./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 5fbdf5bf 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-wip.dd.seqcomp-5fbdf5b [2021-08-30 18:24:58,194 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-30 18:24:58,196 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-30 18:24:58,233 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-30 18:24:58,233 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-30 18:24:58,240 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-30 18:24:58,242 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-30 18:24:58,246 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-30 18:24:58,248 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-30 18:24:58,252 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-30 18:24:58,253 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-30 18:24:58,257 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-30 18:24:58,257 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-30 18:24:58,259 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-30 18:24:58,260 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-30 18:24:58,263 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-30 18:24:58,264 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-30 18:24:58,265 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-30 18:24:58,267 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-30 18:24:58,272 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-30 18:24:58,273 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-30 18:24:58,274 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-30 18:24:58,276 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-30 18:24:58,277 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-30 18:24:58,282 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-30 18:24:58,283 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-30 18:24:58,283 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-30 18:24:58,284 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-30 18:24:58,284 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-30 18:24:58,285 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-30 18:24:58,285 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-30 18:24:58,286 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-30 18:24:58,287 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-30 18:24:58,288 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-30 18:24:58,289 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-30 18:24:58,289 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-30 18:24:58,290 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-30 18:24:58,290 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-30 18:24:58,290 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-30 18:24:58,292 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-30 18:24:58,294 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-30 18:24:58,297 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-08-30 18:24:58,327 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-30 18:24:58,327 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-30 18:24:58,328 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-30 18:24:58,329 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-30 18:24:58,330 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-30 18:24:58,330 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-30 18:24:58,330 INFO L138 SettingsManager]: * Use SBE=true [2021-08-30 18:24:58,331 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-30 18:24:58,331 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-30 18:24:58,331 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-30 18:24:58,332 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-30 18:24:58,332 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-30 18:24:58,332 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-30 18:24:58,333 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-30 18:24:58,333 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-30 18:24:58,333 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-30 18:24:58,333 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-30 18:24:58,338 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-30 18:24:58,338 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-30 18:24:58,338 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-30 18:24:58,339 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-30 18:24:58,339 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-30 18:24:58,339 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-30 18:24:58,339 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-30 18:24:58,340 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-30 18:24:58,340 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-30 18:24:58,340 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-30 18:24:58,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-30 18:24:58,340 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-30 18:24:58,340 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 953c2c055895958f6a23bd6cbd577859b914649e [2021-08-30 18:24:58,634 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-30 18:24:58,654 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-30 18:24:58,656 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-30 18:24:58,658 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-30 18:24:58,658 INFO L275 PluginConnector]: CDTParser initialized [2021-08-30 18:24:58,660 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/dll2c_update_all.i [2021-08-30 18:24:58,723 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fbab1ee27/590fdaa0c3154a4eb845a36751174317/FLAG0a320bbd2 [2021-08-30 18:24:59,281 INFO L306 CDTParser]: Found 1 translation units. [2021-08-30 18:24:59,281 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2c_update_all.i [2021-08-30 18:24:59,299 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fbab1ee27/590fdaa0c3154a4eb845a36751174317/FLAG0a320bbd2 [2021-08-30 18:24:59,597 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fbab1ee27/590fdaa0c3154a4eb845a36751174317 [2021-08-30 18:24:59,600 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-30 18:24:59,601 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-30 18:24:59,603 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-30 18:24:59,603 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-30 18:24:59,606 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-30 18:24:59,607 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:24:59" (1/1) ... [2021-08-30 18:24:59,607 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66172fea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:24:59, skipping insertion in model container [2021-08-30 18:24:59,608 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:24:59" (1/1) ... [2021-08-30 18:24:59,613 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-30 18:24:59,654 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-30 18:24:59,908 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] [2021-08-30 18:24:59,913 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-30 18:24:59,924 INFO L203 MainTranslator]: Completed pre-run [2021-08-30 18:24:59,985 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] [2021-08-30 18:24:59,988 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-30 18:25:00,012 INFO L208 MainTranslator]: Completed translation [2021-08-30 18:25:00,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:25:00 WrapperNode [2021-08-30 18:25:00,013 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-30 18:25:00,014 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-30 18:25:00,014 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-30 18:25:00,014 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-30 18:25:00,024 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:25:00" (1/1) ... [2021-08-30 18:25:00,024 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:25:00" (1/1) ... [2021-08-30 18:25:00,045 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:25:00" (1/1) ... [2021-08-30 18:25:00,046 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:25:00" (1/1) ... [2021-08-30 18:25:00,059 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:25:00" (1/1) ... [2021-08-30 18:25:00,063 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:25:00" (1/1) ... [2021-08-30 18:25:00,066 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:25:00" (1/1) ... [2021-08-30 18:25:00,071 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-30 18:25:00,072 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-30 18:25:00,072 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-30 18:25:00,072 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-30 18:25:00,073 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:25:00" (1/1) ... [2021-08-30 18:25:00,083 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-30 18:25:00,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 18:25:00,118 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) [2021-08-30 18:25:00,140 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 [2021-08-30 18:25:00,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-30 18:25:00,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-30 18:25:00,154 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-08-30 18:25:00,154 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-08-30 18:25:00,154 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-08-30 18:25:00,155 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-08-30 18:25:00,155 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-08-30 18:25:00,155 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_create [2021-08-30 18:25:00,156 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_destroy [2021-08-30 18:25:00,156 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_get_data_at [2021-08-30 18:25:00,156 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_update_at [2021-08-30 18:25:00,157 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-30 18:25:00,157 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-08-30 18:25:00,157 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-08-30 18:25:00,157 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-08-30 18:25:00,157 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-08-30 18:25:00,157 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-08-30 18:25:00,158 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-30 18:25:00,158 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-08-30 18:25:00,158 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-08-30 18:25:00,158 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-08-30 18:25:00,158 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-08-30 18:25:00,158 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-08-30 18:25:00,159 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-08-30 18:25:00,159 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-08-30 18:25:00,159 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-08-30 18:25:00,159 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-08-30 18:25:00,159 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-08-30 18:25:00,159 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-08-30 18:25:00,159 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-08-30 18:25:00,160 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-08-30 18:25:00,160 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-08-30 18:25:00,160 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-08-30 18:25:00,160 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-08-30 18:25:00,160 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-08-30 18:25:00,160 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-08-30 18:25:00,161 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-08-30 18:25:00,161 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-08-30 18:25:00,161 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-08-30 18:25:00,161 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-08-30 18:25:00,161 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-08-30 18:25:00,161 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-08-30 18:25:00,162 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-08-30 18:25:00,162 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-08-30 18:25:00,162 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-08-30 18:25:00,162 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-08-30 18:25:00,163 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-08-30 18:25:00,163 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-08-30 18:25:00,164 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-08-30 18:25:00,164 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-08-30 18:25:00,164 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-08-30 18:25:00,164 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-08-30 18:25:00,164 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-08-30 18:25:00,165 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-08-30 18:25:00,165 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-08-30 18:25:00,165 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-08-30 18:25:00,165 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-08-30 18:25:00,165 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-08-30 18:25:00,165 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-08-30 18:25:00,166 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-08-30 18:25:00,166 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-08-30 18:25:00,166 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-08-30 18:25:00,166 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-08-30 18:25:00,166 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-08-30 18:25:00,172 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-08-30 18:25:00,173 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-08-30 18:25:00,173 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-08-30 18:25:00,173 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-08-30 18:25:00,174 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-08-30 18:25:00,174 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-08-30 18:25:00,174 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-08-30 18:25:00,174 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-08-30 18:25:00,175 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-08-30 18:25:00,175 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-08-30 18:25:00,175 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-08-30 18:25:00,175 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-08-30 18:25:00,175 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-08-30 18:25:00,175 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-08-30 18:25:00,176 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-08-30 18:25:00,176 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-08-30 18:25:00,176 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-08-30 18:25:00,176 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-08-30 18:25:00,177 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-08-30 18:25:00,177 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-08-30 18:25:00,177 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-08-30 18:25:00,177 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-08-30 18:25:00,177 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-08-30 18:25:00,177 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-08-30 18:25:00,178 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-08-30 18:25:00,178 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-08-30 18:25:00,178 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-08-30 18:25:00,178 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-08-30 18:25:00,178 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-08-30 18:25:00,178 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-08-30 18:25:00,179 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-08-30 18:25:00,179 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-08-30 18:25:00,179 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-08-30 18:25:00,179 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-08-30 18:25:00,179 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-08-30 18:25:00,179 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-08-30 18:25:00,179 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-08-30 18:25:00,180 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-08-30 18:25:00,180 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-08-30 18:25:00,180 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-08-30 18:25:00,180 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-08-30 18:25:00,181 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-08-30 18:25:00,181 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-08-30 18:25:00,181 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-08-30 18:25:00,181 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-08-30 18:25:00,182 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-08-30 18:25:00,182 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-08-30 18:25:00,182 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-08-30 18:25:00,182 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-08-30 18:25:00,182 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-08-30 18:25:00,183 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-08-30 18:25:00,183 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-08-30 18:25:00,183 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-08-30 18:25:00,183 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-08-30 18:25:00,183 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-08-30 18:25:00,183 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-08-30 18:25:00,183 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-08-30 18:25:00,184 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-08-30 18:25:00,184 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-08-30 18:25:00,184 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-08-30 18:25:00,184 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-30 18:25:00,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-08-30 18:25:00,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-30 18:25:00,186 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_create [2021-08-30 18:25:00,187 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_destroy [2021-08-30 18:25:00,188 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-08-30 18:25:00,188 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-30 18:25:00,188 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_get_data_at [2021-08-30 18:25:00,189 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-30 18:25:00,189 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_update_at [2021-08-30 18:25:00,189 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-30 18:25:00,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-30 18:25:00,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-30 18:25:00,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-30 18:25:00,445 INFO L757 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-08-30 18:25:00,591 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-30 18:25:00,592 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-08-30 18:25:00,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:25:00 BoogieIcfgContainer [2021-08-30 18:25:00,595 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-30 18:25:00,596 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-30 18:25:00,597 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-30 18:25:00,599 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-30 18:25:00,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 06:24:59" (1/3) ... [2021-08-30 18:25:00,600 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d14502f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:25:00, skipping insertion in model container [2021-08-30 18:25:00,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:25:00" (2/3) ... [2021-08-30 18:25:00,600 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d14502f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:25:00, skipping insertion in model container [2021-08-30 18:25:00,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:25:00" (3/3) ... [2021-08-30 18:25:00,602 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2c_update_all.i [2021-08-30 18:25:00,606 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-30 18:25:00,613 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2021-08-30 18:25:00,649 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-30 18:25:00,655 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 [2021-08-30 18:25:00,655 INFO L340 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2021-08-30 18:25:00,669 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) [2021-08-30 18:25:00,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-30 18:25:00,675 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:25:00,676 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 18:25:00,676 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-08-30 18:25:00,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:25:00,681 INFO L82 PathProgramCache]: Analyzing trace with hash 128365921, now seen corresponding path program 1 times [2021-08-30 18:25:00,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:25:00,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49766324] [2021-08-30 18:25:00,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:25:00,690 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:25:00,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:00,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:25:00,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:00,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:25:00,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:25:00,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49766324] [2021-08-30 18:25:00,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49766324] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 18:25:00,971 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:25:00,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-30 18:25:00,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796448535] [2021-08-30 18:25:00,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-30 18:25:00,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:25:01,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-30 18:25:01,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 18:25:01,012 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) [2021-08-30 18:25:01,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:25:01,349 INFO L93 Difference]: Finished difference Result 130 states and 140 transitions. [2021-08-30 18:25:01,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-30 18:25:01,353 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 [2021-08-30 18:25:01,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:25:01,363 INFO L225 Difference]: With dead ends: 130 [2021-08-30 18:25:01,364 INFO L226 Difference]: Without dead ends: 124 [2021-08-30 18:25:01,366 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.36ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 18:25:01,369 INFO L928 BasicCegarLoop]: 18 mSDtfsCounter, 60 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 227.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.96ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 278.95ms IncrementalHoareTripleChecker+Time [2021-08-30 18:25:01,372 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 29 Invalid, 287 Unknown, 0 Unchecked, 9.96ms Time], IncrementalHoareTripleChecker [10 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 278.95ms Time] [2021-08-30 18:25:01,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-08-30 18:25:01,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 105. [2021-08-30 18:25:01,420 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) [2021-08-30 18:25:01,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 113 transitions. [2021-08-30 18:25:01,426 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 113 transitions. Word has length 12 [2021-08-30 18:25:01,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:25:01,427 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 113 transitions. [2021-08-30 18:25:01,428 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) [2021-08-30 18:25:01,428 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 113 transitions. [2021-08-30 18:25:01,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-30 18:25:01,429 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:25:01,429 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 18:25:01,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-30 18:25:01,430 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-08-30 18:25:01,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:25:01,434 INFO L82 PathProgramCache]: Analyzing trace with hash 128365922, now seen corresponding path program 1 times [2021-08-30 18:25:01,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:25:01,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793603285] [2021-08-30 18:25:01,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:25:01,435 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:25:01,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:01,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:25:01,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:01,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:25:01,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:25:01,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793603285] [2021-08-30 18:25:01,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793603285] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 18:25:01,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:25:01,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-30 18:25:01,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283939120] [2021-08-30 18:25:01,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-30 18:25:01,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:25:01,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-30 18:25:01,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 18:25:01,576 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) [2021-08-30 18:25:01,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:25:01,817 INFO L93 Difference]: Finished difference Result 121 states and 130 transitions. [2021-08-30 18:25:01,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-30 18:25:01,818 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 [2021-08-30 18:25:01,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:25:01,824 INFO L225 Difference]: With dead ends: 121 [2021-08-30 18:25:01,824 INFO L226 Difference]: Without dead ends: 121 [2021-08-30 18:25:01,828 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.01ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 18:25:01,830 INFO L928 BasicCegarLoop]: 15 mSDtfsCounter, 54 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 172.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.56ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 214.49ms IncrementalHoareTripleChecker+Time [2021-08-30 18:25:01,830 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 24 Invalid, 268 Unknown, 0 Unchecked, 6.56ms Time], IncrementalHoareTripleChecker [9 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 214.49ms Time] [2021-08-30 18:25:01,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-08-30 18:25:01,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 102. [2021-08-30 18:25:01,848 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) [2021-08-30 18:25:01,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 110 transitions. [2021-08-30 18:25:01,851 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 110 transitions. Word has length 12 [2021-08-30 18:25:01,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:25:01,852 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 110 transitions. [2021-08-30 18:25:01,853 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) [2021-08-30 18:25:01,853 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 110 transitions. [2021-08-30 18:25:01,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-30 18:25:01,854 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:25:01,854 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 18:25:01,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-30 18:25:01,854 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)] === [2021-08-30 18:25:01,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:25:01,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1287918133, now seen corresponding path program 1 times [2021-08-30 18:25:01,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:25:01,860 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708548944] [2021-08-30 18:25:01,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:25:01,861 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:25:01,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:01,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:25:01,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:01,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-08-30 18:25:01,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:02,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:25:02,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:25:02,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708548944] [2021-08-30 18:25:02,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708548944] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 18:25:02,019 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:25:02,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-30 18:25:02,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042004527] [2021-08-30 18:25:02,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-30 18:25:02,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:25:02,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-30 18:25:02,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-30 18:25:02,021 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) [2021-08-30 18:25:02,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:25:02,471 INFO L93 Difference]: Finished difference Result 132 states and 143 transitions. [2021-08-30 18:25:02,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-30 18:25:02,475 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 [2021-08-30 18:25:02,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:25:02,476 INFO L225 Difference]: With dead ends: 132 [2021-08-30 18:25:02,476 INFO L226 Difference]: Without dead ends: 132 [2021-08-30 18:25:02,476 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 147.30ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-08-30 18:25:02,477 INFO L928 BasicCegarLoop]: 15 mSDtfsCounter, 151 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 263.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.83ms SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 314.68ms IncrementalHoareTripleChecker+Time [2021-08-30 18:25:02,478 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 57 Invalid, 504 Unknown, 0 Unchecked, 4.83ms Time], IncrementalHoareTripleChecker [22 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 314.68ms Time] [2021-08-30 18:25:02,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-08-30 18:25:02,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 103. [2021-08-30 18:25:02,485 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) [2021-08-30 18:25:02,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 111 transitions. [2021-08-30 18:25:02,486 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 111 transitions. Word has length 20 [2021-08-30 18:25:02,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:25:02,486 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 111 transitions. [2021-08-30 18:25:02,486 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) [2021-08-30 18:25:02,487 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 111 transitions. [2021-08-30 18:25:02,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-30 18:25:02,487 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:25:02,488 INFO L513 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] [2021-08-30 18:25:02,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-30 18:25:02,488 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)] === [2021-08-30 18:25:02,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:25:02,489 INFO L82 PathProgramCache]: Analyzing trace with hash 60501513, now seen corresponding path program 1 times [2021-08-30 18:25:02,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:25:02,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249442233] [2021-08-30 18:25:02,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:25:02,489 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:25:02,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:02,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:25:02,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:02,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-08-30 18:25:02,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:02,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-08-30 18:25:02,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:02,639 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-30 18:25:02,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:25:02,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249442233] [2021-08-30 18:25:02,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249442233] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 18:25:02,640 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:25:02,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-30 18:25:02,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41881664] [2021-08-30 18:25:02,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-30 18:25:02,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:25:02,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-30 18:25:02,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-30 18:25:02,642 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) [2021-08-30 18:25:03,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:25:03,023 INFO L93 Difference]: Finished difference Result 122 states and 132 transitions. [2021-08-30 18:25:03,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-30 18:25:03,024 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 [2021-08-30 18:25:03,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:25:03,025 INFO L225 Difference]: With dead ends: 122 [2021-08-30 18:25:03,025 INFO L226 Difference]: Without dead ends: 122 [2021-08-30 18:25:03,025 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 70.98ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-30 18:25:03,026 INFO L928 BasicCegarLoop]: 17 mSDtfsCounter, 116 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 275.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.15ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 335.79ms IncrementalHoareTripleChecker+Time [2021-08-30 18:25:03,027 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 47 Invalid, 642 Unknown, 0 Unchecked, 5.15ms Time], IncrementalHoareTripleChecker [15 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 335.79ms Time] [2021-08-30 18:25:03,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-08-30 18:25:03,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 102. [2021-08-30 18:25:03,032 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) [2021-08-30 18:25:03,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 110 transitions. [2021-08-30 18:25:03,033 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 110 transitions. Word has length 30 [2021-08-30 18:25:03,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:25:03,034 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 110 transitions. [2021-08-30 18:25:03,034 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) [2021-08-30 18:25:03,034 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 110 transitions. [2021-08-30 18:25:03,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-30 18:25:03,035 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:25:03,035 INFO L513 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] [2021-08-30 18:25:03,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-30 18:25:03,035 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)] === [2021-08-30 18:25:03,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:25:03,036 INFO L82 PathProgramCache]: Analyzing trace with hash 60501514, now seen corresponding path program 1 times [2021-08-30 18:25:03,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:25:03,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857364254] [2021-08-30 18:25:03,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:25:03,037 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:25:03,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:03,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:25:03,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:03,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-08-30 18:25:03,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:03,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-08-30 18:25:03,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:03,168 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 18:25:03,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:25:03,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857364254] [2021-08-30 18:25:03,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857364254] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 18:25:03,169 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:25:03,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-30 18:25:03,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977845869] [2021-08-30 18:25:03,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-30 18:25:03,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:25:03,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-30 18:25:03,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-30 18:25:03,171 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) [2021-08-30 18:25:03,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:25:03,583 INFO L93 Difference]: Finished difference Result 121 states and 131 transitions. [2021-08-30 18:25:03,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-30 18:25:03,584 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 [2021-08-30 18:25:03,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:25:03,585 INFO L225 Difference]: With dead ends: 121 [2021-08-30 18:25:03,585 INFO L226 Difference]: Without dead ends: 121 [2021-08-30 18:25:03,585 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 71.81ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-30 18:25:03,586 INFO L928 BasicCegarLoop]: 17 mSDtfsCounter, 114 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 283.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.33ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 364.11ms IncrementalHoareTripleChecker+Time [2021-08-30 18:25:03,587 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 47 Invalid, 635 Unknown, 0 Unchecked, 5.33ms Time], IncrementalHoareTripleChecker [14 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 364.11ms Time] [2021-08-30 18:25:03,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-08-30 18:25:03,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 101. [2021-08-30 18:25:03,597 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) [2021-08-30 18:25:03,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 109 transitions. [2021-08-30 18:25:03,598 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 109 transitions. Word has length 30 [2021-08-30 18:25:03,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:25:03,599 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 109 transitions. [2021-08-30 18:25:03,599 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) [2021-08-30 18:25:03,600 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 109 transitions. [2021-08-30 18:25:03,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-30 18:25:03,601 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:25:03,609 INFO L513 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] [2021-08-30 18:25:03,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-30 18:25:03,609 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)] === [2021-08-30 18:25:03,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:25:03,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1987588278, now seen corresponding path program 1 times [2021-08-30 18:25:03,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:25:03,610 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542051948] [2021-08-30 18:25:03,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:25:03,610 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:25:03,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:03,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:25:03,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:03,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-08-30 18:25:03,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:03,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-08-30 18:25:03,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:03,792 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 18:25:03,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:25:03,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542051948] [2021-08-30 18:25:03,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542051948] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 18:25:03,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591497036] [2021-08-30 18:25:03,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:25:03,793 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 18:25:03,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 18:25:03,805 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) [2021-08-30 18:25:03,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-30 18:25:03,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:03,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-30 18:25:03,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 18:25:04,050 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 [2021-08-30 18:25:04,288 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-30 18:25:04,288 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 [2021-08-30 18:25:04,387 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:25:04,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 18:25:04,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591497036] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 18:25:04,452 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-30 18:25:04,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-08-30 18:25:04,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612453625] [2021-08-30 18:25:04,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-30 18:25:04,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:25:04,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-30 18:25:04,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-08-30 18:25:04,454 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) [2021-08-30 18:25:04,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:25:04,865 INFO L93 Difference]: Finished difference Result 125 states and 137 transitions. [2021-08-30 18:25:04,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-30 18:25:04,866 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 [2021-08-30 18:25:04,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:25:04,867 INFO L225 Difference]: With dead ends: 125 [2021-08-30 18:25:04,867 INFO L226 Difference]: Without dead ends: 125 [2021-08-30 18:25:04,868 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 190.29ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-08-30 18:25:04,869 INFO L928 BasicCegarLoop]: 14 mSDtfsCounter, 145 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 274.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.62ms SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 169 IncrementalHoareTripleChecker+Unchecked, 339.55ms IncrementalHoareTripleChecker+Time [2021-08-30 18:25:04,869 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 47 Invalid, 841 Unknown, 0 Unchecked, 7.62ms Time], IncrementalHoareTripleChecker [28 Valid, 644 Invalid, 0 Unknown, 169 Unchecked, 339.55ms Time] [2021-08-30 18:25:04,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-08-30 18:25:04,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 106. [2021-08-30 18:25:04,873 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) [2021-08-30 18:25:04,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 117 transitions. [2021-08-30 18:25:04,874 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 117 transitions. Word has length 32 [2021-08-30 18:25:04,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:25:04,874 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 117 transitions. [2021-08-30 18:25:04,875 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) [2021-08-30 18:25:04,875 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 117 transitions. [2021-08-30 18:25:04,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-30 18:25:04,875 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:25:04,875 INFO L513 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] [2021-08-30 18:25:04,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-30 18:25:05,076 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 [2021-08-30 18:25:05,076 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)] === [2021-08-30 18:25:05,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:25:05,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1987588277, now seen corresponding path program 1 times [2021-08-30 18:25:05,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:25:05,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78538919] [2021-08-30 18:25:05,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:25:05,077 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:25:05,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:05,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:25:05,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:05,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-08-30 18:25:05,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:05,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-08-30 18:25:05,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:05,315 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 18:25:05,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:25:05,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78538919] [2021-08-30 18:25:05,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78538919] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 18:25:05,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844833300] [2021-08-30 18:25:05,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:25:05,318 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 18:25:05,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 18:25:05,325 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) [2021-08-30 18:25:05,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-30 18:25:05,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:05,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-30 18:25:05,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 18:25:05,517 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 [2021-08-30 18:25:05,776 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-30 18:25:05,777 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 [2021-08-30 18:25:05,806 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-30 18:25:05,806 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 [2021-08-30 18:25:05,875 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:25:05,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 18:25:05,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844833300] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 18:25:05,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-30 18:25:05,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2021-08-30 18:25:05,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855144227] [2021-08-30 18:25:05,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-30 18:25:05,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:25:05,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-30 18:25:05,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-08-30 18:25:05,987 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) [2021-08-30 18:25:06,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:25:06,650 INFO L93 Difference]: Finished difference Result 125 states and 136 transitions. [2021-08-30 18:25:06,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-30 18:25:06,651 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 [2021-08-30 18:25:06,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:25:06,652 INFO L225 Difference]: With dead ends: 125 [2021-08-30 18:25:06,652 INFO L226 Difference]: Without dead ends: 125 [2021-08-30 18:25:06,653 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 349.82ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-08-30 18:25:06,653 INFO L928 BasicCegarLoop]: 14 mSDtfsCounter, 115 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 1004 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 450.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 1252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.46ms SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 227 IncrementalHoareTripleChecker+Unchecked, 548.63ms IncrementalHoareTripleChecker+Time [2021-08-30 18:25:06,654 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 82 Invalid, 1252 Unknown, 0 Unchecked, 8.46ms Time], IncrementalHoareTripleChecker [21 Valid, 1004 Invalid, 0 Unknown, 227 Unchecked, 548.63ms Time] [2021-08-30 18:25:06,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-08-30 18:25:06,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 106. [2021-08-30 18:25:06,658 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) [2021-08-30 18:25:06,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 116 transitions. [2021-08-30 18:25:06,659 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 116 transitions. Word has length 32 [2021-08-30 18:25:06,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:25:06,660 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 116 transitions. [2021-08-30 18:25:06,660 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) [2021-08-30 18:25:06,660 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 116 transitions. [2021-08-30 18:25:06,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-30 18:25:06,661 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:25:06,661 INFO L513 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] [2021-08-30 18:25:06,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-30 18:25:06,861 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 [2021-08-30 18:25:06,862 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)] === [2021-08-30 18:25:06,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:25:06,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1188265856, now seen corresponding path program 1 times [2021-08-30 18:25:06,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:25:06,863 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202356938] [2021-08-30 18:25:06,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:25:06,863 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:25:06,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:06,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:25:06,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:06,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-08-30 18:25:06,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:06,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-08-30 18:25:06,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:06,949 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 18:25:06,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:25:06,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202356938] [2021-08-30 18:25:06,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202356938] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 18:25:06,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541438669] [2021-08-30 18:25:06,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:25:06,950 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 18:25:06,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 18:25:06,951 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) [2021-08-30 18:25:06,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-30 18:25:07,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:07,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-30 18:25:07,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 18:25:07,123 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 18:25:07,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 18:25:07,202 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 18:25:07,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541438669] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 18:25:07,203 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 18:25:07,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 8 [2021-08-30 18:25:07,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769919374] [2021-08-30 18:25:07,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-30 18:25:07,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:25:07,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-30 18:25:07,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-30 18:25:07,205 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) [2021-08-30 18:25:07,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:25:07,552 INFO L93 Difference]: Finished difference Result 126 states and 136 transitions. [2021-08-30 18:25:07,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-30 18:25:07,553 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 [2021-08-30 18:25:07,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:25:07,554 INFO L225 Difference]: With dead ends: 126 [2021-08-30 18:25:07,554 INFO L226 Difference]: Without dead ends: 126 [2021-08-30 18:25:07,554 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 59.34ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-30 18:25:07,554 INFO L928 BasicCegarLoop]: 16 mSDtfsCounter, 99 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 243.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.05ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 301.95ms IncrementalHoareTripleChecker+Time [2021-08-30 18:25:07,555 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 84 Invalid, 605 Unknown, 0 Unchecked, 6.05ms Time], IncrementalHoareTripleChecker [16 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 301.95ms Time] [2021-08-30 18:25:07,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-08-30 18:25:07,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 106. [2021-08-30 18:25:07,559 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) [2021-08-30 18:25:07,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 115 transitions. [2021-08-30 18:25:07,560 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 115 transitions. Word has length 34 [2021-08-30 18:25:07,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:25:07,560 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 115 transitions. [2021-08-30 18:25:07,560 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) [2021-08-30 18:25:07,560 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 115 transitions. [2021-08-30 18:25:07,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-30 18:25:07,561 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:25:07,561 INFO L513 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] [2021-08-30 18:25:07,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-30 18:25:07,772 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 [2021-08-30 18:25:07,773 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)] === [2021-08-30 18:25:07,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:25:07,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1823244786, now seen corresponding path program 1 times [2021-08-30 18:25:07,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:25:07,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307325348] [2021-08-30 18:25:07,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:25:07,774 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:25:07,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:07,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:25:07,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:07,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-08-30 18:25:07,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:07,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-08-30 18:25:07,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:07,868 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-30 18:25:07,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:25:07,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307325348] [2021-08-30 18:25:07,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307325348] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 18:25:07,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695744841] [2021-08-30 18:25:07,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:25:07,869 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 18:25:07,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 18:25:07,877 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) [2021-08-30 18:25:07,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-30 18:25:07,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:07,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-30 18:25:07,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 18:25:08,046 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-30 18:25:08,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 18:25:08,060 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-30 18:25:08,061 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 12 treesize of output 11 [2021-08-30 18:25:08,114 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-30 18:25:08,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695744841] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 18:25:08,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 18:25:08,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 3] total 6 [2021-08-30 18:25:08,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001187870] [2021-08-30 18:25:08,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-30 18:25:08,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:25:08,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-30 18:25:08,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-30 18:25:08,116 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) [2021-08-30 18:25:08,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:25:08,428 INFO L93 Difference]: Finished difference Result 130 states and 142 transitions. [2021-08-30 18:25:08,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-30 18:25:08,428 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 [2021-08-30 18:25:08,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:25:08,429 INFO L225 Difference]: With dead ends: 130 [2021-08-30 18:25:08,430 INFO L226 Difference]: Without dead ends: 130 [2021-08-30 18:25:08,430 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 67.49ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-08-30 18:25:08,430 INFO L928 BasicCegarLoop]: 18 mSDtfsCounter, 108 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 219.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.87ms SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 261.40ms IncrementalHoareTripleChecker+Time [2021-08-30 18:25:08,430 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 44 Invalid, 447 Unknown, 0 Unchecked, 2.87ms Time], IncrementalHoareTripleChecker [21 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 261.40ms Time] [2021-08-30 18:25:08,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-08-30 18:25:08,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 109. [2021-08-30 18:25:08,434 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) [2021-08-30 18:25:08,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 120 transitions. [2021-08-30 18:25:08,434 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 120 transitions. Word has length 35 [2021-08-30 18:25:08,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:25:08,435 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 120 transitions. [2021-08-30 18:25:08,435 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) [2021-08-30 18:25:08,435 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 120 transitions. [2021-08-30 18:25:08,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-30 18:25:08,436 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:25:08,436 INFO L513 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] [2021-08-30 18:25:08,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-30 18:25:08,648 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 [2021-08-30 18:25:08,649 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)] === [2021-08-30 18:25:08,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:25:08,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1823244785, now seen corresponding path program 1 times [2021-08-30 18:25:08,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:25:08,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906539265] [2021-08-30 18:25:08,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:25:08,649 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:25:08,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:08,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:25:08,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:08,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-08-30 18:25:08,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:08,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-08-30 18:25:08,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:08,780 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 18:25:08,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:25:08,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906539265] [2021-08-30 18:25:08,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906539265] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 18:25:08,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623959715] [2021-08-30 18:25:08,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:25:08,782 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 18:25:08,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 18:25:08,785 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) [2021-08-30 18:25:08,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-30 18:25:08,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:08,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-30 18:25:08,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 18:25:09,096 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 18:25:09,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 18:25:09,141 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 18:25:09,141 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 19 treesize of output 23 [2021-08-30 18:25:09,337 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 18:25:09,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623959715] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 18:25:09,338 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 18:25:09,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 16 [2021-08-30 18:25:09,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338925767] [2021-08-30 18:25:09,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-30 18:25:09,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:25:09,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-30 18:25:09,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-08-30 18:25:09,340 INFO L87 Difference]: Start difference. First operand 109 states and 120 transitions. Second operand has 17 states, 16 states have (on average 3.375) internal successors, (54), 13 states have internal predecessors, (54), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-08-30 18:25:09,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:25:09,884 INFO L93 Difference]: Finished difference Result 135 states and 147 transitions. [2021-08-30 18:25:09,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-30 18:25:09,884 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.375) internal successors, (54), 13 states have internal predecessors, (54), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 35 [2021-08-30 18:25:09,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:25:09,885 INFO L225 Difference]: With dead ends: 135 [2021-08-30 18:25:09,886 INFO L226 Difference]: Without dead ends: 135 [2021-08-30 18:25:09,886 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 191.84ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-08-30 18:25:09,886 INFO L928 BasicCegarLoop]: 18 mSDtfsCounter, 117 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 993 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 382.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 1013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.81ms SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 475.25ms IncrementalHoareTripleChecker+Time [2021-08-30 18:25:09,887 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 138 Invalid, 1013 Unknown, 0 Unchecked, 5.81ms Time], IncrementalHoareTripleChecker [20 Valid, 993 Invalid, 0 Unknown, 0 Unchecked, 475.25ms Time] [2021-08-30 18:25:09,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-08-30 18:25:09,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 109. [2021-08-30 18:25:09,890 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) [2021-08-30 18:25:09,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 119 transitions. [2021-08-30 18:25:09,890 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 119 transitions. Word has length 35 [2021-08-30 18:25:09,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:25:09,890 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 119 transitions. [2021-08-30 18:25:09,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.375) internal successors, (54), 13 states have internal predecessors, (54), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-08-30 18:25:09,891 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 119 transitions. [2021-08-30 18:25:09,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-30 18:25:09,891 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:25:09,892 INFO L513 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] [2021-08-30 18:25:09,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-30 18:25:10,104 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 [2021-08-30 18:25:10,105 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)] === [2021-08-30 18:25:10,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:25:10,105 INFO L82 PathProgramCache]: Analyzing trace with hash -686013508, now seen corresponding path program 1 times [2021-08-30 18:25:10,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:25:10,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650189564] [2021-08-30 18:25:10,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:25:10,106 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:25:10,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:10,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:25:10,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:10,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-08-30 18:25:10,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:10,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-08-30 18:25:10,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:10,219 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-30 18:25:10,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:25:10,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650189564] [2021-08-30 18:25:10,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650189564] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 18:25:10,220 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:25:10,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-30 18:25:10,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824113515] [2021-08-30 18:25:10,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-30 18:25:10,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:25:10,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-30 18:25:10,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-30 18:25:10,225 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) [2021-08-30 18:25:10,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:25:10,624 INFO L93 Difference]: Finished difference Result 128 states and 139 transitions. [2021-08-30 18:25:10,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-30 18:25:10,625 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 [2021-08-30 18:25:10,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:25:10,626 INFO L225 Difference]: With dead ends: 128 [2021-08-30 18:25:10,626 INFO L226 Difference]: Without dead ends: 128 [2021-08-30 18:25:10,627 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 73.34ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-08-30 18:25:10,627 INFO L928 BasicCegarLoop]: 17 mSDtfsCounter, 118 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 287.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.36ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 349.13ms IncrementalHoareTripleChecker+Time [2021-08-30 18:25:10,627 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 54 Invalid, 724 Unknown, 0 Unchecked, 4.36ms Time], IncrementalHoareTripleChecker [17 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 349.13ms Time] [2021-08-30 18:25:10,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-08-30 18:25:10,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 108. [2021-08-30 18:25:10,630 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) [2021-08-30 18:25:10,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 118 transitions. [2021-08-30 18:25:10,631 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 118 transitions. Word has length 36 [2021-08-30 18:25:10,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:25:10,631 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 118 transitions. [2021-08-30 18:25:10,631 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) [2021-08-30 18:25:10,631 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 118 transitions. [2021-08-30 18:25:10,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-30 18:25:10,632 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:25:10,632 INFO L513 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] [2021-08-30 18:25:10,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-30 18:25:10,632 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)] === [2021-08-30 18:25:10,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:25:10,633 INFO L82 PathProgramCache]: Analyzing trace with hash -686013507, now seen corresponding path program 1 times [2021-08-30 18:25:10,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:25:10,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566572725] [2021-08-30 18:25:10,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:25:10,633 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:25:10,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:10,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:25:10,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:10,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-08-30 18:25:10,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:10,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-08-30 18:25:10,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:10,752 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 18:25:10,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:25:10,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566572725] [2021-08-30 18:25:10,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566572725] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 18:25:10,753 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:25:10,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-30 18:25:10,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690526360] [2021-08-30 18:25:10,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-30 18:25:10,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:25:10,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-30 18:25:10,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-30 18:25:10,755 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) [2021-08-30 18:25:11,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:25:11,170 INFO L93 Difference]: Finished difference Result 126 states and 137 transitions. [2021-08-30 18:25:11,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-30 18:25:11,171 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 [2021-08-30 18:25:11,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:25:11,172 INFO L225 Difference]: With dead ends: 126 [2021-08-30 18:25:11,172 INFO L226 Difference]: Without dead ends: 126 [2021-08-30 18:25:11,172 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 84.45ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-08-30 18:25:11,173 INFO L928 BasicCegarLoop]: 17 mSDtfsCounter, 115 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 295.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.35ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 365.02ms IncrementalHoareTripleChecker+Time [2021-08-30 18:25:11,173 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 54 Invalid, 716 Unknown, 0 Unchecked, 4.35ms Time], IncrementalHoareTripleChecker [14 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 365.02ms Time] [2021-08-30 18:25:11,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-08-30 18:25:11,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 107. [2021-08-30 18:25:11,176 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) [2021-08-30 18:25:11,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 117 transitions. [2021-08-30 18:25:11,177 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 117 transitions. Word has length 36 [2021-08-30 18:25:11,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:25:11,177 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 117 transitions. [2021-08-30 18:25:11,177 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) [2021-08-30 18:25:11,177 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 117 transitions. [2021-08-30 18:25:11,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-30 18:25:11,178 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:25:11,178 INFO L513 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] [2021-08-30 18:25:11,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-30 18:25:11,178 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)] === [2021-08-30 18:25:11,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:25:11,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1949112644, now seen corresponding path program 1 times [2021-08-30 18:25:11,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:25:11,179 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360231126] [2021-08-30 18:25:11,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:25:11,179 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:25:11,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:11,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:25:11,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:11,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 18:25:11,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:11,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-08-30 18:25:11,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:11,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-30 18:25:11,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:11,470 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 18:25:11,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:25:11,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360231126] [2021-08-30 18:25:11,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360231126] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 18:25:11,471 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:25:11,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-08-30 18:25:11,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782325929] [2021-08-30 18:25:11,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-30 18:25:11,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:25:11,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-30 18:25:11,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-08-30 18:25:11,472 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) [2021-08-30 18:25:12,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:25:12,214 INFO L93 Difference]: Finished difference Result 134 states and 146 transitions. [2021-08-30 18:25:12,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-30 18:25:12,214 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 [2021-08-30 18:25:12,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:25:12,216 INFO L225 Difference]: With dead ends: 134 [2021-08-30 18:25:12,216 INFO L226 Difference]: Without dead ends: 134 [2021-08-30 18:25:12,216 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 280.87ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-08-30 18:25:12,218 INFO L928 BasicCegarLoop]: 14 mSDtfsCounter, 161 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 1212 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 448.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 1230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.00ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 549.01ms IncrementalHoareTripleChecker+Time [2021-08-30 18:25:12,219 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 56 Invalid, 1230 Unknown, 0 Unchecked, 6.00ms Time], IncrementalHoareTripleChecker [18 Valid, 1212 Invalid, 0 Unknown, 0 Unchecked, 549.01ms Time] [2021-08-30 18:25:12,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-08-30 18:25:12,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 110. [2021-08-30 18:25:12,224 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) [2021-08-30 18:25:12,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 123 transitions. [2021-08-30 18:25:12,225 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 123 transitions. Word has length 45 [2021-08-30 18:25:12,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:25:12,226 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 123 transitions. [2021-08-30 18:25:12,226 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) [2021-08-30 18:25:12,226 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 123 transitions. [2021-08-30 18:25:12,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-30 18:25:12,228 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:25:12,228 INFO L513 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] [2021-08-30 18:25:12,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-30 18:25:12,229 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)] === [2021-08-30 18:25:12,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:25:12,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1949112643, now seen corresponding path program 1 times [2021-08-30 18:25:12,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:25:12,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918027553] [2021-08-30 18:25:12,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:25:12,230 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:25:12,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:12,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:25:12,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:12,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 18:25:12,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:12,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-08-30 18:25:12,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:12,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-30 18:25:12,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:12,392 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-30 18:25:12,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:25:12,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918027553] [2021-08-30 18:25:12,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918027553] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 18:25:12,393 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:25:12,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-08-30 18:25:12,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665509231] [2021-08-30 18:25:12,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-30 18:25:12,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:25:12,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-30 18:25:12,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-08-30 18:25:12,396 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) [2021-08-30 18:25:13,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:25:13,001 INFO L93 Difference]: Finished difference Result 133 states and 144 transitions. [2021-08-30 18:25:13,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-30 18:25:13,001 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 [2021-08-30 18:25:13,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:25:13,002 INFO L225 Difference]: With dead ends: 133 [2021-08-30 18:25:13,002 INFO L226 Difference]: Without dead ends: 133 [2021-08-30 18:25:13,003 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 174.68ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-08-30 18:25:13,003 INFO L928 BasicCegarLoop]: 14 mSDtfsCounter, 149 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 1211 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 391.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 1235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.45ms SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 483.62ms IncrementalHoareTripleChecker+Time [2021-08-30 18:25:13,003 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 56 Invalid, 1235 Unknown, 0 Unchecked, 5.45ms Time], IncrementalHoareTripleChecker [24 Valid, 1211 Invalid, 0 Unknown, 0 Unchecked, 483.62ms Time] [2021-08-30 18:25:13,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-08-30 18:25:13,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 110. [2021-08-30 18:25:13,006 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) [2021-08-30 18:25:13,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2021-08-30 18:25:13,007 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 45 [2021-08-30 18:25:13,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:25:13,007 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2021-08-30 18:25:13,007 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) [2021-08-30 18:25:13,007 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2021-08-30 18:25:13,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-30 18:25:13,008 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:25:13,008 INFO L513 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] [2021-08-30 18:25:13,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-08-30 18:25:13,009 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)] === [2021-08-30 18:25:13,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:25:13,009 INFO L82 PathProgramCache]: Analyzing trace with hash 812961645, now seen corresponding path program 1 times [2021-08-30 18:25:13,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:25:13,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196467082] [2021-08-30 18:25:13,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:25:13,009 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:25:13,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:13,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:25:13,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:13,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 18:25:13,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:13,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-08-30 18:25:13,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:13,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-30 18:25:13,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:13,091 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-30 18:25:13,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:25:13,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196467082] [2021-08-30 18:25:13,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196467082] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 18:25:13,091 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:25:13,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-30 18:25:13,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190359659] [2021-08-30 18:25:13,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-30 18:25:13,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:25:13,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-30 18:25:13,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-30 18:25:13,093 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) [2021-08-30 18:25:13,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:25:13,385 INFO L93 Difference]: Finished difference Result 139 states and 153 transitions. [2021-08-30 18:25:13,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-30 18:25:13,385 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 [2021-08-30 18:25:13,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:25:13,386 INFO L225 Difference]: With dead ends: 139 [2021-08-30 18:25:13,386 INFO L226 Difference]: Without dead ends: 139 [2021-08-30 18:25:13,387 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 52.40ms TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-08-30 18:25:13,387 INFO L928 BasicCegarLoop]: 17 mSDtfsCounter, 114 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 194.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.74ms SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 250.03ms IncrementalHoareTripleChecker+Time [2021-08-30 18:25:13,387 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 43 Invalid, 415 Unknown, 0 Unchecked, 2.74ms Time], IncrementalHoareTripleChecker [21 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 250.03ms Time] [2021-08-30 18:25:13,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-08-30 18:25:13,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 112. [2021-08-30 18:25:13,391 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) [2021-08-30 18:25:13,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 123 transitions. [2021-08-30 18:25:13,392 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 123 transitions. Word has length 47 [2021-08-30 18:25:13,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:25:13,392 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 123 transitions. [2021-08-30 18:25:13,392 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) [2021-08-30 18:25:13,392 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 123 transitions. [2021-08-30 18:25:13,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-30 18:25:13,395 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:25:13,396 INFO L513 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] [2021-08-30 18:25:13,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-08-30 18:25:13,396 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)] === [2021-08-30 18:25:13,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:25:13,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1650408867, now seen corresponding path program 1 times [2021-08-30 18:25:13,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:25:13,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006370108] [2021-08-30 18:25:13,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:25:13,397 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:25:13,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:13,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:25:13,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:13,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-08-30 18:25:13,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:13,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-08-30 18:25:13,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:13,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-08-30 18:25:13,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:13,503 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-08-30 18:25:13,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:25:13,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006370108] [2021-08-30 18:25:13,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006370108] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 18:25:13,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924922174] [2021-08-30 18:25:13,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:25:13,504 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 18:25:13,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 18:25:13,509 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) [2021-08-30 18:25:13,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-30 18:25:13,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:13,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-30 18:25:13,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 18:25:13,735 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-30 18:25:13,735 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-30 18:25:13,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924922174] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 18:25:13,735 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-30 18:25:13,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2021-08-30 18:25:13,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127069717] [2021-08-30 18:25:13,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-30 18:25:13,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:25:13,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-30 18:25:13,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-08-30 18:25:13,737 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) [2021-08-30 18:25:13,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:25:13,892 INFO L93 Difference]: Finished difference Result 100 states and 107 transitions. [2021-08-30 18:25:13,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-30 18:25:13,892 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 [2021-08-30 18:25:13,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:25:13,893 INFO L225 Difference]: With dead ends: 100 [2021-08-30 18:25:13,893 INFO L226 Difference]: Without dead ends: 100 [2021-08-30 18:25:13,893 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 61.02ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-30 18:25:13,894 INFO L928 BasicCegarLoop]: 14 mSDtfsCounter, 31 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 106.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.25ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 135.33ms IncrementalHoareTripleChecker+Time [2021-08-30 18:25:13,894 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 60 Invalid, 393 Unknown, 0 Unchecked, 1.25ms Time], IncrementalHoareTripleChecker [4 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 135.33ms Time] [2021-08-30 18:25:13,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-08-30 18:25:13,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2021-08-30 18:25:13,897 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) [2021-08-30 18:25:13,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 107 transitions. [2021-08-30 18:25:13,897 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 107 transitions. Word has length 47 [2021-08-30 18:25:13,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:25:13,897 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 107 transitions. [2021-08-30 18:25:13,898 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) [2021-08-30 18:25:13,898 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 107 transitions. [2021-08-30 18:25:13,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-30 18:25:13,898 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:25:13,898 INFO L513 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] [2021-08-30 18:25:13,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-30 18:25:14,112 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 [2021-08-30 18:25:14,113 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)] === [2021-08-30 18:25:14,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:25:14,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1941428179, now seen corresponding path program 1 times [2021-08-30 18:25:14,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:25:14,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250949914] [2021-08-30 18:25:14,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:25:14,114 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:25:14,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:14,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:25:14,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:14,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 18:25:14,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:14,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-08-30 18:25:14,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:14,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-30 18:25:14,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:14,201 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-30 18:25:14,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:25:14,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250949914] [2021-08-30 18:25:14,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250949914] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 18:25:14,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:25:14,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-30 18:25:14,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772614895] [2021-08-30 18:25:14,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-30 18:25:14,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:25:14,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-30 18:25:14,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-30 18:25:14,204 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) [2021-08-30 18:25:14,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:25:14,551 INFO L93 Difference]: Finished difference Result 132 states and 141 transitions. [2021-08-30 18:25:14,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-30 18:25:14,552 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 [2021-08-30 18:25:14,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:25:14,552 INFO L225 Difference]: With dead ends: 132 [2021-08-30 18:25:14,553 INFO L226 Difference]: Without dead ends: 132 [2021-08-30 18:25:14,553 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 95.45ms TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-08-30 18:25:14,553 INFO L928 BasicCegarLoop]: 16 mSDtfsCounter, 110 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 214.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.81ms SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 260.45ms IncrementalHoareTripleChecker+Time [2021-08-30 18:25:14,554 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 66 Invalid, 491 Unknown, 0 Unchecked, 2.81ms Time], IncrementalHoareTripleChecker [21 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 260.45ms Time] [2021-08-30 18:25:14,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-08-30 18:25:14,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 106. [2021-08-30 18:25:14,557 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) [2021-08-30 18:25:14,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 113 transitions. [2021-08-30 18:25:14,557 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 113 transitions. Word has length 48 [2021-08-30 18:25:14,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:25:14,558 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 113 transitions. [2021-08-30 18:25:14,558 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) [2021-08-30 18:25:14,558 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 113 transitions. [2021-08-30 18:25:14,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-30 18:25:14,558 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:25:14,559 INFO L513 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] [2021-08-30 18:25:14,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-08-30 18:25:14,559 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)] === [2021-08-30 18:25:14,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:25:14,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1934169815, now seen corresponding path program 1 times [2021-08-30 18:25:14,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:25:14,559 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875164526] [2021-08-30 18:25:14,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:25:14,560 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:25:14,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:14,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:25:14,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:14,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 18:25:14,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:14,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-08-30 18:25:14,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:14,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-30 18:25:14,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:14,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-08-30 18:25:14,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:14,725 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-30 18:25:14,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:25:14,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875164526] [2021-08-30 18:25:14,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875164526] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 18:25:14,725 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:25:14,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-08-30 18:25:14,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745707275] [2021-08-30 18:25:14,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-30 18:25:14,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:25:14,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-30 18:25:14,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-08-30 18:25:14,728 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) [2021-08-30 18:25:15,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:25:15,304 INFO L93 Difference]: Finished difference Result 133 states and 141 transitions. [2021-08-30 18:25:15,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-30 18:25:15,305 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 [2021-08-30 18:25:15,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:25:15,307 INFO L225 Difference]: With dead ends: 133 [2021-08-30 18:25:15,307 INFO L226 Difference]: Without dead ends: 133 [2021-08-30 18:25:15,308 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 183.11ms TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-08-30 18:25:15,309 INFO L928 BasicCegarLoop]: 12 mSDtfsCounter, 224 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 1119 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 380.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.87ms SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 459.23ms IncrementalHoareTripleChecker+Time [2021-08-30 18:25:15,309 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 54 Invalid, 1150 Unknown, 0 Unchecked, 5.87ms Time], IncrementalHoareTripleChecker [31 Valid, 1119 Invalid, 0 Unknown, 0 Unchecked, 459.23ms Time] [2021-08-30 18:25:15,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-08-30 18:25:15,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 109. [2021-08-30 18:25:15,312 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) [2021-08-30 18:25:15,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 119 transitions. [2021-08-30 18:25:15,313 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 119 transitions. Word has length 55 [2021-08-30 18:25:15,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:25:15,313 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 119 transitions. [2021-08-30 18:25:15,313 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) [2021-08-30 18:25:15,313 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 119 transitions. [2021-08-30 18:25:15,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-30 18:25:15,314 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:25:15,314 INFO L513 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] [2021-08-30 18:25:15,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-08-30 18:25:15,314 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)] === [2021-08-30 18:25:15,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:25:15,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1934169816, now seen corresponding path program 1 times [2021-08-30 18:25:15,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:25:15,315 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129580581] [2021-08-30 18:25:15,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:25:15,315 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:25:15,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:15,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:25:15,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:15,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 18:25:15,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:15,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-08-30 18:25:15,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:15,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-30 18:25:15,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:15,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-08-30 18:25:15,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:15,424 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-30 18:25:15,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:25:15,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129580581] [2021-08-30 18:25:15,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129580581] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 18:25:15,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23848191] [2021-08-30 18:25:15,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:25:15,425 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 18:25:15,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 18:25:15,426 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) [2021-08-30 18:25:15,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-30 18:25:15,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:15,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-30 18:25:15,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 18:25:15,657 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-30 18:25:15,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 18:25:15,761 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-30 18:25:15,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23848191] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 18:25:15,761 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 18:25:15,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 13 [2021-08-30 18:25:15,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654886425] [2021-08-30 18:25:15,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-30 18:25:15,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:25:15,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-30 18:25:15,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-08-30 18:25:15,763 INFO L87 Difference]: Start difference. First operand 109 states and 119 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 10 states have internal predecessors, (49), 7 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-08-30 18:25:16,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:25:16,119 INFO L93 Difference]: Finished difference Result 137 states and 149 transitions. [2021-08-30 18:25:16,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-30 18:25:16,121 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 10 states have internal predecessors, (49), 7 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 55 [2021-08-30 18:25:16,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:25:16,122 INFO L225 Difference]: With dead ends: 137 [2021-08-30 18:25:16,122 INFO L226 Difference]: Without dead ends: 137 [2021-08-30 18:25:16,122 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 96.82ms TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-08-30 18:25:16,122 INFO L928 BasicCegarLoop]: 17 mSDtfsCounter, 155 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 233.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.70ms SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 313.13ms IncrementalHoareTripleChecker+Time [2021-08-30 18:25:16,123 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 67 Invalid, 649 Unknown, 0 Unchecked, 3.70ms Time], IncrementalHoareTripleChecker [46 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 313.13ms Time] [2021-08-30 18:25:16,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-08-30 18:25:16,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 116. [2021-08-30 18:25:16,125 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) [2021-08-30 18:25:16,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 128 transitions. [2021-08-30 18:25:16,126 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 128 transitions. Word has length 55 [2021-08-30 18:25:16,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:25:16,126 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 128 transitions. [2021-08-30 18:25:16,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 10 states have internal predecessors, (49), 7 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-08-30 18:25:16,126 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 128 transitions. [2021-08-30 18:25:16,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-30 18:25:16,127 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:25:16,127 INFO L513 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] [2021-08-30 18:25:16,148 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-08-30 18:25:16,327 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 [2021-08-30 18:25:16,327 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)] === [2021-08-30 18:25:16,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:25:16,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1596450663, now seen corresponding path program 1 times [2021-08-30 18:25:16,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:25:16,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178703661] [2021-08-30 18:25:16,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:25:16,328 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:25:16,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:16,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:25:16,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:16,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 18:25:16,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:16,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-08-30 18:25:16,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:16,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-30 18:25:16,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:17,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-08-30 18:25:17,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:17,160 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 18:25:17,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:25:17,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178703661] [2021-08-30 18:25:17,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178703661] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 18:25:17,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431458900] [2021-08-30 18:25:17,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:25:17,161 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 18:25:17,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 18:25:17,163 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) [2021-08-30 18:25:17,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-30 18:25:17,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:17,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 99 conjunts are in the unsatisfiable core [2021-08-30 18:25:17,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 18:25:17,311 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 [2021-08-30 18:25:17,769 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-30 18:25:17,769 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 [2021-08-30 18:25:17,787 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-30 18:25:17,787 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 [2021-08-30 18:25:17,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-08-30 18:25:17,923 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 [2021-08-30 18:25:18,032 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 [2021-08-30 18:25:18,041 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 [2021-08-30 18:25:18,221 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 [2021-08-30 18:25:18,231 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 [2021-08-30 18:25:18,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-30 18:25:18,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-30 18:25:18,332 INFO L354 Elim1Store]: treesize reduction 41, result has 21.2 percent of original size [2021-08-30 18:25:18,332 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 [2021-08-30 18:25:18,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-30 18:25:18,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-30 18:25:18,353 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-30 18:25:18,353 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 [2021-08-30 18:25:18,808 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-30 18:25:18,809 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 [2021-08-30 18:25:18,815 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-30 18:25:18,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 27 [2021-08-30 18:25:23,882 INFO L354 Elim1Store]: treesize reduction 168, result has 18.0 percent of original size [2021-08-30 18:25:23,882 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 [2021-08-30 18:25:23,914 INFO L354 Elim1Store]: treesize reduction 136, result has 17.6 percent of original size [2021-08-30 18:25:23,915 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 [2021-08-30 18:25:24,300 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-30 18:25:24,300 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 [2021-08-30 18:25:24,313 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-30 18:25:24,315 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 [2021-08-30 18:25:24,473 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-30 18:25:24,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 18:25:25,371 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_dll_circular_update_at_~head.offset_14 Int)) (or (< v_dll_circular_update_at_~head.offset_14 c_main_~s~0.offset) (and (forall ((v_DerPreprocessor_2 Int)) (<= 0 (+ (select (store (select |c_#memory_$Pointer$.offset| c_main_~s~0.base) (+ v_dll_circular_update_at_~head.offset_14 8) v_DerPreprocessor_2) c_main_~s~0.offset) 8))) (forall ((v_DerPreprocessor_2 Int) (v_DerPreprocessor_1 Int)) (let ((.cse0 (+ v_dll_circular_update_at_~head.offset_14 8))) (<= (+ (select (store (select |c_#memory_$Pointer$.offset| c_main_~s~0.base) .cse0 v_DerPreprocessor_2) c_main_~s~0.offset) 12) (select |c_#length| (select (store (select |c_#memory_$Pointer$.base| c_main_~s~0.base) .cse0 v_DerPreprocessor_1) c_main_~s~0.offset)))))))) is different from false [2021-08-30 18:25:25,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431458900] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 18:25:25,373 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-30 18:25:25,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 52 [2021-08-30 18:25:25,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327951252] [2021-08-30 18:25:25,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-08-30 18:25:25,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:25:25,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-08-30 18:25:25,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=3158, Unknown=3, NotChecked=112, Total=3422 [2021-08-30 18:25:25,376 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) [2021-08-30 18:25:32,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:25:32,322 INFO L93 Difference]: Finished difference Result 181 states and 204 transitions. [2021-08-30 18:25:32,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-30 18:25:32,322 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 [2021-08-30 18:25:32,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:25:32,323 INFO L225 Difference]: With dead ends: 181 [2021-08-30 18:25:32,323 INFO L226 Difference]: Without dead ends: 181 [2021-08-30 18:25:32,326 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 81 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 906 ImplicationChecksByTransitivity, 12316.00ms TimeCoverageRelationStatistics Valid=415, Invalid=6228, Unknown=3, NotChecked=160, Total=6806 [2021-08-30 18:25:32,326 INFO L928 BasicCegarLoop]: 12 mSDtfsCounter, 278 mSDsluCounter, 843 mSDsCounter, 0 mSdLazyCounter, 3945 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1524.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 4393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.79ms SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 3945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 372 IncrementalHoareTripleChecker+Unchecked, 1795.92ms IncrementalHoareTripleChecker+Time [2021-08-30 18:25:32,327 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 120 Invalid, 4393 Unknown, 0 Unchecked, 12.79ms Time], IncrementalHoareTripleChecker [76 Valid, 3945 Invalid, 0 Unknown, 372 Unchecked, 1795.92ms Time] [2021-08-30 18:25:32,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-08-30 18:25:32,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 131. [2021-08-30 18:25:32,331 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) [2021-08-30 18:25:32,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 149 transitions. [2021-08-30 18:25:32,332 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 149 transitions. Word has length 56 [2021-08-30 18:25:32,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:25:32,333 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 149 transitions. [2021-08-30 18:25:32,333 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) [2021-08-30 18:25:32,333 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 149 transitions. [2021-08-30 18:25:32,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-30 18:25:32,334 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:25:32,334 INFO L513 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] [2021-08-30 18:25:32,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-30 18:25:32,548 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 [2021-08-30 18:25:32,549 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)] === [2021-08-30 18:25:32,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:25:32,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1596450664, now seen corresponding path program 1 times [2021-08-30 18:25:32,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:25:32,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557408330] [2021-08-30 18:25:32,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:25:32,550 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:25:32,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:32,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:25:32,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:32,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 18:25:32,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:32,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-08-30 18:25:32,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:32,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-30 18:25:32,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:33,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-08-30 18:25:33,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:33,131 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 18:25:33,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:25:33,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557408330] [2021-08-30 18:25:33,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557408330] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 18:25:33,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845661628] [2021-08-30 18:25:33,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:25:33,132 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 18:25:33,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 18:25:33,133 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) [2021-08-30 18:25:33,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-30 18:25:33,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:33,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-30 18:25:33,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 18:25:33,275 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 [2021-08-30 18:25:33,428 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-30 18:25:33,428 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 [2021-08-30 18:25:33,481 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 [2021-08-30 18:25:33,527 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 [2021-08-30 18:25:33,647 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-08-30 18:25:33,647 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 [2021-08-30 18:25:34,346 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-08-30 18:25:34,347 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 [2021-08-30 18:25:34,593 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-08-30 18:25:34,593 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 50 treesize of output 19 [2021-08-30 18:25:47,364 INFO L354 Elim1Store]: treesize reduction 138, result has 15.9 percent of original size [2021-08-30 18:25:47,364 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 72 treesize of output 47 [2021-08-30 18:25:47,558 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-08-30 18:25:47,558 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 57 treesize of output 22 [2021-08-30 18:25:47,564 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-30 18:25:47,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 18:25:48,204 INFO L354 Elim1Store]: treesize reduction 5, result has 75.0 percent of original size [2021-08-30 18:25:48,204 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 24 treesize of output 23 [2021-08-30 18:25:48,601 WARN L838 $PredicateComparison]: unable to prove that (forall ((dll_circular_create_~last~0.offset Int)) (= (select (select (store |c_#memory_$Pointer$.base| c_dll_circular_create_~last~0.base (store (select |c_#memory_$Pointer$.base| c_dll_circular_create_~last~0.base) dll_circular_create_~last~0.offset c_dll_circular_create_~head~0.base)) c_dll_circular_create_~head~0.base) c_dll_circular_create_~head~0.offset) c_dll_circular_create_~last~0.base)) is different from false [2021-08-30 18:25:49,038 WARN L838 $PredicateComparison]: unable to prove that (forall ((dll_circular_create_~last~0.offset Int)) (= c_dll_circular_create_~last~0.base (select (select (store |c_#memory_$Pointer$.base| c_dll_circular_create_~last~0.base (store (select |c_#memory_$Pointer$.base| c_dll_circular_create_~last~0.base) dll_circular_create_~last~0.offset c_dll_circular_create_~new_head~0.base)) c_dll_circular_create_~new_head~0.base) c_dll_circular_create_~new_head~0.offset))) is different from false [2021-08-30 18:25:49,633 WARN L838 $PredicateComparison]: unable to prove that (forall ((dll_circular_create_~last~0.offset Int) (dll_circular_create_~head~0.offset Int)) (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| c_dll_circular_create_~head~0.base (store (select |c_#memory_$Pointer$.base| c_dll_circular_create_~head~0.base) (+ dll_circular_create_~head~0.offset 4) c_dll_circular_create_~new_head~0.base)))) (store .cse0 c_dll_circular_create_~last~0.base (store (select .cse0 c_dll_circular_create_~last~0.base) dll_circular_create_~last~0.offset c_dll_circular_create_~new_head~0.base))) c_dll_circular_create_~new_head~0.base) c_dll_circular_create_~new_head~0.offset) c_dll_circular_create_~last~0.base)) is different from false [2021-08-30 18:25:49,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845661628] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 18:25:49,764 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-30 18:25:49,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25] total 47 [2021-08-30 18:25:49,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76894979] [2021-08-30 18:25:49,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-08-30 18:25:49,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:25:49,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-08-30 18:25:49,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=2788, Unknown=22, NotChecked=324, Total=3306 [2021-08-30 18:25:49,766 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) [2021-08-30 18:25:51,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:25:51,205 INFO L93 Difference]: Finished difference Result 151 states and 168 transitions. [2021-08-30 18:25:51,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-30 18:25:51,205 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 [2021-08-30 18:25:51,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:25:51,206 INFO L225 Difference]: With dead ends: 151 [2021-08-30 18:25:51,207 INFO L226 Difference]: Without dead ends: 151 [2021-08-30 18:25:51,208 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 74 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 896 ImplicationChecksByTransitivity, 16736.43ms TimeCoverageRelationStatistics Valid=318, Invalid=4928, Unknown=22, NotChecked=432, Total=5700 [2021-08-30 18:25:51,209 INFO L928 BasicCegarLoop]: 13 mSDtfsCounter, 184 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 2040 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 589.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 2896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.45ms SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 2040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 814 IncrementalHoareTripleChecker+Unchecked, 726.57ms IncrementalHoareTripleChecker+Time [2021-08-30 18:25:51,209 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 169 Invalid, 2896 Unknown, 0 Unchecked, 6.45ms Time], IncrementalHoareTripleChecker [42 Valid, 2040 Invalid, 0 Unknown, 814 Unchecked, 726.57ms Time] [2021-08-30 18:25:51,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-08-30 18:25:51,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 130. [2021-08-30 18:25:51,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 90 states have (on average 1.3666666666666667) internal successors, (123), 110 states have internal predecessors, (123), 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) [2021-08-30 18:25:51,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 146 transitions. [2021-08-30 18:25:51,213 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 146 transitions. Word has length 56 [2021-08-30 18:25:51,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:25:51,214 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 146 transitions. [2021-08-30 18:25:51,214 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) [2021-08-30 18:25:51,214 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 146 transitions. [2021-08-30 18:25:51,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-30 18:25:51,215 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:25:51,215 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 18:25:51,238 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-08-30 18:25:51,428 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 [2021-08-30 18:25:51,429 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)] === [2021-08-30 18:25:51,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:25:51,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1687196488, now seen corresponding path program 2 times [2021-08-30 18:25:51,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:25:51,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257835821] [2021-08-30 18:25:51,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:25:51,429 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:25:51,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:51,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:25:51,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:51,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 18:25:51,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:51,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-08-30 18:25:51,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:51,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-30 18:25:51,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:51,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-08-30 18:25:51,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:51,540 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-30 18:25:51,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:25:51,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257835821] [2021-08-30 18:25:51,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257835821] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 18:25:51,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088950897] [2021-08-30 18:25:51,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 18:25:51,541 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 18:25:51,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 18:25:51,545 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) [2021-08-30 18:25:51,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-30 18:25:51,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-30 18:25:51,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 18:25:51,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-30 18:25:51,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 18:25:51,887 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-08-30 18:25:51,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 18:25:52,012 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-08-30 18:25:52,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088950897] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 18:25:52,012 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 18:25:52,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 11 [2021-08-30 18:25:52,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052626063] [2021-08-30 18:25:52,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-30 18:25:52,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:25:52,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-30 18:25:52,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-08-30 18:25:52,015 INFO L87 Difference]: Start difference. First operand 130 states and 146 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) [2021-08-30 18:25:52,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:25:52,433 INFO L93 Difference]: Finished difference Result 148 states and 162 transitions. [2021-08-30 18:25:52,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-30 18:25:52,435 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 [2021-08-30 18:25:52,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:25:52,436 INFO L225 Difference]: With dead ends: 148 [2021-08-30 18:25:52,436 INFO L226 Difference]: Without dead ends: 148 [2021-08-30 18:25:52,436 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 168.99ms TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-08-30 18:25:52,437 INFO L928 BasicCegarLoop]: 15 mSDtfsCounter, 155 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 231.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.12ms SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 286.36ms IncrementalHoareTripleChecker+Time [2021-08-30 18:25:52,437 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 72 Invalid, 613 Unknown, 0 Unchecked, 2.12ms Time], IncrementalHoareTripleChecker [46 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 286.36ms Time] [2021-08-30 18:25:52,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-08-30 18:25:52,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 127. [2021-08-30 18:25:52,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 89 states have (on average 1.3258426966292134) internal successors, (118), 107 states have internal predecessors, (118), 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) [2021-08-30 18:25:52,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 141 transitions. [2021-08-30 18:25:52,441 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 141 transitions. Word has length 59 [2021-08-30 18:25:52,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:25:52,442 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 141 transitions. [2021-08-30 18:25:52,442 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) [2021-08-30 18:25:52,442 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 141 transitions. [2021-08-30 18:25:52,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-08-30 18:25:52,443 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:25:52,443 INFO L513 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] [2021-08-30 18:25:52,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-30 18:25:52,649 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 [2021-08-30 18:25:52,649 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)] === [2021-08-30 18:25:52,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:25:52,649 INFO L82 PathProgramCache]: Analyzing trace with hash -588638996, now seen corresponding path program 2 times [2021-08-30 18:25:52,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:25:52,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995092736] [2021-08-30 18:25:52,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:25:52,650 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:25:52,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:52,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:25:52,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:52,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 18:25:52,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:52,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-08-30 18:25:52,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:52,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-30 18:25:52,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:52,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-08-30 18:25:52,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:52,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-08-30 18:25:52,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:52,888 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-08-30 18:25:52,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:25:52,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995092736] [2021-08-30 18:25:52,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995092736] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 18:25:52,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248808508] [2021-08-30 18:25:52,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 18:25:52,890 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 18:25:52,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 18:25:52,917 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) [2021-08-30 18:25:52,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-30 18:25:53,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-08-30 18:25:53,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 18:25:53,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-30 18:25:53,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 18:25:53,439 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-30 18:25:53,439 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-30 18:25:53,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248808508] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 18:25:53,440 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-30 18:25:53,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [9] total 21 [2021-08-30 18:25:53,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849404670] [2021-08-30 18:25:53,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-30 18:25:53,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:25:53,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-30 18:25:53,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-08-30 18:25:53,441 INFO L87 Difference]: Start difference. First operand 127 states and 141 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) [2021-08-30 18:25:53,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:25:53,887 INFO L93 Difference]: Finished difference Result 165 states and 185 transitions. [2021-08-30 18:25:53,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-30 18:25:53,888 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 [2021-08-30 18:25:53,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:25:53,889 INFO L225 Difference]: With dead ends: 165 [2021-08-30 18:25:53,889 INFO L226 Difference]: Without dead ends: 165 [2021-08-30 18:25:53,890 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 325.10ms TimeCoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-08-30 18:25:53,890 INFO L928 BasicCegarLoop]: 16 mSDtfsCounter, 67 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 300.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.76ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 374.50ms IncrementalHoareTripleChecker+Time [2021-08-30 18:25:53,891 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 100 Invalid, 921 Unknown, 0 Unchecked, 2.76ms Time], IncrementalHoareTripleChecker [1 Valid, 832 Invalid, 0 Unknown, 88 Unchecked, 374.50ms Time] [2021-08-30 18:25:53,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-08-30 18:25:53,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 150. [2021-08-30 18:25:53,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 109 states have (on average 1.3577981651376148) internal successors, (148), 127 states have internal predecessors, (148), 13 states have call successors, (13), 10 states have call predecessors, (13), 10 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2021-08-30 18:25:53,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 175 transitions. [2021-08-30 18:25:53,896 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 175 transitions. Word has length 63 [2021-08-30 18:25:53,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:25:53,896 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 175 transitions. [2021-08-30 18:25:53,896 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) [2021-08-30 18:25:53,897 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 175 transitions. [2021-08-30 18:25:53,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-08-30 18:25:53,897 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:25:53,897 INFO L513 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] [2021-08-30 18:25:53,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-30 18:25:54,109 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 [2021-08-30 18:25:54,109 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)] === [2021-08-30 18:25:54,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:25:54,109 INFO L82 PathProgramCache]: Analyzing trace with hash -588638941, now seen corresponding path program 1 times [2021-08-30 18:25:54,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:25:54,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749626908] [2021-08-30 18:25:54,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:25:54,110 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:25:54,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:54,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:25:54,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:54,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 18:25:54,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:54,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-08-30 18:25:54,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:54,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-30 18:25:54,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:54,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-08-30 18:25:54,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:54,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-08-30 18:25:54,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:54,211 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-08-30 18:25:54,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:25:54,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749626908] [2021-08-30 18:25:54,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749626908] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 18:25:54,212 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:25:54,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-30 18:25:54,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534274298] [2021-08-30 18:25:54,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-30 18:25:54,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:25:54,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-30 18:25:54,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-08-30 18:25:54,214 INFO L87 Difference]: Start difference. First operand 150 states and 175 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) [2021-08-30 18:25:54,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:25:54,558 INFO L93 Difference]: Finished difference Result 184 states and 207 transitions. [2021-08-30 18:25:54,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-30 18:25:54,558 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 [2021-08-30 18:25:54,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:25:54,559 INFO L225 Difference]: With dead ends: 184 [2021-08-30 18:25:54,559 INFO L226 Difference]: Without dead ends: 184 [2021-08-30 18:25:54,560 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 92.97ms TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-08-30 18:25:54,560 INFO L928 BasicCegarLoop]: 16 mSDtfsCounter, 140 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 212.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.15ms SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 274.11ms IncrementalHoareTripleChecker+Time [2021-08-30 18:25:54,560 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 68 Invalid, 527 Unknown, 0 Unchecked, 2.15ms Time], IncrementalHoareTripleChecker [25 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 274.11ms Time] [2021-08-30 18:25:54,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-08-30 18:25:54,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 162. [2021-08-30 18:25:54,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 119 states have (on average 1.3361344537815125) internal successors, (159), 137 states have internal predecessors, (159), 13 states have call successors, (13), 12 states have call predecessors, (13), 12 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2021-08-30 18:25:54,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 186 transitions. [2021-08-30 18:25:54,565 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 186 transitions. Word has length 63 [2021-08-30 18:25:54,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:25:54,566 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 186 transitions. [2021-08-30 18:25:54,566 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) [2021-08-30 18:25:54,566 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 186 transitions. [2021-08-30 18:25:54,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-08-30 18:25:54,566 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:25:54,567 INFO L513 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] [2021-08-30 18:25:54,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-08-30 18:25:54,567 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting dll_circular_get_data_atErr3REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-08-30 18:25:54,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:25:54,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1854885907, now seen corresponding path program 1 times [2021-08-30 18:25:54,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:25:54,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013749466] [2021-08-30 18:25:54,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:25:54,568 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:25:54,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:54,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:25:54,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:54,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 18:25:54,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:54,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-08-30 18:25:54,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:54,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-30 18:25:54,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:54,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-08-30 18:25:54,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:54,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-08-30 18:25:54,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:54,809 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-08-30 18:25:54,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:25:54,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013749466] [2021-08-30 18:25:54,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013749466] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 18:25:54,810 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:25:54,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-08-30 18:25:54,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431231325] [2021-08-30 18:25:54,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-30 18:25:54,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:25:54,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-30 18:25:54,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-08-30 18:25:54,811 INFO L87 Difference]: Start difference. First operand 162 states and 186 transitions. Second operand has 15 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 9 states have internal predecessors, (46), 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) [2021-08-30 18:25:55,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:25:55,408 INFO L93 Difference]: Finished difference Result 189 states and 210 transitions. [2021-08-30 18:25:55,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-30 18:25:55,408 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 9 states have internal predecessors, (46), 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 66 [2021-08-30 18:25:55,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:25:55,409 INFO L225 Difference]: With dead ends: 189 [2021-08-30 18:25:55,410 INFO L226 Difference]: Without dead ends: 189 [2021-08-30 18:25:55,410 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 254.54ms TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-08-30 18:25:55,410 INFO L928 BasicCegarLoop]: 12 mSDtfsCounter, 220 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 1099 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 362.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.58ms SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 454.82ms IncrementalHoareTripleChecker+Time [2021-08-30 18:25:55,411 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 54 Invalid, 1124 Unknown, 0 Unchecked, 3.58ms Time], IncrementalHoareTripleChecker [25 Valid, 1099 Invalid, 0 Unknown, 0 Unchecked, 454.82ms Time] [2021-08-30 18:25:55,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-08-30 18:25:55,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 133. [2021-08-30 18:25:55,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 94 states have (on average 1.2872340425531914) internal successors, (121), 112 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) [2021-08-30 18:25:55,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 144 transitions. [2021-08-30 18:25:55,415 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 144 transitions. Word has length 66 [2021-08-30 18:25:55,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:25:55,416 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 144 transitions. [2021-08-30 18:25:55,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 9 states have internal predecessors, (46), 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) [2021-08-30 18:25:55,416 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 144 transitions. [2021-08-30 18:25:55,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-30 18:25:55,417 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:25:55,417 INFO L513 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] [2021-08-30 18:25:55,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-08-30 18:25:55,417 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting dll_circular_update_atErr3REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-08-30 18:25:55,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:25:55,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1201906212, now seen corresponding path program 3 times [2021-08-30 18:25:55,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:25:55,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843879166] [2021-08-30 18:25:55,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:25:55,418 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:25:55,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:55,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:25:55,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:55,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 18:25:55,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:55,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-08-30 18:25:55,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:55,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-30 18:25:55,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:55,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-08-30 18:25:55,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:55,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-08-30 18:25:55,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:55,526 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-08-30 18:25:55,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:25:55,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843879166] [2021-08-30 18:25:55,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843879166] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 18:25:55,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335528590] [2021-08-30 18:25:55,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-30 18:25:55,527 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 18:25:55,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 18:25:55,533 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) [2021-08-30 18:25:55,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-30 18:25:56,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-30 18:25:56,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 18:25:56,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-30 18:25:56,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 18:25:56,293 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-08-30 18:25:56,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 18:25:56,487 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-08-30 18:25:56,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335528590] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 18:25:56,487 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 18:25:56,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 17 [2021-08-30 18:25:56,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984075887] [2021-08-30 18:25:56,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-30 18:25:56,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:25:56,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-30 18:25:56,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-08-30 18:25:56,490 INFO L87 Difference]: Start difference. First operand 133 states and 144 transitions. Second operand has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 12 states have internal predecessors, (63), 6 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) [2021-08-30 18:25:57,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:25:57,018 INFO L93 Difference]: Finished difference Result 142 states and 148 transitions. [2021-08-30 18:25:57,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-30 18:25:57,019 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 12 states have internal predecessors, (63), 6 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) Word has length 67 [2021-08-30 18:25:57,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:25:57,020 INFO L225 Difference]: With dead ends: 142 [2021-08-30 18:25:57,020 INFO L226 Difference]: Without dead ends: 142 [2021-08-30 18:25:57,020 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 232.65ms TimeCoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2021-08-30 18:25:57,021 INFO L928 BasicCegarLoop]: 17 mSDtfsCounter, 138 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 304.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.59ms SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 375.45ms IncrementalHoareTripleChecker+Time [2021-08-30 18:25:57,021 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 88 Invalid, 805 Unknown, 0 Unchecked, 3.59ms Time], IncrementalHoareTripleChecker [43 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 375.45ms Time] [2021-08-30 18:25:57,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-08-30 18:25:57,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 116. [2021-08-30 18:25:57,023 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) [2021-08-30 18:25:57,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 122 transitions. [2021-08-30 18:25:57,024 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 122 transitions. Word has length 67 [2021-08-30 18:25:57,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:25:57,024 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 122 transitions. [2021-08-30 18:25:57,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 12 states have internal predecessors, (63), 6 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) [2021-08-30 18:25:57,025 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 122 transitions. [2021-08-30 18:25:57,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-08-30 18:25:57,034 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:25:57,034 INFO L513 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] [2021-08-30 18:25:57,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-30 18:25:57,249 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,SelfDestructingSolverStorable25 [2021-08-30 18:25:57,249 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-08-30 18:25:57,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:25:57,250 INFO L82 PathProgramCache]: Analyzing trace with hash 12643276, now seen corresponding path program 1 times [2021-08-30 18:25:57,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:25:57,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485278360] [2021-08-30 18:25:57,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:25:57,250 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:25:57,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:57,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:25:57,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:57,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 18:25:57,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:57,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-08-30 18:25:57,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:57,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-30 18:25:57,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:57,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-08-30 18:25:57,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:57,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-08-30 18:25:57,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:57,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-08-30 18:25:57,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:57,367 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-08-30 18:25:57,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:25:57,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485278360] [2021-08-30 18:25:57,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485278360] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 18:25:57,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37385597] [2021-08-30 18:25:57,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:25:57,368 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 18:25:57,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 18:25:57,373 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) [2021-08-30 18:25:57,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-30 18:25:57,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:57,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-30 18:25:57,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 18:25:57,617 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-08-30 18:25:57,618 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-30 18:25:57,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37385597] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 18:25:57,618 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-30 18:25:57,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2021-08-30 18:25:57,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446503793] [2021-08-30 18:25:57,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-30 18:25:57,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:25:57,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-30 18:25:57,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-08-30 18:25:57,619 INFO L87 Difference]: Start difference. First operand 116 states and 122 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) [2021-08-30 18:25:57,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:25:57,809 INFO L93 Difference]: Finished difference Result 121 states and 125 transitions. [2021-08-30 18:25:57,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-30 18:25:57,809 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 [2021-08-30 18:25:57,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:25:57,810 INFO L225 Difference]: With dead ends: 121 [2021-08-30 18:25:57,810 INFO L226 Difference]: Without dead ends: 118 [2021-08-30 18:25:57,810 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 54.36ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-08-30 18:25:57,811 INFO L928 BasicCegarLoop]: 18 mSDtfsCounter, 19 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 128.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.06ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 177.26ms IncrementalHoareTripleChecker+Time [2021-08-30 18:25:57,811 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 78 Invalid, 423 Unknown, 0 Unchecked, 1.06ms Time], IncrementalHoareTripleChecker [3 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 177.26ms Time] [2021-08-30 18:25:57,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-08-30 18:25:57,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 116. [2021-08-30 18:25:57,813 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) [2021-08-30 18:25:57,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 121 transitions. [2021-08-30 18:25:57,814 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 121 transitions. Word has length 69 [2021-08-30 18:25:57,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:25:57,814 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 121 transitions. [2021-08-30 18:25:57,814 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) [2021-08-30 18:25:57,814 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 121 transitions. [2021-08-30 18:25:57,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-30 18:25:57,815 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:25:57,815 INFO L513 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] [2021-08-30 18:25:57,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-30 18:25:58,024 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,SelfDestructingSolverStorable26 [2021-08-30 18:25:58,025 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-08-30 18:25:58,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:25:58,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1401782797, now seen corresponding path program 1 times [2021-08-30 18:25:58,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:25:58,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734382742] [2021-08-30 18:25:58,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:25:58,026 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:25:58,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:58,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:25:58,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:58,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 18:25:58,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:58,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-08-30 18:25:58,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:58,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-30 18:25:58,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:58,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-08-30 18:25:58,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:58,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-08-30 18:25:58,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:58,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-08-30 18:25:58,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:59,040 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-30 18:25:59,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:25:59,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734382742] [2021-08-30 18:25:59,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734382742] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 18:25:59,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814197114] [2021-08-30 18:25:59,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:25:59,041 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 18:25:59,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 18:25:59,042 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) [2021-08-30 18:25:59,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-30 18:25:59,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:25:59,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 97 conjunts are in the unsatisfiable core [2021-08-30 18:25:59,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 18:25:59,204 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 [2021-08-30 18:25:59,416 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-30 18:25:59,416 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 [2021-08-30 18:25:59,484 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 [2021-08-30 18:25:59,534 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 [2021-08-30 18:25:59,672 INFO L354 Elim1Store]: treesize reduction 60, result has 22.1 percent of original size [2021-08-30 18:25:59,673 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 [2021-08-30 18:25:59,737 INFO L354 Elim1Store]: treesize reduction 76, result has 18.3 percent of original size [2021-08-30 18:25:59,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 39 [2021-08-30 18:26:00,169 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 [2021-08-30 18:26:00,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-30 18:26:00,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-30 18:26:00,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-30 18:26:00,240 INFO L354 Elim1Store]: treesize reduction 71, result has 11.3 percent of original size [2021-08-30 18:26:00,240 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 5 new quantified variables, introduced 4 case distinctions, treesize of input 82 treesize of output 42 [2021-08-30 18:26:01,081 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 [2021-08-30 18:26:01,100 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-08-30 18:26:01,100 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 [2021-08-30 18:26:01,109 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-08-30 18:26:01,110 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 [2021-08-30 18:26:01,517 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-08-30 18:26:01,517 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 [2021-08-30 18:26:01,573 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-08-30 18:26:01,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 18:26:27,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814197114] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 18:26:27,648 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-30 18:26:27,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 37] total 68 [2021-08-30 18:26:27,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082780323] [2021-08-30 18:26:27,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-08-30 18:26:27,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:26:27,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-08-30 18:26:27,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=5153, Unknown=23, NotChecked=144, Total=5550 [2021-08-30 18:26:27,651 INFO L87 Difference]: Start difference. First operand 116 states and 121 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) [2021-08-30 18:26:40,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:26:40,631 INFO L93 Difference]: Finished difference Result 139 states and 144 transitions. [2021-08-30 18:26:40,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-30 18:26:40,632 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 [2021-08-30 18:26:40,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:26:40,633 INFO L225 Difference]: With dead ends: 139 [2021-08-30 18:26:40,633 INFO L226 Difference]: Without dead ends: 139 [2021-08-30 18:26:40,635 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 56 SyntacticMatches, 4 SemanticMatches, 99 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2066 ImplicationChecksByTransitivity, 40265.57ms TimeCoverageRelationStatistics Valid=465, Invalid=9392, Unknown=47, NotChecked=196, Total=10100 [2021-08-30 18:26:40,636 INFO L928 BasicCegarLoop]: 13 mSDtfsCounter, 218 mSDsluCounter, 680 mSDsCounter, 0 mSdLazyCounter, 2718 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 912.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 3998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.99ms SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 2718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1229 IncrementalHoareTripleChecker+Unchecked, 1077.28ms IncrementalHoareTripleChecker+Time [2021-08-30 18:26:40,636 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 265 Invalid, 3998 Unknown, 0 Unchecked, 10.99ms Time], IncrementalHoareTripleChecker [51 Valid, 2718 Invalid, 0 Unknown, 1229 Unchecked, 1077.28ms Time] [2021-08-30 18:26:40,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-08-30 18:26:40,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 116. [2021-08-30 18:26:40,639 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) [2021-08-30 18:26:40,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 120 transitions. [2021-08-30 18:26:40,640 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 120 transitions. Word has length 72 [2021-08-30 18:26:40,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:26:40,640 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 120 transitions. [2021-08-30 18:26:40,640 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) [2021-08-30 18:26:40,641 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 120 transitions. [2021-08-30 18:26:40,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-30 18:26:40,641 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:26:40,642 INFO L513 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] [2021-08-30 18:26:40,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-30 18:26:40,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 18:26:40,857 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)] === [2021-08-30 18:26:40,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:26:40,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1392196614, now seen corresponding path program 1 times [2021-08-30 18:26:40,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:26:40,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489248734] [2021-08-30 18:26:40,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:26:40,858 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:26:40,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:26:40,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:26:40,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:26:41,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 18:26:41,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:26:41,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-08-30 18:26:41,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:26:41,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-30 18:26:41,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:26:41,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-08-30 18:26:41,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:26:41,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-08-30 18:26:41,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:26:41,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-08-30 18:26:41,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:26:41,629 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-30 18:26:41,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:26:41,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489248734] [2021-08-30 18:26:41,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489248734] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 18:26:41,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75667527] [2021-08-30 18:26:41,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:26:41,630 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 18:26:41,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 18:26:41,631 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) [2021-08-30 18:26:41,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-30 18:26:41,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:26:41,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 78 conjunts are in the unsatisfiable core [2021-08-30 18:26:41,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 18:26:41,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-30 18:26:41,921 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-30 18:26:41,922 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 [2021-08-30 18:26:41,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-08-30 18:26:42,018 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 [2021-08-30 18:26:42,157 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-08-30 18:26:42,157 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 [2021-08-30 18:26:42,225 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-08-30 18:26:42,225 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 [2021-08-30 18:26:43,153 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 [2021-08-30 18:26:43,195 INFO L354 Elim1Store]: treesize reduction 138, result has 15.9 percent of original size [2021-08-30 18:26:43,195 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 [2021-08-30 18:26:44,104 INFO L354 Elim1Store]: treesize reduction 140, result has 18.6 percent of original size [2021-08-30 18:26:44,105 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 [2021-08-30 18:26:44,569 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-30 18:26:44,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 16 [2021-08-30 18:26:44,576 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 5 trivial. 2 not checked. [2021-08-30 18:26:44,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 18:26:44,653 INFO L354 Elim1Store]: treesize reduction 5, result has 85.3 percent of original size [2021-08-30 18:26:44,653 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 38 treesize of output 37 [2021-08-30 18:26:45,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75667527] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 18:26:45,613 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-30 18:26:45,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 54 [2021-08-30 18:26:45,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191496702] [2021-08-30 18:26:45,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-08-30 18:26:45,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:26:45,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-08-30 18:26:45,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=2821, Unknown=1, NotChecked=106, Total=3080 [2021-08-30 18:26:45,616 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) [2021-08-30 18:26:50,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:26:50,885 INFO L93 Difference]: Finished difference Result 147 states and 152 transitions. [2021-08-30 18:26:50,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-30 18:26:50,886 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 [2021-08-30 18:26:50,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:26:50,887 INFO L225 Difference]: With dead ends: 147 [2021-08-30 18:26:50,887 INFO L226 Difference]: Without dead ends: 147 [2021-08-30 18:26:50,888 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 91 SyntacticMatches, 3 SemanticMatches, 78 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 8068.46ms TimeCoverageRelationStatistics Valid=400, Invalid=5764, Unknown=2, NotChecked=154, Total=6320 [2021-08-30 18:26:50,889 INFO L928 BasicCegarLoop]: 10 mSDtfsCounter, 232 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 2491 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 764.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 3435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.21ms SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 2491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 894 IncrementalHoareTripleChecker+Unchecked, 933.92ms IncrementalHoareTripleChecker+Time [2021-08-30 18:26:50,889 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 107 Invalid, 3435 Unknown, 0 Unchecked, 8.21ms Time], IncrementalHoareTripleChecker [50 Valid, 2491 Invalid, 0 Unknown, 894 Unchecked, 933.92ms Time] [2021-08-30 18:26:50,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-08-30 18:26:50,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 120. [2021-08-30 18:26:50,892 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) [2021-08-30 18:26:50,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 127 transitions. [2021-08-30 18:26:50,893 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 127 transitions. Word has length 80 [2021-08-30 18:26:50,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:26:50,893 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 127 transitions. [2021-08-30 18:26:50,893 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) [2021-08-30 18:26:50,893 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 127 transitions. [2021-08-30 18:26:50,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-30 18:26:50,894 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:26:50,894 INFO L513 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] [2021-08-30 18:26:50,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-30 18:26:51,112 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 [2021-08-30 18:26:51,113 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)] === [2021-08-30 18:26:51,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:26:51,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1392196615, now seen corresponding path program 1 times [2021-08-30 18:26:51,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:26:51,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271946758] [2021-08-30 18:26:51,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:26:51,114 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:26:51,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:26:51,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:26:51,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:26:51,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 18:26:51,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:26:51,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-08-30 18:26:51,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:26:51,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-30 18:26:51,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:26:51,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-08-30 18:26:51,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:26:51,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-08-30 18:26:51,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:26:52,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-08-30 18:26:52,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:26:52,132 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-30 18:26:52,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:26:52,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271946758] [2021-08-30 18:26:52,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271946758] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 18:26:52,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791664541] [2021-08-30 18:26:52,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:26:52,133 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 18:26:52,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 18:26:52,134 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) [2021-08-30 18:26:52,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-30 18:26:52,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:26:52,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 89 conjunts are in the unsatisfiable core [2021-08-30 18:26:52,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 18:26:52,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-30 18:26:52,486 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-30 18:26:52,487 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 [2021-08-30 18:26:52,552 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 [2021-08-30 18:26:52,610 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 21 treesize of output 20 [2021-08-30 18:26:52,749 INFO L354 Elim1Store]: treesize reduction 60, result has 22.1 percent of original size [2021-08-30 18:26:52,749 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 [2021-08-30 18:26:52,833 INFO L354 Elim1Store]: treesize reduction 76, result has 18.3 percent of original size [2021-08-30 18:26:52,834 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 [2021-08-30 18:26:53,853 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 [2021-08-30 18:26:53,900 INFO L354 Elim1Store]: treesize reduction 138, result has 15.9 percent of original size [2021-08-30 18:26:53,901 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 [2021-08-30 18:26:54,260 INFO L354 Elim1Store]: treesize reduction 180, result has 16.7 percent of original size [2021-08-30 18:26:54,261 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 [2021-08-30 18:26:54,271 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-08-30 18:26:54,272 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 [2021-08-30 18:26:56,834 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-30 18:26:56,834 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 [2021-08-30 18:26:56,836 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 [2021-08-30 18:26:56,933 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 2 not checked. [2021-08-30 18:26:56,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 18:26:57,228 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 182 treesize of output 142 [2021-08-30 18:26:57,236 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 18:26:57,236 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 146 treesize of output 126 [2021-08-30 18:26:57,426 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 18:26:57,427 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 63 treesize of output 67 [2021-08-30 18:27:08,111 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-30 18:27:08,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791664541] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 18:27:08,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 18:27:08,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 30] total 86 [2021-08-30 18:27:08,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526134003] [2021-08-30 18:27:08,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-08-30 18:27:08,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:27:08,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-08-30 18:27:08,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=6989, Unknown=9, NotChecked=168, Total=7482 [2021-08-30 18:27:08,114 INFO L87 Difference]: Start difference. First operand 120 states and 127 transitions. Second operand has 87 states, 86 states have (on average 1.930232558139535) internal successors, (166), 66 states have internal predecessors, (166), 11 states have call successors, (22), 14 states have call predecessors, (22), 16 states have return successors, (19), 16 states have call predecessors, (19), 11 states have call successors, (19) [2021-08-30 18:27:17,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:27:17,443 INFO L93 Difference]: Finished difference Result 146 states and 152 transitions. [2021-08-30 18:27:17,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-30 18:27:17,444 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 86 states have (on average 1.930232558139535) internal successors, (166), 66 states have internal predecessors, (166), 11 states have call successors, (22), 14 states have call predecessors, (22), 16 states have return successors, (19), 16 states have call predecessors, (19), 11 states have call successors, (19) Word has length 80 [2021-08-30 18:27:17,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:27:17,445 INFO L225 Difference]: With dead ends: 146 [2021-08-30 18:27:17,445 INFO L226 Difference]: Without dead ends: 146 [2021-08-30 18:27:17,446 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 114 SyntacticMatches, 10 SemanticMatches, 114 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2474 ImplicationChecksByTransitivity, 22721.47ms TimeCoverageRelationStatistics Valid=726, Invalid=12378, Unknown=10, NotChecked=226, Total=13340 [2021-08-30 18:27:17,447 INFO L928 BasicCegarLoop]: 10 mSDtfsCounter, 355 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 3249 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1260.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 4806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.29ms SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 3249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1499 IncrementalHoareTripleChecker+Unchecked, 1495.58ms IncrementalHoareTripleChecker+Time [2021-08-30 18:27:17,447 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 152 Invalid, 4806 Unknown, 0 Unchecked, 12.29ms Time], IncrementalHoareTripleChecker [58 Valid, 3249 Invalid, 0 Unknown, 1499 Unchecked, 1495.58ms Time] [2021-08-30 18:27:17,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-08-30 18:27:17,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 119. [2021-08-30 18:27:17,450 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) [2021-08-30 18:27:17,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 124 transitions. [2021-08-30 18:27:17,451 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 124 transitions. Word has length 80 [2021-08-30 18:27:17,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:27:17,451 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 124 transitions. [2021-08-30 18:27:17,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 86 states have (on average 1.930232558139535) internal successors, (166), 66 states have internal predecessors, (166), 11 states have call successors, (22), 14 states have call predecessors, (22), 16 states have return successors, (19), 16 states have call predecessors, (19), 11 states have call successors, (19) [2021-08-30 18:27:17,452 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 124 transitions. [2021-08-30 18:27:17,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-08-30 18:27:17,452 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:27:17,453 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 18:27:17,472 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-08-30 18:27:17,660 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 [2021-08-30 18:27:17,661 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-08-30 18:27:17,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:27:17,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1374254630, now seen corresponding path program 1 times [2021-08-30 18:27:17,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:27:17,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042546865] [2021-08-30 18:27:17,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:27:17,663 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:27:17,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:27:17,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:27:17,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:27:17,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 18:27:17,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:27:17,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-08-30 18:27:17,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:27:17,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-30 18:27:17,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:27:17,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-08-30 18:27:17,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:27:17,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-08-30 18:27:17,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:27:17,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-08-30 18:27:17,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:27:17,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-08-30 18:27:17,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:27:17,772 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-08-30 18:27:17,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:27:17,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042546865] [2021-08-30 18:27:17,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042546865] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 18:27:17,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105821964] [2021-08-30 18:27:17,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:27:17,774 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 18:27:17,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 18:27:17,775 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) [2021-08-30 18:27:17,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-30 18:27:17,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:27:17,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-30 18:27:17,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 18:27:18,017 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-08-30 18:27:18,017 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-30 18:27:18,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105821964] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 18:27:18,017 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-30 18:27:18,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2021-08-30 18:27:18,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899285592] [2021-08-30 18:27:18,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-30 18:27:18,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:27:18,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-30 18:27:18,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-08-30 18:27:18,019 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) [2021-08-30 18:27:18,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:27:18,244 INFO L93 Difference]: Finished difference Result 123 states and 127 transitions. [2021-08-30 18:27:18,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-30 18:27:18,245 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 [2021-08-30 18:27:18,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:27:18,245 INFO L225 Difference]: With dead ends: 123 [2021-08-30 18:27:18,245 INFO L226 Difference]: Without dead ends: 119 [2021-08-30 18:27:18,246 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 61.88ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-08-30 18:27:18,246 INFO L928 BasicCegarLoop]: 18 mSDtfsCounter, 16 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 162.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.29ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 210.52ms IncrementalHoareTripleChecker+Time [2021-08-30 18:27:18,246 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 78 Invalid, 417 Unknown, 0 Unchecked, 1.29ms Time], IncrementalHoareTripleChecker [3 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 210.52ms Time] [2021-08-30 18:27:18,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-08-30 18:27:18,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2021-08-30 18:27:18,248 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) [2021-08-30 18:27:18,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 123 transitions. [2021-08-30 18:27:18,249 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 123 transitions. Word has length 83 [2021-08-30 18:27:18,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:27:18,249 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 123 transitions. [2021-08-30 18:27:18,249 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) [2021-08-30 18:27:18,249 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 123 transitions. [2021-08-30 18:27:18,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-08-30 18:27:18,258 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:27:18,258 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 18:27:18,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-30 18:27:18,458 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 [2021-08-30 18:27:18,459 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)] === [2021-08-30 18:27:18,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:27:18,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1568155867, now seen corresponding path program 2 times [2021-08-30 18:27:18,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:27:18,459 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960717315] [2021-08-30 18:27:18,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:27:18,459 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:27:18,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:27:18,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:27:18,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:27:18,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 18:27:18,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:27:18,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-08-30 18:27:18,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:27:18,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-30 18:27:18,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:27:18,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-08-30 18:27:18,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:27:18,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-08-30 18:27:18,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:27:18,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-08-30 18:27:18,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:27:18,570 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-08-30 18:27:18,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:27:18,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960717315] [2021-08-30 18:27:18,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960717315] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 18:27:18,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031736040] [2021-08-30 18:27:18,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 18:27:18,571 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 18:27:18,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 18:27:18,572 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) [2021-08-30 18:27:18,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-30 18:27:18,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-30 18:27:18,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 18:27:18,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-30 18:27:18,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 18:27:18,859 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-08-30 18:27:18,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 18:27:19,003 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-08-30 18:27:19,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031736040] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 18:27:19,004 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 18:27:19,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 11 [2021-08-30 18:27:19,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849697713] [2021-08-30 18:27:19,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-30 18:27:19,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:27:19,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-30 18:27:19,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-08-30 18:27:19,005 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) [2021-08-30 18:27:19,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:27:19,438 INFO L93 Difference]: Finished difference Result 129 states and 132 transitions. [2021-08-30 18:27:19,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-30 18:27:19,438 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 [2021-08-30 18:27:19,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:27:19,439 INFO L225 Difference]: With dead ends: 129 [2021-08-30 18:27:19,439 INFO L226 Difference]: Without dead ends: 129 [2021-08-30 18:27:19,439 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 156.46ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-08-30 18:27:19,440 INFO L928 BasicCegarLoop]: 15 mSDtfsCounter, 121 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 268.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.36ms SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 317.51ms IncrementalHoareTripleChecker+Time [2021-08-30 18:27:19,440 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 102 Invalid, 714 Unknown, 0 Unchecked, 2.36ms Time], IncrementalHoareTripleChecker [36 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 317.51ms Time] [2021-08-30 18:27:19,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-08-30 18:27:19,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 110. [2021-08-30 18:27:19,443 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) [2021-08-30 18:27:19,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2021-08-30 18:27:19,444 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 83 [2021-08-30 18:27:19,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:27:19,444 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2021-08-30 18:27:19,445 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) [2021-08-30 18:27:19,445 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2021-08-30 18:27:19,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-08-30 18:27:19,445 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:27:19,446 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 18:27:19,485 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-08-30 18:27:19,665 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 [2021-08-30 18:27:19,665 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-08-30 18:27:19,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:27:19,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1923018073, now seen corresponding path program 1 times [2021-08-30 18:27:19,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:27:19,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137725689] [2021-08-30 18:27:19,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:27:19,666 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:27:19,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:27:19,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:27:19,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:27:19,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 18:27:19,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:27:20,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-08-30 18:27:20,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:27:20,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-30 18:27:20,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:27:20,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-08-30 18:27:20,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:27:20,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-08-30 18:27:20,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:27:20,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-08-30 18:27:20,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:27:20,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-08-30 18:27:20,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:27:21,078 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-30 18:27:21,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:27:21,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137725689] [2021-08-30 18:27:21,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137725689] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 18:27:21,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612704501] [2021-08-30 18:27:21,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:27:21,079 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 18:27:21,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 18:27:21,080 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) [2021-08-30 18:27:21,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-30 18:27:21,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:27:21,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 110 conjunts are in the unsatisfiable core [2021-08-30 18:27:21,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 18:27:21,211 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 [2021-08-30 18:27:21,479 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-30 18:27:21,479 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 [2021-08-30 18:27:21,568 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 [2021-08-30 18:27:21,625 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-08-30 18:27:21,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2021-08-30 18:27:21,766 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-08-30 18:27:21,767 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 [2021-08-30 18:27:21,854 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-08-30 18:27:21,854 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 [2021-08-30 18:27:23,001 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 [2021-08-30 18:27:23,034 INFO L354 Elim1Store]: treesize reduction 138, result has 15.9 percent of original size [2021-08-30 18:27:23,034 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 [2021-08-30 18:27:23,404 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 [2021-08-30 18:27:23,523 INFO L354 Elim1Store]: treesize reduction 172, result has 17.3 percent of original size [2021-08-30 18:27:23,524 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 132 treesize of output 114 [2021-08-30 18:27:23,532 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-08-30 18:27:23,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 89 [2021-08-30 18:27:25,712 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~s~0.offset_BEFORE_CALL_27 Int) (v_main_~s~0.base_BEFORE_CALL_27 Int)) (let ((.cse1 (select |c_#memory_$Pointer$.base| v_main_~s~0.base_BEFORE_CALL_27))) (let ((.cse0 (select .cse1 v_main_~s~0.offset_BEFORE_CALL_27))) (and (= .cse0 (select .cse1 (+ v_main_~s~0.offset_BEFORE_CALL_27 4))) (not (= .cse0 v_main_~s~0.base_BEFORE_CALL_27)))))) is different from true [2021-08-30 18:27:28,007 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~s~0.offset_BEFORE_CALL_28 Int) (v_main_~s~0.base_BEFORE_CALL_28 Int)) (let ((.cse1 (select |c_#memory_$Pointer$.base| v_main_~s~0.base_BEFORE_CALL_28))) (let ((.cse0 (select .cse1 v_main_~s~0.offset_BEFORE_CALL_28))) (and (= .cse0 (select .cse1 (+ v_main_~s~0.offset_BEFORE_CALL_28 4))) (not (= .cse0 v_main_~s~0.base_BEFORE_CALL_28)))))) is different from true [2021-08-30 18:27:42,589 INFO L354 Elim1Store]: treesize reduction 36, result has 53.2 percent of original size [2021-08-30 18:27:42,590 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 77 treesize of output 81 [2021-08-30 18:27:42,592 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 [2021-08-30 18:27:42,594 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 67 treesize of output 55 [2021-08-30 18:27:42,614 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 9 not checked. [2021-08-30 18:27:42,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 18:27:47,483 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 246 treesize of output 218 [2021-08-30 18:27:47,513 INFO L354 Elim1Store]: treesize reduction 52, result has 29.7 percent of original size [2021-08-30 18:27:47,513 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 2 case distinctions, treesize of input 266 treesize of output 222 [2021-08-30 18:27:47,516 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 202 treesize of output 182 [2021-08-30 18:27:47,766 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 166 treesize of output 138 [2021-08-30 18:27:49,155 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_dll_circular_update_at_~head.offset_71 Int)) (or (< v_dll_circular_update_at_~head.offset_71 c_main_~s~0.offset) (and (< c_main_~i~0 1) (forall ((v_DerPreprocessor_15 Int)) (not (= (select (store (select |c_#memory_$Pointer$.base| c_main_~s~0.base) (+ v_dll_circular_update_at_~head.offset_71 8) v_DerPreprocessor_15) c_main_~s~0.offset) c_main_~s~0.base))) (<= 0 c_main_~i~0)))) is different from false [2021-08-30 18:27:49,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612704501] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 18:27:49,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-30 18:27:49,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 75 [2021-08-30 18:27:49,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858528316] [2021-08-30 18:27:49,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-08-30 18:27:49,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:27:49,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-08-30 18:27:49,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=7567, Unknown=8, NotChecked=708, Total=8556 [2021-08-30 18:27:49,159 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) [2021-08-30 18:28:17,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:28:17,342 INFO L93 Difference]: Finished difference Result 127 states and 130 transitions. [2021-08-30 18:28:17,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-30 18:28:17,343 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 [2021-08-30 18:28:17,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:28:17,344 INFO L225 Difference]: With dead ends: 127 [2021-08-30 18:28:17,344 INFO L226 Difference]: Without dead ends: 127 [2021-08-30 18:28:17,345 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 80 SyntacticMatches, 8 SemanticMatches, 120 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 2377 ImplicationChecksByTransitivity, 54637.88ms TimeCoverageRelationStatistics Valid=528, Invalid=13281, Unknown=13, NotChecked=940, Total=14762 [2021-08-30 18:28:17,345 INFO L928 BasicCegarLoop]: 13 mSDtfsCounter, 224 mSDsluCounter, 716 mSDsCounter, 0 mSdLazyCounter, 2893 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1073.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 4412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.91ms SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 2893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1455 IncrementalHoareTripleChecker+Unchecked, 1255.74ms IncrementalHoareTripleChecker+Time [2021-08-30 18:28:17,345 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 288 Invalid, 4412 Unknown, 0 Unchecked, 9.91ms Time], IncrementalHoareTripleChecker [64 Valid, 2893 Invalid, 0 Unknown, 1455 Unchecked, 1255.74ms Time] [2021-08-30 18:28:17,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-08-30 18:28:17,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 108. [2021-08-30 18:28:17,348 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) [2021-08-30 18:28:17,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2021-08-30 18:28:17,348 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 86 [2021-08-30 18:28:17,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:28:17,349 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2021-08-30 18:28:17,349 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) [2021-08-30 18:28:17,349 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2021-08-30 18:28:17,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-08-30 18:28:17,350 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:28:17,350 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 18:28:17,368 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-08-30 18:28:17,557 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 [2021-08-30 18:28:17,558 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)] === [2021-08-30 18:28:17,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:28:17,558 INFO L82 PathProgramCache]: Analyzing trace with hash -485575403, now seen corresponding path program 1 times [2021-08-30 18:28:17,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:28:17,559 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729067750] [2021-08-30 18:28:17,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:28:17,559 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:28:17,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:28:17,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:28:17,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:28:17,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 18:28:17,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:28:17,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-08-30 18:28:17,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:28:17,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-30 18:28:17,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:28:17,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-08-30 18:28:17,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:28:17,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-08-30 18:28:17,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:28:17,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-08-30 18:28:17,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:28:17,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-08-30 18:28:17,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:28:17,675 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-08-30 18:28:17,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:28:17,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729067750] [2021-08-30 18:28:17,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729067750] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 18:28:17,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507708450] [2021-08-30 18:28:17,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:28:17,676 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 18:28:17,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 18:28:17,677 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) [2021-08-30 18:28:17,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-30 18:28:17,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:28:17,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-30 18:28:17,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 18:28:17,868 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 [2021-08-30 18:28:18,136 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-08-30 18:28:18,136 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-30 18:28:18,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507708450] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 18:28:18,137 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-30 18:28:18,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [9] total 17 [2021-08-30 18:28:18,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679788782] [2021-08-30 18:28:18,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-30 18:28:18,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:28:18,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-30 18:28:18,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-08-30 18:28:18,138 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) [2021-08-30 18:28:18,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:28:18,417 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2021-08-30 18:28:18,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-30 18:28:18,417 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 [2021-08-30 18:28:18,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:28:18,418 INFO L225 Difference]: With dead ends: 128 [2021-08-30 18:28:18,418 INFO L226 Difference]: Without dead ends: 128 [2021-08-30 18:28:18,419 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 88 SyntacticMatches, 7 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 202.21ms TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-08-30 18:28:18,419 INFO L928 BasicCegarLoop]: 12 mSDtfsCounter, 70 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 195.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.55ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 237.18ms IncrementalHoareTripleChecker+Time [2021-08-30 18:28:18,419 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 61 Invalid, 690 Unknown, 0 Unchecked, 1.55ms Time], IncrementalHoareTripleChecker [4 Valid, 635 Invalid, 0 Unknown, 51 Unchecked, 237.18ms Time] [2021-08-30 18:28:18,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-08-30 18:28:18,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 111. [2021-08-30 18:28:18,422 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) [2021-08-30 18:28:18,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 116 transitions. [2021-08-30 18:28:18,422 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 116 transitions. Word has length 91 [2021-08-30 18:28:18,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:28:18,423 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 116 transitions. [2021-08-30 18:28:18,423 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) [2021-08-30 18:28:18,423 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 116 transitions. [2021-08-30 18:28:18,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-08-30 18:28:18,424 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:28:18,424 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 18:28:18,445 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-08-30 18:28:18,636 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 [2021-08-30 18:28:18,637 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)] === [2021-08-30 18:28:18,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:28:18,637 INFO L82 PathProgramCache]: Analyzing trace with hash -485575402, now seen corresponding path program 1 times [2021-08-30 18:28:18,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:28:18,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383123965] [2021-08-30 18:28:18,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:28:18,638 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:28:18,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:28:18,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:28:18,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:28:18,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 18:28:18,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:28:18,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-08-30 18:28:18,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:28:18,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-30 18:28:18,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:28:18,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-08-30 18:28:18,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:28:18,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-08-30 18:28:18,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:28:18,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-08-30 18:28:18,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:28:18,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-08-30 18:28:18,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:28:18,896 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-08-30 18:28:18,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:28:18,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383123965] [2021-08-30 18:28:18,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383123965] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 18:28:18,897 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:28:18,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-08-30 18:28:18,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169274436] [2021-08-30 18:28:18,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-30 18:28:18,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:28:18,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-30 18:28:18,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-08-30 18:28:18,898 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) [2021-08-30 18:28:19,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:28:19,445 INFO L93 Difference]: Finished difference Result 122 states and 125 transitions. [2021-08-30 18:28:19,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-30 18:28:19,445 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 [2021-08-30 18:28:19,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:28:19,446 INFO L225 Difference]: With dead ends: 122 [2021-08-30 18:28:19,446 INFO L226 Difference]: Without dead ends: 122 [2021-08-30 18:28:19,446 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 253.79ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-08-30 18:28:19,447 INFO L928 BasicCegarLoop]: 12 mSDtfsCounter, 212 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 941 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 342.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.82ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 405.25ms IncrementalHoareTripleChecker+Time [2021-08-30 18:28:19,447 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 54 Invalid, 971 Unknown, 0 Unchecked, 2.82ms Time], IncrementalHoareTripleChecker [30 Valid, 941 Invalid, 0 Unknown, 0 Unchecked, 405.25ms Time] [2021-08-30 18:28:19,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-08-30 18:28:19,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 109. [2021-08-30 18:28:19,449 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) [2021-08-30 18:28:19,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 113 transitions. [2021-08-30 18:28:19,450 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 113 transitions. Word has length 91 [2021-08-30 18:28:19,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:28:19,450 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 113 transitions. [2021-08-30 18:28:19,450 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) [2021-08-30 18:28:19,451 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 113 transitions. [2021-08-30 18:28:19,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-08-30 18:28:19,451 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:28:19,451 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 18:28:19,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-08-30 18:28:19,452 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)] === [2021-08-30 18:28:19,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:28:19,452 INFO L82 PathProgramCache]: Analyzing trace with hash -326841515, now seen corresponding path program 1 times [2021-08-30 18:28:19,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:28:19,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951652699] [2021-08-30 18:28:19,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:28:19,453 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:28:19,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:28:19,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:28:19,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:28:19,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 18:28:19,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:28:19,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-08-30 18:28:19,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:28:19,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-30 18:28:19,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:28:19,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-08-30 18:28:19,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:28:19,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-08-30 18:28:19,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:28:19,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-08-30 18:28:19,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:28:19,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-08-30 18:28:19,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:28:19,622 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-08-30 18:28:19,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:28:19,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951652699] [2021-08-30 18:28:19,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951652699] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 18:28:19,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092168485] [2021-08-30 18:28:19,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:28:19,622 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 18:28:19,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 18:28:19,623 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) [2021-08-30 18:28:19,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-30 18:28:19,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:28:19,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 52 conjunts are in the unsatisfiable core [2021-08-30 18:28:19,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 18:28:20,067 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 [2021-08-30 18:28:20,073 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-08-30 18:28:20,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 18:28:20,232 INFO L354 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2021-08-30 18:28:20,232 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 16 treesize of output 15 [2021-08-30 18:28:20,293 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-08-30 18:28:20,293 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 11 treesize of output 11 [2021-08-30 18:28:20,507 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-08-30 18:28:20,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092168485] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 18:28:20,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 18:28:20,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18, 10] total 31 [2021-08-30 18:28:20,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144374894] [2021-08-30 18:28:20,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-30 18:28:20,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:28:20,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-30 18:28:20,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=916, Unknown=0, NotChecked=0, Total=992 [2021-08-30 18:28:20,510 INFO L87 Difference]: Start difference. First operand 109 states and 113 transitions. Second operand has 32 states, 31 states have (on average 3.6774193548387095) internal successors, (114), 24 states have internal predecessors, (114), 5 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (13), 7 states have call predecessors, (13), 2 states have call successors, (13) [2021-08-30 18:28:21,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:28:21,635 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2021-08-30 18:28:21,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-30 18:28:21,635 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.6774193548387095) internal successors, (114), 24 states have internal predecessors, (114), 5 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (13), 7 states have call predecessors, (13), 2 states have call successors, (13) Word has length 94 [2021-08-30 18:28:21,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:28:21,636 INFO L225 Difference]: With dead ends: 122 [2021-08-30 18:28:21,636 INFO L226 Difference]: Without dead ends: 122 [2021-08-30 18:28:21,636 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 720.39ms TimeCoverageRelationStatistics Valid=194, Invalid=1876, Unknown=0, NotChecked=0, Total=2070 [2021-08-30 18:28:21,637 INFO L928 BasicCegarLoop]: 13 mSDtfsCounter, 182 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 1922 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 636.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 1956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.33ms SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 764.53ms IncrementalHoareTripleChecker+Time [2021-08-30 18:28:21,637 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 228 Invalid, 1956 Unknown, 0 Unchecked, 5.33ms Time], IncrementalHoareTripleChecker [34 Valid, 1922 Invalid, 0 Unknown, 0 Unchecked, 764.53ms Time] [2021-08-30 18:28:21,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-08-30 18:28:21,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 109. [2021-08-30 18:28:21,639 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) [2021-08-30 18:28:21,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 114 transitions. [2021-08-30 18:28:21,640 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 114 transitions. Word has length 94 [2021-08-30 18:28:21,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:28:21,640 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 114 transitions. [2021-08-30 18:28:21,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.6774193548387095) internal successors, (114), 24 states have internal predecessors, (114), 5 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (13), 7 states have call predecessors, (13), 2 states have call successors, (13) [2021-08-30 18:28:21,641 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 114 transitions. [2021-08-30 18:28:21,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-08-30 18:28:21,641 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:28:21,641 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 18:28:21,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-30 18:28:21,864 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 [2021-08-30 18:28:21,865 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)] === [2021-08-30 18:28:21,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:28:21,865 INFO L82 PathProgramCache]: Analyzing trace with hash -326841514, now seen corresponding path program 1 times [2021-08-30 18:28:21,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:28:21,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995576630] [2021-08-30 18:28:21,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:28:21,866 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:28:21,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:28:22,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:28:22,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:28:22,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 18:28:22,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:28:22,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-08-30 18:28:22,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:28:22,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-30 18:28:22,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:28:22,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-08-30 18:28:22,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:28:22,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-08-30 18:28:22,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:28:22,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-08-30 18:28:22,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:28:22,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-08-30 18:28:22,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:28:22,984 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-30 18:28:22,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:28:22,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995576630] [2021-08-30 18:28:22,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995576630] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 18:28:22,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137691154] [2021-08-30 18:28:22,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:28:22,985 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 18:28:22,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 18:28:22,986 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) [2021-08-30 18:28:22,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-30 18:28:23,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:28:23,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 119 conjunts are in the unsatisfiable core [2021-08-30 18:28:23,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 18:28:23,132 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 [2021-08-30 18:28:23,436 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-30 18:28:23,436 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 [2021-08-30 18:28:23,537 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 [2021-08-30 18:28:23,557 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 [2021-08-30 18:28:23,637 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 [2021-08-30 18:28:23,644 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 [2021-08-30 18:28:23,798 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 66 treesize of output 59 [2021-08-30 18:28:23,801 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 62 treesize of output 64 [2021-08-30 18:28:23,897 INFO L354 Elim1Store]: treesize reduction 120, result has 17.8 percent of original size [2021-08-30 18:28:23,897 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 [2021-08-30 18:28:23,918 INFO L354 Elim1Store]: treesize reduction 148, result has 18.7 percent of original size [2021-08-30 18:28:23,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 129 treesize of output 107 [2021-08-30 18:28:25,462 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 [2021-08-30 18:28:25,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-30 18:28:25,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-30 18:28:25,525 INFO L354 Elim1Store]: treesize reduction 220, result has 16.3 percent of original size [2021-08-30 18:28:25,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 133 treesize of output 126 [2021-08-30 18:28:25,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-30 18:28:25,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-30 18:28:25,558 INFO L354 Elim1Store]: treesize reduction 166, result has 15.7 percent of original size [2021-08-30 18:28:25,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 114 treesize of output 80 [2021-08-30 18:28:26,461 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 [2021-08-30 18:28:26,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-30 18:28:26,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-30 18:28:26,482 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-08-30 18:28:26,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 123 treesize of output 66 [2021-08-30 18:28:26,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-30 18:28:26,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-30 18:28:26,517 INFO L354 Elim1Store]: treesize reduction 154, result has 21.8 percent of original size [2021-08-30 18:28:26,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 54 treesize of output 59 [2021-08-30 18:28:40,964 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 [2021-08-30 18:28:40,968 INFO L354 Elim1Store]: treesize reduction 62, result has 1.6 percent of original size [2021-08-30 18:28:40,968 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 [2021-08-30 18:28:41,077 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 2 not checked. [2021-08-30 18:28:41,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 18:28:41,449 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 15 treesize of output 11 [2021-08-30 18:28:41,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-08-30 18:28:41,603 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 18:28:41,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2021-08-30 18:28:41,786 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-08-30 18:28:41,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-08-30 18:28:42,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137691154] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 18:28:42,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-30 18:28:42,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 71 [2021-08-30 18:28:42,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572498245] [2021-08-30 18:28:42,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-08-30 18:28:42,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:28:42,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-08-30 18:28:42,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=6220, Unknown=6, NotChecked=318, Total=6806 [2021-08-30 18:28:42,625 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) [2021-08-30 18:29:02,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:29:02,738 INFO L93 Difference]: Finished difference Result 118 states and 121 transitions. [2021-08-30 18:29:02,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-30 18:29:02,739 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 [2021-08-30 18:29:02,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:29:02,740 INFO L225 Difference]: With dead ends: 118 [2021-08-30 18:29:02,740 INFO L226 Difference]: Without dead ends: 118 [2021-08-30 18:29:02,741 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 93 SyntacticMatches, 4 SemanticMatches, 104 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2364 ImplicationChecksByTransitivity, 36860.97ms TimeCoverageRelationStatistics Valid=499, Invalid=10209, Unknown=12, NotChecked=410, Total=11130 [2021-08-30 18:29:02,741 INFO L928 BasicCegarLoop]: 10 mSDtfsCounter, 201 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 2551 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 994.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 3297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.20ms SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 2551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 670 IncrementalHoareTripleChecker+Unchecked, 1167.39ms IncrementalHoareTripleChecker+Time [2021-08-30 18:29:02,741 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 213 Invalid, 3297 Unknown, 0 Unchecked, 10.20ms Time], IncrementalHoareTripleChecker [76 Valid, 2551 Invalid, 0 Unknown, 670 Unchecked, 1167.39ms Time] [2021-08-30 18:29:02,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-08-30 18:29:02,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 111. [2021-08-30 18:29:02,744 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) [2021-08-30 18:29:02,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 115 transitions. [2021-08-30 18:29:02,744 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 115 transitions. Word has length 94 [2021-08-30 18:29:02,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:29:02,745 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 115 transitions. [2021-08-30 18:29:02,745 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) [2021-08-30 18:29:02,745 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 115 transitions. [2021-08-30 18:29:02,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-08-30 18:29:02,746 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:29:02,746 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 18:29:02,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-30 18:29:02,946 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 [2021-08-30 18:29:02,947 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting mainErr1ENSURES_VIOLATIONMEMORY_LEAK === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-08-30 18:29:02,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:29:02,947 INFO L82 PathProgramCache]: Analyzing trace with hash -294350775, now seen corresponding path program 1 times [2021-08-30 18:29:02,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:29:02,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252162096] [2021-08-30 18:29:02,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:29:02,947 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:29:02,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:29:02,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:29:02,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:29:03,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 18:29:03,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:29:03,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-08-30 18:29:03,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:29:03,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-30 18:29:03,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:29:03,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-08-30 18:29:03,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:29:03,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-08-30 18:29:03,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:29:03,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-08-30 18:29:03,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:29:03,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-08-30 18:29:03,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:29:03,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-08-30 18:29:03,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:29:03,141 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-08-30 18:29:03,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:29:03,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252162096] [2021-08-30 18:29:03,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252162096] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 18:29:03,142 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:29:03,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-08-30 18:29:03,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847951410] [2021-08-30 18:29:03,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-30 18:29:03,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:29:03,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-30 18:29:03,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-08-30 18:29:03,143 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) [2021-08-30 18:29:03,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:29:03,593 INFO L93 Difference]: Finished difference Result 117 states and 119 transitions. [2021-08-30 18:29:03,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-30 18:29:03,593 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 [2021-08-30 18:29:03,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:29:03,594 INFO L225 Difference]: With dead ends: 117 [2021-08-30 18:29:03,594 INFO L226 Difference]: Without dead ends: 115 [2021-08-30 18:29:03,594 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 214.03ms TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-08-30 18:29:03,595 INFO L928 BasicCegarLoop]: 14 mSDtfsCounter, 157 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 909 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 284.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.58ms SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 342.68ms IncrementalHoareTripleChecker+Time [2021-08-30 18:29:03,595 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 154 Invalid, 935 Unknown, 0 Unchecked, 2.58ms Time], IncrementalHoareTripleChecker [26 Valid, 909 Invalid, 0 Unknown, 0 Unchecked, 342.68ms Time] [2021-08-30 18:29:03,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-08-30 18:29:03,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2021-08-30 18:29:03,597 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) [2021-08-30 18:29:03,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 114 transitions. [2021-08-30 18:29:03,598 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 114 transitions. Word has length 94 [2021-08-30 18:29:03,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:29:03,598 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 114 transitions. [2021-08-30 18:29:03,599 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) [2021-08-30 18:29:03,599 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 114 transitions. [2021-08-30 18:29:03,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-08-30 18:29:03,599 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:29:03,599 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 18:29:03,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-08-30 18:29:03,600 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)] === [2021-08-30 18:29:03,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:29:03,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1542153700, now seen corresponding path program 1 times [2021-08-30 18:29:03,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:29:03,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54124661] [2021-08-30 18:29:03,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:29:03,601 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:29:03,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:29:03,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:29:03,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:29:03,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 18:29:03,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:29:03,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-08-30 18:29:03,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:29:03,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-30 18:29:03,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:29:03,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-08-30 18:29:03,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:29:03,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-08-30 18:29:03,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:29:03,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-08-30 18:29:03,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:29:03,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-08-30 18:29:03,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:29:03,780 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-08-30 18:29:03,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:29:03,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54124661] [2021-08-30 18:29:03,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54124661] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 18:29:03,780 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:29:03,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-08-30 18:29:03,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673123500] [2021-08-30 18:29:03,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-30 18:29:03,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:29:03,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-30 18:29:03,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-08-30 18:29:03,781 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) [2021-08-30 18:29:04,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:29:04,280 INFO L93 Difference]: Finished difference Result 113 states and 115 transitions. [2021-08-30 18:29:04,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-30 18:29:04,281 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 [2021-08-30 18:29:04,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:29:04,281 INFO L225 Difference]: With dead ends: 113 [2021-08-30 18:29:04,281 INFO L226 Difference]: Without dead ends: 113 [2021-08-30 18:29:04,282 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 203.19ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-08-30 18:29:04,282 INFO L928 BasicCegarLoop]: 14 mSDtfsCounter, 165 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 886 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 319.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.35ms SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 382.79ms IncrementalHoareTripleChecker+Time [2021-08-30 18:29:04,282 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 78 Invalid, 914 Unknown, 0 Unchecked, 2.35ms Time], IncrementalHoareTripleChecker [28 Valid, 886 Invalid, 0 Unknown, 0 Unchecked, 382.79ms Time] [2021-08-30 18:29:04,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-08-30 18:29:04,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 110. [2021-08-30 18:29:04,285 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) [2021-08-30 18:29:04,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2021-08-30 18:29:04,286 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 95 [2021-08-30 18:29:04,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:29:04,286 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2021-08-30 18:29:04,286 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) [2021-08-30 18:29:04,286 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2021-08-30 18:29:04,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-08-30 18:29:04,287 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:29:04,287 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 18:29:04,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-08-30 18:29:04,287 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)] === [2021-08-30 18:29:04,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:29:04,288 INFO L82 PathProgramCache]: Analyzing trace with hash -244564319, now seen corresponding path program 1 times [2021-08-30 18:29:04,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:29:04,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538757632] [2021-08-30 18:29:04,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:29:04,289 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:29:04,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:29:04,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:29:04,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:29:04,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 18:29:04,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:29:04,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-08-30 18:29:04,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:29:04,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-30 18:29:04,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:29:04,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-08-30 18:29:04,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:29:04,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-08-30 18:29:05,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:29:05,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-08-30 18:29:05,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:29:05,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-08-30 18:29:05,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:29:05,142 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-08-30 18:29:05,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:29:05,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538757632] [2021-08-30 18:29:05,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538757632] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 18:29:05,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833974458] [2021-08-30 18:29:05,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:29:05,143 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 18:29:05,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 18:29:05,150 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) [2021-08-30 18:29:05,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-30 18:29:05,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:29:05,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 87 conjunts are in the unsatisfiable core [2021-08-30 18:29:05,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 18:29:05,324 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 [2021-08-30 18:29:05,516 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 [2021-08-30 18:29:05,612 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-30 18:29:05,613 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 [2021-08-30 18:29:05,704 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 [2021-08-30 18:29:05,768 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 [2021-08-30 18:29:05,903 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-08-30 18:29:05,903 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 [2021-08-30 18:29:05,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-30 18:29:05,966 INFO L354 Elim1Store]: treesize reduction 49, result has 15.5 percent of original size [2021-08-30 18:29:05,966 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 [2021-08-30 18:29:06,252 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-08-30 18:29:06,253 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 [2021-08-30 18:29:07,172 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 [2021-08-30 18:29:07,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-30 18:29:07,211 INFO L354 Elim1Store]: treesize reduction 128, result has 16.9 percent of original size [2021-08-30 18:29:07,212 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 [2021-08-30 18:29:07,298 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-08-30 18:29:07,299 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 [2021-08-30 18:29:08,075 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 [2021-08-30 18:29:08,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-30 18:29:08,110 INFO L354 Elim1Store]: treesize reduction 130, result has 19.8 percent of original size [2021-08-30 18:29:08,110 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 [2021-08-30 18:29:09,016 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-30 18:29:09,016 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 42 treesize of output 20 [2021-08-30 18:29:09,073 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 18 trivial. 2 not checked. [2021-08-30 18:29:09,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 18:29:21,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833974458] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 18:29:21,783 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-30 18:29:21,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 55 [2021-08-30 18:29:21,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268205224] [2021-08-30 18:29:21,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-08-30 18:29:21,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:29:21,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-08-30 18:29:21,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=2892, Unknown=11, NotChecked=218, Total=3306 [2021-08-30 18:29:21,785 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) [2021-08-30 18:29:31,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:29:31,771 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2021-08-30 18:29:31,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-30 18:29:31,772 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 [2021-08-30 18:29:31,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:29:31,773 INFO L225 Difference]: With dead ends: 114 [2021-08-30 18:29:31,773 INFO L226 Difference]: Without dead ends: 114 [2021-08-30 18:29:31,773 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 114 SyntacticMatches, 9 SemanticMatches, 77 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1289 ImplicationChecksByTransitivity, 25150.19ms TimeCoverageRelationStatistics Valid=502, Invalid=5345, Unknown=13, NotChecked=302, Total=6162 [2021-08-30 18:29:31,774 INFO L928 BasicCegarLoop]: 10 mSDtfsCounter, 195 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 1633 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 619.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 2134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.48ms SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 439 IncrementalHoareTripleChecker+Unchecked, 727.76ms IncrementalHoareTripleChecker+Time [2021-08-30 18:29:31,774 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 95 Invalid, 2134 Unknown, 0 Unchecked, 4.48ms Time], IncrementalHoareTripleChecker [62 Valid, 1633 Invalid, 0 Unknown, 439 Unchecked, 727.76ms Time] [2021-08-30 18:29:31,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-08-30 18:29:31,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 111. [2021-08-30 18:29:31,776 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) [2021-08-30 18:29:31,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2021-08-30 18:29:31,777 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 97 [2021-08-30 18:29:31,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:29:31,777 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2021-08-30 18:29:31,777 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) [2021-08-30 18:29:31,778 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2021-08-30 18:29:31,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-08-30 18:29:31,778 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:29:31,778 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-08-30 18:29:31,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-30 18:29:31,981 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 [2021-08-30 18:29:31,982 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)] === [2021-08-30 18:29:31,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:29:31,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1550879142, now seen corresponding path program 1 times [2021-08-30 18:29:31,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:29:31,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202512434] [2021-08-30 18:29:31,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:29:31,984 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:29:32,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:29:32,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:29:32,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:29:32,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 18:29:32,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:29:32,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-08-30 18:29:32,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:29:32,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-30 18:29:32,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:29:32,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-08-30 18:29:32,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:29:32,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-08-30 18:29:32,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:29:33,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-08-30 18:29:33,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:29:33,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-08-30 18:29:33,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:29:33,189 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-08-30 18:29:33,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:29:33,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202512434] [2021-08-30 18:29:33,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202512434] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 18:29:33,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653041854] [2021-08-30 18:29:33,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:29:33,190 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 18:29:33,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 18:29:33,193 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) [2021-08-30 18:29:33,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-30 18:29:33,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:29:33,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 118 conjunts are in the unsatisfiable core [2021-08-30 18:29:33,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 18:29:33,353 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 [2021-08-30 18:29:33,701 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-30 18:29:33,702 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 [2021-08-30 18:29:33,820 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 [2021-08-30 18:29:33,902 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 [2021-08-30 18:29:34,043 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 [2021-08-30 18:29:34,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-30 18:29:34,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-30 18:29:34,120 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-30 18:29:34,121 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 [2021-08-30 18:29:34,439 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-30 18:29:34,439 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 [2021-08-30 18:29:44,430 INFO L354 Elim1Store]: treesize reduction 136, result has 17.6 percent of original size [2021-08-30 18:29:44,430 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 73 treesize of output 53 [2021-08-30 18:29:44,549 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-30 18:29:44,550 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 [2021-08-30 18:30:08,012 INFO L354 Elim1Store]: treesize reduction 140, result has 22.7 percent of original size [2021-08-30 18:30:08,012 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 120 treesize of output 106 [2021-08-30 18:30:08,022 INFO L354 Elim1Store]: treesize reduction 47, result has 13.0 percent of original size [2021-08-30 18:30:08,022 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 101 treesize of output 73 [2021-08-30 18:30:17,516 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 [2021-08-30 18:30:20,930 INFO L354 Elim1Store]: treesize reduction 48, result has 26.2 percent of original size [2021-08-30 18:30:20,931 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 [2021-08-30 18:30:23,590 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-08-30 18:30:23,590 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 [2021-08-30 18:30:23,663 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 9 refuted. 2 times theorem prover too weak. 17 trivial. 0 not checked. [2021-08-30 18:30:23,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 18:30:24,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653041854] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 18:30:24,930 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-30 18:30:24,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 73 [2021-08-30 18:30:24,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555434278] [2021-08-30 18:30:24,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-08-30 18:30:24,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:30:24,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-08-30 18:30:24,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=6503, Unknown=34, NotChecked=0, Total=6806 [2021-08-30 18:30:24,931 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) [2021-08-30 18:30:43,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:30:43,409 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2021-08-30 18:30:43,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-30 18:30:43,410 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 [2021-08-30 18:30:43,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:30:43,411 INFO L225 Difference]: With dead ends: 100 [2021-08-30 18:30:43,411 INFO L226 Difference]: Without dead ends: 100 [2021-08-30 18:30:43,412 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 83 SyntacticMatches, 6 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2234 ImplicationChecksByTransitivity, 66755.90ms TimeCoverageRelationStatistics Valid=630, Invalid=10668, Unknown=44, NotChecked=0, Total=11342 [2021-08-30 18:30:43,413 INFO L928 BasicCegarLoop]: 10 mSDtfsCounter, 124 mSDsluCounter, 931 mSDsCounter, 0 mSdLazyCounter, 2285 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 918.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 2839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.69ms SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 2285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 495 IncrementalHoareTripleChecker+Unchecked, 1087.80ms IncrementalHoareTripleChecker+Time [2021-08-30 18:30:43,413 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 180 Invalid, 2839 Unknown, 0 Unchecked, 6.69ms Time], IncrementalHoareTripleChecker [59 Valid, 2285 Invalid, 0 Unknown, 495 Unchecked, 1087.80ms Time] [2021-08-30 18:30:43,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-08-30 18:30:43,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2021-08-30 18:30:43,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 80 states have (on average 1.0125) internal successors, (81), 81 states have internal predecessors, (81), 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) [2021-08-30 18:30:43,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2021-08-30 18:30:43,417 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 100 [2021-08-30 18:30:43,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:30:43,418 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2021-08-30 18:30:43,418 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) [2021-08-30 18:30:43,418 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2021-08-30 18:30:43,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-08-30 18:30:43,419 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:30:43,419 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 18:30:43,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-30 18:30:43,631 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 [2021-08-30 18:30:43,631 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting dll_circular_destroyErr9ASSERT_VIOLATIONMEMORY_FREE === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-08-30 18:30:43,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:30:43,632 INFO L82 PathProgramCache]: Analyzing trace with hash -41244662, now seen corresponding path program 1 times [2021-08-30 18:30:43,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:30:43,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841484743] [2021-08-30 18:30:43,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:30:43,632 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:30:43,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:30:43,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:30:43,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:30:43,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 18:30:43,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:30:44,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-08-30 18:30:44,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:30:44,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-30 18:30:44,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:30:44,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-08-30 18:30:44,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:30:44,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-08-30 18:30:44,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:30:44,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-08-30 18:30:44,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:30:44,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-08-30 18:30:44,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:30:44,550 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-08-30 18:30:44,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:30:44,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841484743] [2021-08-30 18:30:44,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841484743] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 18:30:44,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322558298] [2021-08-30 18:30:44,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:30:44,551 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 18:30:44,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 18:30:44,552 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) [2021-08-30 18:30:44,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-30 18:30:44,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:30:44,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-30 18:30:44,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 18:30:45,028 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-30 18:30:45,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 26 [2021-08-30 18:30:45,168 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-08-30 18:30:45,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 18:30:45,539 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-08-30 18:30:45,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322558298] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 18:30:45,539 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 18:30:45,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 7, 7] total 45 [2021-08-30 18:30:45,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004780523] [2021-08-30 18:30:45,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-08-30 18:30:45,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:30:45,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-08-30 18:30:45,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1920, Unknown=0, NotChecked=0, Total=2070 [2021-08-30 18:30:45,541 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand has 46 states, 45 states have (on average 3.0444444444444443) internal successors, (137), 39 states have internal predecessors, (137), 5 states have call successors, (16), 5 states have call predecessors, (16), 6 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-08-30 18:30:47,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:30:47,117 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2021-08-30 18:30:47,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-30 18:30:47,117 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 3.0444444444444443) internal successors, (137), 39 states have internal predecessors, (137), 5 states have call successors, (16), 5 states have call predecessors, (16), 6 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 102 [2021-08-30 18:30:47,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:30:47,118 INFO L225 Difference]: With dead ends: 99 [2021-08-30 18:30:47,118 INFO L226 Difference]: Without dead ends: 99 [2021-08-30 18:30:47,118 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 202 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 1752.77ms TimeCoverageRelationStatistics Valid=354, Invalid=3806, Unknown=0, NotChecked=0, Total=4160 [2021-08-30 18:30:47,119 INFO L928 BasicCegarLoop]: 10 mSDtfsCounter, 166 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 1677 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 695.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 1766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.86ms SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 828.20ms IncrementalHoareTripleChecker+Time [2021-08-30 18:30:47,119 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 111 Invalid, 1766 Unknown, 0 Unchecked, 4.86ms Time], IncrementalHoareTripleChecker [69 Valid, 1677 Invalid, 0 Unknown, 20 Unchecked, 828.20ms Time] [2021-08-30 18:30:47,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-08-30 18:30:47,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-08-30 18:30:47,121 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) [2021-08-30 18:30:47,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2021-08-30 18:30:47,121 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 102 [2021-08-30 18:30:47,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:30:47,122 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2021-08-30 18:30:47,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 3.0444444444444443) internal successors, (137), 39 states have internal predecessors, (137), 5 states have call successors, (16), 5 states have call predecessors, (16), 6 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-08-30 18:30:47,122 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2021-08-30 18:30:47,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-08-30 18:30:47,123 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:30:47,123 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 18:30:47,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-30 18:30:47,344 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 [2021-08-30 18:30:47,345 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting mainErr1ENSURES_VIOLATIONMEMORY_LEAK === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 31 more)] === [2021-08-30 18:30:47,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:30:47,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1760519714, now seen corresponding path program 1 times [2021-08-30 18:30:47,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:30:47,346 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868302169] [2021-08-30 18:30:47,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:30:47,346 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:30:47,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:30:47,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:30:47,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:30:47,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 18:30:47,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:30:47,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-08-30 18:30:47,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:30:47,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-30 18:30:47,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:30:48,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-08-30 18:30:48,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:30:48,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-08-30 18:30:48,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:30:48,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-08-30 18:30:48,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:30:48,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-08-30 18:30:48,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:30:48,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-08-30 18:30:48,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:30:48,597 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-08-30 18:30:48,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:30:48,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868302169] [2021-08-30 18:30:48,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868302169] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 18:30:48,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325984881] [2021-08-30 18:30:48,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:30:48,598 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 18:30:48,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 18:30:48,599 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 18:30:48,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-30 18:30:48,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:30:48,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 94 conjunts are in the unsatisfiable core [2021-08-30 18:30:48,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 18:30:49,098 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 [2021-08-30 18:30:49,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-30 18:30:49,185 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 [2021-08-30 18:30:49,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-30 18:30:49,369 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-08-30 18:30:49,369 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 [2021-08-30 18:30:49,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-30 18:30:49,456 INFO L354 Elim1Store]: treesize reduction 49, result has 15.5 percent of original size [2021-08-30 18:30:49,456 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 [2021-08-30 18:30:49,929 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-08-30 18:30:49,930 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 [2021-08-30 18:30:49,941 INFO L354 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2021-08-30 18:30:49,941 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 [2021-08-30 18:30:59,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-30 18:30:59,420 INFO L354 Elim1Store]: treesize reduction 128, result has 16.9 percent of original size [2021-08-30 18:30:59,420 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 [2021-08-30 18:30:59,553 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-08-30 18:30:59,553 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 [2021-08-30 18:30:59,561 INFO L354 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2021-08-30 18:30:59,561 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 [2021-08-30 18:31:11,468 INFO L354 Elim1Store]: treesize reduction 122, result has 19.7 percent of original size [2021-08-30 18:31:11,468 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 [2021-08-30 18:31:13,758 INFO L354 Elim1Store]: treesize reduction 41, result has 18.0 percent of original size [2021-08-30 18:31:13,758 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 [2021-08-30 18:31:17,785 INFO L354 Elim1Store]: treesize reduction 41, result has 18.0 percent of original size [2021-08-30 18:31:17,786 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 [2021-08-30 18:31:21,913 INFO L354 Elim1Store]: treesize reduction 41, result has 18.0 percent of original size [2021-08-30 18:31:21,913 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 [2021-08-30 18:31:21,917 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-30 18:31:21,918 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 [2021-08-30 18:31:28,683 INFO L354 Elim1Store]: treesize reduction 45, result has 21.1 percent of original size [2021-08-30 18:31:28,684 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 [2021-08-30 18:31:30,800 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 8 proven. 8 refuted. 2 times theorem prover too weak. 19 trivial. 0 not checked. [2021-08-30 18:31:30,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 18:31:30,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325984881] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 18:31:30,950 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-30 18:31:30,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 65 [2021-08-30 18:31:30,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844277854] [2021-08-30 18:31:30,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-08-30 18:31:30,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:31:30,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-08-30 18:31:30,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=4202, Unknown=25, NotChecked=0, Total=4422 [2021-08-30 18:31:30,952 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) [2021-08-30 18:32:19,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:32:19,224 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2021-08-30 18:32:19,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-30 18:32:19,224 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 [2021-08-30 18:32:19,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:32:19,225 INFO L225 Difference]: With dead ends: 98 [2021-08-30 18:32:19,225 INFO L226 Difference]: Without dead ends: 0 [2021-08-30 18:32:19,226 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 88 SyntacticMatches, 10 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2020 ImplicationChecksByTransitivity, 89164.32ms TimeCoverageRelationStatistics Valid=423, Invalid=8842, Unknown=47, NotChecked=0, Total=9312 [2021-08-30 18:32:19,226 INFO L928 BasicCegarLoop]: 9 mSDtfsCounter, 26 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 1086 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 488.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 1579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.05ms SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1086 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 469 IncrementalHoareTripleChecker+Unchecked, 566.30ms IncrementalHoareTripleChecker+Time [2021-08-30 18:32:19,226 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 25 Invalid, 1579 Unknown, 0 Unchecked, 3.05ms Time], IncrementalHoareTripleChecker [24 Valid, 1086 Invalid, 0 Unknown, 469 Unchecked, 566.30ms Time] [2021-08-30 18:32:19,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-30 18:32:19,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-30 18:32:19,227 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) [2021-08-30 18:32:19,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-30 18:32:19,227 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 106 [2021-08-30 18:32:19,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:32:19,228 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-30 18:32:19,228 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) [2021-08-30 18:32:19,228 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-30 18:32:19,228 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-30 18:32:19,230 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr0REQUIRES_VIOLATION (33 of 34 remaining) [2021-08-30 18:32:19,231 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr1REQUIRES_VIOLATION (32 of 34 remaining) [2021-08-30 18:32:19,231 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr2REQUIRES_VIOLATION (31 of 34 remaining) [2021-08-30 18:32:19,231 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr3REQUIRES_VIOLATION (30 of 34 remaining) [2021-08-30 18:32:19,231 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr4REQUIRES_VIOLATION (29 of 34 remaining) [2021-08-30 18:32:19,231 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr5REQUIRES_VIOLATION (28 of 34 remaining) [2021-08-30 18:32:19,232 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr6REQUIRES_VIOLATION (27 of 34 remaining) [2021-08-30 18:32:19,232 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr7REQUIRES_VIOLATION (26 of 34 remaining) [2021-08-30 18:32:19,232 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_update_atErr0REQUIRES_VIOLATION (25 of 34 remaining) [2021-08-30 18:32:19,232 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_update_atErr1REQUIRES_VIOLATION (24 of 34 remaining) [2021-08-30 18:32:19,232 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_update_atErr2REQUIRES_VIOLATION (23 of 34 remaining) [2021-08-30 18:32:19,232 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_update_atErr3REQUIRES_VIOLATION (22 of 34 remaining) [2021-08-30 18:32:19,232 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_get_data_atErr0REQUIRES_VIOLATION (21 of 34 remaining) [2021-08-30 18:32:19,233 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_get_data_atErr1REQUIRES_VIOLATION (20 of 34 remaining) [2021-08-30 18:32:19,233 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_get_data_atErr2REQUIRES_VIOLATION (19 of 34 remaining) [2021-08-30 18:32:19,233 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_get_data_atErr3REQUIRES_VIOLATION (18 of 34 remaining) [2021-08-30 18:32:19,233 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr0REQUIRES_VIOLATION (17 of 34 remaining) [2021-08-30 18:32:19,233 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr1REQUIRES_VIOLATION (16 of 34 remaining) [2021-08-30 18:32:19,233 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr2REQUIRES_VIOLATION (15 of 34 remaining) [2021-08-30 18:32:19,234 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr3REQUIRES_VIOLATION (14 of 34 remaining) [2021-08-30 18:32:19,234 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr4REQUIRES_VIOLATION (13 of 34 remaining) [2021-08-30 18:32:19,234 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr5REQUIRES_VIOLATION (12 of 34 remaining) [2021-08-30 18:32:19,234 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONMEMORY_LEAK (11 of 34 remaining) [2021-08-30 18:32:19,234 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1ENSURES_VIOLATIONMEMORY_LEAK (10 of 34 remaining) [2021-08-30 18:32:19,234 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_destroyErr0REQUIRES_VIOLATION (9 of 34 remaining) [2021-08-30 18:32:19,234 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_destroyErr1REQUIRES_VIOLATION (8 of 34 remaining) [2021-08-30 18:32:19,235 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_destroyErr2REQUIRES_VIOLATION (7 of 34 remaining) [2021-08-30 18:32:19,235 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_destroyErr3REQUIRES_VIOLATION (6 of 34 remaining) [2021-08-30 18:32:19,235 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_destroyErr4ASSERT_VIOLATIONMEMORY_FREE (5 of 34 remaining) [2021-08-30 18:32:19,235 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_destroyErr5ASSERT_VIOLATIONMEMORY_FREE (4 of 34 remaining) [2021-08-30 18:32:19,235 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_destroyErr6ASSERT_VIOLATIONMEMORY_FREE (3 of 34 remaining) [2021-08-30 18:32:19,235 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_destroyErr7ASSERT_VIOLATIONMEMORY_FREE (2 of 34 remaining) [2021-08-30 18:32:19,236 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_destroyErr8ASSERT_VIOLATIONMEMORY_FREE (1 of 34 remaining) [2021-08-30 18:32:19,236 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_destroyErr9ASSERT_VIOLATIONMEMORY_FREE (0 of 34 remaining) [2021-08-30 18:32:19,268 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-08-30 18:32:19,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-08-30 18:32:19,472 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-30 18:32:19,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.08 06:32:19 BoogieIcfgContainer [2021-08-30 18:32:19,474 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-30 18:32:19,474 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-30 18:32:19,474 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-30 18:32:19,475 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-30 18:32:19,475 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:25:00" (3/4) ... [2021-08-30 18:32:19,477 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-30 18:32:19,481 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2021-08-30 18:32:19,481 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-08-30 18:32:19,481 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure myexit [2021-08-30 18:32:19,481 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure dll_circular_destroy [2021-08-30 18:32:19,481 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2021-08-30 18:32:19,481 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2021-08-30 18:32:19,481 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-08-30 18:32:19,481 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure dll_circular_create [2021-08-30 18:32:19,481 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure dll_circular_update_at [2021-08-30 18:32:19,481 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure node_create [2021-08-30 18:32:19,481 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure dll_circular_get_data_at [2021-08-30 18:32:19,488 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 24 nodes and edges [2021-08-30 18:32:19,488 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2021-08-30 18:32:19,488 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-08-30 18:32:19,488 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-30 18:32:19,721 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-30 18:32:19,722 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-30 18:32:19,722 INFO L158 Benchmark]: Toolchain (without parser) took 440121.11ms. Allocated memory was 50.3MB in the beginning and 157.3MB in the end (delta: 107.0MB). Free memory was 25.9MB in the beginning and 83.7MB in the end (delta: -57.8MB). Peak memory consumption was 49.9MB. Max. memory is 16.1GB. [2021-08-30 18:32:19,722 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 50.3MB. Free memory was 32.6MB in the beginning and 32.5MB in the end (delta: 38.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-30 18:32:19,722 INFO L158 Benchmark]: CACSL2BoogieTranslator took 410.36ms. Allocated memory was 50.3MB in the beginning and 60.8MB in the end (delta: 10.5MB). Free memory was 25.7MB in the beginning and 36.8MB in the end (delta: -11.1MB). Peak memory consumption was 5.3MB. Max. memory is 16.1GB. [2021-08-30 18:32:19,723 INFO L158 Benchmark]: Boogie Preprocessor took 57.72ms. Allocated memory is still 60.8MB. Free memory was 36.7MB in the beginning and 33.8MB in the end (delta: 2.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-08-30 18:32:19,723 INFO L158 Benchmark]: RCFGBuilder took 523.07ms. Allocated memory is still 60.8MB. Free memory was 33.8MB in the beginning and 27.1MB in the end (delta: 6.7MB). Peak memory consumption was 10.9MB. Max. memory is 16.1GB. [2021-08-30 18:32:19,723 INFO L158 Benchmark]: TraceAbstraction took 438877.47ms. Allocated memory was 60.8MB in the beginning and 157.3MB in the end (delta: 96.5MB). Free memory was 26.6MB in the beginning and 87.6MB in the end (delta: -61.0MB). Peak memory consumption was 35.5MB. Max. memory is 16.1GB. [2021-08-30 18:32:19,723 INFO L158 Benchmark]: Witness Printer took 247.38ms. Allocated memory is still 157.3MB. Free memory was 87.6MB in the beginning and 83.7MB in the end (delta: 4.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-08-30 18:32:19,724 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 50.3MB. Free memory was 32.6MB in the beginning and 32.5MB in the end (delta: 38.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 410.36ms. Allocated memory was 50.3MB in the beginning and 60.8MB in the end (delta: 10.5MB). Free memory was 25.7MB in the beginning and 36.8MB in the end (delta: -11.1MB). Peak memory consumption was 5.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 57.72ms. Allocated memory is still 60.8MB. Free memory was 36.7MB in the beginning and 33.8MB in the end (delta: 2.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 523.07ms. Allocated memory is still 60.8MB. Free memory was 33.8MB in the beginning and 27.1MB in the end (delta: 6.7MB). Peak memory consumption was 10.9MB. Max. memory is 16.1GB. * TraceAbstraction took 438877.47ms. Allocated memory was 60.8MB in the beginning and 157.3MB in the end (delta: 96.5MB). Free memory was 26.6MB in the beginning and 87.6MB in the end (delta: -61.0MB). Peak memory consumption was 35.5MB. Max. memory is 16.1GB. * Witness Printer took 247.38ms. Allocated memory is still 157.3MB. Free memory was 87.6MB in the beginning and 83.7MB in the end (delta: 4.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms 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: 438824.01ms, OverallIterations: 43, TraceHistogramMax: 3, EmptinessCheckTime: 55.93ms, AutomataDifference: 176899.92ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 0.00ms, InitialAbstractionConstructionTime: 10.13ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 6182 SdHoareTripleChecker+Valid, 22865.18ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6121 mSDsluCounter, 4049 SdHoareTripleChecker+Invalid, 18936.07ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 8891 IncrementalHoareTripleChecker+Unchecked, 14354 mSDsCounter, 1307 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 49864 IncrementalHoareTripleChecker+Invalid, 60062 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1307 mSolverCounterUnsat, 612 mSDtfsCounter, 49864 mSolverCounterSat, 222.61ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4131 GetRequests, 2565 SyntacticMatches, 78 SemanticMatches, 1488 ConstructedPredicates, 15 IntricatePredicates, 0 DeprecatedPredicates, 19145 ImplicationChecksByTransitivity, 379679.90ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=162occurred in iteration=24, InterpolantAutomatonStates: 732, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 210.56ms AutomataMinimizationTime, 43 MinimizatonAttempts, 784 StatesRemovedByMinimization, 38 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 475.08ms SsaConstructionTime, 2192.37ms SatisfiabilityAnalysisTime, 250938.40ms InterpolantComputationTime, 4441 NumberOfCodeBlocks, 4414 NumberOfCodeBlocksAsserted, 73 NumberOfCheckSat, 5006 ConstructedInterpolants, 368 QuantifiedInterpolants, 52379 SizeOfPredicates, 315 NumberOfNonLiveVariables, 9576 ConjunctsInSsa, 1180 ConjunctsInUnsatCore, 79 InterpolantComputations, 22 PerfectInterpolantSequences, 1259/1737 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! [2021-08-30 18:32:19,948 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 [2021-08-30 18:32:20,003 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...