41,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:41,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-10-21 19:42:41,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:41,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-10-21 19:42:41,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:41,821 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-10-21 19:42:41,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:42:41,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623319316] [2021-10-21 19:42:41,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623319316] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:42:41,822 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:42:41,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-21 19:42:41,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535180845] [2021-10-21 19:42:41,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 19:42:41,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:42:41,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 19:42:41,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:42:41,825 INFO L87 Difference]: Start difference. First operand 104 states and 108 transitions. Second operand has 10 states, 9 states have (on average 6.111111111111111) internal successors, (55), 6 states have internal predecessors, (55), 2 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-10-21 19:42:42,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:42:42,401 INFO L93 Difference]: Finished difference Result 124 states and 128 transitions. [2021-10-21 19:42:42,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 19:42:42,402 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 6.111111111111111) internal successors, (55), 6 states have internal predecessors, (55), 2 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 86 [2021-10-21 19:42:42,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:42:42,403 INFO L225 Difference]: With dead ends: 124 [2021-10-21 19:42:42,403 INFO L226 Difference]: Without dead ends: 124 [2021-10-21 19:42:42,404 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 229.1ms TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-10-21 19:42:42,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-10-21 19:42:42,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 107. [2021-10-21 19:42:42,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 79 states have (on average 1.2025316455696202) internal successors, (95), 88 states have internal predecessors, (95), 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) [2021-10-21 19:42:42,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 114 transitions. [2021-10-21 19:42:42,409 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 114 transitions. Word has length 86 [2021-10-21 19:42:42,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:42:42,409 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 114 transitions. [2021-10-21 19:42:42,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 6.111111111111111) internal successors, (55), 6 states have internal predecessors, (55), 2 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-10-21 19:42:42,410 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 114 transitions. [2021-10-21 19:42:42,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-10-21 19:42:42,411 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:42:42,411 INFO L512 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] [2021-10-21 19:42:42,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-10-21 19:42:42,411 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting sll_circular_destroyErr1REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-21 19:42:42,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:42:42,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1533729649, now seen corresponding path program 1 times [2021-10-21 19:42:42,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:42:42,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650639270] [2021-10-21 19:42:42,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:42:42,413 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:42:42,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:42,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:42:42,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:42,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:42:42,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:42,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:42:42,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:42,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-21 19:42:42,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:42,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-21 19:42:42,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:42,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-10-21 19:42:42,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:42,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-10-21 19:42:42,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:42,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-10-21 19:42:42,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:42,752 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-21 19:42:42,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:42:42,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650639270] [2021-10-21 19:42:42,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650639270] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:42:42,753 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:42:42,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-10-21 19:42:42,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207252770] [2021-10-21 19:42:42,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-21 19:42:42,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:42:42,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-21 19:42:42,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:42:42,755 INFO L87 Difference]: Start difference. First operand 107 states and 114 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) [2021-10-21 19:42:43,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:42:43,511 INFO L93 Difference]: Finished difference Result 118 states and 123 transitions. [2021-10-21 19:42:43,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-21 19:42:43,511 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 [2021-10-21 19:42:43,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:42:43,513 INFO L225 Difference]: With dead ends: 118 [2021-10-21 19:42:43,513 INFO L226 Difference]: Without dead ends: 118 [2021-10-21 19:42:43,513 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 381.7ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-10-21 19:42:43,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-10-21 19:42:43,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 105. [2021-10-21 19:42:43,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 79 states have (on average 1.1645569620253164) internal successors, (92), 86 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) [2021-10-21 19:42:43,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 111 transitions. [2021-10-21 19:42:43,518 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 111 transitions. Word has length 86 [2021-10-21 19:42:43,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:42:43,519 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 111 transitions. [2021-10-21 19:42:43,519 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) [2021-10-21 19:42:43,519 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 111 transitions. [2021-10-21 19:42:43,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-10-21 19:42:43,520 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:42:43,520 INFO L512 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] [2021-10-21 19:42:43,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-10-21 19:42:43,521 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting sll_circular_destroyErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-21 19:42:43,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:42:43,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1477834531, now seen corresponding path program 1 times [2021-10-21 19:42:43,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:42:43,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212654863] [2021-10-21 19:42:43,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:42:43,522 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:42:43,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:43,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:42:43,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:43,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:42:43,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:43,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:42:43,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:43,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-21 19:42:43,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:43,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-21 19:42:43,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:43,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-10-21 19:42:43,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:43,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-10-21 19:42:43,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:43,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-10-21 19:42:43,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:43,744 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-10-21 19:42:43,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:42:43,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212654863] [2021-10-21 19:42:43,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212654863] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:42:43,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791402208] [2021-10-21 19:42:43,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:42:43,745 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:42:43,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:42:43,750 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:42:43,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-21 19:42:44,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:44,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 56 conjunts are in the unsatisfiable core [2021-10-21 19:42:44,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:42:45,162 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 [2021-10-21 19:42:45,174 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-21 19:42:45,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791402208] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:42:45,175 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:42:45,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 25 [2021-10-21 19:42:45,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557067536] [2021-10-21 19:42:45,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-21 19:42:45,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:42:45,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-21 19:42:45,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=593, Unknown=0, NotChecked=0, Total=650 [2021-10-21 19:42:45,177 INFO L87 Difference]: Start difference. First operand 105 states and 111 transitions. Second operand has 26 states, 25 states have (on average 3.68) internal successors, (92), 19 states have internal predecessors, (92), 4 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2021-10-21 19:42:46,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:42:46,466 INFO L93 Difference]: Finished difference Result 118 states and 122 transitions. [2021-10-21 19:42:46,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-21 19:42:46,466 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 3.68) internal successors, (92), 19 states have internal predecessors, (92), 4 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) Word has length 89 [2021-10-21 19:42:46,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:42:46,467 INFO L225 Difference]: With dead ends: 118 [2021-10-21 19:42:46,467 INFO L226 Difference]: Without dead ends: 118 [2021-10-21 19:42:46,468 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 945.9ms TimeCoverageRelationStatistics Valid=185, Invalid=1537, Unknown=0, NotChecked=0, Total=1722 [2021-10-21 19:42:46,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-10-21 19:42:46,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 105. [2021-10-21 19:42:46,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 80 states have (on average 1.1625) internal successors, (93), 86 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) [2021-10-21 19:42:46,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 112 transitions. [2021-10-21 19:42:46,471 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 112 transitions. Word has length 89 [2021-10-21 19:42:46,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:42:46,472 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 112 transitions. [2021-10-21 19:42:46,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 3.68) internal successors, (92), 19 states have internal predecessors, (92), 4 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2021-10-21 19:42:46,472 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 112 transitions. [2021-10-21 19:42:46,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-10-21 19:42:46,473 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:42:46,473 INFO L512 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] [2021-10-21 19:42:46,498 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-10-21 19:42:46,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-21 19:42:46,692 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting sll_circular_destroyErr3REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-21 19:42:46,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:42:46,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1477834530, now seen corresponding path program 1 times [2021-10-21 19:42:46,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:42:46,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366584352] [2021-10-21 19:42:46,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:42:46,693 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:42:46,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:46,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:42:46,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:46,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:42:46,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:47,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:42:47,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:47,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-21 19:42:47,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:47,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-21 19:42:47,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:47,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-10-21 19:42:47,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:47,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-10-21 19:42:47,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:48,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-10-21 19:42:48,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:48,043 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 23 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-21 19:42:48,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:42:48,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366584352] [2021-10-21 19:42:48,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366584352] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:42:48,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290744440] [2021-10-21 19:42:48,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:42:48,044 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:42:48,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:42:48,049 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:42:48,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-21 19:42:48,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:42:48,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 110 conjunts are in the unsatisfiable core [2021-10-21 19:42:48,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:42:48,948 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 [2021-10-21 19:42:49,280 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-21 19:42:49,281 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 [2021-10-21 19:42:49,419 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 [2021-10-21 19:42:49,430 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 [2021-10-21 19:42:49,608 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-21 19:42:49,609 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 [2021-10-21 19:42:49,620 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-21 19:42:49,620 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 [2021-10-21 19:42:51,854 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 [2021-10-21 19:42:51,884 INFO L354 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2021-10-21 19:42:51,884 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 86 treesize of output 65 [2021-10-21 19:42:51,917 INFO L354 Elim1Store]: treesize reduction 60, result has 36.8 percent of original size [2021-10-21 19:42:51,918 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 59 treesize of output 62 [2021-10-21 19:42:53,787 WARN L860 $PredicateComparison]: unable to prove that (exists ((sll_circular_update_at_~head.offset Int)) (and (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_sll_circular_update_at_#in~head.base| (let ((.cse0 (+ sll_circular_update_at_~head.offset 4))) (store (select |c_old(#memory_$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_sll_circular_update_at_#in~head.offset| sll_circular_update_at_~head.offset))) is different from true [2021-10-21 19:42:53,831 INFO L354 Elim1Store]: treesize reduction 66, result has 24.1 percent of original size [2021-10-21 19:42:53,831 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 64 treesize of output 53 [2021-10-21 19:43:05,361 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 80 treesize of output 72 [2021-10-21 19:43:05,371 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-10-21 19:43:05,372 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 72 treesize of output 55 [2021-10-21 19:43:05,518 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 2 not checked. [2021-10-21 19:43:05,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290744440] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:05,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:43:05,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 67 [2021-10-21 19:43:05,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635231285] [2021-10-21 19:43:05,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-10-21 19:43:05,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:43:05,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-10-21 19:43:05,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=4096, Unknown=2, NotChecked=258, Total=4556 [2021-10-21 19:43:05,523 INFO L87 Difference]: Start difference. First operand 105 states and 112 transitions. Second operand has 68 states, 67 states have (on average 1.8805970149253732) internal successors, (126), 54 states have internal predecessors, (126), 11 states have call successors, (19), 10 states have call predecessors, (19), 13 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2021-10-21 19:43:19,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:43:19,342 INFO L93 Difference]: Finished difference Result 115 states and 120 transitions. [2021-10-21 19:43:19,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-21 19:43:19,343 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 1.8805970149253732) internal successors, (126), 54 states have internal predecessors, (126), 11 states have call successors, (19), 10 states have call predecessors, (19), 13 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) Word has length 89 [2021-10-21 19:43:19,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:43:19,344 INFO L225 Difference]: With dead ends: 115 [2021-10-21 19:43:19,344 INFO L226 Difference]: Without dead ends: 115 [2021-10-21 19:43:19,347 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1665 ImplicationChecksByTransitivity, 12850.5ms TimeCoverageRelationStatistics Valid=568, Invalid=8368, Unknown=2, NotChecked=374, Total=9312 [2021-10-21 19:43:19,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-10-21 19:43:19,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 107. [2021-10-21 19:43:19,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 82 states have (on average 1.146341463414634) internal successors, (94), 88 states have internal predecessors, (94), 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) [2021-10-21 19:43:19,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 113 transitions. [2021-10-21 19:43:19,352 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 113 transitions. Word has length 89 [2021-10-21 19:43:19,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:43:19,352 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 113 transitions. [2021-10-21 19:43:19,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 1.8805970149253732) internal successors, (126), 54 states have internal predecessors, (126), 11 states have call successors, (19), 10 states have call predecessors, (19), 13 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2021-10-21 19:43:19,353 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 113 transitions. [2021-10-21 19:43:19,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-10-21 19:43:19,353 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:43:19,354 INFO L512 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] [2021-10-21 19:43:19,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:19,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-21 19:43:19,558 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr1ENSURES_VIOLATIONMEMORY_LEAK === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-21 19:43:19,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:19,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1445302179, now seen corresponding path program 1 times [2021-10-21 19:43:19,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:19,558 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846388451] [2021-10-21 19:43:19,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:19,558 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:19,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:19,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:43:19,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:19,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:43:19,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:19,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:43:19,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:19,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-21 19:43:19,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:19,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-21 19:43:19,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:19,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-10-21 19:43:19,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:19,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-10-21 19:43:19,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:19,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-10-21 19:43:19,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:19,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-10-21 19:43:19,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:19,808 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-21 19:43:19,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:43:19,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846388451] [2021-10-21 19:43:19,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846388451] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:43:19,809 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:43:19,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-10-21 19:43:19,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184024244] [2021-10-21 19:43:19,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-21 19:43:19,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:43:19,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-21 19:43:19,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-10-21 19:43:19,812 INFO L87 Difference]: Start difference. First operand 107 states and 113 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) [2021-10-21 19:43:20,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:43:20,381 INFO L93 Difference]: Finished difference Result 113 states and 117 transitions. [2021-10-21 19:43:20,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-21 19:43:20,382 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 [2021-10-21 19:43:20,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:43:20,383 INFO L225 Difference]: With dead ends: 113 [2021-10-21 19:43:20,383 INFO L226 Difference]: Without dead ends: 111 [2021-10-21 19:43:20,383 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 275.1ms TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-10-21 19:43:20,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-10-21 19:43:20,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2021-10-21 19:43:20,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 82 states have (on average 1.1341463414634145) 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) [2021-10-21 19:43:20,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 112 transitions. [2021-10-21 19:43:20,387 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 112 transitions. Word has length 89 [2021-10-21 19:43:20,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:43:20,388 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 112 transitions. [2021-10-21 19:43:20,388 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) [2021-10-21 19:43:20,388 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 112 transitions. [2021-10-21 19:43:20,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-10-21 19:43:20,389 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:43:20,389 INFO L512 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] [2021-10-21 19:43:20,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-10-21 19:43:20,390 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting sll_circular_destroyErr8ASSERT_VIOLATIONMEMORY_FREE === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-21 19:43:20,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:20,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1431768405, now seen corresponding path program 1 times [2021-10-21 19:43:20,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:20,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560488770] [2021-10-21 19:43:20,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:20,391 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:20,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:20,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:43:20,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:20,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:43:20,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:20,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:43:20,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:20,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-21 19:43:20,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:20,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-21 19:43:20,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:20,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-10-21 19:43:20,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:20,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-10-21 19:43:20,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:20,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-10-21 19:43:20,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:20,667 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-21 19:43:20,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:43:20,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560488770] [2021-10-21 19:43:20,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560488770] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:43:20,668 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:43:20,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-10-21 19:43:20,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222087476] [2021-10-21 19:43:20,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-21 19:43:20,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:43:20,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-21 19:43:20,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:43:20,670 INFO L87 Difference]: Start difference. First operand 107 states and 112 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) [2021-10-21 19:43:21,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:43:21,263 INFO L93 Difference]: Finished difference Result 109 states and 113 transitions. [2021-10-21 19:43:21,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-21 19:43:21,264 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 [2021-10-21 19:43:21,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:43:21,265 INFO L225 Difference]: With dead ends: 109 [2021-10-21 19:43:21,265 INFO L226 Difference]: Without dead ends: 109 [2021-10-21 19:43:21,266 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 302.7ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-10-21 19:43:21,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-10-21 19:43:21,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 106. [2021-10-21 19:43:21,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 82 states have (on average 1.1097560975609757) internal successors, (91), 87 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) [2021-10-21 19:43:21,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 110 transitions. [2021-10-21 19:43:21,270 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 110 transitions. Word has length 90 [2021-10-21 19:43:21,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:43:21,270 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 110 transitions. [2021-10-21 19:43:21,271 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) [2021-10-21 19:43:21,271 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 110 transitions. [2021-10-21 19:43:21,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-10-21 19:43:21,272 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:43:21,272 INFO L512 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] [2021-10-21 19:43:21,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-10-21 19:43:21,273 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting sll_circular_destroyErr5ASSERT_VIOLATIONMEMORY_FREE === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-21 19:43:21,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:21,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1541324730, now seen corresponding path program 1 times [2021-10-21 19:43:21,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:21,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73688308] [2021-10-21 19:43:21,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:21,274 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:21,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:21,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:43:21,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:21,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:43:21,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:21,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:43:21,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:21,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-21 19:43:21,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:21,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-21 19:43:21,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:22,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-10-21 19:43:22,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:22,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-10-21 19:43:22,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:22,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-10-21 19:43:22,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:22,139 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-21 19:43:22,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:43:22,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73688308] [2021-10-21 19:43:22,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73688308] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:22,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134711081] [2021-10-21 19:43:22,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:22,140 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:43:22,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:22,158 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:43:22,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-21 19:43:23,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:23,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 87 conjunts are in the unsatisfiable core [2021-10-21 19:43:23,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:43:23,207 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 [2021-10-21 19:43:23,301 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 [2021-10-21 19:43:23,417 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-21 19:43:23,417 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 [2021-10-21 19:43:23,460 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 [2021-10-21 19:43:23,555 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-21 19:43:23,555 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 [2021-10-21 19:43:23,817 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-21 19:43:23,817 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 [2021-10-21 19:43:25,000 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 [2021-10-21 19:43:25,042 INFO L354 Elim1Store]: treesize reduction 127, result has 15.9 percent of original size [2021-10-21 19:43:25,042 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 [2021-10-21 19:43:25,101 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 18 treesize of output 10 [2021-10-21 19:43:25,940 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 [2021-10-21 19:43:25,965 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-10-21 19:43:25,966 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 40 treesize of output 20 [2021-10-21 19:43:26,504 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 [2021-10-21 19:43:26,574 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 18 trivial. 2 not checked. [2021-10-21 19:43:26,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134711081] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:26,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:43:26,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 45 [2021-10-21 19:43:26,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228995143] [2021-10-21 19:43:26,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-10-21 19:43:26,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:43:26,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-10-21 19:43:26,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1752, Unknown=2, NotChecked=170, Total=2070 [2021-10-21 19:43:26,576 INFO L87 Difference]: Start difference. First operand 106 states and 110 transitions. Second operand has 46 states, 45 states have (on average 2.4) internal successors, (108), 35 states have internal predecessors, (108), 6 states have call successors, (17), 9 states have call predecessors, (17), 10 states have return successors, (11), 8 states have call predecessors, (11), 6 states have call successors, (11) [2021-10-21 19:43:33,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:43:33,084 INFO L93 Difference]: Finished difference Result 110 states and 114 transitions. [2021-10-21 19:43:33,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-21 19:43:33,085 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.4) internal successors, (108), 35 states have internal predecessors, (108), 6 states have call successors, (17), 9 states have call predecessors, (17), 10 states have return successors, (11), 8 states have call predecessors, (11), 6 states have call successors, (11) Word has length 92 [2021-10-21 19:43:33,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:43:33,086 INFO L225 Difference]: With dead ends: 110 [2021-10-21 19:43:33,086 INFO L226 Difference]: Without dead ends: 110 [2021-10-21 19:43:33,087 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 80 SyntacticMatches, 9 SemanticMatches, 66 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 8614.7ms TimeCoverageRelationStatistics Valid=432, Invalid=3864, Unknown=2, NotChecked=258, Total=4556 [2021-10-21 19:43:33,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-10-21 19:43:33,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2021-10-21 19:43:33,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 83 states have (on average 1.108433734939759) 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) [2021-10-21 19:43:33,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2021-10-21 19:43:33,093 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 92 [2021-10-21 19:43:33,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:43:33,093 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2021-10-21 19:43:33,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.4) internal successors, (108), 35 states have internal predecessors, (108), 6 states have call successors, (17), 9 states have call predecessors, (17), 10 states have return successors, (11), 8 states have call predecessors, (11), 6 states have call successors, (11) [2021-10-21 19:43:33,094 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2021-10-21 19:43:33,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-10-21 19:43:33,095 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:43:33,095 INFO L512 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] [2021-10-21 19:43:33,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:33,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:43:33,321 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting sll_circular_destroyErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-21 19:43:33,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:33,322 INFO L82 PathProgramCache]: Analyzing trace with hash 109821506, now seen corresponding path program 1 times [2021-10-21 19:43:33,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:33,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15794233] [2021-10-21 19:43:33,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:33,322 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:33,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:33,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:43:33,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:33,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:43:33,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:34,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:43:34,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:34,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-21 19:43:34,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:34,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-21 19:43:34,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:34,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-10-21 19:43:34,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:35,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-10-21 19:43:35,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:35,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-10-21 19:43:35,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:35,074 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-21 19:43:35,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:43:35,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15794233] [2021-10-21 19:43:35,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15794233] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:35,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541646131] [2021-10-21 19:43:35,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:35,075 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:43:35,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:35,078 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:43:35,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-21 19:43:36,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:36,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 122 conjunts are in the unsatisfiable core [2021-10-21 19:43:36,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:43:36,272 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 [2021-10-21 19:43:36,602 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-21 19:43:36,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-21 19:43:36,757 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 [2021-10-21 19:43:36,761 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 [2021-10-21 19:43:36,929 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-21 19:43:36,929 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 62 treesize of output 48 [2021-10-21 19:43:36,941 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-21 19:43:36,942 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 54 treesize of output 44 [2021-10-21 19:43:39,579 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 [2021-10-21 19:43:39,641 INFO L354 Elim1Store]: treesize reduction 153, result has 12.6 percent of original size [2021-10-21 19:43:39,642 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 115 treesize of output 94 [2021-10-21 19:43:39,672 INFO L354 Elim1Store]: treesize reduction 165, result has 11.8 percent of original size [2021-10-21 19:43:39,673 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 84 treesize of output 53 [2021-10-21 19:43:41,561 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 [2021-10-21 19:43:41,626 INFO L354 Elim1Store]: treesize reduction 88, result has 17.8 percent of original size [2021-10-21 19:43:41,626 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 87 treesize of output 69 [2021-10-21 19:43:41,652 INFO L354 Elim1Store]: treesize reduction 88, result has 17.8 percent of original size [2021-10-21 19:43:41,652 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 68 treesize of output 50 [2021-10-21 19:43:44,896 INFO L354 Elim1Store]: treesize reduction 69, result has 9.2 percent of original size [2021-10-21 19:43:44,896 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 75 treesize of output 55 [2021-10-21 19:43:44,913 INFO L354 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2021-10-21 19:43:44,913 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 40 treesize of output 29 [2021-10-21 19:43:45,177 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 2 not checked. [2021-10-21 19:43:45,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541646131] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:45,178 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:43:45,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 33] total 63 [2021-10-21 19:43:45,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512413590] [2021-10-21 19:43:45,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-10-21 19:43:45,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:43:45,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-10-21 19:43:45,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=3469, Unknown=3, NotChecked=238, Total=3906 [2021-10-21 19:43:45,180 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand has 63 states, 63 states have (on average 1.9841269841269842) internal successors, (125), 50 states have internal predecessors, (125), 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) [2021-10-21 19:44:03,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:44:03,776 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2021-10-21 19:44:03,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-21 19:44:03,777 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.9841269841269842) internal successors, (125), 50 states have internal predecessors, (125), 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 [2021-10-21 19:44:03,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:44:03,778 INFO L225 Difference]: With dead ends: 96 [2021-10-21 19:44:03,778 INFO L226 Difference]: Without dead ends: 96 [2021-10-21 19:44:03,779 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 75 SyntacticMatches, 4 SemanticMatches, 84 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1163 ImplicationChecksByTransitivity, 18146.8ms TimeCoverageRelationStatistics Valid=499, Invalid=6478, Unknown=3, NotChecked=330, Total=7310 [2021-10-21 19:44:03,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-10-21 19:44:03,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-10-21 19:44:03,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 77 states have internal predecessors, (79), 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) [2021-10-21 19:44:03,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2021-10-21 19:44:03,782 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 95 [2021-10-21 19:44:03,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:44:03,783 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2021-10-21 19:44:03,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.9841269841269842) internal successors, (125), 50 states have internal predecessors, (125), 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) [2021-10-21 19:44:03,784 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2021-10-21 19:44:03,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-10-21 19:44:03,785 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:44:03,785 INFO L512 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] [2021-10-21 19:44:03,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-21 19:44:04,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-10-21 19:44:04,002 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting sll_circular_destroyErr9ASSERT_VIOLATIONMEMORY_FREE === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-21 19:44:04,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:44:04,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1835758062, now seen corresponding path program 1 times [2021-10-21 19:44:04,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:44:04,002 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813564175] [2021-10-21 19:44:04,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:44:04,003 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:44:04,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:04,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:44:04,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:04,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:44:04,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:04,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:44:04,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:04,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-21 19:44:04,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:04,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-21 19:44:04,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:04,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-10-21 19:44:04,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:04,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-10-21 19:44:04,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:04,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-10-21 19:44:04,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:04,924 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-10-21 19:44:04,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:44:04,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813564175] [2021-10-21 19:44:04,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813564175] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:44:04,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211812763] [2021-10-21 19:44:04,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:44:04,926 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:44:04,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:44:04,927 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:44:04,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-21 19:44:06,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:06,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-21 19:44:06,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:44:06,563 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-21 19:44:06,563 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 [2021-10-21 19:44:06,742 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-10-21 19:44:06,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211812763] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:44:06,743 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:44:06,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 7] total 35 [2021-10-21 19:44:06,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718259742] [2021-10-21 19:44:06,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-21 19:44:06,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:44:06,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-21 19:44:06,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1167, Unknown=0, NotChecked=0, Total=1260 [2021-10-21 19:44:06,745 INFO L87 Difference]: Start difference. First operand 96 states and 98 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, (15), 5 states have call predecessors, (15), 6 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2021-10-21 19:44:08,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:44:08,367 INFO L93 Difference]: Finished difference Result 95 states and 97 transitions. [2021-10-21 19:44:08,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-21 19:44:08,368 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, (15), 5 states have call predecessors, (15), 6 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) Word has length 97 [2021-10-21 19:44:08,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:44:08,369 INFO L225 Difference]: With dead ends: 95 [2021-10-21 19:44:08,369 INFO L226 Difference]: Without dead ends: 95 [2021-10-21 19:44:08,369 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 1715.9ms TimeCoverageRelationStatistics Valid=284, Invalid=2686, Unknown=0, NotChecked=0, Total=2970 [2021-10-21 19:44:08,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-10-21 19:44:08,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-10-21 19:44:08,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 76 states have internal predecessors, (78), 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) [2021-10-21 19:44:08,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2021-10-21 19:44:08,372 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 97 [2021-10-21 19:44:08,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:44:08,372 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2021-10-21 19:44:08,373 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, (15), 5 states have call predecessors, (15), 6 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2021-10-21 19:44:08,373 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2021-10-21 19:44:08,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-10-21 19:44:08,373 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:44:08,373 INFO L512 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] [2021-10-21 19:44:08,402 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-10-21 19:44:08,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:44:08,574 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting mainErr1ENSURES_VIOLATIONMEMORY_LEAK === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-21 19:44:08,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:44:08,574 INFO L82 PathProgramCache]: Analyzing trace with hash -85323018, now seen corresponding path program 1 times [2021-10-21 19:44:08,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:44:08,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042125930] [2021-10-21 19:44:08,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:44:08,576 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:44:08,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:08,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:44:08,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:08,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:44:08,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:09,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:44:09,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:09,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-21 19:44:09,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:09,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-21 19:44:09,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:09,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-10-21 19:44:09,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:09,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-10-21 19:44:09,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:09,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-10-21 19:44:09,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:09,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-10-21 19:44:09,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:10,118 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-10-21 19:44:10,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:44:10,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042125930] [2021-10-21 19:44:10,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042125930] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:44:10,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385799332] [2021-10-21 19:44:10,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:44:10,119 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:44:10,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:44:10,121 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:44:10,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-21 19:44:11,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:11,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 99 conjunts are in the unsatisfiable core [2021-10-21 19:44:11,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:44:11,610 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-10-21 19:44:11,610 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 [2021-10-21 19:44:11,833 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 [2021-10-21 19:44:12,044 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-21 19:44:12,044 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 [2021-10-21 19:44:12,497 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-21 19:44:12,497 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 31 [2021-10-21 19:44:12,504 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-21 19:44:12,504 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 [2021-10-21 19:44:27,107 INFO L354 Elim1Store]: treesize reduction 74, result has 22.1 percent of original size [2021-10-21 19:44:27,107 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 5 case distinctions, treesize of input 69 treesize of output 59 [2021-10-21 19:44:27,276 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 37 treesize of output 25 [2021-10-21 19:44:27,280 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-21 19:44:27,280 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 [2021-10-21 19:44:27,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2021-10-21 19:44:27,739 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-21 19:44:27,739 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 [2021-10-21 19:44:28,159 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-21 19:44:28,159 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 [2021-10-21 19:44:28,516 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-21 19:44:28,517 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 [2021-10-21 19:44:28,521 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-21 19:44:28,521 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 [2021-10-21 19:44:53,502 INFO L354 Elim1Store]: treesize reduction 17, result has 41.4 percent of original size [2021-10-21 19:44:53,502 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 [2021-10-21 19:44:53,515 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-10-21 19:44:53,515 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 [2021-10-21 19:44:53,667 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-21 19:44:53,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385799332] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:44:53,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:44:53,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 61 [2021-10-21 19:44:53,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236255124] [2021-10-21 19:44:53,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-10-21 19:44:53,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:44:53,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-10-21 19:44:53,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=3572, Unknown=13, NotChecked=0, Total=3782 [2021-10-21 19:44:53,671 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand has 62 states, 61 states have (on average 2.2459016393442623) internal successors, (137), 52 states have internal predecessors, (137), 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) [2021-10-21 19:45:58,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:45:58,540 INFO L93 Difference]: Finished difference Result 94 states and 96 transitions. [2021-10-21 19:45:58,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-21 19:45:58,541 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 2.2459016393442623) internal successors, (137), 52 states have internal predecessors, (137), 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 [2021-10-21 19:45:58,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:45:58,541 INFO L225 Difference]: With dead ends: 94 [2021-10-21 19:45:58,541 INFO L226 Difference]: Without dead ends: 0 [2021-10-21 19:45:58,543 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 81 SyntacticMatches, 7 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1538 ImplicationChecksByTransitivity, 59038.5ms TimeCoverageRelationStatistics Valid=518, Invalid=7298, Unknown=16, NotChecked=0, Total=7832 [2021-10-21 19:45:58,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-21 19:45:58,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-21 19:45:58,544 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) [2021-10-21 19:45:58,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-21 19:45:58,544 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 101 [2021-10-21 19:45:58,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:45:58,544 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-21 19:45:58,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 2.2459016393442623) internal successors, (137), 52 states have internal predecessors, (137), 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) [2021-10-21 19:45:58,545 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-21 19:45:58,545 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-21 19:45:58,548 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr0REQUIRES_VIOLATION [2021-10-21 19:45:58,549 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr1REQUIRES_VIOLATION [2021-10-21 19:45:58,549 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr2REQUIRES_VIOLATION [2021-10-21 19:45:58,550 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr3REQUIRES_VIOLATION [2021-10-21 19:45:58,550 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONMEMORY_LEAK [2021-10-21 19:45:58,550 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1ENSURES_VIOLATIONMEMORY_LEAK [2021-10-21 19:45:58,550 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_update_atErr0REQUIRES_VIOLATION [2021-10-21 19:45:58,550 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_update_atErr1REQUIRES_VIOLATION [2021-10-21 19:45:58,551 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_update_atErr2REQUIRES_VIOLATION [2021-10-21 19:45:58,551 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_update_atErr3REQUIRES_VIOLATION [2021-10-21 19:45:58,551 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_destroyErr0REQUIRES_VIOLATION [2021-10-21 19:45:58,551 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_destroyErr1REQUIRES_VIOLATION [2021-10-21 19:45:58,552 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_destroyErr2REQUIRES_VIOLATION [2021-10-21 19:45:58,552 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_destroyErr3REQUIRES_VIOLATION [2021-10-21 19:45:58,552 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_destroyErr4ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:45:58,552 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_destroyErr5ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:45:58,553 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_destroyErr6ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:45:58,553 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_destroyErr7ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:45:58,553 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_destroyErr8ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:45:58,553 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_destroyErr9ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:45:58,554 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_createErr0REQUIRES_VIOLATION [2021-10-21 19:45:58,554 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_createErr1REQUIRES_VIOLATION [2021-10-21 19:45:58,554 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_createErr2REQUIRES_VIOLATION [2021-10-21 19:45:58,554 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_createErr3REQUIRES_VIOLATION [2021-10-21 19:45:58,554 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_get_data_atErr0REQUIRES_VIOLATION [2021-10-21 19:45:58,555 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_get_data_atErr1REQUIRES_VIOLATION [2021-10-21 19:45:58,555 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_get_data_atErr2REQUIRES_VIOLATION [2021-10-21 19:45:58,555 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_get_data_atErr3REQUIRES_VIOLATION [2021-10-21 19:45:58,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-21 19:45:58,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-10-21 19:45:58,760 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 19:45:58,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 07:45:58 BoogieIcfgContainer [2021-10-21 19:45:58,762 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 19:45:58,763 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 19:45:58,763 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 19:45:58,763 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 19:45:58,764 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:39:06" (3/4) ... [2021-10-21 19:45:58,766 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-21 19:45:58,775 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2021-10-21 19:45:58,775 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-10-21 19:45:58,775 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure myexit [2021-10-21 19:45:58,775 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure sll_circular_get_data_at [2021-10-21 19:45:58,775 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2021-10-21 19:45:58,776 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2021-10-21 19:45:58,776 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure sll_circular_create [2021-10-21 19:45:58,776 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure sll_circular_destroy [2021-10-21 19:45:58,776 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-10-21 19:45:58,777 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure sll_circular_update_at [2021-10-21 19:45:58,777 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure node_create [2021-10-21 19:45:58,784 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 24 nodes and edges [2021-10-21 19:45:58,784 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2021-10-21 19:45:58,785 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-21 19:45:58,785 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-21 19:45:58,837 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 19:45:58,837 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 19:45:58,838 INFO L168 Benchmark]: Toolchain (without parser) took 414525.73 ms. Allocated memory was 123.7 MB in the beginning and 314.6 MB in the end (delta: 190.8 MB). Free memory was 85.9 MB in the beginning and 196.9 MB in the end (delta: -111.0 MB). Peak memory consumption was 77.7 MB. Max. memory is 16.1 GB. [2021-10-21 19:45:58,839 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 123.7 MB. Free memory was 94.8 MB in the beginning and 94.8 MB in the end (delta: 29.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:45:58,839 INFO L168 Benchmark]: CACSL2BoogieTranslator took 741.97 ms. Allocated memory is still 123.7 MB. Free memory was 85.6 MB in the beginning and 90.3 MB in the end (delta: -4.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-21 19:45:58,840 INFO L168 Benchmark]: Boogie Preprocessor took 126.86 ms. Allocated memory is still 123.7 MB. Free memory was 90.3 MB in the beginning and 87.5 MB in the end (delta: 2.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-21 19:45:58,840 INFO L168 Benchmark]: RCFGBuilder took 901.13 ms. Allocated memory is still 123.7 MB. Free memory was 87.5 MB in the beginning and 63.7 MB in the end (delta: 23.8 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:45:58,840 INFO L168 Benchmark]: TraceAbstraction took 412656.14 ms. Allocated memory was 123.7 MB in the beginning and 314.6 MB in the end (delta: 190.8 MB). Free memory was 63.0 MB in the beginning and 201.4 MB in the end (delta: -138.4 MB). Peak memory consumption was 54.8 MB. Max. memory is 16.1 GB. [2021-10-21 19:45:58,841 INFO L168 Benchmark]: Witness Printer took 74.53 ms. Allocated memory is still 314.6 MB. Free memory was 201.4 MB in the beginning and 196.9 MB in the end (delta: 4.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-21 19:45:58,843 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 123.7 MB. Free memory was 94.8 MB in the beginning and 94.8 MB in the end (delta: 29.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 741.97 ms. Allocated memory is still 123.7 MB. Free memory was 85.6 MB in the beginning and 90.3 MB in the end (delta: -4.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 126.86 ms. Allocated memory is still 123.7 MB. Free memory was 90.3 MB in the beginning and 87.5 MB in the end (delta: 2.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 901.13 ms. Allocated memory is still 123.7 MB. Free memory was 87.5 MB in the beginning and 63.7 MB in the end (delta: 23.8 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 412656.14 ms. Allocated memory was 123.7 MB in the beginning and 314.6 MB in the end (delta: 190.8 MB). Free memory was 63.0 MB in the beginning and 201.4 MB in the end (delta: -138.4 MB). Peak memory consumption was 54.8 MB. Max. memory is 16.1 GB. * Witness Printer took 74.53 ms. Allocated memory is still 314.6 MB. Free memory was 201.4 MB in the beginning and 196.9 MB in the end (delta: 4.5 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, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms 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: 412576.3ms, OverallIterations: 35, TraceHistogramMax: 3, EmptinessCheckTime: 55.5ms, AutomataDifference: 223546.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 15.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2142 SDtfs, 6519 SDslu, 11319 SDs, 0 SdLazy, 40439 SolverSat, 1565 SolverUnsat, 71 SolverUnknown, 0 SolverNotchecked, 136970.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2476 GetRequests, 1270 SyntacticMatches, 38 SemanticMatches, 1168 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 10850 ImplicationChecksByTransitivity, 219965.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=148occurred in iteration=15, InterpolantAutomatonStates: 617, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 263.2ms AutomataMinimizationTime, 35 MinimizatonAttempts, 650 StatesRemovedByMinimization, 32 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 425.8ms SsaConstructionTime, 1482.1ms SatisfiabilityAnalysisTime, 172273.6ms InterpolantComputationTime, 3330 NumberOfCodeBlocks, 3320 NumberOfCodeBlocksAsserted, 55 NumberOfCheckSat, 3277 ConstructedInterpolants, 261 QuantifiedInterpolants, 35602 SizeOfPredicates, 266 NumberOfNonLiveVariables, 6475 ConjunctsInSsa, 1042 ConjunctsInUnsatCore, 53 InterpolantComputations, 18 PerfectInterpolantSequences, 782/1144 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! [2021-10-21 19:45:58,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fab3a3d6-41f9-4056-9784-2222b1da2fcf/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...