./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2c_update_all_reverse.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2c_update_all_reverse.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4fecbd384f63aa34e01807a3a6735a322a2435f1312f0df3ed763fde7f43fe0a ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 08:42:35,283 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 08:42:35,286 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 08:42:35,346 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 08:42:35,347 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 08:42:35,354 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 08:42:35,357 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 08:42:35,362 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 08:42:35,365 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 08:42:35,375 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 08:42:35,376 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 08:42:35,379 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 08:42:35,379 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 08:42:35,383 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 08:42:35,386 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 08:42:35,393 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 08:42:35,395 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 08:42:35,397 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 08:42:35,400 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 08:42:35,409 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 08:42:35,412 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 08:42:35,414 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 08:42:35,418 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 08:42:35,420 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 08:42:35,426 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 08:42:35,427 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 08:42:35,427 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 08:42:35,430 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 08:42:35,431 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 08:42:35,432 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 08:42:35,434 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 08:42:35,435 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 08:42:35,437 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 08:42:35,439 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 08:42:35,441 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 08:42:35,441 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 08:42:35,442 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 08:42:35,442 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 08:42:35,443 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 08:42:35,444 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 08:42:35,445 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 08:42:35,446 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-28 08:42:35,495 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 08:42:35,496 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 08:42:35,496 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 08:42:35,497 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 08:42:35,498 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 08:42:35,498 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 08:42:35,499 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 08:42:35,499 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 08:42:35,499 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 08:42:35,500 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 08:42:35,501 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 08:42:35,501 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 08:42:35,501 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 08:42:35,502 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-28 08:42:35,502 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-28 08:42:35,502 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-28 08:42:35,502 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 08:42:35,503 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-28 08:42:35,503 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 08:42:35,503 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 08:42:35,503 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 08:42:35,504 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 08:42:35,504 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 08:42:35,504 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 08:42:35,504 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 08:42:35,505 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 08:42:35,505 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 08:42:35,505 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 08:42:35,505 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 08:42:35,507 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4fecbd384f63aa34e01807a3a6735a322a2435f1312f0df3ed763fde7f43fe0a [2021-10-28 08:42:35,806 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 08:42:35,836 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 08:42:35,839 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 08:42:35,841 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 08:42:35,843 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 08:42:35,844 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/list-simple/sll2c_update_all_reverse.i [2021-10-28 08:42:35,938 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/data/cbba6bb2e/f42340102bec4610a84f89aa0c855e72/FLAG7c3b6598d [2021-10-28 08:42:36,612 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 08:42:36,613 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/sv-benchmarks/c/list-simple/sll2c_update_all_reverse.i [2021-10-28 08:42:36,643 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/data/cbba6bb2e/f42340102bec4610a84f89aa0c855e72/FLAG7c3b6598d [2021-10-28 08:42:36,869 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/data/cbba6bb2e/f42340102bec4610a84f89aa0c855e72 [2021-10-28 08:42:36,873 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 08:42:36,875 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-28 08:42:36,890 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 08:42:36,890 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 08:42:36,894 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 08:42:36,895 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:42:36" (1/1) ... [2021-10-28 08:42:36,899 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@514e18f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:42:36, skipping insertion in model container [2021-10-28 08:42:36,899 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:42:36" (1/1) ... [2021-10-28 08:42:36,908 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 08:42:36,973 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 08:42:37,523 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/sv-benchmarks/c/list-simple/sll2c_update_all_reverse.i[24436,24449] [2021-10-28 08:42:37,533 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 08:42:37,549 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 08:42:37,629 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/sv-benchmarks/c/list-simple/sll2c_update_all_reverse.i[24436,24449] [2021-10-28 08:42:37,634 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 08:42:37,673 INFO L208 MainTranslator]: Completed translation [2021-10-28 08:42:37,674 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:42:37 WrapperNode [2021-10-28 08:42:37,674 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 08:42:37,675 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 08:42:37,676 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 08:42:37,676 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 08:42:37,691 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:42:37" (1/1) ... [2021-10-28 08:42:37,691 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:42:37" (1/1) ... [2021-10-28 08:42:37,718 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:42:37" (1/1) ... [2021-10-28 08:42:37,721 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:42:37" (1/1) ... [2021-10-28 08:42:37,760 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:42:37" (1/1) ... [2021-10-28 08:42:37,770 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:42:37" (1/1) ... [2021-10-28 08:42:37,775 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:42:37" (1/1) ... [2021-10-28 08:42:37,790 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 08:42:37,791 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 08:42:37,791 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 08:42:37,791 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 08:42:37,793 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:42:37" (1/1) ... [2021-10-28 08:42:37,802 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 08:42:37,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:42:37,837 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 08:42:37,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 08:42:37,896 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-28 08:42:37,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 08:42:37,897 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-28 08:42:37,897 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-28 08:42:37,897 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-28 08:42:37,898 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-10-28 08:42:37,898 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-10-28 08:42:37,898 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_circular_create [2021-10-28 08:42:37,898 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_circular_destroy [2021-10-28 08:42:37,899 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_circular_get_data_at [2021-10-28 08:42:37,899 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_circular_update_at [2021-10-28 08:42:37,899 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-28 08:42:37,899 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-28 08:42:37,900 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-28 08:42:37,900 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-28 08:42:37,900 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-28 08:42:37,900 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-28 08:42:37,901 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 08:42:37,901 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-28 08:42:37,901 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-28 08:42:37,901 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-28 08:42:37,902 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-28 08:42:37,902 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-28 08:42:37,902 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-28 08:42:37,902 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-28 08:42:37,903 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-28 08:42:37,903 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-28 08:42:37,903 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-28 08:42:37,903 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-28 08:42:37,905 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-28 08:42:37,905 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-28 08:42:37,905 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-28 08:42:37,906 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-28 08:42:37,906 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-28 08:42:37,906 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-28 08:42:37,906 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-28 08:42:37,907 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-28 08:42:37,907 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-28 08:42:37,907 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-28 08:42:37,908 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-28 08:42:37,908 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-28 08:42:37,908 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-28 08:42:37,908 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-28 08:42:37,909 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-28 08:42:37,909 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-28 08:42:37,909 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-28 08:42:37,910 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-28 08:42:37,910 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-28 08:42:37,911 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-28 08:42:37,912 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-28 08:42:37,912 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-28 08:42:37,913 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-28 08:42:37,913 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-28 08:42:37,913 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-28 08:42:37,914 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-28 08:42:37,914 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-28 08:42:37,914 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-28 08:42:37,914 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-28 08:42:37,915 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-28 08:42:37,915 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-28 08:42:37,915 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-28 08:42:37,915 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-28 08:42:37,916 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-28 08:42:37,916 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-28 08:42:37,916 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-28 08:42:37,917 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-28 08:42:37,918 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-28 08:42:37,919 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-28 08:42:37,919 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-28 08:42:37,920 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-28 08:42:37,920 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-28 08:42:37,920 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-28 08:42:37,921 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-28 08:42:37,921 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-28 08:42:37,922 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-10-28 08:42:37,922 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-28 08:42:37,922 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-28 08:42:37,922 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-28 08:42:37,922 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-28 08:42:37,923 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-28 08:42:37,924 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-28 08:42:37,924 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-28 08:42:37,924 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-28 08:42:37,924 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-28 08:42:37,925 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-28 08:42:37,926 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-28 08:42:37,926 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-28 08:42:37,926 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-28 08:42:37,927 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-28 08:42:37,927 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-28 08:42:37,927 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-28 08:42:37,927 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-28 08:42:37,927 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-28 08:42:37,928 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-28 08:42:37,928 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-28 08:42:37,928 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-28 08:42:37,929 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-28 08:42:37,929 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-28 08:42:37,929 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-28 08:42:37,929 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-28 08:42:37,929 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-28 08:42:37,930 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-28 08:42:37,930 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-28 08:42:37,930 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-28 08:42:37,930 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-28 08:42:37,931 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-28 08:42:37,931 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-28 08:42:37,931 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-28 08:42:37,932 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-28 08:42:37,933 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-28 08:42:37,933 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-28 08:42:37,933 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-28 08:42:37,934 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-28 08:42:37,934 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-28 08:42:37,934 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-28 08:42:37,935 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-28 08:42:37,935 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-28 08:42:37,935 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-28 08:42:37,935 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-28 08:42:37,935 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-28 08:42:37,936 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-28 08:42:37,936 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-28 08:42:37,936 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-10-28 08:42:37,937 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-10-28 08:42:37,937 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-28 08:42:37,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-28 08:42:37,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-28 08:42:37,939 INFO L130 BoogieDeclarations]: Found specification of procedure sll_circular_create [2021-10-28 08:42:37,942 INFO L130 BoogieDeclarations]: Found specification of procedure sll_circular_destroy [2021-10-28 08:42:37,943 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-28 08:42:37,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 08:42:37,944 INFO L130 BoogieDeclarations]: Found specification of procedure sll_circular_get_data_at [2021-10-28 08:42:37,945 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-28 08:42:37,946 INFO L130 BoogieDeclarations]: Found specification of procedure sll_circular_update_at [2021-10-28 08:42:37,946 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-28 08:42:37,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-28 08:42:37,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 08:42:37,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 08:42:38,372 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-10-28 08:42:38,655 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 08:42:38,655 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-10-28 08:42:38,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:42:38 BoogieIcfgContainer [2021-10-28 08:42:38,658 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 08:42:38,660 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 08:42:38,660 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 08:42:38,664 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 08:42:38,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 08:42:36" (1/3) ... [2021-10-28 08:42:38,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32171afa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:42:38, skipping insertion in model container [2021-10-28 08:42:38,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:42:37" (2/3) ... [2021-10-28 08:42:38,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32171afa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:42:38, skipping insertion in model container [2021-10-28 08:42:38,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:42:38" (3/3) ... [2021-10-28 08:42:38,668 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2c_update_all_reverse.i [2021-10-28 08:42:38,674 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 08:42:38,674 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2021-10-28 08:42:38,727 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 08:42:38,735 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-28 08:42:38,735 INFO L340 AbstractCegarLoop]: Starting to check reachability of 28 error locations. [2021-10-28 08:42:38,754 INFO L276 IsEmpty]: Start isEmpty. Operand has 104 states, 59 states have (on average 1.728813559322034) internal successors, (102), 87 states have internal predecessors, (102), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-10-28 08:42:38,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-28 08:42:38,763 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:42:38,764 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:42:38,764 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 08:42:38,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:42:38,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1445934727, now seen corresponding path program 1 times [2021-10-28 08:42:38,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:42:38,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680340917] [2021-10-28 08:42:38,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:42:38,801 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:42:38,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:39,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:42:39,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:39,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:42:39,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:42:39,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680340917] [2021-10-28 08:42:39,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680340917] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:42:39,055 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:42:39,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 08:42:39,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705145778] [2021-10-28 08:42:39,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 08:42:39,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:42:39,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 08:42:39,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:42:39,087 INFO L87 Difference]: Start difference. First operand has 104 states, 59 states have (on average 1.728813559322034) internal successors, (102), 87 states have internal predecessors, (102), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:42:39,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:42:39,491 INFO L93 Difference]: Finished difference Result 121 states and 130 transitions. [2021-10-28 08:42:39,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 08:42:39,493 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-10-28 08:42:39,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:42:39,509 INFO L225 Difference]: With dead ends: 121 [2021-10-28 08:42:39,509 INFO L226 Difference]: Without dead ends: 115 [2021-10-28 08:42:39,511 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:42:39,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-10-28 08:42:39,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 96. [2021-10-28 08:42:39,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 56 states have (on average 1.5714285714285714) internal successors, (88), 81 states have internal predecessors, (88), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-10-28 08:42:39,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 103 transitions. [2021-10-28 08:42:39,568 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 103 transitions. Word has length 12 [2021-10-28 08:42:39,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:42:39,568 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 103 transitions. [2021-10-28 08:42:39,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:42:39,569 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 103 transitions. [2021-10-28 08:42:39,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-28 08:42:39,570 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:42:39,570 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:42:39,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 08:42:39,570 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 08:42:39,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:42:39,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1445934728, now seen corresponding path program 1 times [2021-10-28 08:42:39,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:42:39,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191579474] [2021-10-28 08:42:39,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:42:39,572 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:42:39,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:39,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:42:39,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:39,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:42:39,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:42:39,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191579474] [2021-10-28 08:42:39,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191579474] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:42:39,680 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:42:39,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 08:42:39,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247124713] [2021-10-28 08:42:39,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 08:42:39,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:42:39,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 08:42:39,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:42:39,683 INFO L87 Difference]: Start difference. First operand 96 states and 103 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:42:39,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:42:39,981 INFO L93 Difference]: Finished difference Result 113 states and 121 transitions. [2021-10-28 08:42:39,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 08:42:39,982 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-10-28 08:42:39,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:42:39,984 INFO L225 Difference]: With dead ends: 113 [2021-10-28 08:42:39,984 INFO L226 Difference]: Without dead ends: 113 [2021-10-28 08:42:39,985 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:42:39,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-10-28 08:42:39,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 94. [2021-10-28 08:42:39,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 56 states have (on average 1.5357142857142858) internal successors, (86), 79 states have internal predecessors, (86), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-10-28 08:42:39,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 101 transitions. [2021-10-28 08:42:39,997 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 101 transitions. Word has length 12 [2021-10-28 08:42:39,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:42:39,997 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 101 transitions. [2021-10-28 08:42:39,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:42:39,998 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 101 transitions. [2021-10-28 08:42:39,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-28 08:42:39,999 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:42:39,999 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:42:39,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 08:42:39,999 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting sll_circular_createErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 08:42:40,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:42:40,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1652501893, now seen corresponding path program 1 times [2021-10-28 08:42:40,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:42:40,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283003722] [2021-10-28 08:42:40,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:42:40,001 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:42:40,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:40,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:42:40,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:40,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-28 08:42:40,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:40,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:42:40,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:42:40,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283003722] [2021-10-28 08:42:40,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283003722] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:42:40,182 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:42:40,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 08:42:40,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121081323] [2021-10-28 08:42:40,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 08:42:40,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:42:40,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 08:42:40,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 08:42:40,184 INFO L87 Difference]: Start difference. First operand 94 states and 101 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 08:42:40,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:42:40,696 INFO L93 Difference]: Finished difference Result 120 states and 129 transitions. [2021-10-28 08:42:40,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 08:42:40,698 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2021-10-28 08:42:40,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:42:40,705 INFO L225 Difference]: With dead ends: 120 [2021-10-28 08:42:40,705 INFO L226 Difference]: Without dead ends: 120 [2021-10-28 08:42:40,705 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-10-28 08:42:40,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-10-28 08:42:40,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 95. [2021-10-28 08:42:40,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 57 states have (on average 1.5263157894736843) internal successors, (87), 80 states have internal predecessors, (87), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-10-28 08:42:40,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 102 transitions. [2021-10-28 08:42:40,733 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 102 transitions. Word has length 19 [2021-10-28 08:42:40,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:42:40,733 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 102 transitions. [2021-10-28 08:42:40,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 08:42:40,734 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 102 transitions. [2021-10-28 08:42:40,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-28 08:42:40,735 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:42:40,736 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:42:40,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-28 08:42:40,736 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting sll_circular_createErr0REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 08:42:40,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:42:40,737 INFO L85 PathProgramCache]: Analyzing trace with hash 173693975, now seen corresponding path program 1 times [2021-10-28 08:42:40,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:42:40,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273748387] [2021-10-28 08:42:40,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:42:40,738 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:42:40,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:40,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:42:40,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:40,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-28 08:42:40,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:40,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-28 08:42:40,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:41,012 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-28 08:42:41,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:42:41,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273748387] [2021-10-28 08:42:41,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273748387] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:42:41,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:42:41,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 08:42:41,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957542137] [2021-10-28 08:42:41,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 08:42:41,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:42:41,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 08:42:41,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-28 08:42:41,016 INFO L87 Difference]: Start difference. First operand 95 states and 102 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 08:42:41,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:42:41,464 INFO L93 Difference]: Finished difference Result 114 states and 123 transitions. [2021-10-28 08:42:41,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 08:42:41,465 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2021-10-28 08:42:41,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:42:41,467 INFO L225 Difference]: With dead ends: 114 [2021-10-28 08:42:41,467 INFO L226 Difference]: Without dead ends: 114 [2021-10-28 08:42:41,468 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-28 08:42:41,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-10-28 08:42:41,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 94. [2021-10-28 08:42:41,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 57 states have (on average 1.5087719298245614) internal successors, (86), 79 states have internal predecessors, (86), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-10-28 08:42:41,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 101 transitions. [2021-10-28 08:42:41,476 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 101 transitions. Word has length 28 [2021-10-28 08:42:41,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:42:41,477 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 101 transitions. [2021-10-28 08:42:41,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 08:42:41,478 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 101 transitions. [2021-10-28 08:42:41,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-28 08:42:41,479 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:42:41,479 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:42:41,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-28 08:42:41,480 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting sll_circular_createErr1REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 08:42:41,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:42:41,480 INFO L85 PathProgramCache]: Analyzing trace with hash 173693976, now seen corresponding path program 1 times [2021-10-28 08:42:41,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:42:41,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125896346] [2021-10-28 08:42:41,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:42:41,481 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:42:41,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:41,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:42:41,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:41,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-28 08:42:41,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:41,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-28 08:42:41,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:41,661 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 08:42:41,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:42:41,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125896346] [2021-10-28 08:42:41,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125896346] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:42:41,663 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:42:41,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 08:42:41,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904210608] [2021-10-28 08:42:41,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 08:42:41,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:42:41,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 08:42:41,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-28 08:42:41,665 INFO L87 Difference]: Start difference. First operand 94 states and 101 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 08:42:42,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:42:42,118 INFO L93 Difference]: Finished difference Result 113 states and 122 transitions. [2021-10-28 08:42:42,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 08:42:42,119 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2021-10-28 08:42:42,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:42:42,120 INFO L225 Difference]: With dead ends: 113 [2021-10-28 08:42:42,120 INFO L226 Difference]: Without dead ends: 113 [2021-10-28 08:42:42,121 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-28 08:42:42,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-10-28 08:42:42,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 93. [2021-10-28 08:42:42,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 57 states have (on average 1.4912280701754386) internal successors, (85), 78 states have internal predecessors, (85), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-10-28 08:42:42,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 100 transitions. [2021-10-28 08:42:42,128 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 100 transitions. Word has length 28 [2021-10-28 08:42:42,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:42:42,129 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 100 transitions. [2021-10-28 08:42:42,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 08:42:42,130 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 100 transitions. [2021-10-28 08:42:42,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-28 08:42:42,131 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:42:42,131 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:42:42,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-28 08:42:42,132 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting sll_circular_createErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 08:42:42,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:42:42,133 INFO L85 PathProgramCache]: Analyzing trace with hash -918257581, now seen corresponding path program 1 times [2021-10-28 08:42:42,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:42:42,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399571312] [2021-10-28 08:42:42,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:42:42,134 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:42:42,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:42,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:42:42,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:42,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-28 08:42:42,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:42,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-28 08:42:42,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:42,401 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 08:42:42,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:42:42,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399571312] [2021-10-28 08:42:42,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399571312] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:42:42,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266450625] [2021-10-28 08:42:42,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:42:42,403 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:42:42,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:42:42,405 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:42:42,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 08:42:42,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:42,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-28 08:42:42,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:42:42,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 08:42:43,066 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-28 08:42:43,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-10-28 08:42:43,278 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:42:43,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266450625] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:42:43,284 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:42:43,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-10-28 08:42:43,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820990961] [2021-10-28 08:42:43,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 08:42:43,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:42:43,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 08:42:43,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-10-28 08:42:43,287 INFO L87 Difference]: Start difference. First operand 93 states and 100 transitions. Second operand has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 08:42:44,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:42:44,058 INFO L93 Difference]: Finished difference Result 112 states and 121 transitions. [2021-10-28 08:42:44,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 08:42:44,059 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 31 [2021-10-28 08:42:44,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:42:44,061 INFO L225 Difference]: With dead ends: 112 [2021-10-28 08:42:44,061 INFO L226 Difference]: Without dead ends: 112 [2021-10-28 08:42:44,061 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-10-28 08:42:44,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-10-28 08:42:44,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 92. [2021-10-28 08:42:44,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 57 states have (on average 1.4736842105263157) internal successors, (84), 77 states have internal predecessors, (84), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-10-28 08:42:44,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 99 transitions. [2021-10-28 08:42:44,069 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 99 transitions. Word has length 31 [2021-10-28 08:42:44,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:42:44,069 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 99 transitions. [2021-10-28 08:42:44,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 08:42:44,070 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 99 transitions. [2021-10-28 08:42:44,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-28 08:42:44,071 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:42:44,071 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:42:44,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 08:42:44,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:42:44,291 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting sll_circular_createErr3REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 08:42:44,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:42:44,292 INFO L85 PathProgramCache]: Analyzing trace with hash -918257580, now seen corresponding path program 1 times [2021-10-28 08:42:44,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:42:44,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816706390] [2021-10-28 08:42:44,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:42:44,293 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:42:44,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:44,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:42:44,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:44,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-28 08:42:44,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:44,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-28 08:42:44,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:44,634 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 08:42:44,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:42:44,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816706390] [2021-10-28 08:42:44,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816706390] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:42:44,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937042706] [2021-10-28 08:42:44,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:42:44,636 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:42:44,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:42:44,637 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:42:44,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 08:42:44,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:44,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-28 08:42:44,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:42:44,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 08:42:44,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 08:42:45,333 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-28 08:42:45,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2021-10-28 08:42:45,342 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 08:42:45,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-10-28 08:42:45,511 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:42:45,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937042706] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:42:45,511 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:42:45,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-10-28 08:42:45,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441838738] [2021-10-28 08:42:45,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-28 08:42:45,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:42:45,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-28 08:42:45,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-10-28 08:42:45,515 INFO L87 Difference]: Start difference. First operand 92 states and 99 transitions. Second operand has 17 states, 16 states have (on average 2.6875) internal successors, (43), 12 states have internal predecessors, (43), 3 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-28 08:42:46,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:42:46,332 INFO L93 Difference]: Finished difference Result 111 states and 120 transitions. [2021-10-28 08:42:46,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 08:42:46,333 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.6875) internal successors, (43), 12 states have internal predecessors, (43), 3 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 31 [2021-10-28 08:42:46,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:42:46,335 INFO L225 Difference]: With dead ends: 111 [2021-10-28 08:42:46,335 INFO L226 Difference]: Without dead ends: 111 [2021-10-28 08:42:46,335 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-10-28 08:42:46,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-10-28 08:42:46,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 91. [2021-10-28 08:42:46,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 57 states have (on average 1.456140350877193) internal successors, (83), 76 states have internal predecessors, (83), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-10-28 08:42:46,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 98 transitions. [2021-10-28 08:42:46,340 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 98 transitions. Word has length 31 [2021-10-28 08:42:46,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:42:46,340 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 98 transitions. [2021-10-28 08:42:46,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.6875) internal successors, (43), 12 states have internal predecessors, (43), 3 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-28 08:42:46,341 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 98 transitions. [2021-10-28 08:42:46,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-28 08:42:46,342 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:42:46,342 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:42:46,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 08:42:46,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:42:46,543 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting sll_circular_update_atErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 08:42:46,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:42:46,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1835388011, now seen corresponding path program 1 times [2021-10-28 08:42:46,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:42:46,544 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843563119] [2021-10-28 08:42:46,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:42:46,544 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:42:46,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:46,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:42:46,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:46,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:42:46,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:46,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 08:42:46,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:46,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 08:42:46,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:46,792 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-28 08:42:46,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:42:46,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843563119] [2021-10-28 08:42:46,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843563119] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:42:46,793 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:42:46,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-10-28 08:42:46,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805445579] [2021-10-28 08:42:46,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-28 08:42:46,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:42:46,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-28 08:42:46,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-10-28 08:42:46,800 INFO L87 Difference]: Start difference. First operand 91 states and 98 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 08:42:47,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:42:47,620 INFO L93 Difference]: Finished difference Result 119 states and 128 transitions. [2021-10-28 08:42:47,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-28 08:42:47,621 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 40 [2021-10-28 08:42:47,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:42:47,622 INFO L225 Difference]: With dead ends: 119 [2021-10-28 08:42:47,622 INFO L226 Difference]: Without dead ends: 119 [2021-10-28 08:42:47,623 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-10-28 08:42:47,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-10-28 08:42:47,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 94. [2021-10-28 08:42:47,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 60 states have (on average 1.4833333333333334) internal successors, (89), 79 states have internal predecessors, (89), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-10-28 08:42:47,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 104 transitions. [2021-10-28 08:42:47,632 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 104 transitions. Word has length 40 [2021-10-28 08:42:47,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:42:47,636 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 104 transitions. [2021-10-28 08:42:47,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 08:42:47,637 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 104 transitions. [2021-10-28 08:42:47,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-28 08:42:47,640 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:42:47,640 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:42:47,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-28 08:42:47,641 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting sll_circular_update_atErr3REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 08:42:47,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:42:47,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1835388012, now seen corresponding path program 1 times [2021-10-28 08:42:47,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:42:47,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759469565] [2021-10-28 08:42:47,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:42:47,643 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:42:47,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:47,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:42:47,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:47,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:42:47,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:47,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 08:42:47,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:47,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 08:42:47,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:47,840 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-28 08:42:47,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:42:47,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759469565] [2021-10-28 08:42:47,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759469565] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:42:47,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:42:47,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-28 08:42:47,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274072990] [2021-10-28 08:42:47,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 08:42:47,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:42:47,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 08:42:47,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-10-28 08:42:47,844 INFO L87 Difference]: Start difference. First operand 94 states and 104 transitions. Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 08:42:48,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:42:48,390 INFO L93 Difference]: Finished difference Result 136 states and 150 transitions. [2021-10-28 08:42:48,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 08:42:48,391 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2021-10-28 08:42:48,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:42:48,393 INFO L225 Difference]: With dead ends: 136 [2021-10-28 08:42:48,393 INFO L226 Difference]: Without dead ends: 136 [2021-10-28 08:42:48,393 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-10-28 08:42:48,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-10-28 08:42:48,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 106. [2021-10-28 08:42:48,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 70 states have (on average 1.5) internal successors, (105), 90 states have internal predecessors, (105), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-10-28 08:42:48,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 122 transitions. [2021-10-28 08:42:48,399 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 122 transitions. Word has length 40 [2021-10-28 08:42:48,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:42:48,400 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 122 transitions. [2021-10-28 08:42:48,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 08:42:48,400 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 122 transitions. [2021-10-28 08:42:48,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-28 08:42:48,401 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:42:48,402 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:42:48,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-28 08:42:48,402 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting sll_circular_update_atErr1REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 08:42:48,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:42:48,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1835388067, now seen corresponding path program 1 times [2021-10-28 08:42:48,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:42:48,403 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097752666] [2021-10-28 08:42:48,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:42:48,403 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:42:48,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:48,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:42:48,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:48,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:42:48,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:48,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 08:42:48,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:48,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 08:42:48,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:48,764 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 08:42:48,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:42:48,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097752666] [2021-10-28 08:42:48,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097752666] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:42:48,765 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:42:48,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-10-28 08:42:48,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358542718] [2021-10-28 08:42:48,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-28 08:42:48,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:42:48,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-28 08:42:48,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-10-28 08:42:48,766 INFO L87 Difference]: Start difference. First operand 106 states and 122 transitions. Second operand has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 08:42:49,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:42:49,710 INFO L93 Difference]: Finished difference Result 130 states and 145 transitions. [2021-10-28 08:42:49,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 08:42:49,711 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 40 [2021-10-28 08:42:49,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:42:49,712 INFO L225 Difference]: With dead ends: 130 [2021-10-28 08:42:49,712 INFO L226 Difference]: Without dead ends: 130 [2021-10-28 08:42:49,713 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-10-28 08:42:49,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-10-28 08:42:49,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 106. [2021-10-28 08:42:49,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 70 states have (on average 1.457142857142857) internal successors, (102), 90 states have internal predecessors, (102), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-10-28 08:42:49,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 119 transitions. [2021-10-28 08:42:49,720 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 119 transitions. Word has length 40 [2021-10-28 08:42:49,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:42:49,720 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 119 transitions. [2021-10-28 08:42:49,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 08:42:49,721 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 119 transitions. [2021-10-28 08:42:49,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-28 08:42:49,724 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:42:49,724 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:42:49,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-28 08:42:49,724 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting sll_circular_update_atErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 08:42:49,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:42:49,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1182712765, now seen corresponding path program 1 times [2021-10-28 08:42:49,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:42:49,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424686637] [2021-10-28 08:42:49,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:42:49,726 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:42:49,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:49,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:42:49,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:49,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:42:49,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:50,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 08:42:50,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:50,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 08:42:50,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:50,227 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 08:42:50,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:42:50,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424686637] [2021-10-28 08:42:50,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424686637] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:42:50,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142874455] [2021-10-28 08:42:50,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:42:50,229 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:42:50,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:42:50,235 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:42:50,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 08:42:50,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:50,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 62 conjunts are in the unsatisfiable core [2021-10-28 08:42:50,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:42:50,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 08:42:50,711 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 08:42:50,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 08:42:50,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 08:42:50,940 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-28 08:42:50,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2021-10-28 08:42:51,505 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 08:42:51,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 19 [2021-10-28 08:42:51,519 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:42:51,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142874455] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:42:51,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:42:51,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 34 [2021-10-28 08:42:51,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581260518] [2021-10-28 08:42:51,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-28 08:42:51,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:42:51,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-28 08:42:51,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1109, Unknown=0, NotChecked=0, Total=1190 [2021-10-28 08:42:51,538 INFO L87 Difference]: Start difference. First operand 106 states and 119 transitions. Second operand has 35 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 25 states have internal predecessors, (56), 4 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (6), 6 states have call predecessors, (6), 2 states have call successors, (6) [2021-10-28 08:42:53,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:42:53,342 INFO L93 Difference]: Finished difference Result 155 states and 175 transitions. [2021-10-28 08:42:53,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-28 08:42:53,343 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 25 states have internal predecessors, (56), 4 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (6), 6 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2021-10-28 08:42:53,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:42:53,344 INFO L225 Difference]: With dead ends: 155 [2021-10-28 08:42:53,345 INFO L226 Difference]: Without dead ends: 155 [2021-10-28 08:42:53,346 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=198, Invalid=2154, Unknown=0, NotChecked=0, Total=2352 [2021-10-28 08:42:53,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-10-28 08:42:53,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 125. [2021-10-28 08:42:53,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 86 states have (on average 1.4186046511627908) internal successors, (122), 106 states have internal predecessors, (122), 11 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2021-10-28 08:42:53,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 144 transitions. [2021-10-28 08:42:53,354 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 144 transitions. Word has length 43 [2021-10-28 08:42:53,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:42:53,355 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 144 transitions. [2021-10-28 08:42:53,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 25 states have internal predecessors, (56), 4 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (6), 6 states have call predecessors, (6), 2 states have call successors, (6) [2021-10-28 08:42:53,355 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 144 transitions. [2021-10-28 08:42:53,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-28 08:42:53,356 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:42:53,357 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:42:53,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 08:42:53,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-28 08:42:53,571 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting sll_circular_update_atErr3REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 08:42:53,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:42:53,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1182712764, now seen corresponding path program 1 times [2021-10-28 08:42:53,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:42:53,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078813579] [2021-10-28 08:42:53,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:42:53,572 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:42:53,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:53,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:42:53,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:53,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:42:53,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:54,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 08:42:54,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:54,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 08:42:54,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:54,326 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 08:42:54,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:42:54,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078813579] [2021-10-28 08:42:54,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078813579] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:42:54,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102336071] [2021-10-28 08:42:54,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:42:54,327 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:42:54,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:42:54,328 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:42:54,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 08:42:54,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:54,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 73 conjunts are in the unsatisfiable core [2021-10-28 08:42:54,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:42:54,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 08:42:54,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 08:42:55,207 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 08:42:55,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 08:42:55,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-10-28 08:42:55,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-10-28 08:42:55,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 08:42:55,710 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-28 08:42:55,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 55 [2021-10-28 08:42:55,725 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-28 08:42:55,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 56 [2021-10-28 08:42:56,878 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-10-28 08:42:56,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 68 [2021-10-28 08:42:56,897 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-10-28 08:42:56,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 39 [2021-10-28 08:42:57,142 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:42:57,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102336071] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:42:57,142 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:42:57,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 41 [2021-10-28 08:42:57,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368312524] [2021-10-28 08:42:57,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-10-28 08:42:57,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:42:57,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-10-28 08:42:57,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1631, Unknown=0, NotChecked=0, Total=1722 [2021-10-28 08:42:57,146 INFO L87 Difference]: Start difference. First operand 125 states and 144 transitions. Second operand has 42 states, 41 states have (on average 1.5609756097560976) internal successors, (64), 31 states have internal predecessors, (64), 5 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) [2021-10-28 08:43:02,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:43:02,005 INFO L93 Difference]: Finished difference Result 191 states and 223 transitions. [2021-10-28 08:43:02,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-28 08:43:02,009 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 1.5609756097560976) internal successors, (64), 31 states have internal predecessors, (64), 5 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) Word has length 43 [2021-10-28 08:43:02,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:43:02,011 INFO L225 Difference]: With dead ends: 191 [2021-10-28 08:43:02,012 INFO L226 Difference]: Without dead ends: 191 [2021-10-28 08:43:02,013 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=242, Invalid=3418, Unknown=0, NotChecked=0, Total=3660 [2021-10-28 08:43:02,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-10-28 08:43:02,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 141. [2021-10-28 08:43:02,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 98 states have (on average 1.3979591836734695) internal successors, (137), 120 states have internal predecessors, (137), 12 states have call successors, (12), 10 states have call predecessors, (12), 11 states have return successors, (15), 10 states have call predecessors, (15), 11 states have call successors, (15) [2021-10-28 08:43:02,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 164 transitions. [2021-10-28 08:43:02,028 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 164 transitions. Word has length 43 [2021-10-28 08:43:02,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:43:02,028 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 164 transitions. [2021-10-28 08:43:02,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 1.5609756097560976) internal successors, (64), 31 states have internal predecessors, (64), 5 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) [2021-10-28 08:43:02,029 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 164 transitions. [2021-10-28 08:43:02,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-28 08:43:02,030 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:43:02,031 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:43:02,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 08:43:02,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-28 08:43:02,251 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting sll_circular_update_atErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 08:43:02,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:43:02,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1717411179, now seen corresponding path program 2 times [2021-10-28 08:43:02,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:43:02,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856773534] [2021-10-28 08:43:02,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:02,252 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:43:02,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:02,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:43:02,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:02,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:43:02,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:02,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 08:43:02,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:02,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 08:43:02,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:02,422 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-28 08:43:02,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:43:02,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856773534] [2021-10-28 08:43:02,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856773534] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:43:02,422 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:43:02,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-28 08:43:02,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801115113] [2021-10-28 08:43:02,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 08:43:02,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:43:02,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 08:43:02,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-10-28 08:43:02,424 INFO L87 Difference]: Start difference. First operand 141 states and 164 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 08:43:02,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:43:02,965 INFO L93 Difference]: Finished difference Result 155 states and 170 transitions. [2021-10-28 08:43:02,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 08:43:02,966 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2021-10-28 08:43:02,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:43:02,967 INFO L225 Difference]: With dead ends: 155 [2021-10-28 08:43:02,967 INFO L226 Difference]: Without dead ends: 155 [2021-10-28 08:43:02,968 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-10-28 08:43:02,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-10-28 08:43:02,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 136. [2021-10-28 08:43:02,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 95 states have (on average 1.3157894736842106) internal successors, (125), 115 states have internal predecessors, (125), 12 states have call successors, (12), 10 states have call predecessors, (12), 11 states have return successors, (13), 10 states have call predecessors, (13), 11 states have call successors, (13) [2021-10-28 08:43:02,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 150 transitions. [2021-10-28 08:43:02,978 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 150 transitions. Word has length 46 [2021-10-28 08:43:02,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:43:02,979 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 150 transitions. [2021-10-28 08:43:02,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 08:43:02,979 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 150 transitions. [2021-10-28 08:43:02,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-10-28 08:43:02,985 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:43:02,986 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:43:02,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-28 08:43:02,986 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting sll_circular_get_data_atErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 08:43:02,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:43:02,987 INFO L85 PathProgramCache]: Analyzing trace with hash -227427244, now seen corresponding path program 1 times [2021-10-28 08:43:02,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:43:02,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474612467] [2021-10-28 08:43:02,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:02,988 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:43:03,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:03,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:43:03,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:03,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:43:03,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:03,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 08:43:03,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:03,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 08:43:03,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:03,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 08:43:03,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:03,236 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-28 08:43:03,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:43:03,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474612467] [2021-10-28 08:43:03,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474612467] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:43:03,237 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:43:03,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-10-28 08:43:03,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596587836] [2021-10-28 08:43:03,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-28 08:43:03,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:43:03,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 08:43:03,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-10-28 08:43:03,240 INFO L87 Difference]: Start difference. First operand 136 states and 150 transitions. Second operand has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-28 08:43:03,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:43:03,915 INFO L93 Difference]: Finished difference Result 163 states and 178 transitions. [2021-10-28 08:43:03,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 08:43:03,916 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 53 [2021-10-28 08:43:03,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:43:03,918 INFO L225 Difference]: With dead ends: 163 [2021-10-28 08:43:03,918 INFO L226 Difference]: Without dead ends: 163 [2021-10-28 08:43:03,918 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-10-28 08:43:03,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-10-28 08:43:03,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 139. [2021-10-28 08:43:03,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 98 states have (on average 1.336734693877551) internal successors, (131), 118 states have internal predecessors, (131), 12 states have call successors, (12), 10 states have call predecessors, (12), 11 states have return successors, (13), 10 states have call predecessors, (13), 11 states have call successors, (13) [2021-10-28 08:43:03,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 156 transitions. [2021-10-28 08:43:03,929 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 156 transitions. Word has length 53 [2021-10-28 08:43:03,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:43:03,929 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 156 transitions. [2021-10-28 08:43:03,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-28 08:43:03,930 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 156 transitions. [2021-10-28 08:43:03,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-10-28 08:43:03,931 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:43:03,931 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:43:03,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-28 08:43:03,932 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting sll_circular_get_data_atErr3REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 08:43:03,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:43:03,932 INFO L85 PathProgramCache]: Analyzing trace with hash -227427243, now seen corresponding path program 1 times [2021-10-28 08:43:03,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:43:03,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746368775] [2021-10-28 08:43:03,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:03,933 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:43:03,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:04,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:43:04,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:04,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:43:04,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:04,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 08:43:04,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:04,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 08:43:04,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:04,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 08:43:04,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:04,077 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-28 08:43:04,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:43:04,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746368775] [2021-10-28 08:43:04,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746368775] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:43:04,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699041186] [2021-10-28 08:43:04,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:04,079 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:43:04,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:43:04,084 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:43:04,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 08:43:04,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:04,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 08:43:04,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:43:04,557 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-28 08:43:04,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699041186] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:43:04,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:43:04,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2021-10-28 08:43:04,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609980237] [2021-10-28 08:43:04,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 08:43:04,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:43:04,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 08:43:04,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-10-28 08:43:04,561 INFO L87 Difference]: Start difference. First operand 139 states and 156 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 8 states have internal predecessors, (44), 6 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-10-28 08:43:04,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:43:04,936 INFO L93 Difference]: Finished difference Result 169 states and 188 transitions. [2021-10-28 08:43:04,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 08:43:04,936 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 8 states have internal predecessors, (44), 6 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 53 [2021-10-28 08:43:04,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:43:04,938 INFO L225 Difference]: With dead ends: 169 [2021-10-28 08:43:04,938 INFO L226 Difference]: Without dead ends: 169 [2021-10-28 08:43:04,939 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-10-28 08:43:04,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-10-28 08:43:04,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 148. [2021-10-28 08:43:04,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 106 states have (on average 1.320754716981132) internal successors, (140), 124 states have internal predecessors, (140), 13 states have call successors, (13), 10 states have call predecessors, (13), 11 states have return successors, (14), 13 states have call predecessors, (14), 12 states have call successors, (14) [2021-10-28 08:43:04,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 167 transitions. [2021-10-28 08:43:04,947 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 167 transitions. Word has length 53 [2021-10-28 08:43:04,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:43:04,947 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 167 transitions. [2021-10-28 08:43:04,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 8 states have internal predecessors, (44), 6 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-10-28 08:43:04,948 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 167 transitions. [2021-10-28 08:43:04,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-10-28 08:43:04,949 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:43:04,949 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:43:04,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-28 08:43:05,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-28 08:43:05,156 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting sll_circular_update_atErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 08:43:05,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:43:05,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1008365047, now seen corresponding path program 1 times [2021-10-28 08:43:05,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:43:05,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553331054] [2021-10-28 08:43:05,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:05,157 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:43:05,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:05,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:43:05,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:05,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:43:05,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:05,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 08:43:05,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:05,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 08:43:05,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:05,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 08:43:05,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:05,364 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-28 08:43:05,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:43:05,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553331054] [2021-10-28 08:43:05,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553331054] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:43:05,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433060467] [2021-10-28 08:43:05,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:05,366 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:43:05,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:43:05,367 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:43:05,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-28 08:43:05,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:05,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 08:43:05,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:43:05,851 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-28 08:43:05,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433060467] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:43:05,852 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 08:43:05,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 13 [2021-10-28 08:43:05,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497056782] [2021-10-28 08:43:05,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 08:43:05,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:43:05,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 08:43:05,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-10-28 08:43:05,853 INFO L87 Difference]: Start difference. First operand 148 states and 167 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-28 08:43:05,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:43:05,930 INFO L93 Difference]: Finished difference Result 138 states and 150 transitions. [2021-10-28 08:43:05,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 08:43:05,931 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 54 [2021-10-28 08:43:05,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:43:05,933 INFO L225 Difference]: With dead ends: 138 [2021-10-28 08:43:05,933 INFO L226 Difference]: Without dead ends: 138 [2021-10-28 08:43:05,934 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-10-28 08:43:05,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-10-28 08:43:05,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 128. [2021-10-28 08:43:05,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 89 states have (on average 1.3146067415730338) internal successors, (117), 107 states have internal predecessors, (117), 12 states have call successors, (12), 9 states have call predecessors, (12), 9 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2021-10-28 08:43:05,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 141 transitions. [2021-10-28 08:43:05,944 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 141 transitions. Word has length 54 [2021-10-28 08:43:05,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:43:05,944 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 141 transitions. [2021-10-28 08:43:05,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-28 08:43:05,945 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 141 transitions. [2021-10-28 08:43:05,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-10-28 08:43:05,946 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:43:05,946 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:43:05,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-28 08:43:06,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-28 08:43:06,163 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting sll_circular_update_atErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 08:43:06,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:43:06,164 INFO L85 PathProgramCache]: Analyzing trace with hash 953058577, now seen corresponding path program 3 times [2021-10-28 08:43:06,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:43:06,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138535804] [2021-10-28 08:43:06,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:06,165 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:43:06,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:06,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:43:06,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:06,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:43:06,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:06,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 08:43:06,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:06,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 08:43:06,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:06,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-10-28 08:43:06,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:06,315 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-28 08:43:06,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:43:06,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138535804] [2021-10-28 08:43:06,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138535804] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:43:06,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540052376] [2021-10-28 08:43:06,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 08:43:06,316 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:43:06,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:43:06,318 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:43:06,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-28 08:43:06,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-28 08:43:06,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:43:06,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 08:43:06,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:43:06,998 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-28 08:43:06,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540052376] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:43:06,998 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:43:06,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 10 [2021-10-28 08:43:06,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098688353] [2021-10-28 08:43:07,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 08:43:07,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:43:07,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 08:43:07,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-10-28 08:43:07,004 INFO L87 Difference]: Start difference. First operand 128 states and 141 transitions. Second operand has 10 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 7 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2021-10-28 08:43:07,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:43:07,422 INFO L93 Difference]: Finished difference Result 134 states and 147 transitions. [2021-10-28 08:43:07,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 08:43:07,423 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 7 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) Word has length 55 [2021-10-28 08:43:07,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:43:07,424 INFO L225 Difference]: With dead ends: 134 [2021-10-28 08:43:07,424 INFO L226 Difference]: Without dead ends: 125 [2021-10-28 08:43:07,424 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-10-28 08:43:07,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-10-28 08:43:07,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 106. [2021-10-28 08:43:07,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 73 states have (on average 1.3287671232876712) internal successors, (97), 88 states have internal predecessors, (97), 10 states have call successors, (10), 8 states have call predecessors, (10), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-28 08:43:07,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 116 transitions. [2021-10-28 08:43:07,431 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 116 transitions. Word has length 55 [2021-10-28 08:43:07,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:43:07,432 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 116 transitions. [2021-10-28 08:43:07,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 7 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2021-10-28 08:43:07,432 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 116 transitions. [2021-10-28 08:43:07,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-10-28 08:43:07,433 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:43:07,433 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:43:07,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-28 08:43:07,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-28 08:43:07,639 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting sll_circular_get_data_atErr3REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 08:43:07,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:43:07,640 INFO L85 PathProgramCache]: Analyzing trace with hash 886011465, now seen corresponding path program 2 times [2021-10-28 08:43:07,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:43:07,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026975703] [2021-10-28 08:43:07,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:07,640 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:43:07,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:07,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:43:07,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:07,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:43:07,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:07,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 08:43:07,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:07,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 08:43:07,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:07,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 08:43:07,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:07,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-10-28 08:43:07,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:07,823 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-10-28 08:43:07,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:43:07,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026975703] [2021-10-28 08:43:07,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026975703] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:43:07,824 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:43:07,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-28 08:43:07,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752108323] [2021-10-28 08:43:07,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 08:43:07,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:43:07,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 08:43:07,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-10-28 08:43:07,827 INFO L87 Difference]: Start difference. First operand 106 states and 116 transitions. Second operand has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-28 08:43:08,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:43:08,229 INFO L93 Difference]: Finished difference Result 141 states and 152 transitions. [2021-10-28 08:43:08,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 08:43:08,230 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 61 [2021-10-28 08:43:08,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:43:08,231 INFO L225 Difference]: With dead ends: 141 [2021-10-28 08:43:08,231 INFO L226 Difference]: Without dead ends: 141 [2021-10-28 08:43:08,231 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-10-28 08:43:08,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-10-28 08:43:08,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 116. [2021-10-28 08:43:08,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 82 states have (on average 1.3658536585365855) internal successors, (112), 97 states have internal predecessors, (112), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-28 08:43:08,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 131 transitions. [2021-10-28 08:43:08,237 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 131 transitions. Word has length 61 [2021-10-28 08:43:08,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:43:08,238 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 131 transitions. [2021-10-28 08:43:08,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-28 08:43:08,238 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 131 transitions. [2021-10-28 08:43:08,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-10-28 08:43:08,239 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:43:08,239 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:43:08,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-28 08:43:08,240 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting sll_circular_get_data_atErr1REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 08:43:08,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:43:08,240 INFO L85 PathProgramCache]: Analyzing trace with hash 886011520, now seen corresponding path program 1 times [2021-10-28 08:43:08,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:43:08,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536292317] [2021-10-28 08:43:08,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:08,241 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:43:08,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:08,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:43:08,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:08,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:43:08,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:08,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 08:43:08,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:08,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 08:43:08,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:08,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 08:43:08,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:08,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-10-28 08:43:08,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:08,553 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-28 08:43:08,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:43:08,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536292317] [2021-10-28 08:43:08,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536292317] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:43:08,554 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:43:08,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-10-28 08:43:08,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6595448] [2021-10-28 08:43:08,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-28 08:43:08,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:43:08,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 08:43:08,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-10-28 08:43:08,556 INFO L87 Difference]: Start difference. First operand 116 states and 131 transitions. Second operand has 15 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 9 states have internal predecessors, (41), 2 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-28 08:43:09,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:43:09,404 INFO L93 Difference]: Finished difference Result 140 states and 153 transitions. [2021-10-28 08:43:09,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 08:43:09,405 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 9 states have internal predecessors, (41), 2 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 61 [2021-10-28 08:43:09,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:43:09,408 INFO L225 Difference]: With dead ends: 140 [2021-10-28 08:43:09,408 INFO L226 Difference]: Without dead ends: 140 [2021-10-28 08:43:09,408 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-10-28 08:43:09,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-10-28 08:43:09,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 116. [2021-10-28 08:43:09,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 82 states have (on average 1.329268292682927) internal successors, (109), 97 states have internal predecessors, (109), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-28 08:43:09,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 128 transitions. [2021-10-28 08:43:09,417 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 128 transitions. Word has length 61 [2021-10-28 08:43:09,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:43:09,418 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 128 transitions. [2021-10-28 08:43:09,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 9 states have internal predecessors, (41), 2 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-28 08:43:09,419 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 128 transitions. [2021-10-28 08:43:09,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-10-28 08:43:09,420 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:43:09,420 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:43:09,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-10-28 08:43:09,420 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting sll_circular_get_data_atErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 08:43:09,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:43:09,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1699691905, now seen corresponding path program 1 times [2021-10-28 08:43:09,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:43:09,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817932691] [2021-10-28 08:43:09,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:09,421 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:43:09,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:09,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:43:09,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:09,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:43:09,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:09,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 08:43:09,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:09,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 08:43:09,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:09,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 08:43:09,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:10,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-10-28 08:43:10,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:10,165 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-28 08:43:10,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:43:10,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817932691] [2021-10-28 08:43:10,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817932691] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:43:10,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842917854] [2021-10-28 08:43:10,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:10,166 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:43:10,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:43:10,179 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:43:10,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-28 08:43:10,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:10,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 84 conjunts are in the unsatisfiable core [2021-10-28 08:43:10,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:43:10,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 08:43:10,715 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 08:43:10,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 08:43:10,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 08:43:10,851 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-28 08:43:10,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 62 [2021-10-28 08:43:11,199 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 08:43:11,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 16 [2021-10-28 08:43:32,575 INFO L354 Elim1Store]: treesize reduction 127, result has 15.9 percent of original size [2021-10-28 08:43:32,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 57 [2021-10-28 08:43:32,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-10-28 08:43:48,980 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-10-28 08:43:48,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 20 [2021-10-28 08:43:51,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-28 08:43:51,448 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 15 refuted. 2 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-28 08:43:51,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842917854] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:43:51,448 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:43:51,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 43 [2021-10-28 08:43:51,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378945314] [2021-10-28 08:43:51,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-10-28 08:43:51,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:43:51,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-10-28 08:43:51,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1725, Unknown=40, NotChecked=0, Total=1892 [2021-10-28 08:43:51,451 INFO L87 Difference]: Start difference. First operand 116 states and 128 transitions. Second operand has 44 states, 43 states have (on average 1.813953488372093) internal successors, (78), 33 states have internal predecessors, (78), 6 states have call successors, (15), 8 states have call predecessors, (15), 9 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2021-10-28 08:44:49,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:44:49,760 INFO L93 Difference]: Finished difference Result 152 states and 168 transitions. [2021-10-28 08:44:49,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-28 08:44:49,761 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.813953488372093) internal successors, (78), 33 states have internal predecessors, (78), 6 states have call successors, (15), 8 states have call predecessors, (15), 9 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) Word has length 64 [2021-10-28 08:44:49,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:44:49,762 INFO L225 Difference]: With dead ends: 152 [2021-10-28 08:44:49,762 INFO L226 Difference]: Without dead ends: 152 [2021-10-28 08:44:49,763 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 50 SyntacticMatches, 8 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 50.8s TimeCoverageRelationStatistics Valid=385, Invalid=3729, Unknown=46, NotChecked=0, Total=4160 [2021-10-28 08:44:49,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-10-28 08:44:49,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 124. [2021-10-28 08:44:49,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 90 states have (on average 1.3666666666666667) internal successors, (123), 105 states have internal predecessors, (123), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-28 08:44:49,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 142 transitions. [2021-10-28 08:44:49,775 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 142 transitions. Word has length 64 [2021-10-28 08:44:49,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:44:49,776 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 142 transitions. [2021-10-28 08:44:49,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.813953488372093) internal successors, (78), 33 states have internal predecessors, (78), 6 states have call successors, (15), 8 states have call predecessors, (15), 9 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2021-10-28 08:44:49,776 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 142 transitions. [2021-10-28 08:44:49,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-10-28 08:44:49,777 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:44:49,777 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:44:49,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-28 08:44:49,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:44:49,999 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting sll_circular_get_data_atErr3REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 08:44:49,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:44:50,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1699691904, now seen corresponding path program 1 times [2021-10-28 08:44:50,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:44:50,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543370884] [2021-10-28 08:44:50,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:44:50,000 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:44:50,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:44:50,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:44:50,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:44:50,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:44:50,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:44:50,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 08:44:50,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:44:50,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 08:44:50,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:44:50,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 08:44:50,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:44:50,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-10-28 08:44:50,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:44:51,136 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 08:44:51,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:44:51,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543370884] [2021-10-28 08:44:51,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543370884] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:44:51,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873457648] [2021-10-28 08:44:51,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:44:51,136 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:44:51,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:44:51,137 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:44:51,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-28 08:44:51,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:44:51,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 104 conjunts are in the unsatisfiable core [2021-10-28 08:44:51,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:44:51,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 08:44:51,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 08:44:52,000 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 08:44:52,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 08:44:52,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-10-28 08:44:52,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 08:44:52,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-10-28 08:44:52,403 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-28 08:44:52,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 55 [2021-10-28 08:44:52,417 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-28 08:44:52,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 56 [2021-10-28 08:44:53,008 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 08:44:53,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 45 [2021-10-28 08:44:53,018 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 08:44:53,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-10-28 08:45:01,732 INFO L354 Elim1Store]: treesize reduction 74, result has 22.1 percent of original size [2021-10-28 08:45:01,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 119 treesize of output 97 [2021-10-28 08:45:01,758 INFO L354 Elim1Store]: treesize reduction 90, result has 21.7 percent of original size [2021-10-28 08:45:01,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 71 [2021-10-28 08:45:01,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-10-28 08:45:01,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-10-28 08:45:07,447 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-10-28 08:45:07,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 53 [2021-10-28 08:45:07,459 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-10-28 08:45:07,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 34 [2021-10-28 08:45:07,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 39 [2021-10-28 08:45:07,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24 [2021-10-28 08:45:07,911 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-28 08:45:07,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873457648] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:45:07,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:45:07,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 28] total 58 [2021-10-28 08:45:07,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137926591] [2021-10-28 08:45:07,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-10-28 08:45:07,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:45:07,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-10-28 08:45:07,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=3230, Unknown=7, NotChecked=0, Total=3422 [2021-10-28 08:45:07,914 INFO L87 Difference]: Start difference. First operand 124 states and 142 transitions. Second operand has 59 states, 58 states have (on average 1.6724137931034482) internal successors, (97), 46 states have internal predecessors, (97), 8 states have call successors, (15), 8 states have call predecessors, (15), 11 states have return successors, (11), 10 states have call predecessors, (11), 7 states have call successors, (11) [2021-10-28 08:45:14,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:45:14,328 INFO L93 Difference]: Finished difference Result 154 states and 169 transitions. [2021-10-28 08:45:14,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-28 08:45:14,329 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 1.6724137931034482) internal successors, (97), 46 states have internal predecessors, (97), 8 states have call successors, (15), 8 states have call predecessors, (15), 11 states have return successors, (11), 10 states have call predecessors, (11), 7 states have call successors, (11) Word has length 64 [2021-10-28 08:45:14,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:45:14,330 INFO L225 Difference]: With dead ends: 154 [2021-10-28 08:45:14,330 INFO L226 Difference]: Without dead ends: 154 [2021-10-28 08:45:14,333 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=460, Invalid=6175, Unknown=7, NotChecked=0, Total=6642 [2021-10-28 08:45:14,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-10-28 08:45:14,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 123. [2021-10-28 08:45:14,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 89 states have (on average 1.3258426966292134) internal successors, (118), 104 states have internal predecessors, (118), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-28 08:45:14,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 137 transitions. [2021-10-28 08:45:14,338 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 137 transitions. Word has length 64 [2021-10-28 08:45:14,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:45:14,338 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 137 transitions. [2021-10-28 08:45:14,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 1.6724137931034482) internal successors, (97), 46 states have internal predecessors, (97), 8 states have call successors, (15), 8 states have call predecessors, (15), 11 states have return successors, (11), 10 states have call predecessors, (11), 7 states have call successors, (11) [2021-10-28 08:45:14,339 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 137 transitions. [2021-10-28 08:45:14,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-10-28 08:45:14,340 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:45:14,340 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:45:14,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-28 08:45:14,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:45:14,555 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting sll_circular_get_data_atErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 08:45:14,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:45:14,556 INFO L85 PathProgramCache]: Analyzing trace with hash 2144663272, now seen corresponding path program 2 times [2021-10-28 08:45:14,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:45:14,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757001925] [2021-10-28 08:45:14,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:45:14,556 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:45:14,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:14,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:45:14,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:14,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:45:14,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:14,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 08:45:14,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:14,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 08:45:14,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:14,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 08:45:14,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:14,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-10-28 08:45:14,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:14,689 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-10-28 08:45:14,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:45:14,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757001925] [2021-10-28 08:45:14,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757001925] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:45:14,690 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:45:14,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-28 08:45:14,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109583260] [2021-10-28 08:45:14,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 08:45:14,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:45:14,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 08:45:14,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-10-28 08:45:14,694 INFO L87 Difference]: Start difference. First operand 123 states and 137 transitions. Second operand has 11 states, 10 states have (on average 4.1) internal successors, (41), 7 states have internal predecessors, (41), 3 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-28 08:45:15,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:45:15,095 INFO L93 Difference]: Finished difference Result 128 states and 135 transitions. [2021-10-28 08:45:15,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 08:45:15,098 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.1) internal successors, (41), 7 states have internal predecessors, (41), 3 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 67 [2021-10-28 08:45:15,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:45:15,099 INFO L225 Difference]: With dead ends: 128 [2021-10-28 08:45:15,099 INFO L226 Difference]: Without dead ends: 128 [2021-10-28 08:45:15,099 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-10-28 08:45:15,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-10-28 08:45:15,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 109. [2021-10-28 08:45:15,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 79 states have (on average 1.2151898734177216) internal successors, (96), 90 states have internal predecessors, (96), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-28 08:45:15,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 115 transitions. [2021-10-28 08:45:15,103 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 115 transitions. Word has length 67 [2021-10-28 08:45:15,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:45:15,103 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 115 transitions. [2021-10-28 08:45:15,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.1) internal successors, (41), 7 states have internal predecessors, (41), 3 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-28 08:45:15,104 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 115 transitions. [2021-10-28 08:45:15,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-10-28 08:45:15,104 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:45:15,104 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:45:15,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-10-28 08:45:15,105 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 08:45:15,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:45:15,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1624212225, now seen corresponding path program 1 times [2021-10-28 08:45:15,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:45:15,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14641433] [2021-10-28 08:45:15,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:45:15,106 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:45:15,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:15,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:45:15,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:15,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:45:15,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:15,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 08:45:15,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:15,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 08:45:15,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:15,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 08:45:15,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:16,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-10-28 08:45:16,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:16,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-10-28 08:45:16,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:16,597 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 08:45:16,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:45:16,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14641433] [2021-10-28 08:45:16,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14641433] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:45:16,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781620483] [2021-10-28 08:45:16,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:45:16,597 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:45:16,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:45:16,598 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:45:16,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-28 08:45:17,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:17,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 116 conjunts are in the unsatisfiable core [2021-10-28 08:45:17,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:45:17,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 08:45:17,421 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 08:45:17,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 08:45:17,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 08:45:17,678 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-28 08:45:17,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 22 [2021-10-28 08:45:18,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 96 [2021-10-28 08:45:18,409 INFO L354 Elim1Store]: treesize reduction 31, result has 38.0 percent of original size [2021-10-28 08:45:18,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 90 [2021-10-28 08:45:18,588 INFO L354 Elim1Store]: treesize reduction 86, result has 22.5 percent of original size [2021-10-28 08:45:18,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 75 [2021-10-28 08:45:20,459 WARN L860 $PredicateComparison]: unable to prove that (exists ((sll_circular_update_at_~head.offset Int) (sll_circular_update_at_~data Int)) (let ((.cse0 (+ sll_circular_update_at_~head.offset 4))) (and (= |c_#memory_int| (store |c_old(#memory_int)| |c_sll_circular_update_at_#in~head.base| (store (select |c_old(#memory_int)| |c_sll_circular_update_at_#in~head.base|) .cse0 sll_circular_update_at_~data))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_sll_circular_update_at_#in~head.base| (store (select |c_old(#memory_$Pointer$.offset)| |c_sll_circular_update_at_#in~head.base|) .cse0 (select (select |c_#memory_$Pointer$.offset| |c_sll_circular_update_at_#in~head.base|) .cse0)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_sll_circular_update_at_#in~head.base| (store (select |c_old(#memory_$Pointer$.base)| |c_sll_circular_update_at_#in~head.base|) .cse0 (select (select |c_#memory_$Pointer$.base| |c_sll_circular_update_at_#in~head.base|) .cse0)))) (<= |c_sll_circular_update_at_#in~head.offset| sll_circular_update_at_~head.offset)))) is different from true [2021-10-28 08:45:20,539 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-10-28 08:45:20,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 64 [2021-10-28 08:45:20,562 INFO L354 Elim1Store]: treesize reduction 59, result has 22.4 percent of original size [2021-10-28 08:45:20,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 64 [2021-10-28 08:45:20,577 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-10-28 08:45:20,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 36 [2021-10-28 08:45:22,182 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-28 08:45:22,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 80 [2021-10-28 08:45:22,198 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-28 08:45:22,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 76 [2021-10-28 08:45:22,216 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 08:45:22,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 62 [2021-10-28 08:45:22,363 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 2 not checked. [2021-10-28 08:45:22,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781620483] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:45:22,363 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:45:22,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 68 [2021-10-28 08:45:22,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886319790] [2021-10-28 08:45:22,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-10-28 08:45:22,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:45:22,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-10-28 08:45:22,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=4247, Unknown=1, NotChecked=130, Total=4556 [2021-10-28 08:45:22,368 INFO L87 Difference]: Start difference. First operand 109 states and 115 transitions. Second operand has 68 states, 64 states have (on average 1.578125) internal successors, (101), 56 states have internal predecessors, (101), 9 states have call successors, (15), 7 states have call predecessors, (15), 12 states have return successors, (13), 12 states have call predecessors, (13), 9 states have call successors, (13) [2021-10-28 08:45:38,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:45:38,543 INFO L93 Difference]: Finished difference Result 132 states and 138 transitions. [2021-10-28 08:45:38,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-28 08:45:38,544 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 64 states have (on average 1.578125) internal successors, (101), 56 states have internal predecessors, (101), 9 states have call successors, (15), 7 states have call predecessors, (15), 12 states have return successors, (13), 12 states have call predecessors, (13), 9 states have call successors, (13) Word has length 70 [2021-10-28 08:45:38,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:45:38,545 INFO L225 Difference]: With dead ends: 132 [2021-10-28 08:45:38,545 INFO L226 Difference]: Without dead ends: 132 [2021-10-28 08:45:38,549 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1357 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=498, Invalid=9196, Unknown=12, NotChecked=194, Total=9900 [2021-10-28 08:45:38,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-10-28 08:45:38,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 109. [2021-10-28 08:45:38,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 79 states have (on average 1.2025316455696202) internal successors, (95), 90 states have internal predecessors, (95), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-28 08:45:38,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 114 transitions. [2021-10-28 08:45:38,554 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 114 transitions. Word has length 70 [2021-10-28 08:45:38,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:45:38,555 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 114 transitions. [2021-10-28 08:45:38,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 64 states have (on average 1.578125) internal successors, (101), 56 states have internal predecessors, (101), 9 states have call successors, (15), 7 states have call predecessors, (15), 12 states have return successors, (13), 12 states have call predecessors, (13), 9 states have call successors, (13) [2021-10-28 08:45:38,556 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 114 transitions. [2021-10-28 08:45:38,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-10-28 08:45:38,557 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:45:38,558 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:45:38,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-28 08:45:38,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:45:38,783 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 08:45:38,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:45:38,784 INFO L85 PathProgramCache]: Analyzing trace with hash -734251570, now seen corresponding path program 1 times [2021-10-28 08:45:38,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:45:38,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025069566] [2021-10-28 08:45:38,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:45:38,784 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:45:38,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:39,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:45:39,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:39,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:45:39,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:39,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 08:45:39,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:39,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 08:45:39,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:39,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 08:45:39,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:39,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-10-28 08:45:39,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:39,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-10-28 08:45:39,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:39,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-10-28 08:45:39,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:39,401 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 19 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-28 08:45:39,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:45:39,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025069566] [2021-10-28 08:45:39,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025069566] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:45:39,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839006060] [2021-10-28 08:45:39,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:45:39,402 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:45:39,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:45:39,403 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:45:39,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-28 08:45:39,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:39,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 56 conjunts are in the unsatisfiable core [2021-10-28 08:45:39,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:45:40,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-28 08:45:40,816 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-10-28 08:45:40,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-10-28 08:45:40,864 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-28 08:45:40,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839006060] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:45:40,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:45:40,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 17] total 40 [2021-10-28 08:45:40,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266438222] [2021-10-28 08:45:40,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-10-28 08:45:40,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:45:40,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-10-28 08:45:40,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1448, Unknown=0, NotChecked=0, Total=1560 [2021-10-28 08:45:40,867 INFO L87 Difference]: Start difference. First operand 109 states and 114 transitions. Second operand has 40 states, 36 states have (on average 2.9444444444444446) internal successors, (106), 35 states have internal predecessors, (106), 10 states have call successors, (17), 5 states have call predecessors, (17), 8 states have return successors, (14), 12 states have call predecessors, (14), 10 states have call successors, (14) [2021-10-28 08:45:43,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:45:43,021 INFO L93 Difference]: Finished difference Result 140 states and 146 transitions. [2021-10-28 08:45:43,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-28 08:45:43,021 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 36 states have (on average 2.9444444444444446) internal successors, (106), 35 states have internal predecessors, (106), 10 states have call successors, (17), 5 states have call predecessors, (17), 8 states have return successors, (14), 12 states have call predecessors, (14), 10 states have call successors, (14) Word has length 81 [2021-10-28 08:45:43,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:45:43,022 INFO L225 Difference]: With dead ends: 140 [2021-10-28 08:45:43,023 INFO L226 Difference]: Without dead ends: 140 [2021-10-28 08:45:43,024 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 954 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=360, Invalid=3800, Unknown=0, NotChecked=0, Total=4160 [2021-10-28 08:45:43,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-10-28 08:45:43,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 115. [2021-10-28 08:45:43,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 84 states have (on average 1.1904761904761905) internal successors, (100), 95 states have internal predecessors, (100), 10 states have call successors, (10), 9 states have call predecessors, (10), 9 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2021-10-28 08:45:43,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 120 transitions. [2021-10-28 08:45:43,029 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 120 transitions. Word has length 81 [2021-10-28 08:45:43,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:45:43,030 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 120 transitions. [2021-10-28 08:45:43,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 36 states have (on average 2.9444444444444446) internal successors, (106), 35 states have internal predecessors, (106), 10 states have call successors, (17), 5 states have call predecessors, (17), 8 states have return successors, (14), 12 states have call predecessors, (14), 10 states have call successors, (14) [2021-10-28 08:45:43,031 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 120 transitions. [2021-10-28 08:45:43,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-10-28 08:45:43,031 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:45:43,032 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] [2021-10-28 08:45:43,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-28 08:45:43,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:45:43,232 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 08:45:43,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:45:43,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1897701511, now seen corresponding path program 2 times [2021-10-28 08:45:43,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:45:43,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93070372] [2021-10-28 08:45:43,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:45:43,233 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:45:43,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:43,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:45:43,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:43,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:45:43,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:43,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 08:45:43,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:43,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 08:45:43,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:43,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 08:45:43,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:43,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-10-28 08:45:43,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:43,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-10-28 08:45:43,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:43,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-10-28 08:45:43,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:43,421 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-28 08:45:43,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:45:43,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93070372] [2021-10-28 08:45:43,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93070372] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:45:43,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44212410] [2021-10-28 08:45:43,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 08:45:43,422 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:45:43,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:45:43,424 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:45:43,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-28 08:45:44,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 08:45:44,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:45:44,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 08:45:44,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:45:44,471 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-28 08:45:44,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44212410] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:45:44,471 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:45:44,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 15 [2021-10-28 08:45:44,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532785122] [2021-10-28 08:45:44,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-28 08:45:44,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:45:44,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 08:45:44,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-10-28 08:45:44,473 INFO L87 Difference]: Start difference. First operand 115 states and 120 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 12 states have internal predecessors, (74), 6 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2021-10-28 08:45:44,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:45:44,923 INFO L93 Difference]: Finished difference Result 130 states and 135 transitions. [2021-10-28 08:45:44,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 08:45:44,923 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 12 states have internal predecessors, (74), 6 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) Word has length 84 [2021-10-28 08:45:44,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:45:44,929 INFO L225 Difference]: With dead ends: 130 [2021-10-28 08:45:44,929 INFO L226 Difference]: Without dead ends: 123 [2021-10-28 08:45:44,929 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-10-28 08:45:44,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-10-28 08:45:44,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 104. [2021-10-28 08:45:44,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 75 states have (on average 1.1866666666666668) internal successors, (89), 85 states have internal predecessors, (89), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-28 08:45:44,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2021-10-28 08:45:44,943 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 84 [2021-10-28 08:45:44,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:45:44,944 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2021-10-28 08:45:44,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 12 states have internal predecessors, (74), 6 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2021-10-28 08:45:44,946 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2021-10-28 08:45:44,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-10-28 08:45:44,946 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:45:44,947 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:45:44,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-28 08:45:45,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-28 08:45:45,164 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting sll_circular_destroyErr0REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 08:45:45,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:45:45,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1533729650, now seen corresponding path program 1 times [2021-10-28 08:45:45,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:45:45,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745142100] [2021-10-28 08:45:45,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:45:45,165 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:45:45,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:45,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:45:45,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:45,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:45:45,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:45,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 08:45:45,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:45,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 08:45:45,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:45,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 08:45:45,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:45,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-10-28 08:45:45,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:45,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-10-28 08:45:45,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:45,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-10-28 08:45:45,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:45,297 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-10-28 08:45:45,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:45:45,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745142100] [2021-10-28 08:45:45,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745142100] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:45:45,298 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:45:45,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-28 08:45:45,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374397971] [2021-10-28 08:45:45,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 08:45:45,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:45:45,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 08:45:45,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-10-28 08:45:45,300 INFO L87 Difference]: Start difference. First operand 104 states and 108 transitions. Second operand has 10 states, 9 states have (on average 6.111111111111111) internal successors, (55), 6 states have internal predecessors, (55), 2 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-10-28 08:45:45,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:45:45,798 INFO L93 Difference]: Finished difference Result 124 states and 128 transitions. [2021-10-28 08:45:45,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 08:45:45,799 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 6.111111111111111) internal successors, (55), 6 states have internal predecessors, (55), 2 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 86 [2021-10-28 08:45:45,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:45:45,800 INFO L225 Difference]: With dead ends: 124 [2021-10-28 08:45:45,800 INFO L226 Difference]: Without dead ends: 124 [2021-10-28 08:45:45,800 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-10-28 08:45:45,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-10-28 08:45:45,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 107. [2021-10-28 08:45:45,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 79 states have (on average 1.2025316455696202) internal successors, (95), 88 states have internal predecessors, (95), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-28 08:45:45,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 114 transitions. [2021-10-28 08:45:45,804 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 114 transitions. Word has length 86 [2021-10-28 08:45:45,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:45:45,805 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 114 transitions. [2021-10-28 08:45:45,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 6.111111111111111) internal successors, (55), 6 states have internal predecessors, (55), 2 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-10-28 08:45:45,805 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 114 transitions. [2021-10-28 08:45:45,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-10-28 08:45:45,806 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:45:45,806 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:45:45,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-10-28 08:45:45,806 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting sll_circular_destroyErr1REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 08:45:45,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:45:45,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1533729649, now seen corresponding path program 1 times [2021-10-28 08:45:45,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:45:45,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147049262] [2021-10-28 08:45:45,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:45:45,809 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:45:45,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:45,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:45:45,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:45,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:45:45,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:46,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 08:45:46,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:46,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 08:45:46,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:46,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 08:45:46,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:46,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-10-28 08:45:46,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:46,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-10-28 08:45:46,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:46,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-10-28 08:45:46,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:46,114 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-28 08:45:46,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:45:46,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147049262] [2021-10-28 08:45:46,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147049262] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:45:46,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:45:46,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-10-28 08:45:46,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407388053] [2021-10-28 08:45:46,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-28 08:45:46,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:45:46,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 08:45:46,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-10-28 08:45:46,117 INFO L87 Difference]: Start difference. First operand 107 states and 114 transitions. Second operand has 15 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 9 states have internal predecessors, (53), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-10-28 08:45:46,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:45:46,791 INFO L93 Difference]: Finished difference Result 118 states and 123 transitions. [2021-10-28 08:45:46,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-28 08:45:46,792 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 9 states have internal predecessors, (53), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 86 [2021-10-28 08:45:46,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:45:46,793 INFO L225 Difference]: With dead ends: 118 [2021-10-28 08:45:46,793 INFO L226 Difference]: Without dead ends: 118 [2021-10-28 08:45:46,794 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-10-28 08:45:46,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-10-28 08:45:46,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 105. [2021-10-28 08:45:46,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 79 states have (on average 1.1645569620253164) internal successors, (92), 86 states have internal predecessors, (92), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-28 08:45:46,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 111 transitions. [2021-10-28 08:45:46,798 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 111 transitions. Word has length 86 [2021-10-28 08:45:46,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:45:46,799 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 111 transitions. [2021-10-28 08:45:46,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 9 states have internal predecessors, (53), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-10-28 08:45:46,799 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 111 transitions. [2021-10-28 08:45:46,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-10-28 08:45:46,800 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:45:46,800 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:45:46,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-10-28 08:45:46,801 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting sll_circular_destroyErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 08:45:46,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:45:46,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1477834531, now seen corresponding path program 1 times [2021-10-28 08:45:46,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:45:46,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788628543] [2021-10-28 08:45:46,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:45:46,802 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:45:46,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:46,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:45:46,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:46,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:45:46,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:46,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 08:45:46,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:46,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 08:45:46,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:46,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 08:45:46,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:46,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-10-28 08:45:46,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:46,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-10-28 08:45:46,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:47,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-10-28 08:45:47,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:47,023 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-10-28 08:45:47,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:45:47,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788628543] [2021-10-28 08:45:47,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788628543] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:45:47,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901091640] [2021-10-28 08:45:47,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:45:47,024 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:45:47,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:45:47,027 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:45:47,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-28 08:45:47,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:47,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 56 conjunts are in the unsatisfiable core [2021-10-28 08:45:47,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:45:48,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-10-28 08:45:48,259 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-28 08:45:48,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901091640] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:45:48,259 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:45:48,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 25 [2021-10-28 08:45:48,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150480734] [2021-10-28 08:45:48,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-28 08:45:48,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:45:48,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-28 08:45:48,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=593, Unknown=0, NotChecked=0, Total=650 [2021-10-28 08:45:48,261 INFO L87 Difference]: Start difference. First operand 105 states and 111 transitions. Second operand has 26 states, 25 states have (on average 3.68) internal successors, (92), 19 states have internal predecessors, (92), 4 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2021-10-28 08:45:49,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:45:49,440 INFO L93 Difference]: Finished difference Result 118 states and 122 transitions. [2021-10-28 08:45:49,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-28 08:45:49,441 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 3.68) internal successors, (92), 19 states have internal predecessors, (92), 4 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) Word has length 89 [2021-10-28 08:45:49,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:45:49,442 INFO L225 Difference]: With dead ends: 118 [2021-10-28 08:45:49,442 INFO L226 Difference]: Without dead ends: 118 [2021-10-28 08:45:49,443 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=185, Invalid=1537, Unknown=0, NotChecked=0, Total=1722 [2021-10-28 08:45:49,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-10-28 08:45:49,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 105. [2021-10-28 08:45:49,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 80 states have (on average 1.1625) internal successors, (93), 86 states have internal predecessors, (93), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-28 08:45:49,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 112 transitions. [2021-10-28 08:45:49,449 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 112 transitions. Word has length 89 [2021-10-28 08:45:49,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:45:49,449 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 112 transitions. [2021-10-28 08:45:49,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 3.68) internal successors, (92), 19 states have internal predecessors, (92), 4 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2021-10-28 08:45:49,450 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 112 transitions. [2021-10-28 08:45:49,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-10-28 08:45:49,451 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:45:49,451 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:45:49,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-28 08:45:49,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-28 08:45:49,652 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting sll_circular_destroyErr3REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 08:45:49,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:45:49,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1477834530, now seen corresponding path program 1 times [2021-10-28 08:45:49,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:45:49,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122655744] [2021-10-28 08:45:49,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:45:49,652 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:45:49,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:49,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:45:49,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:49,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:45:49,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:50,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 08:45:50,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:50,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 08:45:50,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:50,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 08:45:50,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:50,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-10-28 08:45:50,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:50,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-10-28 08:45:50,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:50,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-10-28 08:45:50,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:50,948 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 23 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-28 08:45:50,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:45:50,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122655744] [2021-10-28 08:45:50,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122655744] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:45:50,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321945507] [2021-10-28 08:45:50,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:45:50,949 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:45:50,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:45:50,950 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:45:50,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-28 08:45:51,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:51,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 110 conjunts are in the unsatisfiable core [2021-10-28 08:45:51,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:45:51,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 08:45:52,031 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 08:45:52,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 08:45:52,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 08:45:52,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 08:45:52,379 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-28 08:45:52,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 49 [2021-10-28 08:45:52,391 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-28 08:45:52,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 50 [2021-10-28 08:45:54,074 WARN L860 $PredicateComparison]: unable to prove that (exists ((sll_circular_update_at_~head.offset Int)) (= |c_#memory_$Pointer$.offset| (let ((.cse0 (select (select |c_old(#memory_$Pointer$.base)| |c_sll_circular_update_at_#in~head.base|) |c_sll_circular_update_at_#in~head.offset|))) (store |c_old(#memory_$Pointer$.offset)| .cse0 (let ((.cse1 (+ sll_circular_update_at_~head.offset 4))) (store (select |c_old(#memory_$Pointer$.offset)| .cse0) .cse1 (select (select |c_#memory_$Pointer$.offset| .cse0) .cse1))))))) is different from true [2021-10-28 08:45:54,105 INFO L354 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2021-10-28 08:45:54,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 65 [2021-10-28 08:45:54,151 INFO L354 Elim1Store]: treesize reduction 60, result has 36.8 percent of original size [2021-10-28 08:45:54,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 62 [2021-10-28 08:45:55,687 WARN L860 $PredicateComparison]: unable to prove that (exists ((sll_circular_update_at_~head.offset Int)) (and (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_sll_circular_update_at_#in~head.base| (let ((.cse0 (+ sll_circular_update_at_~head.offset 4))) (store (select |c_old(#memory_$Pointer$.offset)| |c_sll_circular_update_at_#in~head.base|) .cse0 (select (select |c_#memory_$Pointer$.offset| |c_sll_circular_update_at_#in~head.base|) .cse0))))) (<= |c_sll_circular_update_at_#in~head.offset| sll_circular_update_at_~head.offset))) is different from true [2021-10-28 08:45:55,735 INFO L354 Elim1Store]: treesize reduction 66, result has 24.1 percent of original size [2021-10-28 08:45:55,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 53 [2021-10-28 08:46:11,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 72 [2021-10-28 08:46:11,584 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-10-28 08:46:11,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 55 [2021-10-28 08:46:11,740 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-10-28 08:46:11,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321945507] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:46:11,740 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:46:11,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 37] total 68 [2021-10-28 08:46:11,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427990127] [2021-10-28 08:46:11,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-10-28 08:46:11,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:46:11,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-10-28 08:46:11,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=4222, Unknown=4, NotChecked=262, Total=4692 [2021-10-28 08:46:11,743 INFO L87 Difference]: Start difference. First operand 105 states and 112 transitions. Second operand has 69 states, 68 states have (on average 1.8970588235294117) internal successors, (129), 55 states have internal predecessors, (129), 12 states have call successors, (19), 10 states have call predecessors, (19), 13 states have return successors, (15), 14 states have call predecessors, (15), 11 states have call successors, (15) [2021-10-28 08:46:24,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:46:24,821 INFO L93 Difference]: Finished difference Result 115 states and 120 transitions. [2021-10-28 08:46:24,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-28 08:46:24,822 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 1.8970588235294117) internal successors, (129), 55 states have internal predecessors, (129), 12 states have call successors, (19), 10 states have call predecessors, (19), 13 states have return successors, (15), 14 states have call predecessors, (15), 11 states have call successors, (15) Word has length 89 [2021-10-28 08:46:24,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:46:24,824 INFO L225 Difference]: With dead ends: 115 [2021-10-28 08:46:24,824 INFO L226 Difference]: Without dead ends: 115 [2021-10-28 08:46:24,825 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1693 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=573, Invalid=8551, Unknown=4, NotChecked=378, Total=9506 [2021-10-28 08:46:24,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-10-28 08:46:24,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 107. [2021-10-28 08:46:24,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 82 states have (on average 1.146341463414634) internal successors, (94), 88 states have internal predecessors, (94), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-28 08:46:24,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 113 transitions. [2021-10-28 08:46:24,830 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 113 transitions. Word has length 89 [2021-10-28 08:46:24,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:46:24,831 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 113 transitions. [2021-10-28 08:46:24,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 68 states have (on average 1.8970588235294117) internal successors, (129), 55 states have internal predecessors, (129), 12 states have call successors, (19), 10 states have call predecessors, (19), 13 states have return successors, (15), 14 states have call predecessors, (15), 11 states have call successors, (15) [2021-10-28 08:46:24,832 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 113 transitions. [2021-10-28 08:46:24,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-10-28 08:46:24,833 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:46:24,833 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:46:24,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-28 08:46:25,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-28 08:46:25,055 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr1ENSURES_VIOLATIONMEMORY_LEAK === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 08:46:25,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:46:25,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1445302179, now seen corresponding path program 1 times [2021-10-28 08:46:25,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:46:25,056 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639720485] [2021-10-28 08:46:25,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:46:25,056 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:46:25,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:46:25,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:46:25,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:46:25,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:46:25,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:46:25,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 08:46:25,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:46:25,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 08:46:25,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:46:25,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 08:46:25,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:46:25,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-10-28 08:46:25,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:46:25,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-10-28 08:46:25,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:46:25,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-10-28 08:46:25,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:46:25,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-10-28 08:46:25,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:46:25,298 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-28 08:46:25,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:46:25,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639720485] [2021-10-28 08:46:25,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639720485] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:46:25,299 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:46:25,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-10-28 08:46:25,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402793562] [2021-10-28 08:46:25,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-28 08:46:25,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:46:25,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-28 08:46:25,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-10-28 08:46:25,302 INFO L87 Difference]: Start difference. First operand 107 states and 113 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 10 states have internal predecessors, (55), 2 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 2 states have call successors, (7) [2021-10-28 08:46:25,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:46:25,831 INFO L93 Difference]: Finished difference Result 113 states and 117 transitions. [2021-10-28 08:46:25,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-28 08:46:25,832 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 10 states have internal predecessors, (55), 2 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 2 states have call successors, (7) Word has length 89 [2021-10-28 08:46:25,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:46:25,833 INFO L225 Difference]: With dead ends: 113 [2021-10-28 08:46:25,833 INFO L226 Difference]: Without dead ends: 111 [2021-10-28 08:46:25,834 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-10-28 08:46:25,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-10-28 08:46:25,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2021-10-28 08:46:25,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 82 states have (on average 1.1341463414634145) internal successors, (93), 88 states have internal predecessors, (93), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-28 08:46:25,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 112 transitions. [2021-10-28 08:46:25,839 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 112 transitions. Word has length 89 [2021-10-28 08:46:25,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:46:25,839 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 112 transitions. [2021-10-28 08:46:25,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 10 states have internal predecessors, (55), 2 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 2 states have call successors, (7) [2021-10-28 08:46:25,840 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 112 transitions. [2021-10-28 08:46:25,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-10-28 08:46:25,841 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:46:25,841 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:46:25,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-10-28 08:46:25,841 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting sll_circular_destroyErr8ASSERT_VIOLATIONMEMORY_FREE === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 08:46:25,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:46:25,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1431768405, now seen corresponding path program 1 times [2021-10-28 08:46:25,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:46:25,842 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251558874] [2021-10-28 08:46:25,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:46:25,843 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:46:25,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:46:25,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:46:25,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:46:25,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:46:25,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:46:26,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 08:46:26,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:46:26,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 08:46:26,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:46:26,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 08:46:26,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:46:26,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-10-28 08:46:26,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:46:26,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-10-28 08:46:26,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:46:26,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-10-28 08:46:26,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:46:26,114 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-28 08:46:26,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:46:26,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251558874] [2021-10-28 08:46:26,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251558874] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:46:26,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:46:26,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-10-28 08:46:26,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433539955] [2021-10-28 08:46:26,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-28 08:46:26,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:46:26,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 08:46:26,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-10-28 08:46:26,117 INFO L87 Difference]: Start difference. First operand 107 states and 112 transitions. Second operand has 15 states, 14 states have (on average 4.071428571428571) internal successors, (57), 9 states have internal predecessors, (57), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-10-28 08:46:26,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:46:26,681 INFO L93 Difference]: Finished difference Result 109 states and 113 transitions. [2021-10-28 08:46:26,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-28 08:46:26,681 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.071428571428571) internal successors, (57), 9 states have internal predecessors, (57), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 90 [2021-10-28 08:46:26,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:46:26,682 INFO L225 Difference]: With dead ends: 109 [2021-10-28 08:46:26,682 INFO L226 Difference]: Without dead ends: 109 [2021-10-28 08:46:26,683 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-10-28 08:46:26,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-10-28 08:46:26,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 106. [2021-10-28 08:46:26,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 82 states have (on average 1.1097560975609757) internal successors, (91), 87 states have internal predecessors, (91), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-28 08:46:26,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 110 transitions. [2021-10-28 08:46:26,687 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 110 transitions. Word has length 90 [2021-10-28 08:46:26,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:46:26,687 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 110 transitions. [2021-10-28 08:46:26,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.071428571428571) internal successors, (57), 9 states have internal predecessors, (57), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-10-28 08:46:26,688 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 110 transitions. [2021-10-28 08:46:26,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-10-28 08:46:26,688 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:46:26,689 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:46:26,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-10-28 08:46:26,689 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting sll_circular_destroyErr5ASSERT_VIOLATIONMEMORY_FREE === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 08:46:26,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:46:26,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1541324730, now seen corresponding path program 1 times [2021-10-28 08:46:26,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:46:26,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451016455] [2021-10-28 08:46:26,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:46:26,691 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:46:26,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:46:26,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:46:26,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:46:26,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:46:26,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:46:27,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 08:46:27,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:46:27,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 08:46:27,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:46:27,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 08:46:27,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:46:27,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-10-28 08:46:27,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:46:27,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-10-28 08:46:27,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:46:27,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-10-28 08:46:27,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:46:27,709 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-28 08:46:27,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:46:27,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451016455] [2021-10-28 08:46:27,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451016455] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:46:27,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913680869] [2021-10-28 08:46:27,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:46:27,710 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:46:27,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:46:27,712 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:46:27,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-28 08:46:28,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:46:28,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 87 conjunts are in the unsatisfiable core [2021-10-28 08:46:28,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:46:28,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 08:46:28,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-10-28 08:46:28,851 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 08:46:28,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 08:46:28,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 08:46:28,987 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-28 08:46:28,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2021-10-28 08:46:29,253 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 08:46:29,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 16 [2021-10-28 08:46:30,741 WARN L860 $PredicateComparison]: unable to prove that (exists ((sll_circular_update_at_~head.offset Int)) (= |c_#memory_$Pointer$.base| (let ((.cse0 (select (select |c_old(#memory_$Pointer$.base)| |c_sll_circular_update_at_#in~head.base|) |c_sll_circular_update_at_#in~head.offset|))) (store |c_old(#memory_$Pointer$.base)| .cse0 (let ((.cse1 (+ sll_circular_update_at_~head.offset 4))) (store (select |c_old(#memory_$Pointer$.base)| .cse0) .cse1 (select (select |c_#memory_$Pointer$.base| .cse0) .cse1))))))) is different from true [2021-10-28 08:46:30,785 INFO L354 Elim1Store]: treesize reduction 127, result has 15.9 percent of original size [2021-10-28 08:46:30,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 57 [2021-10-28 08:46:30,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-10-28 08:46:31,826 WARN L860 $PredicateComparison]: unable to prove that (exists ((sll_circular_update_at_~head.offset Int)) (and (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_sll_circular_update_at_#in~head.base| (let ((.cse0 (+ sll_circular_update_at_~head.offset 4))) (store (select |c_old(#memory_$Pointer$.base)| |c_sll_circular_update_at_#in~head.base|) .cse0 (select (select |c_#memory_$Pointer$.base| |c_sll_circular_update_at_#in~head.base|) .cse0))))) (<= |c_sll_circular_update_at_#in~head.offset| sll_circular_update_at_~head.offset))) is different from true [2021-10-28 08:46:31,851 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-10-28 08:46:31,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 20 [2021-10-28 08:46:32,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-28 08:46:32,371 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 18 trivial. 2 not checked. [2021-10-28 08:46:32,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913680869] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:46:32,371 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:46:32,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 45 [2021-10-28 08:46:32,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517783287] [2021-10-28 08:46:32,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-10-28 08:46:32,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:46:32,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-10-28 08:46:32,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1752, Unknown=2, NotChecked=170, Total=2070 [2021-10-28 08:46:32,374 INFO L87 Difference]: Start difference. First operand 106 states and 110 transitions. Second operand has 46 states, 45 states have (on average 2.4) internal successors, (108), 35 states have internal predecessors, (108), 6 states have call successors, (17), 9 states have call predecessors, (17), 10 states have return successors, (11), 8 states have call predecessors, (11), 6 states have call successors, (11) [2021-10-28 08:46:38,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:46:38,471 INFO L93 Difference]: Finished difference Result 110 states and 114 transitions. [2021-10-28 08:46:38,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-28 08:46:38,471 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.4) internal successors, (108), 35 states have internal predecessors, (108), 6 states have call successors, (17), 9 states have call predecessors, (17), 10 states have return successors, (11), 8 states have call predecessors, (11), 6 states have call successors, (11) Word has length 92 [2021-10-28 08:46:38,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:46:38,472 INFO L225 Difference]: With dead ends: 110 [2021-10-28 08:46:38,472 INFO L226 Difference]: Without dead ends: 110 [2021-10-28 08:46:38,473 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 80 SyntacticMatches, 9 SemanticMatches, 66 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=432, Invalid=3864, Unknown=2, NotChecked=258, Total=4556 [2021-10-28 08:46:38,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-10-28 08:46:38,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2021-10-28 08:46:38,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 83 states have (on average 1.108433734939759) internal successors, (92), 88 states have internal predecessors, (92), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-28 08:46:38,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2021-10-28 08:46:38,478 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 92 [2021-10-28 08:46:38,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:46:38,489 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2021-10-28 08:46:38,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.4) internal successors, (108), 35 states have internal predecessors, (108), 6 states have call successors, (17), 9 states have call predecessors, (17), 10 states have return successors, (11), 8 states have call predecessors, (11), 6 states have call successors, (11) [2021-10-28 08:46:38,490 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2021-10-28 08:46:38,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-10-28 08:46:38,493 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:46:38,493 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:46:38,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-28 08:46:38,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:46:38,716 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting sll_circular_destroyErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 08:46:38,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:46:38,717 INFO L85 PathProgramCache]: Analyzing trace with hash 109821506, now seen corresponding path program 1 times [2021-10-28 08:46:38,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:46:38,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149943587] [2021-10-28 08:46:38,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:46:38,717 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:46:38,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:46:39,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:46:39,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:46:39,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:46:39,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:46:39,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 08:46:39,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:46:39,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 08:46:39,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:46:39,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 08:46:39,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:46:40,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-10-28 08:46:40,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:46:40,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-10-28 08:46:40,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:46:40,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-10-28 08:46:40,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:46:40,381 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-28 08:46:40,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:46:40,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149943587] [2021-10-28 08:46:40,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149943587] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:46:40,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473579478] [2021-10-28 08:46:40,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:46:40,382 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:46:40,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:46:40,384 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:46:40,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-28 08:46:41,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:46:41,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 122 conjunts are in the unsatisfiable core [2021-10-28 08:46:41,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:46:41,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 08:46:41,611 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 08:46:41,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 08:46:41,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 08:46:41,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 08:46:41,933 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-28 08:46:41,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 48 [2021-10-28 08:46:41,946 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-28 08:46:41,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 44 [2021-10-28 08:46:44,567 WARN L860 $PredicateComparison]: unable to prove that (exists ((sll_circular_update_at_~head.offset Int)) (let ((.cse0 (select (select |c_old(#memory_$Pointer$.base)| |c_sll_circular_update_at_#in~head.base|) |c_sll_circular_update_at_#in~head.offset|)) (.cse1 (+ sll_circular_update_at_~head.offset 4))) (and (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| .cse0 (store (select |c_old(#memory_$Pointer$.base)| .cse0) .cse1 (select (select |c_#memory_$Pointer$.base| .cse0) .cse1)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| .cse0 (store (select |c_old(#memory_$Pointer$.offset)| .cse0) .cse1 (select (select |c_#memory_$Pointer$.offset| .cse0) .cse1)))) (<= (select (select |c_old(#memory_$Pointer$.offset)| |c_sll_circular_update_at_#in~head.base|) |c_sll_circular_update_at_#in~head.offset|) sll_circular_update_at_~head.offset)))) is different from true [2021-10-28 08:46:44,624 INFO L354 Elim1Store]: treesize reduction 153, result has 12.6 percent of original size [2021-10-28 08:46:44,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 115 treesize of output 94 [2021-10-28 08:46:44,651 INFO L354 Elim1Store]: treesize reduction 165, result has 11.8 percent of original size [2021-10-28 08:46:44,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 53 [2021-10-28 08:46:46,377 WARN L860 $PredicateComparison]: unable to prove that (exists ((sll_circular_update_at_~head.offset Int)) (let ((.cse0 (+ sll_circular_update_at_~head.offset 4))) (and (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_sll_circular_update_at_#in~head.base| (store (select |c_old(#memory_$Pointer$.offset)| |c_sll_circular_update_at_#in~head.base|) .cse0 (select (select |c_#memory_$Pointer$.offset| |c_sll_circular_update_at_#in~head.base|) .cse0)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_sll_circular_update_at_#in~head.base| (store (select |c_old(#memory_$Pointer$.base)| |c_sll_circular_update_at_#in~head.base|) .cse0 (select (select |c_#memory_$Pointer$.base| |c_sll_circular_update_at_#in~head.base|) .cse0)))) (<= |c_sll_circular_update_at_#in~head.offset| sll_circular_update_at_~head.offset)))) is different from true [2021-10-28 08:46:46,423 INFO L354 Elim1Store]: treesize reduction 88, result has 17.8 percent of original size [2021-10-28 08:46:46,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 69 [2021-10-28 08:46:46,440 INFO L354 Elim1Store]: treesize reduction 88, result has 17.8 percent of original size [2021-10-28 08:46:46,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 50 [2021-10-28 08:46:51,615 INFO L354 Elim1Store]: treesize reduction 69, result has 9.2 percent of original size [2021-10-28 08:46:51,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 55 [2021-10-28 08:46:51,635 INFO L354 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2021-10-28 08:46:51,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 29 [2021-10-28 08:46:51,877 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 2 not checked. [2021-10-28 08:46:51,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473579478] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:46:51,877 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:46:51,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 33] total 63 [2021-10-28 08:46:51,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105529572] [2021-10-28 08:46:51,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-10-28 08:46:51,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:46:51,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-10-28 08:46:51,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=3469, Unknown=3, NotChecked=238, Total=3906 [2021-10-28 08:46:51,879 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand has 63 states, 63 states have (on average 1.9841269841269842) internal successors, (125), 50 states have internal predecessors, (125), 7 states have call successors, (16), 9 states have call predecessors, (16), 11 states have return successors, (13), 10 states have call predecessors, (13), 7 states have call successors, (13) [2021-10-28 08:47:25,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:47:25,957 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2021-10-28 08:47:25,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-28 08:47:25,958 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.9841269841269842) internal successors, (125), 50 states have internal predecessors, (125), 7 states have call successors, (16), 9 states have call predecessors, (16), 11 states have return successors, (13), 10 states have call predecessors, (13), 7 states have call successors, (13) Word has length 95 [2021-10-28 08:47:25,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:47:25,958 INFO L225 Difference]: With dead ends: 96 [2021-10-28 08:47:25,958 INFO L226 Difference]: Without dead ends: 96 [2021-10-28 08:47:25,959 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 75 SyntacticMatches, 4 SemanticMatches, 84 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1162 ImplicationChecksByTransitivity, 24.8s TimeCoverageRelationStatistics Valid=499, Invalid=6475, Unknown=6, NotChecked=330, Total=7310 [2021-10-28 08:47:25,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-10-28 08:47:25,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-10-28 08:47:25,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 77 states have internal predecessors, (79), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-28 08:47:25,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2021-10-28 08:47:25,961 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 95 [2021-10-28 08:47:25,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:47:25,962 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2021-10-28 08:47:25,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.9841269841269842) internal successors, (125), 50 states have internal predecessors, (125), 7 states have call successors, (16), 9 states have call predecessors, (16), 11 states have return successors, (13), 10 states have call predecessors, (13), 7 states have call successors, (13) [2021-10-28 08:47:25,962 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2021-10-28 08:47:25,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-10-28 08:47:25,963 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:47:25,963 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:47:26,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-28 08:47:26,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-10-28 08:47:26,191 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting sll_circular_destroyErr9ASSERT_VIOLATIONMEMORY_FREE === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 08:47:26,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:47:26,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1835758062, now seen corresponding path program 1 times [2021-10-28 08:47:26,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:47:26,192 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084156335] [2021-10-28 08:47:26,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:47:26,192 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:47:26,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:26,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:47:26,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:26,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:47:26,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:26,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 08:47:26,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:26,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 08:47:26,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:26,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 08:47:26,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:26,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-10-28 08:47:26,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:26,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-10-28 08:47:26,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:26,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-10-28 08:47:26,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:26,926 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-10-28 08:47:26,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:47:26,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084156335] [2021-10-28 08:47:26,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084156335] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:47:26,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836589775] [2021-10-28 08:47:26,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:47:26,927 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:47:26,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:47:26,929 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:47:26,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-28 08:47:27,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:27,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 08:47:27,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:47:28,246 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 08:47:28,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 26 [2021-10-28 08:47:28,416 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-10-28 08:47:28,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836589775] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:47:28,416 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:47:28,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 7] total 35 [2021-10-28 08:47:28,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291547550] [2021-10-28 08:47:28,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-28 08:47:28,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:47:28,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-28 08:47:28,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1167, Unknown=0, NotChecked=0, Total=1260 [2021-10-28 08:47:28,418 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand has 36 states, 35 states have (on average 3.2857142857142856) internal successors, (115), 29 states have internal predecessors, (115), 4 states have call successors, (15), 5 states have call predecessors, (15), 6 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2021-10-28 08:47:29,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:47:29,835 INFO L93 Difference]: Finished difference Result 95 states and 97 transitions. [2021-10-28 08:47:29,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-28 08:47:29,836 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 3.2857142857142856) internal successors, (115), 29 states have internal predecessors, (115), 4 states have call successors, (15), 5 states have call predecessors, (15), 6 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) Word has length 97 [2021-10-28 08:47:29,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:47:29,836 INFO L225 Difference]: With dead ends: 95 [2021-10-28 08:47:29,836 INFO L226 Difference]: Without dead ends: 95 [2021-10-28 08:47:29,837 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=284, Invalid=2686, Unknown=0, NotChecked=0, Total=2970 [2021-10-28 08:47:29,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-10-28 08:47:29,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-10-28 08:47:29,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 76 states have internal predecessors, (78), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-28 08:47:29,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2021-10-28 08:47:29,839 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 97 [2021-10-28 08:47:29,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:47:29,840 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2021-10-28 08:47:29,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 3.2857142857142856) internal successors, (115), 29 states have internal predecessors, (115), 4 states have call successors, (15), 5 states have call predecessors, (15), 6 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2021-10-28 08:47:29,840 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2021-10-28 08:47:29,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-10-28 08:47:29,841 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:47:29,841 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:47:29,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-28 08:47:30,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:47:30,043 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting mainErr1ENSURES_VIOLATIONMEMORY_LEAK === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-28 08:47:30,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:47:30,044 INFO L85 PathProgramCache]: Analyzing trace with hash -85323018, now seen corresponding path program 1 times [2021-10-28 08:47:30,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:47:30,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522050780] [2021-10-28 08:47:30,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:47:30,044 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:47:30,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:30,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:47:30,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:30,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:47:30,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:30,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 08:47:30,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:30,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 08:47:30,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:30,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 08:47:30,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:30,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-10-28 08:47:30,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:30,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-10-28 08:47:30,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:30,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-10-28 08:47:30,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:30,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-10-28 08:47:30,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:31,425 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-10-28 08:47:31,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:47:31,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522050780] [2021-10-28 08:47:31,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522050780] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:47:31,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932863995] [2021-10-28 08:47:31,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:47:31,426 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:47:31,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:47:31,431 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:47:31,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-28 08:47:32,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:32,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 99 conjunts are in the unsatisfiable core [2021-10-28 08:47:32,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:47:32,798 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-10-28 08:47:32,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 31 [2021-10-28 08:47:32,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 08:47:33,115 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-28 08:47:33,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 32 [2021-10-28 08:47:33,492 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 08:47:33,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 31 [2021-10-28 08:47:33,496 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-28 08:47:33,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 21 [2021-10-28 08:47:46,326 INFO L354 Elim1Store]: treesize reduction 74, result has 22.1 percent of original size [2021-10-28 08:47:46,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 69 treesize of output 59 [2021-10-28 08:47:46,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-10-28 08:47:46,464 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-28 08:47:46,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 21 [2021-10-28 08:47:46,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2021-10-28 08:47:46,901 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 08:47:46,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 29 [2021-10-28 08:47:47,276 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 08:47:47,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 29 [2021-10-28 08:47:47,642 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 08:47:47,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 29 [2021-10-28 08:47:47,652 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 08:47:47,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2021-10-28 08:48:12,473 INFO L354 Elim1Store]: treesize reduction 17, result has 41.4 percent of original size [2021-10-28 08:48:12,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 55 [2021-10-28 08:48:12,485 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-10-28 08:48:12,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 43 [2021-10-28 08:48:12,622 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-28 08:48:12,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932863995] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:48:12,622 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:48:12,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 61 [2021-10-28 08:48:12,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847383163] [2021-10-28 08:48:12,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-10-28 08:48:12,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:48:12,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-10-28 08:48:12,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=3572, Unknown=13, NotChecked=0, Total=3782 [2021-10-28 08:48:12,625 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand has 62 states, 61 states have (on average 2.2459016393442623) internal successors, (137), 52 states have internal predecessors, (137), 8 states have call successors, (17), 8 states have call predecessors, (17), 13 states have return successors, (14), 11 states have call predecessors, (14), 8 states have call successors, (14) [2021-10-28 08:49:13,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:49:13,823 INFO L93 Difference]: Finished difference Result 94 states and 96 transitions. [2021-10-28 08:49:13,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-28 08:49:13,824 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 2.2459016393442623) internal successors, (137), 52 states have internal predecessors, (137), 8 states have call successors, (17), 8 states have call predecessors, (17), 13 states have return successors, (14), 11 states have call predecessors, (14), 8 states have call successors, (14) Word has length 101 [2021-10-28 08:49:13,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:49:13,825 INFO L225 Difference]: With dead ends: 94 [2021-10-28 08:49:13,825 INFO L226 Difference]: Without dead ends: 0 [2021-10-28 08:49:13,826 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 81 SyntacticMatches, 7 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1538 ImplicationChecksByTransitivity, 56.0s TimeCoverageRelationStatistics Valid=518, Invalid=7298, Unknown=16, NotChecked=0, Total=7832 [2021-10-28 08:49:13,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-28 08:49:13,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-28 08:49:13,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:49:13,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-28 08:49:13,827 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 101 [2021-10-28 08:49:13,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:49:13,827 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 08:49:13,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 2.2459016393442623) internal successors, (137), 52 states have internal predecessors, (137), 8 states have call successors, (17), 8 states have call predecessors, (17), 13 states have return successors, (14), 11 states have call predecessors, (14), 8 states have call successors, (14) [2021-10-28 08:49:13,828 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-28 08:49:13,828 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-28 08:49:13,830 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr0REQUIRES_VIOLATION [2021-10-28 08:49:13,831 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr1REQUIRES_VIOLATION [2021-10-28 08:49:13,831 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr2REQUIRES_VIOLATION [2021-10-28 08:49:13,831 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr3REQUIRES_VIOLATION [2021-10-28 08:49:13,831 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONMEMORY_LEAK [2021-10-28 08:49:13,831 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1ENSURES_VIOLATIONMEMORY_LEAK [2021-10-28 08:49:13,831 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_update_atErr0REQUIRES_VIOLATION [2021-10-28 08:49:13,832 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_update_atErr1REQUIRES_VIOLATION [2021-10-28 08:49:13,832 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_update_atErr2REQUIRES_VIOLATION [2021-10-28 08:49:13,832 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_update_atErr3REQUIRES_VIOLATION [2021-10-28 08:49:13,832 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_destroyErr0REQUIRES_VIOLATION [2021-10-28 08:49:13,832 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_destroyErr1REQUIRES_VIOLATION [2021-10-28 08:49:13,833 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_destroyErr2REQUIRES_VIOLATION [2021-10-28 08:49:13,833 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_destroyErr3REQUIRES_VIOLATION [2021-10-28 08:49:13,833 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_destroyErr4ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:49:13,833 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_destroyErr5ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:49:13,833 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_destroyErr6ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:49:13,833 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_destroyErr7ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:49:13,834 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_destroyErr8ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:49:13,834 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_destroyErr9ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:49:13,834 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_createErr0REQUIRES_VIOLATION [2021-10-28 08:49:13,834 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_createErr1REQUIRES_VIOLATION [2021-10-28 08:49:13,834 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_createErr2REQUIRES_VIOLATION [2021-10-28 08:49:13,835 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_createErr3REQUIRES_VIOLATION [2021-10-28 08:49:13,835 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_get_data_atErr0REQUIRES_VIOLATION [2021-10-28 08:49:13,835 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_get_data_atErr1REQUIRES_VIOLATION [2021-10-28 08:49:13,835 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_get_data_atErr2REQUIRES_VIOLATION [2021-10-28 08:49:13,835 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_get_data_atErr3REQUIRES_VIOLATION [2021-10-28 08:49:13,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-28 08:49:14,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-10-28 08:49:14,046 INFO L731 BasicCegarLoop]: Path program histogram: [3, 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] [2021-10-28 08:49:14,047 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 08:49:14,049 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 08:49:14 BoogieIcfgContainer [2021-10-28 08:49:14,049 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 08:49:14,050 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 08:49:14,050 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 08:49:14,050 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 08:49:14,051 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:42:38" (3/4) ... [2021-10-28 08:49:14,054 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-28 08:49:14,060 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2021-10-28 08:49:14,060 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-10-28 08:49:14,060 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure myexit [2021-10-28 08:49:14,060 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure sll_circular_get_data_at [2021-10-28 08:49:14,060 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2021-10-28 08:49:14,061 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2021-10-28 08:49:14,061 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure sll_circular_create [2021-10-28 08:49:14,061 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure sll_circular_destroy [2021-10-28 08:49:14,061 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-10-28 08:49:14,061 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure sll_circular_update_at [2021-10-28 08:49:14,061 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure node_create [2021-10-28 08:49:14,068 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 24 nodes and edges [2021-10-28 08:49:14,069 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2021-10-28 08:49:14,069 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-28 08:49:14,069 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 08:49:14,132 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/witness.graphml [2021-10-28 08:49:14,133 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 08:49:14,134 INFO L168 Benchmark]: Toolchain (without parser) took 397258.68 ms. Allocated memory was 96.5 MB in the beginning and 234.9 MB in the end (delta: 138.4 MB). Free memory was 65.5 MB in the beginning and 101.2 MB in the end (delta: -35.6 MB). Peak memory consumption was 102.8 MB. Max. memory is 16.1 GB. [2021-10-28 08:49:14,135 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 96.5 MB. Free memory is still 51.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 08:49:14,135 INFO L168 Benchmark]: CACSL2BoogieTranslator took 784.59 ms. Allocated memory was 96.5 MB in the beginning and 134.2 MB in the end (delta: 37.7 MB). Free memory was 65.3 MB in the beginning and 103.4 MB in the end (delta: -38.1 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-28 08:49:14,135 INFO L168 Benchmark]: Boogie Preprocessor took 114.55 ms. Allocated memory is still 134.2 MB. Free memory was 103.4 MB in the beginning and 100.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 08:49:14,136 INFO L168 Benchmark]: RCFGBuilder took 867.41 ms. Allocated memory is still 134.2 MB. Free memory was 100.4 MB in the beginning and 76.3 MB in the end (delta: 24.1 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2021-10-28 08:49:14,136 INFO L168 Benchmark]: TraceAbstraction took 395389.62 ms. Allocated memory was 134.2 MB in the beginning and 234.9 MB in the end (delta: 100.7 MB). Free memory was 76.3 MB in the beginning and 105.4 MB in the end (delta: -29.1 MB). Peak memory consumption was 72.1 MB. Max. memory is 16.1 GB. [2021-10-28 08:49:14,136 INFO L168 Benchmark]: Witness Printer took 83.58 ms. Allocated memory is still 234.9 MB. Free memory was 105.4 MB in the beginning and 101.2 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-28 08:49:14,139 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 96.5 MB. Free memory is still 51.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 784.59 ms. Allocated memory was 96.5 MB in the beginning and 134.2 MB in the end (delta: 37.7 MB). Free memory was 65.3 MB in the beginning and 103.4 MB in the end (delta: -38.1 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 114.55 ms. Allocated memory is still 134.2 MB. Free memory was 103.4 MB in the beginning and 100.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 867.41 ms. Allocated memory is still 134.2 MB. Free memory was 100.4 MB in the beginning and 76.3 MB in the end (delta: 24.1 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 395389.62 ms. Allocated memory was 134.2 MB in the beginning and 234.9 MB in the end (delta: 100.7 MB). Free memory was 76.3 MB in the beginning and 105.4 MB in the end (delta: -29.1 MB). Peak memory consumption was 72.1 MB. Max. memory is 16.1 GB. * Witness Printer took 83.58 ms. Allocated memory is still 234.9 MB. Free memory was 105.4 MB in the beginning and 101.2 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 579]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 579]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 580]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 580]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 637]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 620]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 615]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 615]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 618]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 618]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 597]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 597]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 599]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 599]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 600]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 600]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 600]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 603]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 603]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 603]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 588]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 588]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 592]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 592]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 608]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 608]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 611]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 611]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 12 procedures, 114 locations, 28 error locations. Started 1 CEGAR loops. OverallTime: 395.3s, OverallIterations: 35, TraceHistogramMax: 3, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 219.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 2142 SDtfs, 6381 SDslu, 11420 SDs, 0 SdLazy, 40713 SolverSat, 1534 SolverUnsat, 76 SolverUnknown, 0 SolverNotchecked, 135.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2476 GetRequests, 1270 SyntacticMatches, 37 SemanticMatches, 1169 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 10877 ImplicationChecksByTransitivity, 208.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=148occurred in iteration=15, InterpolantAutomatonStates: 617, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 35 MinimizatonAttempts, 650 StatesRemovedByMinimization, 32 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 160.7s InterpolantComputationTime, 3330 NumberOfCodeBlocks, 3320 NumberOfCodeBlocksAsserted, 55 NumberOfCheckSat, 3277 ConstructedInterpolants, 261 QuantifiedInterpolants, 35602 SizeOfPredicates, 266 NumberOfNonLiveVariables, 6475 ConjunctsInSsa, 1042 ConjunctsInUnsatCore, 53 InterpolantComputations, 18 PerfectInterpolantSequences, 782/1144 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 28 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-28 08:49:14,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5010333b-4ddb-41d6-addc-d68f07196627/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...