./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-simple/dll2c_update_all.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 20ed64ec Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/list-simple/dll2c_update_all.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 953c2c055895958f6a23bd6cbd577859b914649e 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Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-27 07:08:14,459 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 07:08:14,460 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 07:08:14,497 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 07:08:14,497 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 07:08:14,498 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 07:08:14,499 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 07:08:14,501 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 07:08:14,503 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 07:08:14,503 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 07:08:14,504 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 07:08:14,505 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 07:08:14,505 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 07:08:14,506 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 07:08:14,507 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 07:08:14,508 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 07:08:14,508 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 07:08:14,509 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 07:08:14,510 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 07:08:14,512 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 07:08:14,513 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 07:08:14,519 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 07:08:14,521 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 07:08:14,523 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 07:08:14,531 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 07:08:14,532 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 07:08:14,532 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 07:08:14,533 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 07:08:14,533 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 07:08:14,534 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 07:08:14,534 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 07:08:14,534 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 07:08:14,535 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 07:08:14,535 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 07:08:14,536 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 07:08:14,536 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 07:08:14,537 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 07:08:14,537 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 07:08:14,537 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 07:08:14,538 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 07:08:14,538 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 07:08:14,546 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-08-27 07:08:14,576 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 07:08:14,576 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 07:08:14,577 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 07:08:14,577 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 07:08:14,578 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 07:08:14,578 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 07:08:14,579 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 07:08:14,579 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 07:08:14,579 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-27 07:08:14,579 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 07:08:14,580 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 07:08:14,580 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-27 07:08:14,580 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 07:08:14,580 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-27 07:08:14,580 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-27 07:08:14,580 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-27 07:08:14,580 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-27 07:08:14,580 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-27 07:08:14,581 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-27 07:08:14,581 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 07:08:14,581 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 07:08:14,581 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 07:08:14,581 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-27 07:08:14,581 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 07:08:14,581 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 07:08:14,581 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-27 07:08:14,582 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-27 07:08:14,582 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-27 07:08:14,582 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 07:08:14,582 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 953c2c055895958f6a23bd6cbd577859b914649e [2021-08-27 07:08:14,845 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 07:08:14,859 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 07:08:14,861 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 07:08:14,861 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 07:08:14,862 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 07:08:14,863 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/dll2c_update_all.i [2021-08-27 07:08:14,922 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4cf9d505/0159cc5754af465fa1f130f4ac9045fa/FLAG51468339b [2021-08-27 07:08:15,336 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 07:08:15,336 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2c_update_all.i [2021-08-27 07:08:15,353 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4cf9d505/0159cc5754af465fa1f130f4ac9045fa/FLAG51468339b [2021-08-27 07:08:15,364 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4cf9d505/0159cc5754af465fa1f130f4ac9045fa [2021-08-27 07:08:15,366 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 07:08:15,368 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-27 07:08:15,369 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 07:08:15,369 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 07:08:15,372 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 07:08:15,372 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 07:08:15" (1/1) ... [2021-08-27 07:08:15,373 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f2afe07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:08:15, skipping insertion in model container [2021-08-27 07:08:15,373 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 07:08:15" (1/1) ... [2021-08-27 07:08:15,378 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 07:08:15,404 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 07:08:15,696 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2c_update_all.i[24538,24551] [2021-08-27 07:08:15,700 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 07:08:15,708 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 07:08:15,743 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2c_update_all.i[24538,24551] [2021-08-27 07:08:15,747 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 07:08:15,771 INFO L208 MainTranslator]: Completed translation [2021-08-27 07:08:15,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:08:15 WrapperNode [2021-08-27 07:08:15,772 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 07:08:15,774 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 07:08:15,774 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 07:08:15,775 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 07:08:15,783 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:08:15" (1/1) ... [2021-08-27 07:08:15,783 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:08:15" (1/1) ... [2021-08-27 07:08:15,810 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:08:15" (1/1) ... [2021-08-27 07:08:15,811 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:08:15" (1/1) ... [2021-08-27 07:08:15,822 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:08:15" (1/1) ... [2021-08-27 07:08:15,826 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:08:15" (1/1) ... [2021-08-27 07:08:15,828 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:08:15" (1/1) ... [2021-08-27 07:08:15,832 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 07:08:15,833 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 07:08:15,833 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 07:08:15,833 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 07:08:15,834 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:08:15" (1/1) ... [2021-08-27 07:08:15,838 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 07:08:15,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:08:15,851 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-27 07:08:15,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-27 07:08:15,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-27 07:08:15,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 07:08:15,891 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-08-27 07:08:15,891 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-08-27 07:08:15,892 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-08-27 07:08:15,892 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-08-27 07:08:15,892 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-08-27 07:08:15,892 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_create [2021-08-27 07:08:15,892 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_destroy [2021-08-27 07:08:15,892 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_get_data_at [2021-08-27 07:08:15,892 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_update_at [2021-08-27 07:08:15,892 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-27 07:08:15,893 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-08-27 07:08:15,893 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-08-27 07:08:15,893 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-08-27 07:08:15,893 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-08-27 07:08:15,893 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-08-27 07:08:15,893 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-27 07:08:15,893 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-08-27 07:08:15,893 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-08-27 07:08:15,894 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-08-27 07:08:15,894 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-08-27 07:08:15,894 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-08-27 07:08:15,894 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-08-27 07:08:15,894 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-08-27 07:08:15,894 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-08-27 07:08:15,894 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-08-27 07:08:15,894 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-08-27 07:08:15,894 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-08-27 07:08:15,895 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-08-27 07:08:15,895 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-08-27 07:08:15,895 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-08-27 07:08:15,895 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-08-27 07:08:15,895 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-08-27 07:08:15,895 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-08-27 07:08:15,895 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-08-27 07:08:15,895 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-08-27 07:08:15,895 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-08-27 07:08:15,896 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-08-27 07:08:15,896 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-08-27 07:08:15,896 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-08-27 07:08:15,896 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-08-27 07:08:15,896 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-08-27 07:08:15,896 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-08-27 07:08:15,906 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-08-27 07:08:15,906 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-08-27 07:08:15,906 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-08-27 07:08:15,906 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-08-27 07:08:15,906 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-08-27 07:08:15,906 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-08-27 07:08:15,906 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-08-27 07:08:15,907 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-08-27 07:08:15,907 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-08-27 07:08:15,907 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-08-27 07:08:15,907 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-08-27 07:08:15,907 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-08-27 07:08:15,907 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-08-27 07:08:15,907 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-08-27 07:08:15,907 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-08-27 07:08:15,907 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-08-27 07:08:15,908 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-08-27 07:08:15,908 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-08-27 07:08:15,908 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-08-27 07:08:15,908 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-08-27 07:08:15,908 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-08-27 07:08:15,908 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-08-27 07:08:15,908 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-08-27 07:08:15,908 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-08-27 07:08:15,909 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-08-27 07:08:15,909 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-08-27 07:08:15,909 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-08-27 07:08:15,909 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-08-27 07:08:15,909 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-08-27 07:08:15,909 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-08-27 07:08:15,909 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-08-27 07:08:15,909 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-08-27 07:08:15,909 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-08-27 07:08:15,910 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-08-27 07:08:15,910 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-08-27 07:08:15,910 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-08-27 07:08:15,910 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-08-27 07:08:15,910 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-08-27 07:08:15,910 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-08-27 07:08:15,910 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-08-27 07:08:15,910 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-08-27 07:08:15,910 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-08-27 07:08:15,911 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-08-27 07:08:15,911 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-08-27 07:08:15,911 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-08-27 07:08:15,911 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-08-27 07:08:15,911 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-08-27 07:08:15,911 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-08-27 07:08:15,911 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-08-27 07:08:15,911 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-08-27 07:08:15,911 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-08-27 07:08:15,912 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-08-27 07:08:15,912 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-08-27 07:08:15,912 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-08-27 07:08:15,912 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-08-27 07:08:15,912 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-08-27 07:08:15,912 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-08-27 07:08:15,912 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-08-27 07:08:15,912 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-08-27 07:08:15,912 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-08-27 07:08:15,913 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-08-27 07:08:15,913 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-08-27 07:08:15,913 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-08-27 07:08:15,913 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-08-27 07:08:15,913 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-08-27 07:08:15,913 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-08-27 07:08:15,913 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-08-27 07:08:15,913 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-08-27 07:08:15,913 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-08-27 07:08:15,914 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-08-27 07:08:15,914 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-08-27 07:08:15,914 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-08-27 07:08:15,914 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-08-27 07:08:15,914 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-08-27 07:08:15,914 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-08-27 07:08:15,914 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-08-27 07:08:15,914 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-08-27 07:08:15,914 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-08-27 07:08:15,915 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-08-27 07:08:15,915 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-08-27 07:08:15,915 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-27 07:08:15,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-08-27 07:08:15,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-27 07:08:15,915 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_create [2021-08-27 07:08:15,915 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_destroy [2021-08-27 07:08:15,915 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-08-27 07:08:15,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-27 07:08:15,916 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_get_data_at [2021-08-27 07:08:15,916 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-27 07:08:15,916 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_update_at [2021-08-27 07:08:15,916 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-27 07:08:15,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-27 07:08:15,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-27 07:08:15,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 07:08:16,330 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-08-27 07:08:16,413 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 07:08:16,414 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-08-27 07:08:16,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 07:08:16 BoogieIcfgContainer [2021-08-27 07:08:16,418 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 07:08:16,419 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-27 07:08:16,419 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-27 07:08:16,421 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-27 07:08:16,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 07:08:15" (1/3) ... [2021-08-27 07:08:16,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ea2fd24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 07:08:16, skipping insertion in model container [2021-08-27 07:08:16,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:08:15" (2/3) ... [2021-08-27 07:08:16,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ea2fd24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 07:08:16, skipping insertion in model container [2021-08-27 07:08:16,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 07:08:16" (3/3) ... [2021-08-27 07:08:16,423 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2c_update_all.i [2021-08-27 07:08:16,426 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-27 07:08:16,427 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2021-08-27 07:08:16,452 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-27 07:08:16,456 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, mConcurrency=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 [2021-08-27 07:08:16,456 INFO L340 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2021-08-27 07:08:16,470 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 63 states have (on average 1.7936507936507937) internal successors, (113), 97 states have internal predecessors, (113), 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) [2021-08-27 07:08:16,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-27 07:08:16,475 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:08:16,476 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:08:16,476 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-08-27 07:08:16,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:08:16,480 INFO L82 PathProgramCache]: Analyzing trace with hash 128365921, now seen corresponding path program 1 times [2021-08-27 07:08:16,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:08:16,486 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749233368] [2021-08-27 07:08:16,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:08:16,486 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:08:16,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:16,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:08:16,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:16,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:08:16,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:08:16,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749233368] [2021-08-27 07:08:16,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749233368] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:08:16,687 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:08:16,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 07:08:16,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119933026] [2021-08-27 07:08:16,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 07:08:16,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:08:16,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 07:08:16,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 07:08:16,703 INFO L87 Difference]: Start difference. First operand has 114 states, 63 states have (on average 1.7936507936507937) internal successors, (113), 97 states have internal predecessors, (113), 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) [2021-08-27 07:08:16,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:08:16,938 INFO L93 Difference]: Finished difference Result 130 states and 140 transitions. [2021-08-27 07:08:16,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 07:08:16,939 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 [2021-08-27 07:08:16,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:08:16,947 INFO L225 Difference]: With dead ends: 130 [2021-08-27 07:08:16,947 INFO L226 Difference]: Without dead ends: 124 [2021-08-27 07:08:16,948 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 07:08:16,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-08-27 07:08:16,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 105. [2021-08-27 07:08:16,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 60 states have (on average 1.6333333333333333) internal successors, (98), 90 states have internal predecessors, (98), 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) [2021-08-27 07:08:16,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 113 transitions. [2021-08-27 07:08:16,977 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 113 transitions. Word has length 12 [2021-08-27 07:08:16,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:08:16,977 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 113 transitions. [2021-08-27 07:08:16,977 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) [2021-08-27 07:08:16,977 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 113 transitions. [2021-08-27 07:08:16,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-27 07:08:16,978 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:08:16,978 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:08:16,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-27 07:08:16,978 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-08-27 07:08:16,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:08:16,978 INFO L82 PathProgramCache]: Analyzing trace with hash 128365922, now seen corresponding path program 1 times [2021-08-27 07:08:16,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:08:16,979 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575919775] [2021-08-27 07:08:16,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:08:16,979 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:08:16,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:17,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:08:17,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:17,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:08:17,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:08:17,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575919775] [2021-08-27 07:08:17,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575919775] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:08:17,028 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:08:17,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 07:08:17,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651931518] [2021-08-27 07:08:17,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 07:08:17,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:08:17,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 07:08:17,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 07:08:17,029 INFO L87 Difference]: Start difference. First operand 105 states and 113 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) [2021-08-27 07:08:17,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:08:17,212 INFO L93 Difference]: Finished difference Result 121 states and 130 transitions. [2021-08-27 07:08:17,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 07:08:17,212 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 [2021-08-27 07:08:17,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:08:17,213 INFO L225 Difference]: With dead ends: 121 [2021-08-27 07:08:17,213 INFO L226 Difference]: Without dead ends: 121 [2021-08-27 07:08:17,213 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 07:08:17,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-08-27 07:08:17,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 102. [2021-08-27 07:08:17,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 60 states have (on average 1.5833333333333333) internal successors, (95), 87 states have internal predecessors, (95), 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) [2021-08-27 07:08:17,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 110 transitions. [2021-08-27 07:08:17,218 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 110 transitions. Word has length 12 [2021-08-27 07:08:17,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:08:17,219 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 110 transitions. [2021-08-27 07:08:17,219 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) [2021-08-27 07:08:17,219 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 110 transitions. [2021-08-27 07:08:17,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-27 07:08:17,219 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:08:17,219 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:08:17,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-27 07:08:17,219 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting dll_circular_createErr4REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-08-27 07:08:17,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:08:17,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1287918133, now seen corresponding path program 1 times [2021-08-27 07:08:17,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:08:17,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367261147] [2021-08-27 07:08:17,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:08:17,220 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:08:17,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:17,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:08:17,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:17,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-08-27 07:08:17,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:17,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:08:17,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:08:17,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367261147] [2021-08-27 07:08:17,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367261147] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:08:17,316 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:08:17,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-27 07:08:17,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970140873] [2021-08-27 07:08:17,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 07:08:17,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:08:17,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 07:08:17,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-27 07:08:17,317 INFO L87 Difference]: Start difference. First operand 102 states and 110 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 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) [2021-08-27 07:08:17,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:08:17,678 INFO L93 Difference]: Finished difference Result 132 states and 143 transitions. [2021-08-27 07:08:17,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-27 07:08:17,678 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 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 20 [2021-08-27 07:08:17,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:08:17,679 INFO L225 Difference]: With dead ends: 132 [2021-08-27 07:08:17,679 INFO L226 Difference]: Without dead ends: 132 [2021-08-27 07:08:17,680 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 129.2ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-08-27 07:08:17,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-08-27 07:08:17,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 103. [2021-08-27 07:08:17,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 61 states have (on average 1.5737704918032787) internal successors, (96), 88 states have internal predecessors, (96), 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) [2021-08-27 07:08:17,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 111 transitions. [2021-08-27 07:08:17,685 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 111 transitions. Word has length 20 [2021-08-27 07:08:17,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:08:17,686 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 111 transitions. [2021-08-27 07:08:17,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 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) [2021-08-27 07:08:17,686 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 111 transitions. [2021-08-27 07:08:17,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-27 07:08:17,687 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:08:17,687 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:08:17,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-27 07:08:17,687 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting dll_circular_createErr0REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-08-27 07:08:17,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:08:17,688 INFO L82 PathProgramCache]: Analyzing trace with hash 60501513, now seen corresponding path program 1 times [2021-08-27 07:08:17,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:08:17,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764711407] [2021-08-27 07:08:17,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:08:17,688 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:08:17,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:17,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:08:17,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:17,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-08-27 07:08:17,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:17,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-08-27 07:08:17,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:17,791 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-27 07:08:17,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:08:17,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764711407] [2021-08-27 07:08:17,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764711407] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:08:17,792 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:08:17,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-27 07:08:17,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447626054] [2021-08-27 07:08:17,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-27 07:08:17,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:08:17,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 07:08:17,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-27 07:08:17,793 INFO L87 Difference]: Start difference. First operand 103 states and 111 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) [2021-08-27 07:08:18,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:08:18,098 INFO L93 Difference]: Finished difference Result 122 states and 132 transitions. [2021-08-27 07:08:18,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-27 07:08:18,099 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 30 [2021-08-27 07:08:18,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:08:18,100 INFO L225 Difference]: With dead ends: 122 [2021-08-27 07:08:18,100 INFO L226 Difference]: Without dead ends: 122 [2021-08-27 07:08:18,100 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 68.0ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-27 07:08:18,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-08-27 07:08:18,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 102. [2021-08-27 07:08:18,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 61 states have (on average 1.5573770491803278) internal successors, (95), 87 states have internal predecessors, (95), 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) [2021-08-27 07:08:18,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 110 transitions. [2021-08-27 07:08:18,104 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 110 transitions. Word has length 30 [2021-08-27 07:08:18,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:08:18,105 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 110 transitions. [2021-08-27 07:08:18,105 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) [2021-08-27 07:08:18,105 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 110 transitions. [2021-08-27 07:08:18,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-27 07:08:18,106 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:08:18,106 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:08:18,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-27 07:08:18,106 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting dll_circular_createErr1REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-08-27 07:08:18,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:08:18,106 INFO L82 PathProgramCache]: Analyzing trace with hash 60501514, now seen corresponding path program 1 times [2021-08-27 07:08:18,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:08:18,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589693613] [2021-08-27 07:08:18,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:08:18,107 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:08:18,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:18,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:08:18,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:18,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-08-27 07:08:18,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:18,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-08-27 07:08:18,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:18,221 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 07:08:18,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:08:18,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589693613] [2021-08-27 07:08:18,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589693613] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:08:18,221 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:08:18,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-27 07:08:18,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896065061] [2021-08-27 07:08:18,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-27 07:08:18,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:08:18,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 07:08:18,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-27 07:08:18,223 INFO L87 Difference]: Start difference. First operand 102 states and 110 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 5 states have internal predecessors, (22), 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) [2021-08-27 07:08:18,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:08:18,533 INFO L93 Difference]: Finished difference Result 121 states and 131 transitions. [2021-08-27 07:08:18,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-27 07:08:18,533 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 5 states have internal predecessors, (22), 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 30 [2021-08-27 07:08:18,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:08:18,534 INFO L225 Difference]: With dead ends: 121 [2021-08-27 07:08:18,534 INFO L226 Difference]: Without dead ends: 121 [2021-08-27 07:08:18,535 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 71.4ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-27 07:08:18,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-08-27 07:08:18,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 101. [2021-08-27 07:08:18,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 61 states have (on average 1.540983606557377) internal successors, (94), 86 states have internal predecessors, (94), 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) [2021-08-27 07:08:18,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 109 transitions. [2021-08-27 07:08:18,538 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 109 transitions. Word has length 30 [2021-08-27 07:08:18,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:08:18,539 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 109 transitions. [2021-08-27 07:08:18,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 5 states have internal predecessors, (22), 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) [2021-08-27 07:08:18,539 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 109 transitions. [2021-08-27 07:08:18,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-27 07:08:18,540 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:08:18,540 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:08:18,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-27 07:08:18,540 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting dll_circular_createErr2REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-08-27 07:08:18,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:08:18,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1987588278, now seen corresponding path program 1 times [2021-08-27 07:08:18,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:08:18,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783505862] [2021-08-27 07:08:18,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:08:18,541 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:08:18,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:18,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:08:18,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:18,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-08-27 07:08:18,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:18,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-08-27 07:08:18,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:18,685 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 07:08:18,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:08:18,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783505862] [2021-08-27 07:08:18,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783505862] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:08:18,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818765284] [2021-08-27 07:08:18,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:08:18,686 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:08:18,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:08:18,725 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 07:08:18,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-27 07:08:18,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:18,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-27 07:08:18,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:08:18,940 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 [2021-08-27 07:08:19,100 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-27 07:08:19,100 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 [2021-08-27 07:08:19,183 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:08:19,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818765284] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:08:19,184 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 07:08:19,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-08-27 07:08:19,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601523224] [2021-08-27 07:08:19,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-27 07:08:19,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:08:19,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-27 07:08:19,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-08-27 07:08:19,185 INFO L87 Difference]: Start difference. First operand 101 states and 109 transitions. Second operand has 14 states, 13 states have (on average 3.0) internal successors, (39), 10 states have internal predecessors, (39), 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) [2021-08-27 07:08:19,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:08:19,642 INFO L93 Difference]: Finished difference Result 128 states and 139 transitions. [2021-08-27 07:08:19,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-27 07:08:19,642 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.0) internal successors, (39), 10 states have internal predecessors, (39), 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 32 [2021-08-27 07:08:19,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:08:19,643 INFO L225 Difference]: With dead ends: 128 [2021-08-27 07:08:19,643 INFO L226 Difference]: Without dead ends: 128 [2021-08-27 07:08:19,656 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 165.7ms TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-08-27 07:08:19,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-08-27 07:08:19,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 106. [2021-08-27 07:08:19,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 65 states have (on average 1.5384615384615385) internal successors, (100), 90 states have internal predecessors, (100), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-08-27 07:08:19,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 117 transitions. [2021-08-27 07:08:19,660 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 117 transitions. Word has length 32 [2021-08-27 07:08:19,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:08:19,660 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 117 transitions. [2021-08-27 07:08:19,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.0) internal successors, (39), 10 states have internal predecessors, (39), 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) [2021-08-27 07:08:19,660 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 117 transitions. [2021-08-27 07:08:19,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-27 07:08:19,660 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:08:19,660 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:08:19,679 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-27 07:08:19,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-08-27 07:08:19,861 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting dll_circular_createErr3REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-08-27 07:08:19,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:08:19,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1987588277, now seen corresponding path program 1 times [2021-08-27 07:08:19,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:08:19,862 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026472626] [2021-08-27 07:08:19,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:08:19,862 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:08:19,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:19,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:08:19,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:19,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-08-27 07:08:19,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:20,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-08-27 07:08:20,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:20,068 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 07:08:20,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:08:20,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026472626] [2021-08-27 07:08:20,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026472626] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:08:20,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179029204] [2021-08-27 07:08:20,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:08:20,068 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:08:20,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:08:20,080 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 07:08:20,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-27 07:08:20,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:20,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-27 07:08:20,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:08:20,246 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 [2021-08-27 07:08:20,502 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-27 07:08:20,503 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 [2021-08-27 07:08:20,508 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 07:08:20,508 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 [2021-08-27 07:08:20,579 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:08:20,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179029204] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:08:20,579 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 07:08:20,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2021-08-27 07:08:20,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079800575] [2021-08-27 07:08:20,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-27 07:08:20,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:08:20,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-27 07:08:20,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-08-27 07:08:20,580 INFO L87 Difference]: Start difference. First operand 106 states and 117 transitions. Second operand has 20 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 15 states have internal predecessors, (45), 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) [2021-08-27 07:08:21,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:08:21,267 INFO L93 Difference]: Finished difference Result 127 states and 138 transitions. [2021-08-27 07:08:21,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-27 07:08:21,268 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 15 states have internal predecessors, (45), 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 32 [2021-08-27 07:08:21,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:08:21,269 INFO L225 Difference]: With dead ends: 127 [2021-08-27 07:08:21,269 INFO L226 Difference]: Without dead ends: 127 [2021-08-27 07:08:21,270 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 313.7ms TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2021-08-27 07:08:21,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-08-27 07:08:21,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 106. [2021-08-27 07:08:21,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 65 states have (on average 1.523076923076923) internal successors, (99), 90 states have internal predecessors, (99), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-08-27 07:08:21,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 116 transitions. [2021-08-27 07:08:21,279 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 116 transitions. Word has length 32 [2021-08-27 07:08:21,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:08:21,279 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 116 transitions. [2021-08-27 07:08:21,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 15 states have internal predecessors, (45), 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) [2021-08-27 07:08:21,280 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 116 transitions. [2021-08-27 07:08:21,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-27 07:08:21,281 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:08:21,281 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:08:21,305 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-08-27 07:08:21,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-08-27 07:08:21,492 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting dll_circular_createErr4REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-08-27 07:08:21,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:08:21,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1188265856, now seen corresponding path program 1 times [2021-08-27 07:08:21,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:08:21,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198329540] [2021-08-27 07:08:21,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:08:21,493 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:08:21,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:21,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:08:21,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:21,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-08-27 07:08:21,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:21,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-08-27 07:08:21,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:21,566 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 07:08:21,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:08:21,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198329540] [2021-08-27 07:08:21,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198329540] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:08:21,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563078820] [2021-08-27 07:08:21,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:08:21,567 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:08:21,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:08:21,568 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 07:08:21,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-27 07:08:21,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:21,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-27 07:08:21,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:08:21,817 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 07:08:21,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563078820] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:08:21,818 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 07:08:21,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 8 [2021-08-27 07:08:21,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412299804] [2021-08-27 07:08:21,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-27 07:08:21,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:08:21,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 07:08:21,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-27 07:08:21,819 INFO L87 Difference]: Start difference. First operand 106 states and 116 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-27 07:08:22,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:08:22,096 INFO L93 Difference]: Finished difference Result 126 states and 136 transitions. [2021-08-27 07:08:22,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-27 07:08:22,097 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2021-08-27 07:08:22,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:08:22,098 INFO L225 Difference]: With dead ends: 126 [2021-08-27 07:08:22,098 INFO L226 Difference]: Without dead ends: 126 [2021-08-27 07:08:22,098 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 56.9ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-27 07:08:22,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-08-27 07:08:22,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 106. [2021-08-27 07:08:22,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 65 states have (on average 1.5076923076923077) internal successors, (98), 90 states have internal predecessors, (98), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-08-27 07:08:22,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 115 transitions. [2021-08-27 07:08:22,100 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 115 transitions. Word has length 34 [2021-08-27 07:08:22,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:08:22,101 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 115 transitions. [2021-08-27 07:08:22,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-27 07:08:22,101 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 115 transitions. [2021-08-27 07:08:22,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-27 07:08:22,101 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:08:22,102 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:08:22,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-27 07:08:22,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:08:22,320 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting dll_circular_createErr4REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-08-27 07:08:22,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:08:22,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1823244786, now seen corresponding path program 1 times [2021-08-27 07:08:22,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:08:22,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890716144] [2021-08-27 07:08:22,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:08:22,321 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:08:22,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:22,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:08:22,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:22,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-08-27 07:08:22,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:22,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-08-27 07:08:22,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:22,394 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-27 07:08:22,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:08:22,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890716144] [2021-08-27 07:08:22,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890716144] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:08:22,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075680866] [2021-08-27 07:08:22,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:08:22,395 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:08:22,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:08:22,409 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 07:08:22,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-27 07:08:22,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:22,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-27 07:08:22,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:08:22,700 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-27 07:08:22,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075680866] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:08:22,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 07:08:22,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 6 [2021-08-27 07:08:22,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096468255] [2021-08-27 07:08:22,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 07:08:22,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:08:22,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 07:08:22,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-27 07:08:22,702 INFO L87 Difference]: Start difference. First operand 106 states and 115 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-08-27 07:08:22,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:08:22,951 INFO L93 Difference]: Finished difference Result 130 states and 142 transitions. [2021-08-27 07:08:22,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-27 07:08:22,951 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2021-08-27 07:08:22,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:08:22,952 INFO L225 Difference]: With dead ends: 130 [2021-08-27 07:08:22,952 INFO L226 Difference]: Without dead ends: 130 [2021-08-27 07:08:22,952 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 52.2ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-08-27 07:08:22,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-08-27 07:08:22,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 109. [2021-08-27 07:08:22,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 68 states have (on average 1.5147058823529411) internal successors, (103), 93 states have internal predecessors, (103), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-08-27 07:08:22,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 120 transitions. [2021-08-27 07:08:22,956 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 120 transitions. Word has length 35 [2021-08-27 07:08:22,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:08:22,956 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 120 transitions. [2021-08-27 07:08:22,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-08-27 07:08:22,956 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 120 transitions. [2021-08-27 07:08:22,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-27 07:08:22,957 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:08:22,957 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:08:22,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-27 07:08:23,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:08:23,175 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting dll_circular_createErr5REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-08-27 07:08:23,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:08:23,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1823244785, now seen corresponding path program 1 times [2021-08-27 07:08:23,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:08:23,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404464564] [2021-08-27 07:08:23,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:08:23,175 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:08:23,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:23,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:08:23,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:23,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-08-27 07:08:23,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:23,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-08-27 07:08:23,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:23,320 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 07:08:23,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:08:23,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404464564] [2021-08-27 07:08:23,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404464564] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:08:23,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485902497] [2021-08-27 07:08:23,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:08:23,320 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:08:23,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:08:23,337 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 07:08:23,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-27 07:08:23,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:23,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-27 07:08:23,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:08:23,759 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 07:08:23,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485902497] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:08:23,760 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 07:08:23,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 14 [2021-08-27 07:08:23,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559668396] [2021-08-27 07:08:23,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-27 07:08:23,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:08:23,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-27 07:08:23,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-08-27 07:08:23,761 INFO L87 Difference]: Start difference. First operand 109 states and 120 transitions. Second operand has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 11 states have internal predecessors, (45), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-08-27 07:08:24,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:08:24,189 INFO L93 Difference]: Finished difference Result 135 states and 147 transitions. [2021-08-27 07:08:24,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-27 07:08:24,189 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 11 states have internal predecessors, (45), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 35 [2021-08-27 07:08:24,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:08:24,190 INFO L225 Difference]: With dead ends: 135 [2021-08-27 07:08:24,190 INFO L226 Difference]: Without dead ends: 135 [2021-08-27 07:08:24,190 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 151.4ms TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-08-27 07:08:24,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-08-27 07:08:24,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 109. [2021-08-27 07:08:24,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 68 states have (on average 1.5) internal successors, (102), 93 states have internal predecessors, (102), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-08-27 07:08:24,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 119 transitions. [2021-08-27 07:08:24,193 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 119 transitions. Word has length 35 [2021-08-27 07:08:24,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:08:24,193 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 119 transitions. [2021-08-27 07:08:24,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 11 states have internal predecessors, (45), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-08-27 07:08:24,193 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 119 transitions. [2021-08-27 07:08:24,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-27 07:08:24,193 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:08:24,193 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:08:24,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-27 07:08:24,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-27 07:08:24,411 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting dll_circular_createErr6REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-08-27 07:08:24,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:08:24,412 INFO L82 PathProgramCache]: Analyzing trace with hash -686013508, now seen corresponding path program 1 times [2021-08-27 07:08:24,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:08:24,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361086555] [2021-08-27 07:08:24,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:08:24,412 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:08:24,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:24,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:08:24,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:24,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-08-27 07:08:24,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:24,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-08-27 07:08:24,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:24,529 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-27 07:08:24,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:08:24,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361086555] [2021-08-27 07:08:24,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361086555] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:08:24,529 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:08:24,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-27 07:08:24,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350557656] [2021-08-27 07:08:24,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-27 07:08:24,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:08:24,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-27 07:08:24,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-27 07:08:24,530 INFO L87 Difference]: Start difference. First operand 109 states and 119 transitions. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 6 states have internal predecessors, (26), 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) [2021-08-27 07:08:24,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:08:24,848 INFO L93 Difference]: Finished difference Result 128 states and 139 transitions. [2021-08-27 07:08:24,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-27 07:08:24,849 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 6 states have internal predecessors, (26), 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 36 [2021-08-27 07:08:24,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:08:24,849 INFO L225 Difference]: With dead ends: 128 [2021-08-27 07:08:24,849 INFO L226 Difference]: Without dead ends: 128 [2021-08-27 07:08:24,849 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 77.4ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-08-27 07:08:24,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-08-27 07:08:24,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 108. [2021-08-27 07:08:24,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 68 states have (on average 1.4852941176470589) internal successors, (101), 92 states have internal predecessors, (101), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-08-27 07:08:24,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 118 transitions. [2021-08-27 07:08:24,852 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 118 transitions. Word has length 36 [2021-08-27 07:08:24,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:08:24,852 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 118 transitions. [2021-08-27 07:08:24,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 6 states have internal predecessors, (26), 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) [2021-08-27 07:08:24,852 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 118 transitions. [2021-08-27 07:08:24,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-27 07:08:24,852 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:08:24,852 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:08:24,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-27 07:08:24,852 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting dll_circular_createErr7REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-08-27 07:08:24,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:08:24,853 INFO L82 PathProgramCache]: Analyzing trace with hash -686013507, now seen corresponding path program 1 times [2021-08-27 07:08:24,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:08:24,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244016599] [2021-08-27 07:08:24,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:08:24,853 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:08:24,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:24,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:08:24,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:24,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-08-27 07:08:24,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:24,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-08-27 07:08:24,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:24,961 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 07:08:24,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:08:24,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244016599] [2021-08-27 07:08:24,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244016599] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:08:24,962 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:08:24,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-27 07:08:24,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563315114] [2021-08-27 07:08:24,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-27 07:08:24,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:08:24,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-27 07:08:24,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-27 07:08:24,963 INFO L87 Difference]: Start difference. First operand 108 states and 118 transitions. Second operand has 9 states, 8 states have (on average 3.5) internal successors, (28), 6 states have internal predecessors, (28), 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) [2021-08-27 07:08:25,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:08:25,312 INFO L93 Difference]: Finished difference Result 126 states and 137 transitions. [2021-08-27 07:08:25,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-27 07:08:25,313 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 6 states have internal predecessors, (28), 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 36 [2021-08-27 07:08:25,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:08:25,314 INFO L225 Difference]: With dead ends: 126 [2021-08-27 07:08:25,314 INFO L226 Difference]: Without dead ends: 126 [2021-08-27 07:08:25,314 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 87.7ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-08-27 07:08:25,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-08-27 07:08:25,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 107. [2021-08-27 07:08:25,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 68 states have (on average 1.4705882352941178) internal successors, (100), 91 states have internal predecessors, (100), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-08-27 07:08:25,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 117 transitions. [2021-08-27 07:08:25,316 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 117 transitions. Word has length 36 [2021-08-27 07:08:25,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:08:25,316 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 117 transitions. [2021-08-27 07:08:25,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 6 states have internal predecessors, (28), 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) [2021-08-27 07:08:25,316 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 117 transitions. [2021-08-27 07:08:25,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-27 07:08:25,317 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:08:25,317 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:08:25,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-27 07:08:25,317 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting dll_circular_update_atErr3REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-08-27 07:08:25,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:08:25,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1949112644, now seen corresponding path program 1 times [2021-08-27 07:08:25,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:08:25,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817288043] [2021-08-27 07:08:25,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:08:25,317 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:08:25,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:25,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:08:25,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:25,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:08:25,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:25,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-08-27 07:08:25,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:25,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 07:08:25,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:25,527 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 07:08:25,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:08:25,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817288043] [2021-08-27 07:08:25,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817288043] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:08:25,528 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:08:25,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-08-27 07:08:25,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679480923] [2021-08-27 07:08:25,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-27 07:08:25,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:08:25,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-27 07:08:25,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-08-27 07:08:25,529 INFO L87 Difference]: Start difference. First operand 107 states and 117 transitions. Second operand has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 9 states have internal predecessors, (35), 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) [2021-08-27 07:08:26,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:08:26,180 INFO L93 Difference]: Finished difference Result 134 states and 146 transitions. [2021-08-27 07:08:26,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-27 07:08:26,181 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 9 states have internal predecessors, (35), 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 45 [2021-08-27 07:08:26,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:08:26,182 INFO L225 Difference]: With dead ends: 134 [2021-08-27 07:08:26,182 INFO L226 Difference]: Without dead ends: 134 [2021-08-27 07:08:26,182 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 274.5ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-08-27 07:08:26,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-08-27 07:08:26,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 110. [2021-08-27 07:08:26,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 71 states have (on average 1.4929577464788732) internal successors, (106), 94 states have internal predecessors, (106), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-08-27 07:08:26,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 123 transitions. [2021-08-27 07:08:26,184 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 123 transitions. Word has length 45 [2021-08-27 07:08:26,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:08:26,185 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 123 transitions. [2021-08-27 07:08:26,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 9 states have internal predecessors, (35), 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) [2021-08-27 07:08:26,185 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 123 transitions. [2021-08-27 07:08:26,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-27 07:08:26,185 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:08:26,185 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:08:26,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-27 07:08:26,186 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting dll_circular_update_atErr2REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-08-27 07:08:26,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:08:26,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1949112643, now seen corresponding path program 1 times [2021-08-27 07:08:26,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:08:26,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892066234] [2021-08-27 07:08:26,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:08:26,186 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:08:26,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:26,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:08:26,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:26,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:08:26,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:26,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-08-27 07:08:26,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:26,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 07:08:26,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:26,332 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-27 07:08:26,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:08:26,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892066234] [2021-08-27 07:08:26,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892066234] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:08:26,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:08:26,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-08-27 07:08:26,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773014609] [2021-08-27 07:08:26,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-27 07:08:26,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:08:26,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-27 07:08:26,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-08-27 07:08:26,333 INFO L87 Difference]: Start difference. First operand 110 states and 123 transitions. Second operand has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 9 states have internal predecessors, (33), 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) [2021-08-27 07:08:26,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:08:26,816 INFO L93 Difference]: Finished difference Result 133 states and 144 transitions. [2021-08-27 07:08:26,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-27 07:08:26,816 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 9 states have internal predecessors, (33), 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 45 [2021-08-27 07:08:26,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:08:26,817 INFO L225 Difference]: With dead ends: 133 [2021-08-27 07:08:26,817 INFO L226 Difference]: Without dead ends: 133 [2021-08-27 07:08:26,817 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 167.9ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-08-27 07:08:26,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-08-27 07:08:26,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 110. [2021-08-27 07:08:26,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 71 states have (on average 1.4647887323943662) internal successors, (104), 94 states have internal predecessors, (104), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-08-27 07:08:26,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2021-08-27 07:08:26,819 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 45 [2021-08-27 07:08:26,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:08:26,820 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2021-08-27 07:08:26,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 9 states have internal predecessors, (33), 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) [2021-08-27 07:08:26,820 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2021-08-27 07:08:26,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-27 07:08:26,820 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:08:26,820 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:08:26,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-08-27 07:08:26,820 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting dll_circular_destroyErr0REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-08-27 07:08:26,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:08:26,821 INFO L82 PathProgramCache]: Analyzing trace with hash 812961645, now seen corresponding path program 1 times [2021-08-27 07:08:26,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:08:26,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072337546] [2021-08-27 07:08:26,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:08:26,821 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:08:26,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:26,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:08:26,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:26,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:08:26,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:26,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-08-27 07:08:26,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:26,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 07:08:26,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:26,900 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-27 07:08:26,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:08:26,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072337546] [2021-08-27 07:08:26,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072337546] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:08:26,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:08:26,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-27 07:08:26,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431863940] [2021-08-27 07:08:26,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 07:08:26,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:08:26,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 07:08:26,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-27 07:08:26,902 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 4 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) [2021-08-27 07:08:27,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:08:27,088 INFO L93 Difference]: Finished difference Result 139 states and 153 transitions. [2021-08-27 07:08:27,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 07:08:27,088 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 4 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 47 [2021-08-27 07:08:27,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:08:27,089 INFO L225 Difference]: With dead ends: 139 [2021-08-27 07:08:27,089 INFO L226 Difference]: Without dead ends: 139 [2021-08-27 07:08:27,089 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 63.7ms TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-08-27 07:08:27,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-08-27 07:08:27,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 112. [2021-08-27 07:08:27,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 73 states have (on average 1.452054794520548) internal successors, (106), 96 states have internal predecessors, (106), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-08-27 07:08:27,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 123 transitions. [2021-08-27 07:08:27,091 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 123 transitions. Word has length 47 [2021-08-27 07:08:27,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:08:27,091 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 123 transitions. [2021-08-27 07:08:27,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 4 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) [2021-08-27 07:08:27,091 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 123 transitions. [2021-08-27 07:08:27,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-27 07:08:27,092 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:08:27,092 INFO L512 BasicCegarLoop]: trace histogram [3, 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] [2021-08-27 07:08:27,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-08-27 07:08:27,092 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting dll_circular_createErr2REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-08-27 07:08:27,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:08:27,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1650408867, now seen corresponding path program 1 times [2021-08-27 07:08:27,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:08:27,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366792516] [2021-08-27 07:08:27,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:08:27,092 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:08:27,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:27,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:08:27,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:27,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-08-27 07:08:27,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:27,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-08-27 07:08:27,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:27,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-08-27 07:08:27,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:27,164 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-08-27 07:08:27,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:08:27,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366792516] [2021-08-27 07:08:27,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366792516] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:08:27,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623395030] [2021-08-27 07:08:27,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:08:27,164 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:08:27,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:08:27,185 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 07:08:27,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-27 07:08:27,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:27,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-27 07:08:27,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:08:27,547 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-27 07:08:27,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623395030] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:08:27,548 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-27 07:08:27,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2021-08-27 07:08:27,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897890285] [2021-08-27 07:08:27,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 07:08:27,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:08:27,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 07:08:27,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-08-27 07:08:27,549 INFO L87 Difference]: Start difference. First operand 112 states and 123 transitions. Second operand has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-08-27 07:08:27,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:08:27,578 INFO L93 Difference]: Finished difference Result 100 states and 107 transitions. [2021-08-27 07:08:27,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 07:08:27,578 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 47 [2021-08-27 07:08:27,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:08:27,579 INFO L225 Difference]: With dead ends: 100 [2021-08-27 07:08:27,579 INFO L226 Difference]: Without dead ends: 100 [2021-08-27 07:08:27,579 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 55.8ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-27 07:08:27,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-08-27 07:08:27,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2021-08-27 07:08:27,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 66 states have (on average 1.393939393939394) internal successors, (92), 85 states have internal predecessors, (92), 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) [2021-08-27 07:08:27,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 107 transitions. [2021-08-27 07:08:27,581 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 107 transitions. Word has length 47 [2021-08-27 07:08:27,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:08:27,581 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 107 transitions. [2021-08-27 07:08:27,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-08-27 07:08:27,581 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 107 transitions. [2021-08-27 07:08:27,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-27 07:08:27,581 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:08:27,582 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:08:27,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-27 07:08:27,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-27 07:08:27,803 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting dll_circular_update_atErr3REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-08-27 07:08:27,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:08:27,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1941428179, now seen corresponding path program 1 times [2021-08-27 07:08:27,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:08:27,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878002239] [2021-08-27 07:08:27,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:08:27,804 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:08:27,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:27,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:08:27,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:27,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:08:27,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:27,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-08-27 07:08:27,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:27,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 07:08:27,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:27,867 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-27 07:08:27,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:08:27,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878002239] [2021-08-27 07:08:27,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878002239] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:08:27,867 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:08:27,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-27 07:08:27,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58728075] [2021-08-27 07:08:27,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 07:08:27,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:08:27,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 07:08:27,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-27 07:08:27,868 INFO L87 Difference]: Start difference. First operand 100 states and 107 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-08-27 07:08:28,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:08:28,089 INFO L93 Difference]: Finished difference Result 132 states and 141 transitions. [2021-08-27 07:08:28,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-27 07:08:28,089 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 48 [2021-08-27 07:08:28,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:08:28,090 INFO L225 Difference]: With dead ends: 132 [2021-08-27 07:08:28,090 INFO L226 Difference]: Without dead ends: 132 [2021-08-27 07:08:28,090 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 79.3ms TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-08-27 07:08:28,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-08-27 07:08:28,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 106. [2021-08-27 07:08:28,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 70 states have (on average 1.3714285714285714) internal successors, (96), 90 states have internal predecessors, (96), 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) [2021-08-27 07:08:28,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 113 transitions. [2021-08-27 07:08:28,092 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 113 transitions. Word has length 48 [2021-08-27 07:08:28,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:08:28,093 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 113 transitions. [2021-08-27 07:08:28,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-08-27 07:08:28,093 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 113 transitions. [2021-08-27 07:08:28,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-27 07:08:28,093 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:08:28,093 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:08:28,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-08-27 07:08:28,093 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting dll_circular_get_data_atErr2REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-08-27 07:08:28,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:08:28,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1934169815, now seen corresponding path program 1 times [2021-08-27 07:08:28,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:08:28,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833025009] [2021-08-27 07:08:28,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:08:28,094 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:08:28,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:28,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:08:28,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:28,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:08:28,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:28,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-08-27 07:08:28,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:28,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 07:08:28,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:28,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-08-27 07:08:28,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:28,236 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-27 07:08:28,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:08:28,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833025009] [2021-08-27 07:08:28,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833025009] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:08:28,237 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:08:28,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-08-27 07:08:28,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662614424] [2021-08-27 07:08:28,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-27 07:08:28,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:08:28,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-27 07:08:28,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-08-27 07:08:28,238 INFO L87 Difference]: Start difference. First operand 106 states and 113 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) [2021-08-27 07:08:28,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:08:28,687 INFO L93 Difference]: Finished difference Result 133 states and 141 transitions. [2021-08-27 07:08:28,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-27 07:08:28,687 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 55 [2021-08-27 07:08:28,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:08:28,688 INFO L225 Difference]: With dead ends: 133 [2021-08-27 07:08:28,688 INFO L226 Difference]: Without dead ends: 133 [2021-08-27 07:08:28,688 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 170.1ms TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-08-27 07:08:28,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-08-27 07:08:28,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 109. [2021-08-27 07:08:28,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 73 states have (on average 1.3972602739726028) internal successors, (102), 93 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) [2021-08-27 07:08:28,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 119 transitions. [2021-08-27 07:08:28,691 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 119 transitions. Word has length 55 [2021-08-27 07:08:28,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:08:28,691 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 119 transitions. [2021-08-27 07:08:28,691 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) [2021-08-27 07:08:28,691 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 119 transitions. [2021-08-27 07:08:28,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-27 07:08:28,691 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:08:28,691 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:08:28,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-08-27 07:08:28,691 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting dll_circular_get_data_atErr3REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-08-27 07:08:28,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:08:28,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1934169816, now seen corresponding path program 1 times [2021-08-27 07:08:28,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:08:28,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839946594] [2021-08-27 07:08:28,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:08:28,692 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:08:28,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:28,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:08:28,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:28,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:08:28,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:28,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-08-27 07:08:28,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:28,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 07:08:28,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:28,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-08-27 07:08:28,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:28,770 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-27 07:08:28,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:08:28,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839946594] [2021-08-27 07:08:28,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839946594] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:08:28,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486058811] [2021-08-27 07:08:28,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:08:28,770 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:08:28,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:08:28,771 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 07:08:28,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-27 07:08:28,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:28,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-27 07:08:29,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:08:29,133 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-27 07:08:29,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486058811] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:08:29,134 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 07:08:29,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2021-08-27 07:08:29,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384042193] [2021-08-27 07:08:29,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-27 07:08:29,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:08:29,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-27 07:08:29,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-27 07:08:29,135 INFO L87 Difference]: Start difference. First operand 109 states and 119 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 8 states have internal predecessors, (45), 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) [2021-08-27 07:08:29,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:08:29,424 INFO L93 Difference]: Finished difference Result 137 states and 149 transitions. [2021-08-27 07:08:29,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-27 07:08:29,424 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 8 states have internal predecessors, (45), 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 55 [2021-08-27 07:08:29,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:08:29,425 INFO L225 Difference]: With dead ends: 137 [2021-08-27 07:08:29,425 INFO L226 Difference]: Without dead ends: 137 [2021-08-27 07:08:29,425 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 89.0ms TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-08-27 07:08:29,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-08-27 07:08:29,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 116. [2021-08-27 07:08:29,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 79 states have (on average 1.379746835443038) internal successors, (109), 98 states have internal predecessors, (109), 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) [2021-08-27 07:08:29,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 128 transitions. [2021-08-27 07:08:29,427 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 128 transitions. Word has length 55 [2021-08-27 07:08:29,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:08:29,428 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 128 transitions. [2021-08-27 07:08:29,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 8 states have internal predecessors, (45), 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) [2021-08-27 07:08:29,428 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 128 transitions. [2021-08-27 07:08:29,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-27 07:08:29,428 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:08:29,428 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:08:29,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-27 07:08:29,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:08:29,646 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting dll_circular_update_atErr3REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-08-27 07:08:29,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:08:29,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1596450663, now seen corresponding path program 1 times [2021-08-27 07:08:29,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:08:29,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985143681] [2021-08-27 07:08:29,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:08:29,647 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:08:29,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:29,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:08:29,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:29,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:08:29,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:30,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-08-27 07:08:30,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:30,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 07:08:30,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:30,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-08-27 07:08:30,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:30,537 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 07:08:30,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:08:30,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985143681] [2021-08-27 07:08:30,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985143681] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:08:30,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706654484] [2021-08-27 07:08:30,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:08:30,538 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:08:30,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:08:30,553 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 07:08:30,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-27 07:08:30,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:30,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 99 conjunts are in the unsatisfiable core [2021-08-27 07:08:30,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:08:30,882 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 [2021-08-27 07:08:31,327 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 07:08:31,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-08-27 07:08:31,347 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 07:08:31,347 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 [2021-08-27 07:08:31,491 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 [2021-08-27 07:08:31,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-08-27 07:08:31,610 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 19 treesize of output 18 [2021-08-27 07:08:31,622 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 19 treesize of output 18 [2021-08-27 07:08:31,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-08-27 07:08:31,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-08-27 07:08:31,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 07:08:31,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-27 07:08:31,926 INFO L354 Elim1Store]: treesize reduction 41, result has 21.2 percent of original size [2021-08-27 07:08:31,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 99 treesize of output 104 [2021-08-27 07:08:31,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 07:08:31,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-27 07:08:31,936 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-27 07:08:31,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 95 treesize of output 79 [2021-08-27 07:08:32,436 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-27 07:08:32,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 92 treesize of output 55 [2021-08-27 07:08:32,441 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-27 07:08:32,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 27 [2021-08-27 07:08:35,476 INFO L354 Elim1Store]: treesize reduction 168, result has 18.0 percent of original size [2021-08-27 07:08:35,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 128 treesize of output 121 [2021-08-27 07:08:35,506 INFO L354 Elim1Store]: treesize reduction 136, result has 17.6 percent of original size [2021-08-27 07:08:35,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 109 treesize of output 81 [2021-08-27 07:08:35,953 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-27 07:08:35,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 65 [2021-08-27 07:08:35,960 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-27 07:08:35,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 30 [2021-08-27 07:08:36,109 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-27 07:08:36,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706654484] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:08:36,110 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 07:08:36,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 52 [2021-08-27 07:08:36,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396119558] [2021-08-27 07:08:36,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-08-27 07:08:36,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:08:36,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-08-27 07:08:36,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=2630, Unknown=1, NotChecked=0, Total=2756 [2021-08-27 07:08:36,112 INFO L87 Difference]: Start difference. First operand 116 states and 128 transitions. Second operand has 53 states, 52 states have (on average 1.6346153846153846) internal successors, (85), 40 states have internal predecessors, (85), 6 states have call successors, (13), 8 states have call predecessors, (13), 9 states have return successors, (9), 9 states have call predecessors, (9), 5 states have call successors, (9) [2021-08-27 07:08:52,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:08:52,002 INFO L93 Difference]: Finished difference Result 241 states and 268 transitions. [2021-08-27 07:08:52,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-27 07:08:52,002 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.6346153846153846) internal successors, (85), 40 states have internal predecessors, (85), 6 states have call successors, (13), 8 states have call predecessors, (13), 9 states have return successors, (9), 9 states have call predecessors, (9), 5 states have call successors, (9) Word has length 56 [2021-08-27 07:08:52,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:08:52,012 INFO L225 Difference]: With dead ends: 241 [2021-08-27 07:08:52,012 INFO L226 Difference]: Without dead ends: 241 [2021-08-27 07:08:52,014 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 10908.9ms TimeCoverageRelationStatistics Valid=403, Invalid=5757, Unknown=2, NotChecked=0, Total=6162 [2021-08-27 07:08:52,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-08-27 07:08:52,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 131. [2021-08-27 07:08:52,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 91 states have (on average 1.3846153846153846) internal successors, (126), 111 states have internal predecessors, (126), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2021-08-27 07:08:52,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 149 transitions. [2021-08-27 07:08:52,030 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 149 transitions. Word has length 56 [2021-08-27 07:08:52,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:08:52,031 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 149 transitions. [2021-08-27 07:08:52,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 1.6346153846153846) internal successors, (85), 40 states have internal predecessors, (85), 6 states have call successors, (13), 8 states have call predecessors, (13), 9 states have return successors, (9), 9 states have call predecessors, (9), 5 states have call successors, (9) [2021-08-27 07:08:52,031 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 149 transitions. [2021-08-27 07:08:52,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-27 07:08:52,033 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:08:52,034 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:08:52,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-27 07:08:52,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:08:52,249 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting dll_circular_update_atErr2REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-08-27 07:08:52,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:08:52,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1596450664, now seen corresponding path program 1 times [2021-08-27 07:08:52,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:08:52,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631220857] [2021-08-27 07:08:52,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:08:52,249 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:08:52,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:52,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:08:52,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:52,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:08:52,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:52,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-08-27 07:08:52,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:52,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 07:08:52,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:52,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-08-27 07:08:52,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:52,800 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 07:08:52,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:08:52,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631220857] [2021-08-27 07:08:52,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631220857] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:08:52,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985683810] [2021-08-27 07:08:52,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:08:52,802 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:08:52,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:08:52,803 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 07:08:52,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-27 07:08:53,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:08:53,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-27 07:08:53,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:08:53,182 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 [2021-08-27 07:08:53,321 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 07:08:53,321 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 [2021-08-27 07:08:53,387 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 [2021-08-27 07:08:53,449 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 21 treesize of output 20 [2021-08-27 07:08:53,558 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-08-27 07:08:53,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2021-08-27 07:08:53,635 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-08-27 07:08:53,636 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 48 treesize of output 41 [2021-08-27 07:08:53,909 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-08-27 07:08:53,909 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 44 treesize of output 19 [2021-08-27 07:09:07,259 INFO L354 Elim1Store]: treesize reduction 138, result has 15.9 percent of original size [2021-08-27 07:09:07,260 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 66 treesize of output 47 [2021-08-27 07:09:07,489 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-08-27 07:09:07,489 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 51 treesize of output 22 [2021-08-27 07:09:07,497 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-27 07:09:07,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985683810] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:09:07,497 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 07:09:07,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25] total 47 [2021-08-27 07:09:07,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37835359] [2021-08-27 07:09:07,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-08-27 07:09:07,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:09:07,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-08-27 07:09:07,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=2117, Unknown=19, NotChecked=0, Total=2256 [2021-08-27 07:09:07,499 INFO L87 Difference]: Start difference. First operand 131 states and 149 transitions. Second operand has 48 states, 47 states have (on average 1.6595744680851063) internal successors, (78), 35 states have internal predecessors, (78), 6 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (9), 9 states have call predecessors, (9), 5 states have call successors, (9) [2021-08-27 07:09:34,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:09:34,548 INFO L93 Difference]: Finished difference Result 206 states and 237 transitions. [2021-08-27 07:09:34,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-27 07:09:34,552 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 1.6595744680851063) internal successors, (78), 35 states have internal predecessors, (78), 6 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (9), 9 states have call predecessors, (9), 5 states have call successors, (9) Word has length 56 [2021-08-27 07:09:34,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:09:34,552 INFO L225 Difference]: With dead ends: 206 [2021-08-27 07:09:34,552 INFO L226 Difference]: Without dead ends: 206 [2021-08-27 07:09:34,553 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 18500.2ms TimeCoverageRelationStatistics Valid=388, Invalid=4705, Unknown=19, NotChecked=0, Total=5112 [2021-08-27 07:09:34,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-08-27 07:09:34,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 145. [2021-08-27 07:09:34,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 102 states have (on average 1.3725490196078431) internal successors, (140), 123 states have internal predecessors, (140), 12 states have call successors, (12), 10 states have call predecessors, (12), 11 states have return successors, (16), 11 states have call predecessors, (16), 11 states have call successors, (16) [2021-08-27 07:09:34,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 168 transitions. [2021-08-27 07:09:34,564 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 168 transitions. Word has length 56 [2021-08-27 07:09:34,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:09:34,564 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 168 transitions. [2021-08-27 07:09:34,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 1.6595744680851063) internal successors, (78), 35 states have internal predecessors, (78), 6 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (9), 9 states have call predecessors, (9), 5 states have call successors, (9) [2021-08-27 07:09:34,565 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 168 transitions. [2021-08-27 07:09:34,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-27 07:09:34,565 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:09:34,565 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] [2021-08-27 07:09:34,582 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-08-27 07:09:34,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:09:34,766 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting dll_circular_update_atErr3REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-08-27 07:09:34,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:09:34,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1687196488, now seen corresponding path program 2 times [2021-08-27 07:09:34,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:09:34,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247399993] [2021-08-27 07:09:34,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:09:34,767 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:09:34,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:09:34,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:09:34,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:09:34,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:09:34,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:09:34,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-08-27 07:09:34,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:09:34,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 07:09:34,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:09:34,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-08-27 07:09:34,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:09:34,916 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-27 07:09:34,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:09:34,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247399993] [2021-08-27 07:09:34,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247399993] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:09:34,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258878628] [2021-08-27 07:09:34,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 07:09:34,917 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:09:34,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:09:34,933 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 07:09:34,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-27 07:09:35,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 07:09:35,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 07:09:35,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-27 07:09:35,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:09:35,602 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-08-27 07:09:35,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258878628] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:09:35,602 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 07:09:35,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 11 [2021-08-27 07:09:35,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035883727] [2021-08-27 07:09:35,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-27 07:09:35,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:09:35,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-27 07:09:35,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-08-27 07:09:35,603 INFO L87 Difference]: Start difference. First operand 145 states and 168 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 7 states have internal predecessors, (49), 4 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-08-27 07:09:35,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:09:35,988 INFO L93 Difference]: Finished difference Result 147 states and 161 transitions. [2021-08-27 07:09:35,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-27 07:09:35,989 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 7 states have internal predecessors, (49), 4 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 59 [2021-08-27 07:09:35,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:09:35,990 INFO L225 Difference]: With dead ends: 147 [2021-08-27 07:09:35,990 INFO L226 Difference]: Without dead ends: 147 [2021-08-27 07:09:35,990 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 204.3ms TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-08-27 07:09:35,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-08-27 07:09:35,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 126. [2021-08-27 07:09:35,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 89 states have (on average 1.3146067415730338) internal successors, (117), 106 states have internal predecessors, (117), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2021-08-27 07:09:35,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 140 transitions. [2021-08-27 07:09:35,993 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 140 transitions. Word has length 59 [2021-08-27 07:09:35,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:09:35,993 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 140 transitions. [2021-08-27 07:09:35,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 7 states have internal predecessors, (49), 4 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-08-27 07:09:35,993 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 140 transitions. [2021-08-27 07:09:35,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-08-27 07:09:35,994 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:09:35,994 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-27 07:09:36,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-27 07:09:36,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-08-27 07:09:36,215 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting dll_circular_get_data_atErr3REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-08-27 07:09:36,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:09:36,216 INFO L82 PathProgramCache]: Analyzing trace with hash -588638996, now seen corresponding path program 2 times [2021-08-27 07:09:36,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:09:36,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559574930] [2021-08-27 07:09:36,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:09:36,216 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:09:36,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:09:36,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:09:36,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:09:36,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:09:36,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:09:36,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-08-27 07:09:36,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:09:36,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 07:09:36,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:09:36,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-08-27 07:09:36,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:09:36,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-08-27 07:09:36,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:09:36,305 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-08-27 07:09:36,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:09:36,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559574930] [2021-08-27 07:09:36,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559574930] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:09:36,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395916440] [2021-08-27 07:09:36,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 07:09:36,306 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:09:36,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:09:36,307 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 07:09:36,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-27 07:09:36,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-08-27 07:09:36,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 07:09:36,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-27 07:09:36,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:09:37,186 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-27 07:09:37,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395916440] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:09:37,187 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-27 07:09:37,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [9] total 21 [2021-08-27 07:09:37,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391995147] [2021-08-27 07:09:37,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-27 07:09:37,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:09:37,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-27 07:09:37,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-08-27 07:09:37,188 INFO L87 Difference]: Start difference. First operand 126 states and 140 transitions. Second operand has 14 states, 13 states have (on average 3.0) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-08-27 07:09:37,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:09:37,525 INFO L93 Difference]: Finished difference Result 131 states and 144 transitions. [2021-08-27 07:09:37,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-27 07:09:37,525 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.0) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 63 [2021-08-27 07:09:37,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:09:37,526 INFO L225 Difference]: With dead ends: 131 [2021-08-27 07:09:37,526 INFO L226 Difference]: Without dead ends: 131 [2021-08-27 07:09:37,526 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 366.2ms TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2021-08-27 07:09:37,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-08-27 07:09:37,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 126. [2021-08-27 07:09:37,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 89 states have (on average 1.303370786516854) internal successors, (116), 106 states have internal predecessors, (116), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2021-08-27 07:09:37,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 139 transitions. [2021-08-27 07:09:37,529 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 139 transitions. Word has length 63 [2021-08-27 07:09:37,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:09:37,529 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 139 transitions. [2021-08-27 07:09:37,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.0) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-08-27 07:09:37,529 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 139 transitions. [2021-08-27 07:09:37,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-08-27 07:09:37,529 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:09:37,529 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-27 07:09:37,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-27 07:09:37,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-27 07:09:37,737 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting dll_circular_get_data_atErr1REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-08-27 07:09:37,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:09:37,737 INFO L82 PathProgramCache]: Analyzing trace with hash -588638941, now seen corresponding path program 1 times [2021-08-27 07:09:37,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:09:37,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232627563] [2021-08-27 07:09:37,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:09:37,737 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:09:37,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:09:37,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:09:37,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:09:37,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:09:37,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:09:37,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-08-27 07:09:37,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:09:37,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 07:09:37,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:09:37,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-08-27 07:09:37,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:09:37,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-08-27 07:09:37,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:09:37,838 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-08-27 07:09:37,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:09:37,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232627563] [2021-08-27 07:09:37,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232627563] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:09:37,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:09:37,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-27 07:09:37,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353694712] [2021-08-27 07:09:37,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-27 07:09:37,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:09:37,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 07:09:37,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-08-27 07:09:37,839 INFO L87 Difference]: Start difference. First operand 126 states and 139 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-08-27 07:09:38,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:09:38,120 INFO L93 Difference]: Finished difference Result 153 states and 165 transitions. [2021-08-27 07:09:38,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-27 07:09:38,121 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 63 [2021-08-27 07:09:38,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:09:38,122 INFO L225 Difference]: With dead ends: 153 [2021-08-27 07:09:38,122 INFO L226 Difference]: Without dead ends: 153 [2021-08-27 07:09:38,122 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 93.0ms TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-08-27 07:09:38,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-08-27 07:09:38,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 132. [2021-08-27 07:09:38,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 94 states have (on average 1.2872340425531914) internal successors, (121), 111 states have internal predecessors, (121), 11 states have call successors, (11), 10 states have call predecessors, (11), 10 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2021-08-27 07:09:38,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 144 transitions. [2021-08-27 07:09:38,124 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 144 transitions. Word has length 63 [2021-08-27 07:09:38,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:09:38,125 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 144 transitions. [2021-08-27 07:09:38,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-08-27 07:09:38,125 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 144 transitions. [2021-08-27 07:09:38,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-27 07:09:38,125 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:09:38,125 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-08-27 07:09:38,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-08-27 07:09:38,126 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting dll_circular_update_atErr2REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-08-27 07:09:38,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:09:38,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1201906211, now seen corresponding path program 2 times [2021-08-27 07:09:38,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:09:38,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109746206] [2021-08-27 07:09:38,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:09:38,126 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:09:38,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:09:38,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:09:38,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:09:38,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:09:38,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:09:38,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-08-27 07:09:38,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:09:38,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 07:09:38,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:09:38,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-08-27 07:09:38,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:09:38,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-08-27 07:09:38,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:09:38,228 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-08-27 07:09:38,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:09:38,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109746206] [2021-08-27 07:09:38,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109746206] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:09:38,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439353408] [2021-08-27 07:09:38,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 07:09:38,229 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:09:38,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:09:38,230 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 07:09:38,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-27 07:09:38,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 07:09:38,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 07:09:38,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-27 07:09:38,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:09:38,923 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-08-27 07:09:38,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439353408] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:09:38,924 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-27 07:09:38,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2021-08-27 07:09:38,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186620550] [2021-08-27 07:09:38,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 07:09:38,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:09:38,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 07:09:38,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-08-27 07:09:38,925 INFO L87 Difference]: Start difference. First operand 132 states and 144 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-08-27 07:09:38,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:09:38,952 INFO L93 Difference]: Finished difference Result 123 states and 129 transitions. [2021-08-27 07:09:38,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 07:09:38,953 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 67 [2021-08-27 07:09:38,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:09:38,953 INFO L225 Difference]: With dead ends: 123 [2021-08-27 07:09:38,954 INFO L226 Difference]: Without dead ends: 123 [2021-08-27 07:09:38,954 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 69.5ms TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-08-27 07:09:38,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-08-27 07:09:38,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 116. [2021-08-27 07:09:38,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 82 states have (on average 1.2682926829268293) internal successors, (104), 97 states have internal predecessors, (104), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-08-27 07:09:38,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 123 transitions. [2021-08-27 07:09:38,956 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 123 transitions. Word has length 67 [2021-08-27 07:09:38,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:09:38,956 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 123 transitions. [2021-08-27 07:09:38,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-08-27 07:09:38,956 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 123 transitions. [2021-08-27 07:09:38,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-08-27 07:09:38,957 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:09:38,957 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-27 07:09:38,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-27 07:09:39,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-08-27 07:09:39,170 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-08-27 07:09:39,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:09:39,170 INFO L82 PathProgramCache]: Analyzing trace with hash 12643276, now seen corresponding path program 1 times [2021-08-27 07:09:39,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:09:39,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814892793] [2021-08-27 07:09:39,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:09:39,170 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:09:39,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:09:39,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:09:39,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:09:39,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:09:39,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:09:39,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-08-27 07:09:39,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:09:39,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 07:09:39,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:09:39,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-08-27 07:09:39,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:09:39,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-08-27 07:09:39,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:09:39,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-08-27 07:09:39,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:09:39,289 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-08-27 07:09:39,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:09:39,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814892793] [2021-08-27 07:09:39,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814892793] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:09:39,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836669534] [2021-08-27 07:09:39,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:09:39,290 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:09:39,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:09:39,305 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 07:09:39,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-27 07:09:39,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:09:39,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-27 07:09:39,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:09:39,968 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-08-27 07:09:39,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836669534] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:09:39,969 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-27 07:09:39,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2021-08-27 07:09:39,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721443131] [2021-08-27 07:09:39,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 07:09:39,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:09:39,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 07:09:39,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-08-27 07:09:39,970 INFO L87 Difference]: Start difference. First operand 116 states and 123 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-08-27 07:09:40,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:09:40,009 INFO L93 Difference]: Finished difference Result 121 states and 126 transitions. [2021-08-27 07:09:40,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 07:09:40,009 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 69 [2021-08-27 07:09:40,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:09:40,010 INFO L225 Difference]: With dead ends: 121 [2021-08-27 07:09:40,010 INFO L226 Difference]: Without dead ends: 118 [2021-08-27 07:09:40,010 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 61.2ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-08-27 07:09:40,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-08-27 07:09:40,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 116. [2021-08-27 07:09:40,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 82 states have (on average 1.2560975609756098) internal successors, (103), 97 states have internal predecessors, (103), 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) [2021-08-27 07:09:40,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 122 transitions. [2021-08-27 07:09:40,013 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 122 transitions. Word has length 69 [2021-08-27 07:09:40,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:09:40,013 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 122 transitions. [2021-08-27 07:09:40,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-08-27 07:09:40,013 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 122 transitions. [2021-08-27 07:09:40,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-27 07:09:40,014 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:09:40,014 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-27 07:09:40,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-27 07:09:40,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-27 07:09:40,228 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-08-27 07:09:40,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:09:40,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1401782797, now seen corresponding path program 1 times [2021-08-27 07:09:40,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:09:40,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590497171] [2021-08-27 07:09:40,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:09:40,228 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:09:40,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:09:40,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:09:40,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:09:40,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:09:40,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:09:40,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-08-27 07:09:40,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:09:40,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 07:09:40,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:09:40,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-08-27 07:09:40,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:09:40,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-08-27 07:09:40,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:09:41,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-08-27 07:09:41,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:09:41,191 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-27 07:09:41,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:09:41,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590497171] [2021-08-27 07:09:41,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590497171] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:09:41,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994184667] [2021-08-27 07:09:41,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:09:41,192 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:09:41,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:09:41,199 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 07:09:41,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-27 07:09:41,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:09:41,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 97 conjunts are in the unsatisfiable core [2021-08-27 07:09:41,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:09:41,760 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 [2021-08-27 07:09:41,988 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 07:09:41,988 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 [2021-08-27 07:09:42,067 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 [2021-08-27 07:09:42,121 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 21 treesize of output 20 [2021-08-27 07:09:42,247 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-08-27 07:09:42,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2021-08-27 07:09:42,317 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-08-27 07:09:42,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 36 [2021-08-27 07:09:42,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-08-27 07:09:42,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 07:09:42,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 07:09:42,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 07:09:42,871 INFO L354 Elim1Store]: treesize reduction 71, result has 11.3 percent of original size [2021-08-27 07:09:42,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 39 [2021-08-27 07:09:43,698 WARN L860 $PredicateComparison]: unable to prove that (exists ((dll_circular_update_at_~data Int) (dll_circular_update_at_~head.offset Int)) (= |c_#memory_int| (let ((.cse0 (select (select |c_old(#memory_$Pointer$.base)| |c_dll_circular_update_at_#in~head.base|) |c_dll_circular_update_at_#in~head.offset|))) (store |c_old(#memory_int)| .cse0 (store (select |c_old(#memory_int)| .cse0) (+ dll_circular_update_at_~head.offset 8) dll_circular_update_at_~data))))) is different from true [2021-08-27 07:09:43,716 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-08-27 07:09:43,716 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 69 treesize of output 36 [2021-08-27 07:09:43,725 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-08-27 07:09:43,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-08-27 07:09:44,177 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-08-27 07:09:44,178 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 [2021-08-27 07:09:44,232 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-08-27 07:09:44,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994184667] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:09:44,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 07:09:44,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 37] total 68 [2021-08-27 07:09:44,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748585713] [2021-08-27 07:09:44,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-08-27 07:09:44,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:09:44,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-08-27 07:09:44,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=4230, Unknown=1, NotChecked=130, Total=4556 [2021-08-27 07:09:44,235 INFO L87 Difference]: Start difference. First operand 116 states and 122 transitions. Second operand has 68 states, 63 states have (on average 1.6984126984126984) internal successors, (107), 54 states have internal predecessors, (107), 10 states have call successors, (15), 8 states have call predecessors, (15), 12 states have return successors, (13), 13 states have call predecessors, (13), 10 states have call successors, (13) [2021-08-27 07:09:53,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:09:53,408 INFO L93 Difference]: Finished difference Result 140 states and 145 transitions. [2021-08-27 07:09:53,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-27 07:09:53,408 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 63 states have (on average 1.6984126984126984) internal successors, (107), 54 states have internal predecessors, (107), 10 states have call successors, (15), 8 states have call predecessors, (15), 12 states have return successors, (13), 13 states have call predecessors, (13), 10 states have call successors, (13) Word has length 72 [2021-08-27 07:09:53,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:09:53,409 INFO L225 Difference]: With dead ends: 140 [2021-08-27 07:09:53,409 INFO L226 Difference]: Without dead ends: 140 [2021-08-27 07:09:53,410 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 99 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1968 ImplicationChecksByTransitivity, 9456.4ms TimeCoverageRelationStatistics Valid=547, Invalid=9346, Unknown=11, NotChecked=196, Total=10100 [2021-08-27 07:09:53,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-08-27 07:09:53,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 116. [2021-08-27 07:09:53,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 82 states have (on average 1.2439024390243902) internal successors, (102), 97 states have internal predecessors, (102), 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) [2021-08-27 07:09:53,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 121 transitions. [2021-08-27 07:09:53,413 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 121 transitions. Word has length 72 [2021-08-27 07:09:53,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:09:53,413 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 121 transitions. [2021-08-27 07:09:53,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 63 states have (on average 1.6984126984126984) internal successors, (107), 54 states have internal predecessors, (107), 10 states have call successors, (15), 8 states have call predecessors, (15), 12 states have return successors, (13), 13 states have call predecessors, (13), 10 states have call successors, (13) [2021-08-27 07:09:53,413 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 121 transitions. [2021-08-27 07:09:53,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-08-27 07:09:53,413 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:09:53,413 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:09:53,455 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-08-27 07:09:53,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:09:53,614 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting dll_circular_get_data_atErr1REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-08-27 07:09:53,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:09:53,614 INFO L82 PathProgramCache]: Analyzing trace with hash 813165309, now seen corresponding path program 1 times [2021-08-27 07:09:53,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:09:53,614 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567220201] [2021-08-27 07:09:53,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:09:53,614 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:09:53,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:09:53,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:09:53,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:09:53,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:09:53,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:09:53,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-08-27 07:09:53,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:09:53,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 07:09:53,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:09:53,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-08-27 07:09:53,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:09:53,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-08-27 07:09:53,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:09:53,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-08-27 07:09:53,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:09:53,862 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-27 07:09:53,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:09:53,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567220201] [2021-08-27 07:09:53,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567220201] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:09:53,862 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:09:53,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-08-27 07:09:53,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143417835] [2021-08-27 07:09:53,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-27 07:09:53,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:09:53,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-27 07:09:53,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-08-27 07:09:53,864 INFO L87 Difference]: Start difference. First operand 116 states and 121 transitions. Second operand has 15 states, 14 states have (on average 3.857142857142857) internal successors, (54), 9 states have internal predecessors, (54), 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) [2021-08-27 07:09:54,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:09:54,446 INFO L93 Difference]: Finished difference Result 139 states and 144 transitions. [2021-08-27 07:09:54,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-27 07:09:54,447 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.857142857142857) internal successors, (54), 9 states have internal predecessors, (54), 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 77 [2021-08-27 07:09:54,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:09:54,448 INFO L225 Difference]: With dead ends: 139 [2021-08-27 07:09:54,448 INFO L226 Difference]: Without dead ends: 139 [2021-08-27 07:09:54,448 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 264.9ms TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-08-27 07:09:54,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-08-27 07:09:54,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 116. [2021-08-27 07:09:54,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 82 states have (on average 1.2317073170731707) internal successors, (101), 97 states have internal predecessors, (101), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-08-27 07:09:54,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 120 transitions. [2021-08-27 07:09:54,455 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 120 transitions. Word has length 77 [2021-08-27 07:09:54,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:09:54,455 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 120 transitions. [2021-08-27 07:09:54,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.857142857142857) internal successors, (54), 9 states have internal predecessors, (54), 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) [2021-08-27 07:09:54,456 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 120 transitions. [2021-08-27 07:09:54,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-27 07:09:54,457 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:09:54,457 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-27 07:09:54,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-08-27 07:09:54,457 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting dll_circular_get_data_atErr2REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-08-27 07:09:54,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:09:54,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1392196614, now seen corresponding path program 1 times [2021-08-27 07:09:54,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:09:54,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347892241] [2021-08-27 07:09:54,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:09:54,458 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:09:54,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:09:54,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:09:54,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:09:54,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:09:54,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:09:54,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-08-27 07:09:54,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:09:54,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 07:09:54,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:09:55,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-08-27 07:09:55,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:09:55,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-08-27 07:09:55,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:09:55,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-08-27 07:09:55,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:09:55,297 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-27 07:09:55,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:09:55,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347892241] [2021-08-27 07:09:55,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347892241] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:09:55,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594007283] [2021-08-27 07:09:55,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:09:55,298 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:09:55,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:09:55,299 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 07:09:55,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-27 07:09:55,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:09:55,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 78 conjunts are in the unsatisfiable core [2021-08-27 07:09:55,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:09:55,898 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 [2021-08-27 07:09:56,110 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 07:09:56,111 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 [2021-08-27 07:09:56,208 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 [2021-08-27 07:09:56,262 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 21 treesize of output 20 [2021-08-27 07:09:56,388 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-08-27 07:09:56,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2021-08-27 07:09:56,458 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-08-27 07:09:56,458 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 39 treesize of output 36 [2021-08-27 07:09:57,213 WARN L860 $PredicateComparison]: unable to prove that (exists ((dll_circular_update_at_~head.offset Int)) (and (<= |c_dll_circular_update_at_#in~head.offset| dll_circular_update_at_~head.offset) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_dll_circular_update_at_#in~head.base| (let ((.cse0 (+ dll_circular_update_at_~head.offset 8))) (store (select |c_old(#memory_$Pointer$.base)| |c_dll_circular_update_at_#in~head.base|) .cse0 (select (select |c_#memory_$Pointer$.base| |c_dll_circular_update_at_#in~head.base|) .cse0))))))) is different from true [2021-08-27 07:09:57,248 INFO L354 Elim1Store]: treesize reduction 138, result has 15.9 percent of original size [2021-08-27 07:09:57,248 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 57 treesize of output 42 [2021-08-27 07:09:58,047 INFO L354 Elim1Store]: treesize reduction 140, result has 18.6 percent of original size [2021-08-27 07:09:58,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 65 [2021-08-27 07:09:58,511 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-27 07:09:58,511 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 38 treesize of output 16 [2021-08-27 07:09:58,519 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 5 trivial. 2 not checked. [2021-08-27 07:09:58,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594007283] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:09:58,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 07:09:58,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 54 [2021-08-27 07:09:58,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370274255] [2021-08-27 07:09:58,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-08-27 07:09:58,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:09:58,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-08-27 07:09:58,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=2719, Unknown=1, NotChecked=104, Total=2970 [2021-08-27 07:09:58,522 INFO L87 Difference]: Start difference. First operand 116 states and 120 transitions. Second operand has 55 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 42 states have internal predecessors, (113), 8 states have call successors, (16), 9 states have call predecessors, (16), 11 states have return successors, (13), 11 states have call predecessors, (13), 8 states have call successors, (13) [2021-08-27 07:10:04,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:10:04,622 INFO L93 Difference]: Finished difference Result 147 states and 152 transitions. [2021-08-27 07:10:04,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-27 07:10:04,623 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 42 states have internal predecessors, (113), 8 states have call successors, (16), 9 states have call predecessors, (16), 11 states have return successors, (13), 11 states have call predecessors, (13), 8 states have call successors, (13) Word has length 80 [2021-08-27 07:10:04,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:10:04,623 INFO L225 Difference]: With dead ends: 147 [2021-08-27 07:10:04,623 INFO L226 Difference]: Without dead ends: 147 [2021-08-27 07:10:04,625 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1011 ImplicationChecksByTransitivity, 5871.4ms TimeCoverageRelationStatistics Valid=432, Invalid=5733, Unknown=1, NotChecked=154, Total=6320 [2021-08-27 07:10:04,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-08-27 07:10:04,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 120. [2021-08-27 07:10:04,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 86 states have (on average 1.255813953488372) internal successors, (108), 101 states have internal predecessors, (108), 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) [2021-08-27 07:10:04,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 127 transitions. [2021-08-27 07:10:04,627 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 127 transitions. Word has length 80 [2021-08-27 07:10:04,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:10:04,628 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 127 transitions. [2021-08-27 07:10:04,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 42 states have internal predecessors, (113), 8 states have call successors, (16), 9 states have call predecessors, (16), 11 states have return successors, (13), 11 states have call predecessors, (13), 8 states have call successors, (13) [2021-08-27 07:10:04,628 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 127 transitions. [2021-08-27 07:10:04,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-27 07:10:04,629 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:10:04,629 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-27 07:10:04,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-27 07:10:04,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-27 07:10:04,848 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting dll_circular_get_data_atErr3REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-08-27 07:10:04,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:10:04,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1392196615, now seen corresponding path program 1 times [2021-08-27 07:10:04,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:10:04,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683879794] [2021-08-27 07:10:04,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:10:04,849 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:10:04,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:10:05,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:10:05,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:10:05,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:10:05,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:10:05,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-08-27 07:10:05,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:10:05,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 07:10:05,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:10:05,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-08-27 07:10:05,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:10:05,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-08-27 07:10:05,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:10:05,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-08-27 07:10:05,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:10:05,946 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-27 07:10:05,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:10:05,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683879794] [2021-08-27 07:10:05,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683879794] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:10:05,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180652846] [2021-08-27 07:10:05,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:10:05,947 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:10:05,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:10:05,948 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 07:10:05,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-27 07:10:06,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:10:06,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 89 conjunts are in the unsatisfiable core [2021-08-27 07:10:06,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:10:06,644 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 [2021-08-27 07:10:07,035 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 07:10:07,035 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 [2021-08-27 07:10:07,132 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 [2021-08-27 07:10:07,195 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 21 treesize of output 20 [2021-08-27 07:10:07,334 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-08-27 07:10:07,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2021-08-27 07:10:07,412 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-08-27 07:10:07,412 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 39 treesize of output 36 [2021-08-27 07:10:08,346 WARN L860 $PredicateComparison]: unable to prove that (exists ((dll_circular_update_at_~head.offset Int)) (and (<= |c_dll_circular_update_at_#in~head.offset| dll_circular_update_at_~head.offset) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_dll_circular_update_at_#in~head.base| (let ((.cse0 (+ dll_circular_update_at_~head.offset 8))) (store (select |c_old(#memory_$Pointer$.base)| |c_dll_circular_update_at_#in~head.base|) .cse0 (select (select |c_#memory_$Pointer$.base| |c_dll_circular_update_at_#in~head.base|) .cse0))))))) is different from true [2021-08-27 07:10:08,409 INFO L354 Elim1Store]: treesize reduction 138, result has 15.9 percent of original size [2021-08-27 07:10:08,409 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 61 treesize of output 42 [2021-08-27 07:10:08,909 INFO L354 Elim1Store]: treesize reduction 180, result has 16.7 percent of original size [2021-08-27 07:10:08,909 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 141 treesize of output 122 [2021-08-27 07:10:08,928 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-08-27 07:10:08,935 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 112 treesize of output 94 [2021-08-27 07:10:09,592 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-27 07:10:09,592 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 62 treesize of output 38 [2021-08-27 07:10:09,594 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 32 treesize of output 20 [2021-08-27 07:10:09,697 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 2 not checked. [2021-08-27 07:10:09,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180652846] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:10:09,698 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 07:10:09,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 61 [2021-08-27 07:10:09,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438834078] [2021-08-27 07:10:09,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-08-27 07:10:09,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:10:09,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-08-27 07:10:09,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=3486, Unknown=1, NotChecked=118, Total=3782 [2021-08-27 07:10:09,718 INFO L87 Difference]: Start difference. First operand 120 states and 127 transitions. Second operand has 62 states, 61 states have (on average 2.0) internal successors, (122), 48 states have internal predecessors, (122), 8 states have call successors, (17), 10 states have call predecessors, (17), 12 states have return successors, (13), 11 states have call predecessors, (13), 8 states have call successors, (13) [2021-08-27 07:10:19,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:10:19,700 INFO L93 Difference]: Finished difference Result 146 states and 152 transitions. [2021-08-27 07:10:19,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-27 07:10:19,700 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 2.0) internal successors, (122), 48 states have internal predecessors, (122), 8 states have call successors, (17), 10 states have call predecessors, (17), 12 states have return successors, (13), 11 states have call predecessors, (13), 8 states have call successors, (13) Word has length 80 [2021-08-27 07:10:19,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:10:19,701 INFO L225 Difference]: With dead ends: 146 [2021-08-27 07:10:19,701 INFO L226 Difference]: Without dead ends: 146 [2021-08-27 07:10:19,703 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 91 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 8593.8ms TimeCoverageRelationStatistics Valid=551, Invalid=7823, Unknown=2, NotChecked=180, Total=8556 [2021-08-27 07:10:19,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-08-27 07:10:19,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 119. [2021-08-27 07:10:19,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 85 states have (on average 1.2352941176470589) internal successors, (105), 100 states have internal predecessors, (105), 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) [2021-08-27 07:10:19,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 124 transitions. [2021-08-27 07:10:19,720 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 124 transitions. Word has length 80 [2021-08-27 07:10:19,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:10:19,720 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 124 transitions. [2021-08-27 07:10:19,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 2.0) internal successors, (122), 48 states have internal predecessors, (122), 8 states have call successors, (17), 10 states have call predecessors, (17), 12 states have return successors, (13), 11 states have call predecessors, (13), 8 states have call successors, (13) [2021-08-27 07:10:19,721 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 124 transitions. [2021-08-27 07:10:19,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-08-27 07:10:19,721 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:10:19,721 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:10:19,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-27 07:10:19,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:10:19,922 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-08-27 07:10:19,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:10:19,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1374254630, now seen corresponding path program 1 times [2021-08-27 07:10:19,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:10:19,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659881907] [2021-08-27 07:10:19,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:10:19,923 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:10:19,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:10:19,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:10:19,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:10:19,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:10:19,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:10:19,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-08-27 07:10:19,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:10:19,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 07:10:19,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:10:20,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-08-27 07:10:20,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:10:20,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-08-27 07:10:20,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:10:20,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-08-27 07:10:20,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:10:20,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-08-27 07:10:20,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:10:20,029 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-08-27 07:10:20,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:10:20,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659881907] [2021-08-27 07:10:20,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659881907] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:10:20,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352859266] [2021-08-27 07:10:20,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:10:20,030 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:10:20,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:10:20,030 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 07:10:20,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-27 07:10:20,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:10:20,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-27 07:10:20,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:10:20,936 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-08-27 07:10:20,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352859266] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:10:20,936 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-27 07:10:20,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2021-08-27 07:10:20,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074956049] [2021-08-27 07:10:20,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 07:10:20,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:10:20,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 07:10:20,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-08-27 07:10:20,938 INFO L87 Difference]: Start difference. First operand 119 states and 124 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-08-27 07:10:20,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:10:20,986 INFO L93 Difference]: Finished difference Result 123 states and 127 transitions. [2021-08-27 07:10:20,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 07:10:20,986 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 83 [2021-08-27 07:10:20,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:10:20,987 INFO L225 Difference]: With dead ends: 123 [2021-08-27 07:10:20,987 INFO L226 Difference]: Without dead ends: 119 [2021-08-27 07:10:20,987 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 64.4ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-08-27 07:10:20,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-08-27 07:10:20,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2021-08-27 07:10:20,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 85 states have (on average 1.223529411764706) internal successors, (104), 100 states have internal predecessors, (104), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-08-27 07:10:20,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 123 transitions. [2021-08-27 07:10:20,999 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 123 transitions. Word has length 83 [2021-08-27 07:10:20,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:10:20,999 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 123 transitions. [2021-08-27 07:10:20,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-08-27 07:10:20,999 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 123 transitions. [2021-08-27 07:10:21,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-08-27 07:10:21,000 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:10:21,000 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:10:21,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-27 07:10:21,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:10:21,219 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting dll_circular_get_data_atErr2REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-08-27 07:10:21,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:10:21,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1568155867, now seen corresponding path program 2 times [2021-08-27 07:10:21,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:10:21,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147733884] [2021-08-27 07:10:21,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:10:21,220 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:10:21,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:10:21,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:10:21,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:10:21,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:10:21,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:10:21,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-08-27 07:10:21,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:10:21,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 07:10:21,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:10:21,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-08-27 07:10:21,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:10:21,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-08-27 07:10:21,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:10:21,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-08-27 07:10:21,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:10:21,394 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-08-27 07:10:21,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:10:21,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147733884] [2021-08-27 07:10:21,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147733884] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:10:21,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881050678] [2021-08-27 07:10:21,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 07:10:21,395 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:10:21,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:10:21,396 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 07:10:21,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-27 07:10:22,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 07:10:22,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 07:10:22,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-27 07:10:22,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:10:22,335 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-08-27 07:10:22,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881050678] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:10:22,335 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 07:10:22,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 11 [2021-08-27 07:10:22,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149193693] [2021-08-27 07:10:22,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-27 07:10:22,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:10:22,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-27 07:10:22,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-08-27 07:10:22,339 INFO L87 Difference]: Start difference. First operand 119 states and 123 transitions. Second operand has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 7 states have internal predecessors, (69), 4 states have call successors, (14), 5 states have call predecessors, (14), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-08-27 07:10:22,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:10:22,720 INFO L93 Difference]: Finished difference Result 129 states and 132 transitions. [2021-08-27 07:10:22,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-27 07:10:22,720 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 7 states have internal predecessors, (69), 4 states have call successors, (14), 5 states have call predecessors, (14), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 83 [2021-08-27 07:10:22,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:10:22,722 INFO L225 Difference]: With dead ends: 129 [2021-08-27 07:10:22,722 INFO L226 Difference]: Without dead ends: 129 [2021-08-27 07:10:22,723 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 189.0ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-08-27 07:10:22,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-08-27 07:10:22,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 110. [2021-08-27 07:10:22,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 80 states have (on average 1.1625) internal successors, (93), 91 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) [2021-08-27 07:10:22,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2021-08-27 07:10:22,732 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 83 [2021-08-27 07:10:22,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:10:22,733 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2021-08-27 07:10:22,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 7 states have internal predecessors, (69), 4 states have call successors, (14), 5 states have call predecessors, (14), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-08-27 07:10:22,733 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2021-08-27 07:10:22,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-08-27 07:10:22,733 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:10:22,733 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:10:22,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-27 07:10:22,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:10:22,949 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-08-27 07:10:22,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:10:22,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1923018073, now seen corresponding path program 1 times [2021-08-27 07:10:22,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:10:22,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958440773] [2021-08-27 07:10:22,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:10:22,949 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:10:22,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:10:23,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:10:23,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:10:23,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:10:23,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:10:23,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-08-27 07:10:23,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:10:23,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 07:10:23,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:10:23,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-08-27 07:10:23,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:10:23,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-08-27 07:10:23,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:10:24,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-08-27 07:10:24,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:10:24,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-08-27 07:10:24,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:10:24,244 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-27 07:10:24,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:10:24,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958440773] [2021-08-27 07:10:24,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958440773] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:10:24,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381945128] [2021-08-27 07:10:24,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:10:24,245 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:10:24,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:10:24,253 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 07:10:24,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-27 07:10:25,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:10:25,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 110 conjunts are in the unsatisfiable core [2021-08-27 07:10:25,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:10:25,068 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 [2021-08-27 07:10:25,385 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 07:10:25,386 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 [2021-08-27 07:10:25,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-08-27 07:10:25,542 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 21 treesize of output 20 [2021-08-27 07:10:25,717 INFO L354 Elim1Store]: treesize reduction 60, result has 22.1 percent of original size [2021-08-27 07:10:25,718 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 44 treesize of output 37 [2021-08-27 07:10:25,865 INFO L354 Elim1Store]: treesize reduction 76, result has 18.3 percent of original size [2021-08-27 07:10:25,865 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 46 treesize of output 39 [2021-08-27 07:10:26,953 WARN L860 $PredicateComparison]: unable to prove that (exists ((dll_circular_update_at_~head.offset Int)) (and (<= |c_dll_circular_update_at_#in~head.offset| dll_circular_update_at_~head.offset) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_dll_circular_update_at_#in~head.base| (let ((.cse0 (+ dll_circular_update_at_~head.offset 8))) (store (select |c_old(#memory_$Pointer$.base)| |c_dll_circular_update_at_#in~head.base|) .cse0 (select (select |c_#memory_$Pointer$.base| |c_dll_circular_update_at_#in~head.base|) .cse0))))))) is different from true [2021-08-27 07:10:26,997 INFO L354 Elim1Store]: treesize reduction 138, result has 15.9 percent of original size [2021-08-27 07:10:26,997 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 61 treesize of output 42 [2021-08-27 07:10:27,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-08-27 07:10:27,515 INFO L354 Elim1Store]: treesize reduction 180, result has 16.7 percent of original size [2021-08-27 07:10:27,516 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 136 treesize of output 117 [2021-08-27 07:10:27,525 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-08-27 07:10:27,525 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 107 treesize of output 93 [2021-08-27 07:10:29,749 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~s~0.base_BEFORE_CALL_21 Int) (v_main_~s~0.offset_BEFORE_CALL_21 Int)) (let ((.cse0 (select |c_#memory_$Pointer$.base| v_main_~s~0.base_BEFORE_CALL_21))) (let ((.cse1 (select .cse0 (+ v_main_~s~0.offset_BEFORE_CALL_21 4)))) (and (= (select .cse0 v_main_~s~0.offset_BEFORE_CALL_21) .cse1) (not (= v_main_~s~0.base_BEFORE_CALL_21 .cse1)))))) is different from true [2021-08-27 07:10:32,086 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~s~0.base_BEFORE_CALL_22 Int) (v_main_~s~0.offset_BEFORE_CALL_22 Int)) (let ((.cse1 (select |c_#memory_$Pointer$.base| v_main_~s~0.base_BEFORE_CALL_22))) (let ((.cse0 (select .cse1 (+ v_main_~s~0.offset_BEFORE_CALL_22 4)))) (and (not (= v_main_~s~0.base_BEFORE_CALL_22 .cse0)) (= (select .cse1 v_main_~s~0.offset_BEFORE_CALL_22) .cse0))))) is different from true [2021-08-27 07:10:46,673 INFO L354 Elim1Store]: treesize reduction 36, result has 53.2 percent of original size [2021-08-27 07:10:46,673 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 81 treesize of output 81 [2021-08-27 07:10:46,676 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 75 treesize of output 67 [2021-08-27 07:10:46,678 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 67 treesize of output 55 [2021-08-27 07:10:46,704 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 9 not checked. [2021-08-27 07:10:46,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381945128] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:10:46,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 07:10:46,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 75 [2021-08-27 07:10:46,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045112559] [2021-08-27 07:10:46,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-08-27 07:10:46,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:10:46,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-08-27 07:10:46,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=4928, Unknown=5, NotChecked=426, Total=5550 [2021-08-27 07:10:46,707 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand has 75 states, 71 states have (on average 1.8450704225352113) internal successors, (131), 61 states have internal predecessors, (131), 11 states have call successors, (17), 9 states have call predecessors, (17), 14 states have return successors, (15), 14 states have call predecessors, (15), 11 states have call successors, (15) [2021-08-27 07:11:23,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:11:23,527 INFO L93 Difference]: Finished difference Result 127 states and 130 transitions. [2021-08-27 07:11:23,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-27 07:11:23,528 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 71 states have (on average 1.8450704225352113) internal successors, (131), 61 states have internal predecessors, (131), 11 states have call successors, (17), 9 states have call predecessors, (17), 14 states have return successors, (15), 14 states have call predecessors, (15), 11 states have call successors, (15) Word has length 86 [2021-08-27 07:11:23,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:11:23,528 INFO L225 Difference]: With dead ends: 127 [2021-08-27 07:11:23,528 INFO L226 Difference]: Without dead ends: 127 [2021-08-27 07:11:23,529 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 108 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1851 ImplicationChecksByTransitivity, 55639.5ms TimeCoverageRelationStatistics Valid=525, Invalid=10820, Unknown=9, NotChecked=636, Total=11990 [2021-08-27 07:11:23,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-08-27 07:11:23,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 108. [2021-08-27 07:11:23,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 79 states have (on average 1.1518987341772151) internal successors, (91), 89 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) [2021-08-27 07:11:23,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2021-08-27 07:11:23,531 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 86 [2021-08-27 07:11:23,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:11:23,531 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2021-08-27 07:11:23,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 71 states have (on average 1.8450704225352113) internal successors, (131), 61 states have internal predecessors, (131), 11 states have call successors, (17), 9 states have call predecessors, (17), 14 states have return successors, (15), 14 states have call predecessors, (15), 11 states have call successors, (15) [2021-08-27 07:11:23,531 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2021-08-27 07:11:23,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-08-27 07:11:23,531 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:11:23,532 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] [2021-08-27 07:11:23,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-27 07:11:23,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:11:23,732 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting dll_circular_destroyErr0REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-08-27 07:11:23,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:11:23,732 INFO L82 PathProgramCache]: Analyzing trace with hash -485575403, now seen corresponding path program 1 times [2021-08-27 07:11:23,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:11:23,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714695658] [2021-08-27 07:11:23,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:11:23,733 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:11:23,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:11:23,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:11:23,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:11:23,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:11:23,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:11:23,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-08-27 07:11:23,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:11:23,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 07:11:23,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:11:23,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-08-27 07:11:23,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:11:23,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-08-27 07:11:23,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:11:23,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-08-27 07:11:23,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:11:23,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-08-27 07:11:23,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:11:23,832 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-08-27 07:11:23,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:11:23,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714695658] [2021-08-27 07:11:23,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714695658] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:11:23,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631477901] [2021-08-27 07:11:23,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:11:23,833 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:11:23,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:11:23,833 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 07:11:23,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-27 07:11:24,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:11:24,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-27 07:11:24,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:11:24,710 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 [2021-08-27 07:11:25,062 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-08-27 07:11:25,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631477901] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:11:25,063 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-27 07:11:25,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [9] total 17 [2021-08-27 07:11:25,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472032560] [2021-08-27 07:11:25,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-27 07:11:25,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:11:25,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-27 07:11:25,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-08-27 07:11:25,064 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand has 13 states, 12 states have (on average 4.833333333333333) internal successors, (58), 10 states have internal predecessors, (58), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-08-27 07:11:25,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:11:25,332 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2021-08-27 07:11:25,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-27 07:11:25,332 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.833333333333333) internal successors, (58), 10 states have internal predecessors, (58), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 91 [2021-08-27 07:11:25,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:11:25,333 INFO L225 Difference]: With dead ends: 128 [2021-08-27 07:11:25,333 INFO L226 Difference]: Without dead ends: 128 [2021-08-27 07:11:25,333 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 88 SyntacticMatches, 7 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 227.3ms TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-08-27 07:11:25,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-08-27 07:11:25,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 111. [2021-08-27 07:11:25,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 83 states have (on average 1.1686746987951808) internal successors, (97), 92 states have internal predecessors, (97), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-08-27 07:11:25,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 116 transitions. [2021-08-27 07:11:25,335 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 116 transitions. Word has length 91 [2021-08-27 07:11:25,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:11:25,335 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 116 transitions. [2021-08-27 07:11:25,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.833333333333333) internal successors, (58), 10 states have internal predecessors, (58), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-08-27 07:11:25,335 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 116 transitions. [2021-08-27 07:11:25,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-08-27 07:11:25,335 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:11:25,335 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] [2021-08-27 07:11:25,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-27 07:11:25,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-08-27 07:11:25,536 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting dll_circular_destroyErr1REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-08-27 07:11:25,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:11:25,536 INFO L82 PathProgramCache]: Analyzing trace with hash -485575402, now seen corresponding path program 1 times [2021-08-27 07:11:25,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:11:25,536 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873167424] [2021-08-27 07:11:25,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:11:25,536 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:11:25,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:11:25,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:11:25,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:11:25,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:11:25,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:11:25,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-08-27 07:11:25,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:11:25,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 07:11:25,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:11:25,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-08-27 07:11:25,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:11:25,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-08-27 07:11:25,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:11:25,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-08-27 07:11:25,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:11:25,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-08-27 07:11:25,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:11:25,868 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-08-27 07:11:25,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:11:25,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873167424] [2021-08-27 07:11:25,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873167424] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:11:25,869 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:11:25,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-08-27 07:11:25,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887055246] [2021-08-27 07:11:25,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-27 07:11:25,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:11:25,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-27 07:11:25,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-08-27 07:11:25,870 INFO L87 Difference]: Start difference. First operand 111 states and 116 transitions. Second operand has 15 states, 14 states have (on average 4.142857142857143) internal successors, (58), 9 states have internal predecessors, (58), 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) [2021-08-27 07:11:26,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:11:26,440 INFO L93 Difference]: Finished difference Result 122 states and 125 transitions. [2021-08-27 07:11:26,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-27 07:11:26,440 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.142857142857143) internal successors, (58), 9 states have internal predecessors, (58), 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 91 [2021-08-27 07:11:26,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:11:26,441 INFO L225 Difference]: With dead ends: 122 [2021-08-27 07:11:26,441 INFO L226 Difference]: Without dead ends: 122 [2021-08-27 07:11:26,441 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 356.4ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-08-27 07:11:26,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-08-27 07:11:26,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 109. [2021-08-27 07:11:26,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 83 states have (on average 1.1325301204819278) internal successors, (94), 90 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) [2021-08-27 07:11:26,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 113 transitions. [2021-08-27 07:11:26,443 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 113 transitions. Word has length 91 [2021-08-27 07:11:26,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:11:26,443 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 113 transitions. [2021-08-27 07:11:26,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.142857142857143) internal successors, (58), 9 states have internal predecessors, (58), 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) [2021-08-27 07:11:26,443 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 113 transitions. [2021-08-27 07:11:26,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-08-27 07:11:26,444 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:11:26,444 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] [2021-08-27 07:11:26,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-08-27 07:11:26,444 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting dll_circular_destroyErr2REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-08-27 07:11:26,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:11:26,444 INFO L82 PathProgramCache]: Analyzing trace with hash -326841515, now seen corresponding path program 1 times [2021-08-27 07:11:26,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:11:26,444 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835733262] [2021-08-27 07:11:26,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:11:26,444 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:11:26,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:11:26,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:11:26,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:11:26,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:11:26,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:11:26,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-08-27 07:11:26,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:11:26,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 07:11:26,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:11:26,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-08-27 07:11:26,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:11:26,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-08-27 07:11:26,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:11:26,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-08-27 07:11:26,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:11:26,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-08-27 07:11:26,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:11:26,592 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-08-27 07:11:26,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:11:26,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835733262] [2021-08-27 07:11:26,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835733262] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:11:26,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447052694] [2021-08-27 07:11:26,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:11:26,593 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:11:26,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:11:26,595 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 07:11:26,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-27 07:11:27,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:11:27,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 52 conjunts are in the unsatisfiable core [2021-08-27 07:11:27,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:11:27,867 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 [2021-08-27 07:11:27,875 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-08-27 07:11:27,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447052694] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:11:27,875 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 07:11:27,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 24 [2021-08-27 07:11:27,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171511945] [2021-08-27 07:11:27,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-27 07:11:27,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:11:27,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-27 07:11:27,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=548, Unknown=0, NotChecked=0, Total=600 [2021-08-27 07:11:27,877 INFO L87 Difference]: Start difference. First operand 109 states and 113 transitions. Second operand has 25 states, 24 states have (on average 4.125) internal successors, (99), 18 states have internal predecessors, (99), 4 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (12), 6 states have call predecessors, (12), 2 states have call successors, (12) [2021-08-27 07:11:28,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:11:28,794 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2021-08-27 07:11:28,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-27 07:11:28,794 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 4.125) internal successors, (99), 18 states have internal predecessors, (99), 4 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (12), 6 states have call predecessors, (12), 2 states have call successors, (12) Word has length 94 [2021-08-27 07:11:28,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:11:28,795 INFO L225 Difference]: With dead ends: 122 [2021-08-27 07:11:28,795 INFO L226 Difference]: Without dead ends: 122 [2021-08-27 07:11:28,795 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 611.6ms TimeCoverageRelationStatistics Valid=157, Invalid=1325, Unknown=0, NotChecked=0, Total=1482 [2021-08-27 07:11:28,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-08-27 07:11:28,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 109. [2021-08-27 07:11:28,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 84 states have (on average 1.130952380952381) 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) [2021-08-27 07:11:28,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 114 transitions. [2021-08-27 07:11:28,797 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 114 transitions. Word has length 94 [2021-08-27 07:11:28,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:11:28,797 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 114 transitions. [2021-08-27 07:11:28,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 4.125) internal successors, (99), 18 states have internal predecessors, (99), 4 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (12), 6 states have call predecessors, (12), 2 states have call successors, (12) [2021-08-27 07:11:28,798 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 114 transitions. [2021-08-27 07:11:28,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-08-27 07:11:28,798 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:11:28,798 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] [2021-08-27 07:11:28,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-27 07:11:29,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-27 07:11:29,009 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting dll_circular_destroyErr3REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-08-27 07:11:29,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:11:29,009 INFO L82 PathProgramCache]: Analyzing trace with hash -326841514, now seen corresponding path program 1 times [2021-08-27 07:11:29,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:11:29,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189361313] [2021-08-27 07:11:29,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:11:29,009 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:11:29,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:11:29,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:11:29,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:11:29,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:11:29,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:11:29,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-08-27 07:11:29,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:11:29,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 07:11:29,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:11:29,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-08-27 07:11:29,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:11:29,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-08-27 07:11:29,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:11:30,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-08-27 07:11:30,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:11:30,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-08-27 07:11:30,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:11:30,214 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-27 07:11:30,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:11:30,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189361313] [2021-08-27 07:11:30,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189361313] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:11:30,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820666228] [2021-08-27 07:11:30,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:11:30,214 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:11:30,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:11:30,215 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 07:11:30,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-27 07:11:31,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:11:31,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 119 conjunts are in the unsatisfiable core [2021-08-27 07:11:31,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:11:31,179 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 [2021-08-27 07:11:31,569 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 07:11:31,569 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 [2021-08-27 07:11:31,687 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 [2021-08-27 07:11:31,694 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 [2021-08-27 07:11:31,786 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 19 treesize of output 18 [2021-08-27 07:11:31,793 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 19 treesize of output 18 [2021-08-27 07:11:31,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 68 [2021-08-27 07:11:31,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 55 [2021-08-27 07:11:32,077 INFO L354 Elim1Store]: treesize reduction 120, result has 17.8 percent of original size [2021-08-27 07:11:32,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 93 [2021-08-27 07:11:32,102 INFO L354 Elim1Store]: treesize reduction 148, result has 18.7 percent of original size [2021-08-27 07:11:32,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 129 treesize of output 107 [2021-08-27 07:11:33,711 WARN L860 $PredicateComparison]: unable to prove that (exists ((dll_circular_update_at_~head.offset Int)) (let ((.cse0 (+ dll_circular_update_at_~head.offset 8))) (and (<= |c_dll_circular_update_at_#in~head.offset| dll_circular_update_at_~head.offset) (= (store |c_old(#memory_$Pointer$.offset)| |c_dll_circular_update_at_#in~head.base| (store (select |c_old(#memory_$Pointer$.offset)| |c_dll_circular_update_at_#in~head.base|) .cse0 (select (select |c_#memory_$Pointer$.offset| |c_dll_circular_update_at_#in~head.base|) .cse0))) |c_#memory_$Pointer$.offset|) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_dll_circular_update_at_#in~head.base| (store (select |c_old(#memory_$Pointer$.base)| |c_dll_circular_update_at_#in~head.base|) .cse0 (select (select |c_#memory_$Pointer$.base| |c_dll_circular_update_at_#in~head.base|) .cse0))))))) is different from true [2021-08-27 07:11:33,779 INFO L354 Elim1Store]: treesize reduction 188, result has 14.2 percent of original size [2021-08-27 07:11:33,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 166 treesize of output 117 [2021-08-27 07:11:33,817 INFO L354 Elim1Store]: treesize reduction 248, result has 14.8 percent of original size [2021-08-27 07:11:33,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 147 treesize of output 113 [2021-08-27 07:11:34,711 WARN L860 $PredicateComparison]: unable to prove that (exists ((dll_circular_update_at_~head.offset Int)) (= |c_#memory_$Pointer$.offset| (let ((.cse0 (select (select |c_old(#memory_$Pointer$.base)| |c_dll_circular_update_at_#in~head.base|) |c_dll_circular_update_at_#in~head.offset|))) (store |c_old(#memory_$Pointer$.offset)| .cse0 (let ((.cse1 (+ dll_circular_update_at_~head.offset 8))) (store (select |c_old(#memory_$Pointer$.offset)| .cse0) .cse1 (select (select |c_#memory_$Pointer$.offset| .cse0) .cse1))))))) is different from true [2021-08-27 07:11:34,743 INFO L354 Elim1Store]: treesize reduction 102, result has 2.9 percent of original size [2021-08-27 07:11:34,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 156 treesize of output 87 [2021-08-27 07:11:34,783 INFO L354 Elim1Store]: treesize reduction 176, result has 19.6 percent of original size [2021-08-27 07:11:34,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 65 treesize of output 65 [2021-08-27 07:11:47,378 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 71 treesize of output 63 [2021-08-27 07:11:47,384 INFO L354 Elim1Store]: treesize reduction 62, result has 1.6 percent of original size [2021-08-27 07:11:47,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 34 [2021-08-27 07:11:47,511 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 2 not checked. [2021-08-27 07:11:47,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820666228] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:11:47,511 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 07:11:47,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 71 [2021-08-27 07:11:47,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399998512] [2021-08-27 07:11:47,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-08-27 07:11:47,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:11:47,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-08-27 07:11:47,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=4621, Unknown=4, NotChecked=274, Total=5112 [2021-08-27 07:11:47,512 INFO L87 Difference]: Start difference. First operand 109 states and 114 transitions. Second operand has 72 states, 71 states have (on average 2.056338028169014) internal successors, (146), 59 states have internal predecessors, (146), 10 states have call successors, (16), 9 states have call predecessors, (16), 14 states have return successors, (15), 13 states have call predecessors, (15), 8 states have call successors, (15) [2021-08-27 07:12:10,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:12:10,033 INFO L93 Difference]: Finished difference Result 119 states and 122 transitions. [2021-08-27 07:12:10,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-27 07:12:10,034 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 2.056338028169014) internal successors, (146), 59 states have internal predecessors, (146), 10 states have call successors, (16), 9 states have call predecessors, (16), 14 states have return successors, (15), 13 states have call predecessors, (15), 8 states have call successors, (15) Word has length 94 [2021-08-27 07:12:10,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:12:10,035 INFO L225 Difference]: With dead ends: 119 [2021-08-27 07:12:10,035 INFO L226 Difference]: Without dead ends: 119 [2021-08-27 07:12:10,036 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 69 SyntacticMatches, 4 SemanticMatches, 100 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2088 ImplicationChecksByTransitivity, 26047.6ms TimeCoverageRelationStatistics Valid=594, Invalid=9307, Unknown=7, NotChecked=394, Total=10302 [2021-08-27 07:12:10,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-08-27 07:12:10,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 111. [2021-08-27 07:12:10,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 86 states have (on average 1.1162790697674418) internal successors, (96), 92 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) [2021-08-27 07:12:10,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 115 transitions. [2021-08-27 07:12:10,038 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 115 transitions. Word has length 94 [2021-08-27 07:12:10,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:12:10,038 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 115 transitions. [2021-08-27 07:12:10,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 71 states have (on average 2.056338028169014) internal successors, (146), 59 states have internal predecessors, (146), 10 states have call successors, (16), 9 states have call predecessors, (16), 14 states have return successors, (15), 13 states have call predecessors, (15), 8 states have call successors, (15) [2021-08-27 07:12:10,038 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 115 transitions. [2021-08-27 07:12:10,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-08-27 07:12:10,038 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:12:10,039 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] [2021-08-27 07:12:10,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-27 07:12:10,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-27 07:12:10,239 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting mainErr1ENSURES_VIOLATIONMEMORY_LEAK === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-08-27 07:12:10,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:12:10,240 INFO L82 PathProgramCache]: Analyzing trace with hash -294350775, now seen corresponding path program 1 times [2021-08-27 07:12:10,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:12:10,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200823046] [2021-08-27 07:12:10,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:12:10,240 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:12:10,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:12:10,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:12:10,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:12:10,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:12:10,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:12:10,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-08-27 07:12:10,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:12:10,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 07:12:10,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:12:10,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-08-27 07:12:10,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:12:10,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-08-27 07:12:10,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:12:10,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-08-27 07:12:10,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:12:10,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-08-27 07:12:10,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:12:10,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-08-27 07:12:10,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:12:10,450 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-08-27 07:12:10,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:12:10,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200823046] [2021-08-27 07:12:10,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200823046] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:12:10,450 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:12:10,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-08-27 07:12:10,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055261112] [2021-08-27 07:12:10,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-27 07:12:10,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:12:10,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-27 07:12:10,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-08-27 07:12:10,453 INFO L87 Difference]: Start difference. First operand 111 states and 115 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 10 states have internal predecessors, (60), 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) [2021-08-27 07:12:10,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:12:10,894 INFO L93 Difference]: Finished difference Result 117 states and 119 transitions. [2021-08-27 07:12:10,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-27 07:12:10,895 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 10 states have internal predecessors, (60), 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 94 [2021-08-27 07:12:10,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:12:10,895 INFO L225 Difference]: With dead ends: 117 [2021-08-27 07:12:10,895 INFO L226 Difference]: Without dead ends: 115 [2021-08-27 07:12:10,896 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 228.2ms TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-08-27 07:12:10,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-08-27 07:12:10,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2021-08-27 07:12:10,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 86 states have (on average 1.1046511627906976) internal successors, (95), 92 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) [2021-08-27 07:12:10,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 114 transitions. [2021-08-27 07:12:10,898 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 114 transitions. Word has length 94 [2021-08-27 07:12:10,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:12:10,898 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 114 transitions. [2021-08-27 07:12:10,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 10 states have internal predecessors, (60), 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) [2021-08-27 07:12:10,898 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 114 transitions. [2021-08-27 07:12:10,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-08-27 07:12:10,898 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:12:10,898 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] [2021-08-27 07:12:10,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-08-27 07:12:10,899 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting dll_circular_destroyErr8ASSERT_VIOLATIONMEMORY_FREE === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-08-27 07:12:10,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:12:10,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1542153700, now seen corresponding path program 1 times [2021-08-27 07:12:10,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:12:10,899 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760701007] [2021-08-27 07:12:10,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:12:10,899 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:12:10,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:12:10,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:12:10,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:12:10,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:12:10,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:12:11,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-08-27 07:12:11,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:12:11,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 07:12:11,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:12:11,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-08-27 07:12:11,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:12:11,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-08-27 07:12:11,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:12:11,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-08-27 07:12:11,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:12:11,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-08-27 07:12:11,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:12:11,081 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-08-27 07:12:11,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:12:11,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760701007] [2021-08-27 07:12:11,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760701007] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:12:11,081 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:12:11,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-08-27 07:12:11,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260237928] [2021-08-27 07:12:11,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-27 07:12:11,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:12:11,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-27 07:12:11,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-08-27 07:12:11,083 INFO L87 Difference]: Start difference. First operand 111 states and 114 transitions. Second operand has 15 states, 14 states have (on average 4.428571428571429) internal successors, (62), 9 states have internal predecessors, (62), 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) [2021-08-27 07:12:11,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:12:11,590 INFO L93 Difference]: Finished difference Result 113 states and 115 transitions. [2021-08-27 07:12:11,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-27 07:12:11,590 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.428571428571429) internal successors, (62), 9 states have internal predecessors, (62), 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 95 [2021-08-27 07:12:11,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:12:11,591 INFO L225 Difference]: With dead ends: 113 [2021-08-27 07:12:11,591 INFO L226 Difference]: Without dead ends: 113 [2021-08-27 07:12:11,591 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 234.9ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-08-27 07:12:11,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-08-27 07:12:11,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 110. [2021-08-27 07:12:11,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 86 states have (on average 1.0813953488372092) internal successors, (93), 91 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) [2021-08-27 07:12:11,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2021-08-27 07:12:11,594 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 95 [2021-08-27 07:12:11,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:12:11,594 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2021-08-27 07:12:11,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.428571428571429) internal successors, (62), 9 states have internal predecessors, (62), 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) [2021-08-27 07:12:11,594 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2021-08-27 07:12:11,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-08-27 07:12:11,594 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:12:11,595 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, 1, 1] [2021-08-27 07:12:11,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-08-27 07:12:11,595 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting dll_circular_destroyErr5ASSERT_VIOLATIONMEMORY_FREE === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-08-27 07:12:11,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:12:11,595 INFO L82 PathProgramCache]: Analyzing trace with hash -244564319, now seen corresponding path program 1 times [2021-08-27 07:12:11,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:12:11,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850452290] [2021-08-27 07:12:11,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:12:11,595 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:12:11,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:12:11,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:12:11,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:12:11,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:12:11,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:12:12,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-08-27 07:12:12,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:12:12,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 07:12:12,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:12:12,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-08-27 07:12:12,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:12:12,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-08-27 07:12:12,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:12:12,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-08-27 07:12:12,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:12:12,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-08-27 07:12:12,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:12:12,436 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-08-27 07:12:12,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:12:12,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850452290] [2021-08-27 07:12:12,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850452290] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:12:12,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026360214] [2021-08-27 07:12:12,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:12:12,436 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:12:12,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:12:12,437 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 07:12:12,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-27 07:12:13,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:12:13,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 87 conjunts are in the unsatisfiable core [2021-08-27 07:12:13,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:12:13,548 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 [2021-08-27 07:12:13,771 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 9 treesize of output 7 [2021-08-27 07:12:13,885 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 07:12:13,886 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 [2021-08-27 07:12:14,003 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 [2021-08-27 07:12:14,087 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-08-27 07:12:14,087 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 44 treesize of output 30 [2021-08-27 07:12:14,251 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-08-27 07:12:14,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2021-08-27 07:12:14,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 07:12:14,330 INFO L354 Elim1Store]: treesize reduction 49, result has 15.5 percent of original size [2021-08-27 07:12:14,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 39 [2021-08-27 07:12:14,665 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-08-27 07:12:14,665 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 48 treesize of output 23 [2021-08-27 07:12:15,575 WARN L860 $PredicateComparison]: unable to prove that (exists ((dll_circular_update_at_~head.offset Int)) (and (<= |c_dll_circular_update_at_#in~head.offset| dll_circular_update_at_~head.offset) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_dll_circular_update_at_#in~head.base| (let ((.cse0 (+ dll_circular_update_at_~head.offset 8))) (store (select |c_old(#memory_$Pointer$.base)| |c_dll_circular_update_at_#in~head.base|) .cse0 (select (select |c_#memory_$Pointer$.base| |c_dll_circular_update_at_#in~head.base|) .cse0))))))) is different from true [2021-08-27 07:12:15,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 07:12:15,622 INFO L354 Elim1Store]: treesize reduction 128, result has 16.9 percent of original size [2021-08-27 07:12:15,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 45 [2021-08-27 07:12:15,711 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-08-27 07:12:15,712 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 48 treesize of output 23 [2021-08-27 07:12:16,474 WARN L860 $PredicateComparison]: unable to prove that (exists ((dll_circular_update_at_~head.offset Int)) (= (let ((.cse0 (select (select |c_old(#memory_$Pointer$.base)| |c_dll_circular_update_at_#in~head.base|) |c_dll_circular_update_at_#in~head.offset|))) (store |c_old(#memory_$Pointer$.base)| .cse0 (let ((.cse1 (+ dll_circular_update_at_~head.offset 8))) (store (select |c_old(#memory_$Pointer$.base)| .cse0) .cse1 (select (select |c_#memory_$Pointer$.base| .cse0) .cse1))))) |c_#memory_$Pointer$.base|)) is different from true [2021-08-27 07:12:16,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 07:12:16,519 INFO L354 Elim1Store]: treesize reduction 130, result has 19.8 percent of original size [2021-08-27 07:12:16,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 63 [2021-08-27 07:12:23,618 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-27 07:12:23,618 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 46 treesize of output 20 [2021-08-27 07:12:23,691 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 18 trivial. 2 not checked. [2021-08-27 07:12:23,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026360214] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:12:23,691 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 07:12:23,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 55 [2021-08-27 07:12:23,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279432572] [2021-08-27 07:12:23,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-08-27 07:12:23,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:12:23,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-08-27 07:12:23,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=2694, Unknown=2, NotChecked=210, Total=3080 [2021-08-27 07:12:23,692 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand has 56 states, 55 states have (on average 2.272727272727273) internal successors, (125), 43 states have internal predecessors, (125), 8 states have call successors, (16), 9 states have call predecessors, (16), 11 states have return successors, (13), 11 states have call predecessors, (13), 8 states have call successors, (13) [2021-08-27 07:12:31,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:12:31,178 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2021-08-27 07:12:31,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-27 07:12:31,179 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 2.272727272727273) internal successors, (125), 43 states have internal predecessors, (125), 8 states have call successors, (16), 9 states have call predecessors, (16), 11 states have return successors, (13), 11 states have call predecessors, (13), 8 states have call successors, (13) Word has length 97 [2021-08-27 07:12:31,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:12:31,179 INFO L225 Difference]: With dead ends: 114 [2021-08-27 07:12:31,179 INFO L226 Difference]: Without dead ends: 114 [2021-08-27 07:12:31,180 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 79 SyntacticMatches, 7 SemanticMatches, 77 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1248 ImplicationChecksByTransitivity, 13484.0ms TimeCoverageRelationStatistics Valid=476, Invalid=5382, Unknown=2, NotChecked=302, Total=6162 [2021-08-27 07:12:31,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-08-27 07:12:31,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 111. [2021-08-27 07:12:31,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 87 states have (on average 1.0804597701149425) internal successors, (94), 92 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) [2021-08-27 07:12:31,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2021-08-27 07:12:31,183 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 97 [2021-08-27 07:12:31,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:12:31,183 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2021-08-27 07:12:31,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 2.272727272727273) internal successors, (125), 43 states have internal predecessors, (125), 8 states have call successors, (16), 9 states have call predecessors, (16), 11 states have return successors, (13), 11 states have call predecessors, (13), 8 states have call successors, (13) [2021-08-27 07:12:31,183 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2021-08-27 07:12:31,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-08-27 07:12:31,184 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:12:31,184 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, 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] [2021-08-27 07:12:31,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-27 07:12:31,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:12:31,384 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting dll_circular_destroyErr2REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-08-27 07:12:31,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:12:31,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1550879142, now seen corresponding path program 1 times [2021-08-27 07:12:31,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:12:31,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904317236] [2021-08-27 07:12:31,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:12:31,385 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:12:31,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:12:31,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:12:31,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:12:31,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:12:31,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:12:32,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-08-27 07:12:32,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:12:32,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 07:12:32,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:12:32,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-08-27 07:12:32,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:12:32,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-08-27 07:12:32,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:12:32,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-08-27 07:12:32,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:12:32,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-08-27 07:12:32,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:12:32,812 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-08-27 07:12:32,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:12:32,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904317236] [2021-08-27 07:12:32,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904317236] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:12:32,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667096573] [2021-08-27 07:12:32,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:12:32,813 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:12:32,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:12:32,813 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 07:12:32,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-27 07:12:34,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:12:34,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 118 conjunts are in the unsatisfiable core [2021-08-27 07:12:34,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:12:34,065 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 [2021-08-27 07:12:34,498 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-27 07:12:34,498 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 [2021-08-27 07:12:34,645 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 [2021-08-27 07:12:34,752 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 19 treesize of output 18 [2021-08-27 07:12:34,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-08-27 07:12:35,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 07:12:35,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-27 07:12:35,038 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-27 07:12:35,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 57 treesize of output 49 [2021-08-27 07:12:35,424 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-27 07:12:35,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 27 [2021-08-27 07:12:45,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 07:12:45,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-27 07:12:45,525 INFO L354 Elim1Store]: treesize reduction 142, result has 17.9 percent of original size [2021-08-27 07:12:45,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 83 treesize of output 55 [2021-08-27 07:12:45,685 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-27 07:12:45,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 27 [2021-08-27 07:13:08,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 07:13:08,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-27 07:13:08,229 INFO L354 Elim1Store]: treesize reduction 146, result has 22.8 percent of original size [2021-08-27 07:13:08,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 130 treesize of output 108 [2021-08-27 07:13:08,239 INFO L354 Elim1Store]: treesize reduction 47, result has 13.0 percent of original size [2021-08-27 07:13:08,239 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 111 treesize of output 83 [2021-08-27 07:13:17,592 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 51 [2021-08-27 07:13:20,812 INFO L354 Elim1Store]: treesize reduction 48, result has 26.2 percent of original size [2021-08-27 07:13:20,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 70 treesize of output 49 [2021-08-27 07:13:23,319 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-08-27 07:13:23,319 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 21 treesize of output 21 [2021-08-27 07:13:23,402 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 9 refuted. 2 times theorem prover too weak. 17 trivial. 0 not checked. [2021-08-27 07:13:23,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667096573] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:13:23,402 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 07:13:23,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 73 [2021-08-27 07:13:23,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340010588] [2021-08-27 07:13:23,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-08-27 07:13:23,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:13:23,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-08-27 07:13:23,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=4995, Unknown=34, NotChecked=0, Total=5256 [2021-08-27 07:13:23,403 INFO L87 Difference]: Start difference. First operand 111 states and 113 transitions. Second operand has 73 states, 73 states have (on average 1.9589041095890412) internal successors, (143), 59 states have internal predecessors, (143), 8 states have call successors, (17), 10 states have call predecessors, (17), 12 states have return successors, (13), 11 states have call predecessors, (13), 8 states have call successors, (13) [2021-08-27 07:14:12,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:14:12,842 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2021-08-27 07:14:12,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-27 07:14:12,843 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.9589041095890412) internal successors, (143), 59 states have internal predecessors, (143), 8 states have call successors, (17), 10 states have call predecessors, (17), 12 states have return successors, (13), 11 states have call predecessors, (13), 8 states have call successors, (13) Word has length 100 [2021-08-27 07:14:12,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:14:12,843 INFO L225 Difference]: With dead ends: 99 [2021-08-27 07:14:12,843 INFO L226 Difference]: Without dead ends: 99 [2021-08-27 07:14:12,844 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 72 SyntacticMatches, 4 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1842 ImplicationChecksByTransitivity, 64994.6ms TimeCoverageRelationStatistics Valid=616, Invalid=9042, Unknown=44, NotChecked=0, Total=9702 [2021-08-27 07:14:12,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-08-27 07:14:12,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-08-27 07:14:12,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 80 states have (on average 1.0) internal successors, (80), 80 states have internal predecessors, (80), 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) [2021-08-27 07:14:12,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2021-08-27 07:14:12,846 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 100 [2021-08-27 07:14:12,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:14:12,846 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2021-08-27 07:14:12,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.9589041095890412) internal successors, (143), 59 states have internal predecessors, (143), 8 states have call successors, (17), 10 states have call predecessors, (17), 12 states have return successors, (13), 11 states have call predecessors, (13), 8 states have call successors, (13) [2021-08-27 07:14:12,846 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2021-08-27 07:14:12,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-08-27 07:14:12,846 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:14:12,846 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:14:12,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-27 07:14:13,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:14:13,047 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting mainErr1ENSURES_VIOLATIONMEMORY_LEAK === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-08-27 07:14:13,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:14:13,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1760519714, now seen corresponding path program 1 times [2021-08-27 07:14:13,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:14:13,047 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795856558] [2021-08-27 07:14:13,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:14:13,048 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:14:13,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:14:13,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:14:13,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:14:13,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:14:13,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:14:13,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-08-27 07:14:13,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:14:13,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 07:14:13,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:14:13,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-08-27 07:14:13,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:14:13,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-08-27 07:14:13,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:14:14,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-08-27 07:14:14,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:14:14,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-08-27 07:14:14,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:14:14,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-08-27 07:14:14,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:14:14,408 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-08-27 07:14:14,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:14:14,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795856558] [2021-08-27 07:14:14,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795856558] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:14:14,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586352511] [2021-08-27 07:14:14,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:14:14,408 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:14:14,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:14:14,409 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 07:14:14,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-27 07:14:15,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:14:15,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 94 conjunts are in the unsatisfiable core [2021-08-27 07:14:15,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:14:16,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-27 07:14:16,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 07:14:16,234 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 21 treesize of output 20 [2021-08-27 07:14:16,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 07:14:16,382 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-08-27 07:14:16,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2021-08-27 07:14:16,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 07:14:16,450 INFO L354 Elim1Store]: treesize reduction 49, result has 15.5 percent of original size [2021-08-27 07:14:16,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 67 treesize of output 56 [2021-08-27 07:14:16,806 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-08-27 07:14:16,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 39 [2021-08-27 07:14:16,815 INFO L354 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2021-08-27 07:14:16,815 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 31 treesize of output 21 [2021-08-27 07:14:26,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 07:14:26,144 INFO L354 Elim1Store]: treesize reduction 128, result has 16.9 percent of original size [2021-08-27 07:14:26,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 85 treesize of output 62 [2021-08-27 07:14:26,310 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-08-27 07:14:26,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 39 [2021-08-27 07:14:26,322 INFO L354 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2021-08-27 07:14:26,322 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 31 treesize of output 21 [2021-08-27 07:14:38,868 INFO L354 Elim1Store]: treesize reduction 122, result has 19.7 percent of original size [2021-08-27 07:14:38,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 92 treesize of output 78 [2021-08-27 07:14:41,204 INFO L354 Elim1Store]: treesize reduction 41, result has 18.0 percent of original size [2021-08-27 07:14:41,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 40 [2021-08-27 07:14:45,141 INFO L354 Elim1Store]: treesize reduction 41, result has 18.0 percent of original size [2021-08-27 07:14:45,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 40 [2021-08-27 07:14:48,939 INFO L354 Elim1Store]: treesize reduction 41, result has 18.0 percent of original size [2021-08-27 07:14:48,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 40 [2021-08-27 07:14:48,943 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-27 07:14:48,943 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 34 treesize of output 26 [2021-08-27 07:14:55,830 INFO L354 Elim1Store]: treesize reduction 45, result has 21.1 percent of original size [2021-08-27 07:14:55,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 91 treesize of output 66 [2021-08-27 07:14:57,965 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 8 proven. 8 refuted. 2 times theorem prover too weak. 19 trivial. 0 not checked. [2021-08-27 07:14:57,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586352511] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:14:57,965 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 07:14:57,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 65 [2021-08-27 07:14:57,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080068607] [2021-08-27 07:14:57,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-08-27 07:14:57,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:14:57,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-08-27 07:14:57,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=4075, Unknown=25, NotChecked=0, Total=4290 [2021-08-27 07:14:57,967 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand has 66 states, 65 states have (on average 2.2615384615384615) internal successors, (147), 55 states have internal predecessors, (147), 9 states have call successors, (16), 8 states have call predecessors, (16), 13 states have return successors, (15), 13 states have call predecessors, (15), 9 states have call successors, (15) [2021-08-27 07:16:43,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:16:43,669 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2021-08-27 07:16:43,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-27 07:16:43,670 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 2.2615384615384615) internal successors, (147), 55 states have internal predecessors, (147), 9 states have call successors, (16), 8 states have call predecessors, (16), 13 states have return successors, (15), 13 states have call predecessors, (15), 9 states have call successors, (15) Word has length 106 [2021-08-27 07:16:43,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:16:43,670 INFO L225 Difference]: With dead ends: 98 [2021-08-27 07:16:43,670 INFO L226 Difference]: Without dead ends: 0 [2021-08-27 07:16:43,670 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 83 SyntacticMatches, 8 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1813 ImplicationChecksByTransitivity, 93784.0ms TimeCoverageRelationStatistics Valid=525, Invalid=8356, Unknown=49, NotChecked=0, Total=8930 [2021-08-27 07:16:43,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-27 07:16:43,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-27 07:16:43,671 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) [2021-08-27 07:16:43,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-27 07:16:43,671 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 106 [2021-08-27 07:16:43,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:16:43,671 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 07:16:43,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 65 states have (on average 2.2615384615384615) internal successors, (147), 55 states have internal predecessors, (147), 9 states have call successors, (16), 8 states have call predecessors, (16), 13 states have return successors, (15), 13 states have call predecessors, (15), 9 states have call successors, (15) [2021-08-27 07:16:43,671 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-27 07:16:43,671 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-27 07:16:43,673 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr0REQUIRES_VIOLATION [2021-08-27 07:16:43,673 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr1REQUIRES_VIOLATION [2021-08-27 07:16:43,673 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr2REQUIRES_VIOLATION [2021-08-27 07:16:43,673 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr3REQUIRES_VIOLATION [2021-08-27 07:16:43,673 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr4REQUIRES_VIOLATION [2021-08-27 07:16:43,673 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr5REQUIRES_VIOLATION [2021-08-27 07:16:43,673 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr6REQUIRES_VIOLATION [2021-08-27 07:16:43,673 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr7REQUIRES_VIOLATION [2021-08-27 07:16:43,673 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_update_atErr0REQUIRES_VIOLATION [2021-08-27 07:16:43,673 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_update_atErr1REQUIRES_VIOLATION [2021-08-27 07:16:43,673 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_update_atErr2REQUIRES_VIOLATION [2021-08-27 07:16:43,673 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_update_atErr3REQUIRES_VIOLATION [2021-08-27 07:16:43,673 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_get_data_atErr0REQUIRES_VIOLATION [2021-08-27 07:16:43,673 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_get_data_atErr1REQUIRES_VIOLATION [2021-08-27 07:16:43,673 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_get_data_atErr2REQUIRES_VIOLATION [2021-08-27 07:16:43,674 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_get_data_atErr3REQUIRES_VIOLATION [2021-08-27 07:16:43,674 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr0REQUIRES_VIOLATION [2021-08-27 07:16:43,674 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr1REQUIRES_VIOLATION [2021-08-27 07:16:43,674 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr2REQUIRES_VIOLATION [2021-08-27 07:16:43,674 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr3REQUIRES_VIOLATION [2021-08-27 07:16:43,674 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr4REQUIRES_VIOLATION [2021-08-27 07:16:43,674 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr5REQUIRES_VIOLATION [2021-08-27 07:16:43,674 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONMEMORY_LEAK [2021-08-27 07:16:43,674 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1ENSURES_VIOLATIONMEMORY_LEAK [2021-08-27 07:16:43,674 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_destroyErr0REQUIRES_VIOLATION [2021-08-27 07:16:43,674 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_destroyErr1REQUIRES_VIOLATION [2021-08-27 07:16:43,674 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_destroyErr2REQUIRES_VIOLATION [2021-08-27 07:16:43,674 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_destroyErr3REQUIRES_VIOLATION [2021-08-27 07:16:43,674 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_destroyErr4ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 07:16:43,674 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_destroyErr5ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 07:16:43,674 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_destroyErr6ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 07:16:43,674 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_destroyErr7ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 07:16:43,674 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_destroyErr8ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 07:16:43,674 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_destroyErr9ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 07:16:43,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-27 07:16:43,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-08-27 07:16:43,884 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-27 07:16:43,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 07:16:43 BoogieIcfgContainer [2021-08-27 07:16:43,901 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-27 07:16:43,902 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 07:16:43,902 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 07:16:43,902 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 07:16:43,902 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 07:08:16" (3/4) ... [2021-08-27 07:16:43,921 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-27 07:16:43,926 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2021-08-27 07:16:43,926 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-08-27 07:16:43,926 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure myexit [2021-08-27 07:16:43,926 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure dll_circular_destroy [2021-08-27 07:16:43,926 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2021-08-27 07:16:43,927 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2021-08-27 07:16:43,927 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-08-27 07:16:43,927 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure dll_circular_create [2021-08-27 07:16:43,927 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure dll_circular_update_at [2021-08-27 07:16:43,927 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure node_create [2021-08-27 07:16:43,927 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure dll_circular_get_data_at [2021-08-27 07:16:43,933 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 24 nodes and edges [2021-08-27 07:16:43,934 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2021-08-27 07:16:43,934 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-08-27 07:16:43,934 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-27 07:16:43,996 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-27 07:16:43,996 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 07:16:43,997 INFO L168 Benchmark]: Toolchain (without parser) took 508629.21 ms. Allocated memory was 65.0 MB in the beginning and 524.3 MB in the end (delta: 459.3 MB). Free memory was 48.0 MB in the beginning and 239.5 MB in the end (delta: -191.5 MB). Peak memory consumption was 268.6 MB. Max. memory is 16.1 GB. [2021-08-27 07:16:43,997 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 48.2 MB. Free memory was 30.4 MB in the beginning and 30.4 MB in the end (delta: 32.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 07:16:43,997 INFO L168 Benchmark]: CACSL2BoogieTranslator took 404.53 ms. Allocated memory is still 65.0 MB. Free memory was 47.9 MB in the beginning and 40.2 MB in the end (delta: 7.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-27 07:16:43,997 INFO L168 Benchmark]: Boogie Preprocessor took 57.99 ms. Allocated memory is still 65.0 MB. Free memory was 40.2 MB in the beginning and 37.3 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 07:16:43,997 INFO L168 Benchmark]: RCFGBuilder took 585.12 ms. Allocated memory was 65.0 MB in the beginning and 90.2 MB in the end (delta: 25.2 MB). Free memory was 37.3 MB in the beginning and 53.6 MB in the end (delta: -16.4 MB). Peak memory consumption was 14.0 MB. Max. memory is 16.1 GB. [2021-08-27 07:16:43,998 INFO L168 Benchmark]: TraceAbstraction took 507482.12 ms. Allocated memory was 90.2 MB in the beginning and 524.3 MB in the end (delta: 434.1 MB). Free memory was 53.1 MB in the beginning and 244.2 MB in the end (delta: -191.1 MB). Peak memory consumption was 243.5 MB. Max. memory is 16.1 GB. [2021-08-27 07:16:43,998 INFO L168 Benchmark]: Witness Printer took 94.72 ms. Allocated memory is still 524.3 MB. Free memory was 244.2 MB in the beginning and 239.5 MB in the end (delta: 4.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-27 07:16:44,001 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 48.2 MB. Free memory was 30.4 MB in the beginning and 30.4 MB in the end (delta: 32.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 404.53 ms. Allocated memory is still 65.0 MB. Free memory was 47.9 MB in the beginning and 40.2 MB in the end (delta: 7.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 57.99 ms. Allocated memory is still 65.0 MB. Free memory was 40.2 MB in the beginning and 37.3 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 585.12 ms. Allocated memory was 65.0 MB in the beginning and 90.2 MB in the end (delta: 25.2 MB). Free memory was 37.3 MB in the beginning and 53.6 MB in the end (delta: -16.4 MB). Peak memory consumption was 14.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 507482.12 ms. Allocated memory was 90.2 MB in the beginning and 524.3 MB in the end (delta: 434.1 MB). Free memory was 53.1 MB in the beginning and 244.2 MB in the end (delta: -191.1 MB). Peak memory consumption was 243.5 MB. Max. memory is 16.1 GB. * Witness Printer took 94.72 ms. Allocated memory is still 524.3 MB. Free memory was 244.2 MB in the beginning and 239.5 MB in the end (delta: 4.7 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: 590]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 590]: 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: 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: 598]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 598]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 621]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 621]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 624]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 624]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 614]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 614]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 617]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 617]: 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: 581]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 581]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 582]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 582]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 643]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 626]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 603]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 603]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 605]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 605]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 606]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 606]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 606]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 609]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 609]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 609]: free always succeeds For all program executions holds that free always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 12 procedures, 124 locations, 34 error locations. Started 1 CEGAR loops. OverallTime: 507431.8ms, OverallIterations: 42, TraceHistogramMax: 3, EmptinessCheckTime: 27.0ms, AutomataDifference: 301531.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2815 SDtfs, 7892 SDslu, 14329 SDs, 0 SdLazy, 49953 SolverSat, 1810 SolverUnsat, 112 SolverUnknown, 0 SolverNotchecked, 146315.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3110 GetRequests, 1709 SyntacticMatches, 50 SemanticMatches, 1351 ConstructedPredicates, 10 IntricatePredicates, 0 DeprecatedPredicates, 15398 ImplicationChecksByTransitivity, 312360.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=145occurred in iteration=21, InterpolantAutomatonStates: 685, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 182.8ms AutomataMinimizationTime, 42 MinimizatonAttempts, 828 StatesRemovedByMinimization, 38 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 452.0ms SsaConstructionTime, 1537.0ms SatisfiabilityAnalysisTime, 184957.0ms InterpolantComputationTime, 4248 NumberOfCodeBlocks, 4221 NumberOfCodeBlocksAsserted, 70 NumberOfCheckSat, 4181 ConstructedInterpolants, 345 QuantifiedInterpolants, 48500 SizeOfPredicates, 293 NumberOfNonLiveVariables, 9085 ConjunctsInSsa, 1170 ConjunctsInUnsatCore, 67 InterpolantComputations, 23 PerfectInterpolantSequences, 1023/1439 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 34 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-08-27 07:16:44,240 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-08-27 07:16:44,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request...