./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2n_remove_all.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2n_remove_all.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bae9bfc842bb010963d083e19e9498cfd3af182f91f0b8fa56907786a4d462dd .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 23:18:29,604 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 23:18:29,606 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 23:18:29,637 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 23:18:29,638 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 23:18:29,639 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 23:18:29,641 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 23:18:29,643 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 23:18:29,645 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 23:18:29,646 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 23:18:29,647 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 23:18:29,649 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 23:18:29,650 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 23:18:29,651 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 23:18:29,652 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 23:18:29,654 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 23:18:29,658 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 23:18:29,661 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 23:18:29,663 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 23:18:29,668 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 23:18:29,673 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 23:18:29,674 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 23:18:29,676 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 23:18:29,677 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 23:18:29,683 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 23:18:29,684 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 23:18:29,684 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 23:18:29,689 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 23:18:29,692 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 23:18:29,694 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 23:18:29,695 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 23:18:29,696 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 23:18:29,698 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 23:18:29,699 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 23:18:29,701 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 23:18:29,701 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 23:18:29,702 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 23:18:29,702 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 23:18:29,703 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 23:18:29,704 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 23:18:29,704 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 23:18:29,705 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-28 23:18:29,741 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 23:18:29,741 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 23:18:29,742 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 23:18:29,742 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 23:18:29,744 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 23:18:29,744 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 23:18:29,745 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 23:18:29,745 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 23:18:29,745 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 23:18:29,745 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 23:18:29,746 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 23:18:29,747 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 23:18:29,747 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 23:18:29,747 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-28 23:18:29,747 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-28 23:18:29,748 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-28 23:18:29,748 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 23:18:29,748 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-28 23:18:29,748 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 23:18:29,749 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 23:18:29,749 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 23:18:29,749 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 23:18:29,749 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 23:18:29,750 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:18:29,750 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 23:18:29,750 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 23:18:29,750 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 23:18:29,751 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 23:18:29,751 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 23:18:29,752 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_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bae9bfc842bb010963d083e19e9498cfd3af182f91f0b8fa56907786a4d462dd [2021-10-28 23:18:30,054 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 23:18:30,080 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 23:18:30,082 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 23:18:30,084 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 23:18:30,085 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 23:18:30,086 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/../../sv-benchmarks/c/list-simple/sll2n_remove_all.i [2021-10-28 23:18:30,160 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/data/0575ef2a1/a6244e81e24e438a8f555c8ed0cfcc93/FLAG5000526c7 [2021-10-28 23:18:30,769 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 23:18:30,770 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/sv-benchmarks/c/list-simple/sll2n_remove_all.i [2021-10-28 23:18:30,782 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/data/0575ef2a1/a6244e81e24e438a8f555c8ed0cfcc93/FLAG5000526c7 [2021-10-28 23:18:31,084 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/data/0575ef2a1/a6244e81e24e438a8f555c8ed0cfcc93 [2021-10-28 23:18:31,089 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 23:18:31,092 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-28 23:18:31,095 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 23:18:31,095 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 23:18:31,098 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 23:18:31,099 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:18:31" (1/1) ... [2021-10-28 23:18:31,101 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e535af0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:18:31, skipping insertion in model container [2021-10-28 23:18:31,102 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:18:31" (1/1) ... [2021-10-28 23:18:31,109 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 23:18:31,167 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 23:18:31,508 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_83f8b3fa-3ab0-4be8-a801-ef5537a99826/sv-benchmarks/c/list-simple/sll2n_remove_all.i[23806,23819] [2021-10-28 23:18:31,512 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:18:31,525 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 23:18:31,585 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_83f8b3fa-3ab0-4be8-a801-ef5537a99826/sv-benchmarks/c/list-simple/sll2n_remove_all.i[23806,23819] [2021-10-28 23:18:31,587 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:18:31,621 INFO L208 MainTranslator]: Completed translation [2021-10-28 23:18:31,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:18:31 WrapperNode [2021-10-28 23:18:31,622 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 23:18:31,624 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 23:18:31,624 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 23:18:31,625 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 23:18:31,635 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:18:31" (1/1) ... [2021-10-28 23:18:31,636 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:18:31" (1/1) ... [2021-10-28 23:18:31,670 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:18:31" (1/1) ... [2021-10-28 23:18:31,671 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:18:31" (1/1) ... [2021-10-28 23:18:31,691 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:18:31" (1/1) ... [2021-10-28 23:18:31,694 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:18:31" (1/1) ... [2021-10-28 23:18:31,698 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:18:31" (1/1) ... [2021-10-28 23:18:31,704 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 23:18:31,705 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 23:18:31,705 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 23:18:31,706 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 23:18:31,706 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:18:31" (1/1) ... [2021-10-28 23:18:31,714 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:18:31,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:18:31,735 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 23:18:31,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 23:18:31,788 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-28 23:18:31,788 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 23:18:31,789 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-28 23:18:31,790 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-28 23:18:31,790 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-28 23:18:31,792 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-10-28 23:18:31,792 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-10-28 23:18:31,793 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2021-10-28 23:18:31,793 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_remove_first [2021-10-28 23:18:31,794 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-28 23:18:31,794 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-28 23:18:31,794 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-28 23:18:31,794 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-28 23:18:31,794 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-28 23:18:31,795 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-28 23:18:31,795 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 23:18:31,795 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-28 23:18:31,795 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-28 23:18:31,795 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-28 23:18:31,796 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-28 23:18:31,796 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-28 23:18:31,796 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-28 23:18:31,796 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-28 23:18:31,796 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-28 23:18:31,796 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-28 23:18:31,797 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-28 23:18:31,797 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-28 23:18:31,797 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-28 23:18:31,797 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-28 23:18:31,797 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-28 23:18:31,797 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-28 23:18:31,798 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-28 23:18:31,798 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-28 23:18:31,798 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-28 23:18:31,798 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-28 23:18:31,798 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-28 23:18:31,799 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-28 23:18:31,799 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-28 23:18:31,800 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-28 23:18:31,800 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-28 23:18:31,800 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-28 23:18:31,801 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-28 23:18:31,801 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-28 23:18:31,801 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-28 23:18:31,801 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-28 23:18:31,801 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-28 23:18:31,801 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-28 23:18:31,802 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-28 23:18:31,802 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-28 23:18:31,803 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-28 23:18:31,803 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-28 23:18:31,803 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-28 23:18:31,803 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-28 23:18:31,804 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-28 23:18:31,804 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-28 23:18:31,804 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-28 23:18:31,804 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-28 23:18:31,805 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-28 23:18:31,805 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-28 23:18:31,805 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-28 23:18:31,806 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-28 23:18:31,806 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-28 23:18:31,806 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-28 23:18:31,806 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-28 23:18:31,807 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-28 23:18:31,807 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-28 23:18:31,808 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-28 23:18:31,808 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-28 23:18:31,809 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-28 23:18:31,809 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-28 23:18:31,810 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-28 23:18:31,810 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-28 23:18:31,810 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-10-28 23:18:31,810 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-28 23:18:31,810 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-28 23:18:31,811 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-28 23:18:31,811 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-28 23:18:31,811 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-28 23:18:31,812 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-28 23:18:31,812 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-28 23:18:31,812 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-28 23:18:31,812 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-28 23:18:31,815 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-28 23:18:31,819 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-28 23:18:31,819 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-28 23:18:31,819 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-28 23:18:31,819 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-28 23:18:31,819 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-28 23:18:31,819 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-28 23:18:31,820 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-28 23:18:31,820 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-28 23:18:31,820 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-28 23:18:31,820 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-28 23:18:31,820 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-28 23:18:31,820 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-28 23:18:31,820 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-28 23:18:31,820 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-28 23:18:31,821 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-28 23:18:31,821 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-28 23:18:31,821 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-28 23:18:31,821 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-28 23:18:31,821 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-28 23:18:31,821 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-28 23:18:31,821 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-28 23:18:31,821 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-28 23:18:31,822 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-28 23:18:31,822 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-28 23:18:31,822 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-28 23:18:31,823 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-28 23:18:31,823 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-28 23:18:31,823 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-28 23:18:31,823 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-28 23:18:31,824 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-28 23:18:31,824 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-28 23:18:31,825 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-28 23:18:31,825 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-28 23:18:31,825 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-28 23:18:31,825 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-28 23:18:31,825 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-28 23:18:31,825 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-28 23:18:31,825 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-10-28 23:18:31,826 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-10-28 23:18:31,826 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-28 23:18:31,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-28 23:18:31,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-28 23:18:31,826 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2021-10-28 23:18:31,827 INFO L130 BoogieDeclarations]: Found specification of procedure sll_remove_first [2021-10-28 23:18:31,828 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-28 23:18:31,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 23:18:31,831 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-28 23:18:31,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-10-28 23:18:31,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-28 23:18:31,833 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 23:18:31,834 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 23:18:31,834 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-28 23:18:32,190 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-10-28 23:18:32,364 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 23:18:32,364 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-10-28 23:18:32,366 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:18:32 BoogieIcfgContainer [2021-10-28 23:18:32,366 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 23:18:32,368 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 23:18:32,368 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 23:18:32,371 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 23:18:32,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 11:18:31" (1/3) ... [2021-10-28 23:18:32,372 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36282bc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:18:32, skipping insertion in model container [2021-10-28 23:18:32,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:18:31" (2/3) ... [2021-10-28 23:18:32,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36282bc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:18:32, skipping insertion in model container [2021-10-28 23:18:32,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:18:32" (3/3) ... [2021-10-28 23:18:32,374 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2n_remove_all.i [2021-10-28 23:18:32,380 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 23:18:32,380 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 21 error locations. [2021-10-28 23:18:32,422 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 23:18:32,429 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 23:18:32,429 INFO L340 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2021-10-28 23:18:32,444 INFO L276 IsEmpty]: Start isEmpty. Operand has 70 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 58 states have internal predecessors, (64), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-28 23:18:32,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-28 23:18:32,451 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:18:32,452 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:18:32,453 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-10-28 23:18:32,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:18:32,458 INFO L85 PathProgramCache]: Analyzing trace with hash 692301555, now seen corresponding path program 1 times [2021-10-28 23:18:32,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:18:32,467 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189956267] [2021-10-28 23:18:32,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:18:32,468 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:18:32,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:32,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:18:32,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:32,844 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 23:18:32,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:18:32,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189956267] [2021-10-28 23:18:32,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189956267] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:18:32,846 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:18:32,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 23:18:32,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837355035] [2021-10-28 23:18:32,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:18:32,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:18:32,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:18:32,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:18:32,880 INFO L87 Difference]: Start difference. First operand has 70 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 58 states have internal predecessors, (64), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 23:18:33,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:18:33,106 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2021-10-28 23:18:33,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:18:33,108 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 13 [2021-10-28 23:18:33,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:18:33,117 INFO L225 Difference]: With dead ends: 73 [2021-10-28 23:18:33,118 INFO L226 Difference]: Without dead ends: 67 [2021-10-28 23:18:33,119 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 23:18:33,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-10-28 23:18:33,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 62. [2021-10-28 23:18:33,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 34 states have (on average 1.588235294117647) internal successors, (54), 52 states have internal predecessors, (54), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-28 23:18:33,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2021-10-28 23:18:33,159 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 13 [2021-10-28 23:18:33,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:18:33,160 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2021-10-28 23:18:33,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 23:18:33,160 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2021-10-28 23:18:33,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-28 23:18:33,161 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:18:33,161 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:18:33,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 23:18:33,162 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-10-28 23:18:33,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:18:33,163 INFO L85 PathProgramCache]: Analyzing trace with hash 692301556, now seen corresponding path program 1 times [2021-10-28 23:18:33,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:18:33,163 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084513476] [2021-10-28 23:18:33,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:18:33,164 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:18:33,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:33,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:18:33,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:33,251 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 23:18:33,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:18:33,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084513476] [2021-10-28 23:18:33,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084513476] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:18:33,252 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:18:33,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 23:18:33,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326634143] [2021-10-28 23:18:33,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:18:33,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:18:33,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:18:33,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:18:33,256 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 23:18:33,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:18:33,387 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2021-10-28 23:18:33,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:18:33,388 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 13 [2021-10-28 23:18:33,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:18:33,390 INFO L225 Difference]: With dead ends: 65 [2021-10-28 23:18:33,390 INFO L226 Difference]: Without dead ends: 65 [2021-10-28 23:18:33,391 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 23:18:33,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-10-28 23:18:33,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 60. [2021-10-28 23:18:33,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 50 states have internal predecessors, (52), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-28 23:18:33,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2021-10-28 23:18:33,413 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 13 [2021-10-28 23:18:33,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:18:33,414 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2021-10-28 23:18:33,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 23:18:33,414 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2021-10-28 23:18:33,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-28 23:18:33,416 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:18:33,416 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:18:33,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 23:18:33,416 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0REQUIRES_VIOLATION === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-10-28 23:18:33,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:18:33,418 INFO L85 PathProgramCache]: Analyzing trace with hash -44128920, now seen corresponding path program 1 times [2021-10-28 23:18:33,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:18:33,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206616595] [2021-10-28 23:18:33,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:18:33,420 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:18:33,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:33,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:18:33,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:33,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 23:18:33,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:33,575 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 23:18:33,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:18:33,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206616595] [2021-10-28 23:18:33,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206616595] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:18:33,576 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:18:33,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 23:18:33,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940825753] [2021-10-28 23:18:33,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 23:18:33,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:18:33,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 23:18:33,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:18:33,585 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 23:18:33,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:18:33,830 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2021-10-28 23:18:33,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 23:18:33,831 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2021-10-28 23:18:33,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:18:33,834 INFO L225 Difference]: With dead ends: 71 [2021-10-28 23:18:33,834 INFO L226 Difference]: Without dead ends: 68 [2021-10-28 23:18:33,834 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-28 23:18:33,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-10-28 23:18:33,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2021-10-28 23:18:33,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 51 states have internal predecessors, (53), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-28 23:18:33,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2021-10-28 23:18:33,852 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 15 [2021-10-28 23:18:33,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:18:33,852 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2021-10-28 23:18:33,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 23:18:33,853 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2021-10-28 23:18:33,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-28 23:18:33,854 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:18:33,854 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:18:33,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-28 23:18:33,854 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting sll_createErr0REQUIRES_VIOLATION === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-10-28 23:18:33,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:18:33,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1141220174, now seen corresponding path program 1 times [2021-10-28 23:18:33,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:18:33,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059747367] [2021-10-28 23:18:33,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:18:33,856 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:18:33,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:33,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:18:33,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:33,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 23:18:33,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:34,024 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 23:18:34,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:18:34,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059747367] [2021-10-28 23:18:34,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059747367] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:18:34,026 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:18:34,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 23:18:34,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034040697] [2021-10-28 23:18:34,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 23:18:34,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:18:34,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 23:18:34,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:18:34,029 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 23:18:34,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:18:34,291 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2021-10-28 23:18:34,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 23:18:34,292 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2021-10-28 23:18:34,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:18:34,296 INFO L225 Difference]: With dead ends: 61 [2021-10-28 23:18:34,296 INFO L226 Difference]: Without dead ends: 61 [2021-10-28 23:18:34,297 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 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 23:18:34,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-10-28 23:18:34,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2021-10-28 23:18:34,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 50 states have internal predecessors, (52), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-28 23:18:34,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2021-10-28 23:18:34,315 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 19 [2021-10-28 23:18:34,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:18:34,316 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2021-10-28 23:18:34,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 23:18:34,316 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2021-10-28 23:18:34,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-28 23:18:34,319 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:18:34,321 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 23:18:34,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-28 23:18:34,322 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting sll_createErr1REQUIRES_VIOLATION === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-10-28 23:18:34,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:18:34,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1141220173, now seen corresponding path program 1 times [2021-10-28 23:18:34,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:18:34,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80044064] [2021-10-28 23:18:34,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:18:34,333 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:18:34,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:34,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:18:34,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:34,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 23:18:34,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:34,492 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 23:18:34,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:18:34,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80044064] [2021-10-28 23:18:34,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80044064] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:18:34,493 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:18:34,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 23:18:34,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61598949] [2021-10-28 23:18:34,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 23:18:34,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:18:34,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 23:18:34,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:18:34,495 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 23:18:34,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:18:34,706 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2021-10-28 23:18:34,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 23:18:34,707 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2021-10-28 23:18:34,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:18:34,708 INFO L225 Difference]: With dead ends: 60 [2021-10-28 23:18:34,708 INFO L226 Difference]: Without dead ends: 60 [2021-10-28 23:18:34,708 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 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 23:18:34,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-10-28 23:18:34,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-10-28 23:18:34,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 35 states have (on average 1.457142857142857) internal successors, (51), 49 states have internal predecessors, (51), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-28 23:18:34,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2021-10-28 23:18:34,713 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 19 [2021-10-28 23:18:34,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:18:34,713 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2021-10-28 23:18:34,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 23:18:34,713 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2021-10-28 23:18:34,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-28 23:18:34,714 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:18:34,714 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:18:34,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-28 23:18:34,715 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0REQUIRES_VIOLATION === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-10-28 23:18:34,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:18:34,715 INFO L85 PathProgramCache]: Analyzing trace with hash 716638674, now seen corresponding path program 1 times [2021-10-28 23:18:34,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:18:34,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654879070] [2021-10-28 23:18:34,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:18:34,716 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:18:34,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:34,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:18:34,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:34,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 23:18:34,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:34,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:18:34,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:34,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:18:34,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:18:34,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654879070] [2021-10-28 23:18:34,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654879070] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:18:34,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283883971] [2021-10-28 23:18:34,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:18:34,834 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:18:34,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:18:34,836 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:18:34,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 23:18:35,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:35,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 23:18:35,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:18:35,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:18:35,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283883971] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:18:35,131 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:18:35,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 10 [2021-10-28 23:18:35,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207502588] [2021-10-28 23:18:35,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 23:18:35,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:18:35,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 23:18:35,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-28 23:18:35,134 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand has 10 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-28 23:18:35,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:18:35,350 INFO L93 Difference]: Finished difference Result 73 states and 76 transitions. [2021-10-28 23:18:35,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 23:18:35,351 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Word has length 28 [2021-10-28 23:18:35,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:18:35,352 INFO L225 Difference]: With dead ends: 73 [2021-10-28 23:18:35,352 INFO L226 Difference]: Without dead ends: 70 [2021-10-28 23:18:35,353 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-10-28 23:18:35,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-10-28 23:18:35,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2021-10-28 23:18:35,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 40 states have (on average 1.4) internal successors, (56), 54 states have internal predecessors, (56), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-28 23:18:35,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2021-10-28 23:18:35,357 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 28 [2021-10-28 23:18:35,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:18:35,358 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2021-10-28 23:18:35,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-28 23:18:35,358 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2021-10-28 23:18:35,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-10-28 23:18:35,360 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:18:35,360 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] [2021-10-28 23:18:35,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 23:18:35,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:18:35,574 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0REQUIRES_VIOLATION === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-10-28 23:18:35,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:18:35,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1795776088, now seen corresponding path program 2 times [2021-10-28 23:18:35,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:18:35,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819530237] [2021-10-28 23:18:35,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:18:35,575 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:18:35,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:35,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:18:35,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:35,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 23:18:35,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:35,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:18:35,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:35,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-10-28 23:18:35,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:35,724 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-28 23:18:35,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:18:35,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819530237] [2021-10-28 23:18:35,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819530237] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:18:35,725 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:18:35,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 23:18:35,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636540385] [2021-10-28 23:18:35,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 23:18:35,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:18:35,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 23:18:35,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:18:35,727 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-28 23:18:35,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:18:35,903 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2021-10-28 23:18:35,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 23:18:35,904 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2021-10-28 23:18:35,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:18:35,905 INFO L225 Difference]: With dead ends: 68 [2021-10-28 23:18:35,905 INFO L226 Difference]: Without dead ends: 68 [2021-10-28 23:18:35,906 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:18:35,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-10-28 23:18:35,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2021-10-28 23:18:35,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 55 states have internal predecessors, (57), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-28 23:18:35,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2021-10-28 23:18:35,910 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 41 [2021-10-28 23:18:35,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:18:35,910 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2021-10-28 23:18:35,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-28 23:18:35,911 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2021-10-28 23:18:35,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-28 23:18:35,923 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:18:35,923 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] [2021-10-28 23:18:35,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-28 23:18:35,923 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting sll_remove_firstErr0REQUIRES_VIOLATION === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-10-28 23:18:35,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:18:35,924 INFO L85 PathProgramCache]: Analyzing trace with hash 836136051, now seen corresponding path program 1 times [2021-10-28 23:18:35,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:18:35,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490832951] [2021-10-28 23:18:35,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:18:35,925 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:18:35,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:36,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:18:36,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:36,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 23:18:36,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:36,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:18:36,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:36,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-10-28 23:18:36,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:36,441 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-28 23:18:36,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:18:36,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490832951] [2021-10-28 23:18:36,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490832951] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:18:36,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298953556] [2021-10-28 23:18:36,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:18:36,443 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:18:36,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:18:36,444 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:18:36,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 23:18:36,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:36,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-28 23:18:36,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:18:36,646 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 23:18:37,104 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-10-28 23:18:37,104 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 2 case distinctions, treesize of input 20 treesize of output 19 [2021-10-28 23:18:37,136 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 23:18:37,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298953556] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:18:37,136 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:18:37,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-10-28 23:18:37,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503758150] [2021-10-28 23:18:37,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-28 23:18:37,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:18:37,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-28 23:18:37,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-10-28 23:18:37,143 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand has 18 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 14 states have internal predecessors, (53), 5 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-10-28 23:18:37,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:18:37,995 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2021-10-28 23:18:37,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 23:18:37,996 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 14 states have internal predecessors, (53), 5 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 43 [2021-10-28 23:18:37,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:18:37,998 INFO L225 Difference]: With dead ends: 94 [2021-10-28 23:18:37,998 INFO L226 Difference]: Without dead ends: 94 [2021-10-28 23:18:37,999 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2021-10-28 23:18:37,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-10-28 23:18:38,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 79. [2021-10-28 23:18:38,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 65 states have internal predecessors, (69), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-10-28 23:18:38,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 85 transitions. [2021-10-28 23:18:38,004 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 85 transitions. Word has length 43 [2021-10-28 23:18:38,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:18:38,005 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 85 transitions. [2021-10-28 23:18:38,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 14 states have internal predecessors, (53), 5 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-10-28 23:18:38,005 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 85 transitions. [2021-10-28 23:18:38,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-28 23:18:38,006 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:18:38,006 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] [2021-10-28 23:18:38,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 23:18:38,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-10-28 23:18:38,207 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting sll_remove_firstErr1REQUIRES_VIOLATION === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-10-28 23:18:38,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:18:38,208 INFO L85 PathProgramCache]: Analyzing trace with hash 836136052, now seen corresponding path program 1 times [2021-10-28 23:18:38,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:18:38,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959282939] [2021-10-28 23:18:38,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:18:38,208 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:18:38,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:38,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:18:38,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:38,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 23:18:38,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:38,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:18:38,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:38,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-10-28 23:18:38,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:38,696 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-28 23:18:38,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:18:38,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959282939] [2021-10-28 23:18:38,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959282939] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:18:38,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922441600] [2021-10-28 23:18:38,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:18:38,697 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:18:38,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:18:38,698 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:18:38,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 23:18:38,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:38,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-28 23:18:38,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:18:38,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 23:18:38,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-10-28 23:18:39,458 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-10-28 23:18:39,458 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 2 case distinctions, treesize of input 25 treesize of output 29 [2021-10-28 23:18:39,634 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-28 23:18:39,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922441600] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:18:39,634 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:18:39,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2021-10-28 23:18:39,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644268829] [2021-10-28 23:18:39,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-28 23:18:39,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:18:39,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-28 23:18:39,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-10-28 23:18:39,637 INFO L87 Difference]: Start difference. First operand 79 states and 85 transitions. Second operand has 19 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 8 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-10-28 23:18:40,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:18:40,434 INFO L93 Difference]: Finished difference Result 107 states and 114 transitions. [2021-10-28 23:18:40,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-28 23:18:40,435 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 8 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 43 [2021-10-28 23:18:40,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:18:40,436 INFO L225 Difference]: With dead ends: 107 [2021-10-28 23:18:40,436 INFO L226 Difference]: Without dead ends: 107 [2021-10-28 23:18:40,437 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2021-10-28 23:18:40,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-10-28 23:18:40,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 94. [2021-10-28 23:18:40,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 65 states have (on average 1.3846153846153846) internal successors, (90), 78 states have internal predecessors, (90), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2021-10-28 23:18:40,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 108 transitions. [2021-10-28 23:18:40,443 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 108 transitions. Word has length 43 [2021-10-28 23:18:40,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:18:40,444 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 108 transitions. [2021-10-28 23:18:40,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 8 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-10-28 23:18:40,444 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 108 transitions. [2021-10-28 23:18:40,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-10-28 23:18:40,446 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:18:40,446 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] [2021-10-28 23:18:40,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 23:18:40,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-10-28 23:18:40,647 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting sll_remove_firstErr2REQUIRES_VIOLATION === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-10-28 23:18:40,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:18:40,647 INFO L85 PathProgramCache]: Analyzing trace with hash 150413864, now seen corresponding path program 1 times [2021-10-28 23:18:40,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:18:40,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604523587] [2021-10-28 23:18:40,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:18:40,648 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:18:40,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:40,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:18:40,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:40,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 23:18:40,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:40,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:18:40,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:40,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-10-28 23:18:40,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:40,909 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-28 23:18:40,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:18:40,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604523587] [2021-10-28 23:18:40,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604523587] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:18:40,913 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:18:40,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-10-28 23:18:40,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987665265] [2021-10-28 23:18:40,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-28 23:18:40,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:18:40,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 23:18:40,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-10-28 23:18:40,915 INFO L87 Difference]: Start difference. First operand 94 states and 108 transitions. Second operand has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 10 states have internal predecessors, (31), 2 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 23:18:41,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:18:41,430 INFO L93 Difference]: Finished difference Result 116 states and 135 transitions. [2021-10-28 23:18:41,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 23:18:41,430 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 10 states have internal predecessors, (31), 2 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 44 [2021-10-28 23:18:41,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:18:41,432 INFO L225 Difference]: With dead ends: 116 [2021-10-28 23:18:41,432 INFO L226 Difference]: Without dead ends: 116 [2021-10-28 23:18:41,432 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-10-28 23:18:41,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-10-28 23:18:41,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 99. [2021-10-28 23:18:41,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 69 states have (on average 1.4202898550724639) internal successors, (98), 82 states have internal predecessors, (98), 10 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2021-10-28 23:18:41,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 118 transitions. [2021-10-28 23:18:41,438 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 118 transitions. Word has length 44 [2021-10-28 23:18:41,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:18:41,439 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 118 transitions. [2021-10-28 23:18:41,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 10 states have internal predecessors, (31), 2 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 23:18:41,439 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 118 transitions. [2021-10-28 23:18:41,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-10-28 23:18:41,440 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:18:41,441 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] [2021-10-28 23:18:41,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-28 23:18:41,441 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting sll_remove_firstErr3REQUIRES_VIOLATION === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-10-28 23:18:41,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:18:41,441 INFO L85 PathProgramCache]: Analyzing trace with hash 150413865, now seen corresponding path program 1 times [2021-10-28 23:18:41,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:18:41,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039575083] [2021-10-28 23:18:41,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:18:41,442 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:18:41,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:41,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:18:41,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:41,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 23:18:41,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:41,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:18:41,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:41,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-10-28 23:18:41,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:41,732 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-28 23:18:41,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:18:41,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039575083] [2021-10-28 23:18:41,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039575083] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:18:41,733 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:18:41,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-10-28 23:18:41,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723545887] [2021-10-28 23:18:41,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-28 23:18:41,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:18:41,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 23:18:41,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-10-28 23:18:41,735 INFO L87 Difference]: Start difference. First operand 99 states and 118 transitions. Second operand has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 10 states have internal predecessors, (33), 2 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 23:18:42,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:18:42,288 INFO L93 Difference]: Finished difference Result 119 states and 138 transitions. [2021-10-28 23:18:42,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 23:18:42,288 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 10 states have internal predecessors, (33), 2 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 44 [2021-10-28 23:18:42,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:18:42,290 INFO L225 Difference]: With dead ends: 119 [2021-10-28 23:18:42,290 INFO L226 Difference]: Without dead ends: 119 [2021-10-28 23:18:42,290 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-10-28 23:18:42,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-10-28 23:18:42,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 99. [2021-10-28 23:18:42,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 69 states have (on average 1.391304347826087) internal successors, (96), 82 states have internal predecessors, (96), 10 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2021-10-28 23:18:42,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 116 transitions. [2021-10-28 23:18:42,297 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 116 transitions. Word has length 44 [2021-10-28 23:18:42,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:18:42,297 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 116 transitions. [2021-10-28 23:18:42,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 10 states have internal predecessors, (33), 2 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 23:18:42,298 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 116 transitions. [2021-10-28 23:18:42,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-28 23:18:42,299 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:18:42,299 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] [2021-10-28 23:18:42,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-28 23:18:42,299 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting sll_remove_firstErr6ASSERT_VIOLATIONMEMORY_FREE === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-10-28 23:18:42,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:18:42,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1328594296, now seen corresponding path program 1 times [2021-10-28 23:18:42,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:18:42,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358182792] [2021-10-28 23:18:42,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:18:42,301 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:18:42,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:42,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:18:42,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:42,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 23:18:42,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:42,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:18:42,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:42,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-10-28 23:18:42,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:42,485 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-28 23:18:42,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:18:42,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358182792] [2021-10-28 23:18:42,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358182792] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:18:42,486 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:18:42,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-10-28 23:18:42,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537971295] [2021-10-28 23:18:42,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-28 23:18:42,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:18:42,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 23:18:42,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-10-28 23:18:42,488 INFO L87 Difference]: Start difference. First operand 99 states and 116 transitions. Second operand has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 23:18:43,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:18:43,006 INFO L93 Difference]: Finished difference Result 118 states and 136 transitions. [2021-10-28 23:18:43,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-28 23:18:43,007 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 47 [2021-10-28 23:18:43,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:18:43,008 INFO L225 Difference]: With dead ends: 118 [2021-10-28 23:18:43,008 INFO L226 Difference]: Without dead ends: 118 [2021-10-28 23:18:43,009 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-10-28 23:18:43,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-10-28 23:18:43,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 105. [2021-10-28 23:18:43,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 75 states have (on average 1.3733333333333333) internal successors, (103), 88 states have internal predecessors, (103), 10 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2021-10-28 23:18:43,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 123 transitions. [2021-10-28 23:18:43,014 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 123 transitions. Word has length 47 [2021-10-28 23:18:43,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:18:43,015 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 123 transitions. [2021-10-28 23:18:43,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 23:18:43,015 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 123 transitions. [2021-10-28 23:18:43,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-10-28 23:18:43,016 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:18:43,016 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] [2021-10-28 23:18:43,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-28 23:18:43,016 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting sll_remove_firstErr7ASSERT_VIOLATIONMEMORY_FREE === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-10-28 23:18:43,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:18:43,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1763249655, now seen corresponding path program 1 times [2021-10-28 23:18:43,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:18:43,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399706184] [2021-10-28 23:18:43,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:18:43,017 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:18:43,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:43,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:18:43,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:43,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 23:18:43,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:43,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:18:43,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:43,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-10-28 23:18:43,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:43,239 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-28 23:18:43,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:18:43,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399706184] [2021-10-28 23:18:43,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399706184] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:18:43,240 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:18:43,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-10-28 23:18:43,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334611194] [2021-10-28 23:18:43,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-28 23:18:43,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:18:43,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 23:18:43,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-10-28 23:18:43,242 INFO L87 Difference]: Start difference. First operand 105 states and 123 transitions. Second operand has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 10 states have internal predecessors, (37), 2 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 23:18:43,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:18:43,803 INFO L93 Difference]: Finished difference Result 117 states and 134 transitions. [2021-10-28 23:18:43,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-28 23:18:43,804 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 10 states have internal predecessors, (37), 2 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 48 [2021-10-28 23:18:43,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:18:43,805 INFO L225 Difference]: With dead ends: 117 [2021-10-28 23:18:43,805 INFO L226 Difference]: Without dead ends: 117 [2021-10-28 23:18:43,806 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-10-28 23:18:43,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-10-28 23:18:43,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 107. [2021-10-28 23:18:43,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 77 states have (on average 1.3636363636363635) internal successors, (105), 90 states have internal predecessors, (105), 10 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2021-10-28 23:18:43,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 125 transitions. [2021-10-28 23:18:43,811 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 125 transitions. Word has length 48 [2021-10-28 23:18:43,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:18:43,811 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 125 transitions. [2021-10-28 23:18:43,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 10 states have internal predecessors, (37), 2 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 23:18:43,812 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 125 transitions. [2021-10-28 23:18:43,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-10-28 23:18:43,813 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:18:43,813 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] [2021-10-28 23:18:43,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-28 23:18:43,813 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting sll_remove_firstErr8ASSERT_VIOLATIONMEMORY_FREE === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-10-28 23:18:43,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:18:43,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1173835674, now seen corresponding path program 1 times [2021-10-28 23:18:43,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:18:43,814 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659841566] [2021-10-28 23:18:43,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:18:43,814 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:18:43,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:43,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:18:43,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:43,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 23:18:43,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:43,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:18:43,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:43,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-10-28 23:18:43,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:43,925 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-28 23:18:43,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:18:43,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659841566] [2021-10-28 23:18:43,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659841566] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:18:43,926 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:18:43,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 23:18:43,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007909182] [2021-10-28 23:18:43,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 23:18:43,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:18:43,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 23:18:43,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:18:43,928 INFO L87 Difference]: Start difference. First operand 107 states and 125 transitions. Second operand has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 23:18:44,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:18:44,152 INFO L93 Difference]: Finished difference Result 106 states and 123 transitions. [2021-10-28 23:18:44,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 23:18:44,153 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2021-10-28 23:18:44,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:18:44,154 INFO L225 Difference]: With dead ends: 106 [2021-10-28 23:18:44,154 INFO L226 Difference]: Without dead ends: 106 [2021-10-28 23:18:44,154 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-10-28 23:18:44,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-10-28 23:18:44,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2021-10-28 23:18:44,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 77 states have (on average 1.3376623376623376) internal successors, (103), 89 states have internal predecessors, (103), 10 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2021-10-28 23:18:44,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 123 transitions. [2021-10-28 23:18:44,159 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 123 transitions. Word has length 49 [2021-10-28 23:18:44,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:18:44,160 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 123 transitions. [2021-10-28 23:18:44,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 23:18:44,160 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 123 transitions. [2021-10-28 23:18:44,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-10-28 23:18:44,161 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:18:44,161 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] [2021-10-28 23:18:44,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-28 23:18:44,162 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting sll_remove_firstErr9REQUIRES_VIOLATION === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-10-28 23:18:44,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:18:44,162 INFO L85 PathProgramCache]: Analyzing trace with hash 2029167660, now seen corresponding path program 1 times [2021-10-28 23:18:44,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:18:44,163 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486578320] [2021-10-28 23:18:44,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:18:44,163 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:18:44,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:44,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:18:44,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:44,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 23:18:44,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:44,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:18:44,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:44,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-10-28 23:18:44,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:44,573 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 23:18:44,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:18:44,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486578320] [2021-10-28 23:18:44,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486578320] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:18:44,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534700147] [2021-10-28 23:18:44,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:18:44,574 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:18:44,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:18:44,579 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:18:44,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 23:18:44,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:44,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-28 23:18:44,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:18:45,038 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-28 23:18:45,039 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 17 treesize of output 19 [2021-10-28 23:18:45,083 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-28 23:18:45,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534700147] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:18:45,084 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:18:45,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [21] total 27 [2021-10-28 23:18:45,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810866095] [2021-10-28 23:18:45,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 23:18:45,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:18:45,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 23:18:45,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=687, Unknown=0, NotChecked=0, Total=756 [2021-10-28 23:18:45,086 INFO L87 Difference]: Start difference. First operand 106 states and 123 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-28 23:18:45,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:18:45,259 INFO L93 Difference]: Finished difference Result 105 states and 121 transitions. [2021-10-28 23:18:45,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 23:18:45,259 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 50 [2021-10-28 23:18:45,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:18:45,261 INFO L225 Difference]: With dead ends: 105 [2021-10-28 23:18:45,261 INFO L226 Difference]: Without dead ends: 105 [2021-10-28 23:18:45,264 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2021-10-28 23:18:45,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-10-28 23:18:45,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2021-10-28 23:18:45,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 77 states have (on average 1.3116883116883118) internal successors, (101), 88 states have internal predecessors, (101), 10 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2021-10-28 23:18:45,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 121 transitions. [2021-10-28 23:18:45,272 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 121 transitions. Word has length 50 [2021-10-28 23:18:45,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:18:45,273 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 121 transitions. [2021-10-28 23:18:45,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-28 23:18:45,273 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 121 transitions. [2021-10-28 23:18:45,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-10-28 23:18:45,274 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:18:45,274 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, 1] [2021-10-28 23:18:45,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 23:18:45,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-28 23:18:45,488 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0REQUIRES_VIOLATION === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-10-28 23:18:45,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:18:45,488 INFO L85 PathProgramCache]: Analyzing trace with hash 2020712695, now seen corresponding path program 1 times [2021-10-28 23:18:45,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:18:45,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34122972] [2021-10-28 23:18:45,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:18:45,489 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:18:45,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:45,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:18:45,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:45,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 23:18:45,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:45,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:18:45,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:45,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-10-28 23:18:45,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:45,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-10-28 23:18:45,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:45,599 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-28 23:18:45,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:18:45,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34122972] [2021-10-28 23:18:45,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34122972] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:18:45,600 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:18:45,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 23:18:45,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156030206] [2021-10-28 23:18:45,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 23:18:45,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:18:45,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 23:18:45,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:18:45,602 INFO L87 Difference]: Start difference. First operand 105 states and 121 transitions. Second operand has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 23:18:45,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:18:45,838 INFO L93 Difference]: Finished difference Result 105 states and 117 transitions. [2021-10-28 23:18:45,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 23:18:45,838 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 55 [2021-10-28 23:18:45,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:18:45,839 INFO L225 Difference]: With dead ends: 105 [2021-10-28 23:18:45,839 INFO L226 Difference]: Without dead ends: 105 [2021-10-28 23:18:45,839 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-10-28 23:18:45,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-10-28 23:18:45,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2021-10-28 23:18:45,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 77 states have (on average 1.2597402597402598) internal successors, (97), 87 states have internal predecessors, (97), 10 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2021-10-28 23:18:45,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 117 transitions. [2021-10-28 23:18:45,844 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 117 transitions. Word has length 55 [2021-10-28 23:18:45,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:18:45,844 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 117 transitions. [2021-10-28 23:18:45,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 23:18:45,845 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 117 transitions. [2021-10-28 23:18:45,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-10-28 23:18:45,845 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:18:45,845 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:18:45,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-28 23:18:45,845 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting sll_remove_firstErr0REQUIRES_VIOLATION === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-10-28 23:18:45,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:18:45,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1148883491, now seen corresponding path program 2 times [2021-10-28 23:18:45,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:18:45,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044488031] [2021-10-28 23:18:45,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:18:45,846 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:18:45,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:45,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:18:45,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:45,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 23:18:45,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:45,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:18:45,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:45,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-10-28 23:18:45,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:45,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-10-28 23:18:45,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:45,976 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-28 23:18:45,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:18:45,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044488031] [2021-10-28 23:18:45,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044488031] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:18:45,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439273168] [2021-10-28 23:18:45,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:18:45,978 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:18:45,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:18:45,983 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:18:45,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 23:18:46,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:18:46,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:18:46,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 23:18:46,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:18:46,412 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-28 23:18:46,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439273168] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:18:46,413 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:18:46,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 11 [2021-10-28 23:18:46,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413159294] [2021-10-28 23:18:46,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 23:18:46,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:18:46,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 23:18:46,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-10-28 23:18:46,415 INFO L87 Difference]: Start difference. First operand 104 states and 117 transitions. Second operand has 11 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 8 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-10-28 23:18:46,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:18:46,617 INFO L93 Difference]: Finished difference Result 74 states and 78 transitions. [2021-10-28 23:18:46,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 23:18:46,617 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 8 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) Word has length 56 [2021-10-28 23:18:46,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:18:46,618 INFO L225 Difference]: With dead ends: 74 [2021-10-28 23:18:46,618 INFO L226 Difference]: Without dead ends: 65 [2021-10-28 23:18:46,619 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-10-28 23:18:46,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-10-28 23:18:46,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-10-28 23:18:46,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 48 states have (on average 1.125) internal successors, (54), 53 states have internal predecessors, (54), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-10-28 23:18:46,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2021-10-28 23:18:46,622 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 56 [2021-10-28 23:18:46,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:18:46,622 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2021-10-28 23:18:46,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 8 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-10-28 23:18:46,622 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2021-10-28 23:18:46,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-10-28 23:18:46,623 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:18:46,623 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] [2021-10-28 23:18:46,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-28 23:18:46,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:18:46,832 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting sll_remove_firstErr2REQUIRES_VIOLATION === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-10-28 23:18:46,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:18:46,832 INFO L85 PathProgramCache]: Analyzing trace with hash 793488505, now seen corresponding path program 1 times [2021-10-28 23:18:46,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:18:46,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017602559] [2021-10-28 23:18:46,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:18:46,833 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:18:46,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:46,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:18:46,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:46,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 23:18:46,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:47,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:18:47,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:47,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-10-28 23:18:47,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:47,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-10-28 23:18:47,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:47,858 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 23:18:47,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:18:47,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017602559] [2021-10-28 23:18:47,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017602559] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:18:47,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426317359] [2021-10-28 23:18:47,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:18:47,859 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:18:47,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:18:47,860 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:18:47,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-28 23:18:48,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:48,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 82 conjunts are in the unsatisfiable core [2021-10-28 23:18:48,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:18:48,155 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 23:18:48,398 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-28 23:18:48,399 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 23:18:48,516 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 21 treesize of output 17 [2021-10-28 23:18:49,188 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 17 [2021-10-28 23:18:49,495 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 23:18:49,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 38 [2021-10-28 23:18:49,508 INFO L354 Elim1Store]: treesize reduction 39, result has 18.8 percent of original size [2021-10-28 23:18:49,508 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 40 treesize of output 40 [2021-10-28 23:18:49,809 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 23:18:49,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-10-28 23:18:49,872 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:18:49,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426317359] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:18:49,873 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:18:49,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 52 [2021-10-28 23:18:49,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128574080] [2021-10-28 23:18:49,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-10-28 23:18:49,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:18:49,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-10-28 23:18:49,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2594, Unknown=0, NotChecked=0, Total=2756 [2021-10-28 23:18:49,876 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand has 53 states, 51 states have (on average 1.588235294117647) internal successors, (81), 41 states have internal predecessors, (81), 7 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2021-10-28 23:18:52,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:18:52,294 INFO L93 Difference]: Finished difference Result 83 states and 87 transitions. [2021-10-28 23:18:52,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-28 23:18:52,295 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 51 states have (on average 1.588235294117647) internal successors, (81), 41 states have internal predecessors, (81), 7 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) Word has length 58 [2021-10-28 23:18:52,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:18:52,296 INFO L225 Difference]: With dead ends: 83 [2021-10-28 23:18:52,296 INFO L226 Difference]: Without dead ends: 83 [2021-10-28 23:18:52,299 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 999 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=514, Invalid=5186, Unknown=0, NotChecked=0, Total=5700 [2021-10-28 23:18:52,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-10-28 23:18:52,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 71. [2021-10-28 23:18:52,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 53 states have (on average 1.150943396226415) internal successors, (61), 57 states have internal predecessors, (61), 8 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-10-28 23:18:52,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 76 transitions. [2021-10-28 23:18:52,304 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 76 transitions. Word has length 58 [2021-10-28 23:18:52,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:18:52,305 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 76 transitions. [2021-10-28 23:18:52,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 51 states have (on average 1.588235294117647) internal successors, (81), 41 states have internal predecessors, (81), 7 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2021-10-28 23:18:52,305 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 76 transitions. [2021-10-28 23:18:52,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-10-28 23:18:52,306 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:18:52,306 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] [2021-10-28 23:18:52,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-28 23:18:52,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-28 23:18:52,527 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting sll_remove_firstErr3REQUIRES_VIOLATION === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-10-28 23:18:52,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:18:52,528 INFO L85 PathProgramCache]: Analyzing trace with hash 793488506, now seen corresponding path program 1 times [2021-10-28 23:18:52,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:18:52,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990488443] [2021-10-28 23:18:52,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:18:52,528 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:18:52,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:52,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:18:52,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:52,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 23:18:52,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:52,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:18:52,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:52,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-10-28 23:18:52,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:53,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-10-28 23:18:53,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:53,481 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 23:18:53,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:18:53,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990488443] [2021-10-28 23:18:53,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990488443] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:18:53,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515963949] [2021-10-28 23:18:53,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:18:53,482 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:18:53,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:18:53,483 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:18:53,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-28 23:18:53,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:18:53,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 92 conjunts are in the unsatisfiable core [2021-10-28 23:18:53,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:18:53,849 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 23:18:54,371 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-10-28 23:18:54,371 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 21 treesize of output 14 [2021-10-28 23:18:54,525 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 20 treesize of output 16 [2021-10-28 23:18:54,532 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 17 treesize of output 13 [2021-10-28 23:18:54,957 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 23:18:54,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 30 [2021-10-28 23:18:54,962 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 27 treesize of output 19 [2021-10-28 23:18:55,874 INFO L354 Elim1Store]: treesize reduction 85, result has 3.4 percent of original size [2021-10-28 23:18:55,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 104 treesize of output 75 [2021-10-28 23:18:55,891 INFO L354 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2021-10-28 23:18:55,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 70 treesize of output 63 [2021-10-28 23:18:56,330 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 23:18:56,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 47 [2021-10-28 23:18:56,358 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 23:18:56,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 25 [2021-10-28 23:18:56,436 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:18:56,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515963949] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:18:56,436 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:18:56,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 31] total 58 [2021-10-28 23:18:56,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090920224] [2021-10-28 23:18:56,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-10-28 23:18:56,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:18:56,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-10-28 23:18:56,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=3243, Unknown=0, NotChecked=0, Total=3422 [2021-10-28 23:18:56,439 INFO L87 Difference]: Start difference. First operand 71 states and 76 transitions. Second operand has 59 states, 57 states have (on average 1.5263157894736843) internal successors, (87), 46 states have internal predecessors, (87), 8 states have call successors, (13), 8 states have call predecessors, (13), 9 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2021-10-28 23:19:00,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:19:00,362 INFO L93 Difference]: Finished difference Result 87 states and 90 transitions. [2021-10-28 23:19:00,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-10-28 23:19:00,363 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 57 states have (on average 1.5263157894736843) internal successors, (87), 46 states have internal predecessors, (87), 8 states have call successors, (13), 8 states have call predecessors, (13), 9 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) Word has length 58 [2021-10-28 23:19:00,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:19:00,364 INFO L225 Difference]: With dead ends: 87 [2021-10-28 23:19:00,364 INFO L226 Difference]: Without dead ends: 87 [2021-10-28 23:19:00,367 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1684 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=666, Invalid=8076, Unknown=0, NotChecked=0, Total=8742 [2021-10-28 23:19:00,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-10-28 23:19:00,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 79. [2021-10-28 23:19:00,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 60 states have (on average 1.1333333333333333) internal successors, (68), 65 states have internal predecessors, (68), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-10-28 23:19:00,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2021-10-28 23:19:00,371 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 58 [2021-10-28 23:19:00,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:19:00,371 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2021-10-28 23:19:00,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 57 states have (on average 1.5263157894736843) internal successors, (87), 46 states have internal predecessors, (87), 8 states have call successors, (13), 8 states have call predecessors, (13), 9 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2021-10-28 23:19:00,372 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2021-10-28 23:19:00,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-10-28 23:19:00,373 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:19:00,373 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, 1, 1, 1] [2021-10-28 23:19:00,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-28 23:19:00,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:19:00,574 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr2ASSERT_VIOLATIONMEMORY_LEAK === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-10-28 23:19:00,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:19:00,574 INFO L85 PathProgramCache]: Analyzing trace with hash 579683577, now seen corresponding path program 1 times [2021-10-28 23:19:00,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:19:00,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783277784] [2021-10-28 23:19:00,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:19:00,575 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:19:00,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:19:00,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:19:00,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:19:00,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 23:19:00,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:19:00,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:19:00,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:19:00,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-10-28 23:19:00,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:19:00,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-10-28 23:19:00,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:19:00,696 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-28 23:19:00,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:19:00,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783277784] [2021-10-28 23:19:00,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783277784] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:19:00,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940095964] [2021-10-28 23:19:00,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:19:00,697 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:19:00,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:19:00,698 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:19:00,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-28 23:19:01,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:19:01,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 23:19:01,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:19:01,158 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-28 23:19:01,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940095964] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:19:01,158 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:19:01,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 9 [2021-10-28 23:19:01,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991731350] [2021-10-28 23:19:01,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 23:19:01,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:19:01,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 23:19:01,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:19:01,160 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 6 states have internal predecessors, (41), 4 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-28 23:19:01,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:19:01,281 INFO L93 Difference]: Finished difference Result 79 states and 82 transitions. [2021-10-28 23:19:01,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 23:19:01,282 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 6 states have internal predecessors, (41), 4 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 57 [2021-10-28 23:19:01,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:19:01,282 INFO L225 Difference]: With dead ends: 79 [2021-10-28 23:19:01,282 INFO L226 Difference]: Without dead ends: 79 [2021-10-28 23:19:01,283 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-10-28 23:19:01,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-10-28 23:19:01,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-10-28 23:19:01,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 60 states have (on average 1.1166666666666667) internal successors, (67), 65 states have internal predecessors, (67), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-10-28 23:19:01,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2021-10-28 23:19:01,286 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 57 [2021-10-28 23:19:01,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:19:01,286 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2021-10-28 23:19:01,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 6 states have internal predecessors, (41), 4 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-28 23:19:01,287 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2021-10-28 23:19:01,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-10-28 23:19:01,288 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:19:01,288 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:19:01,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-28 23:19:01,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:19:01,503 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting sll_remove_firstErr7ASSERT_VIOLATIONMEMORY_FREE === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-10-28 23:19:01,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:19:01,503 INFO L85 PathProgramCache]: Analyzing trace with hash 274459610, now seen corresponding path program 1 times [2021-10-28 23:19:01,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:19:01,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494707297] [2021-10-28 23:19:01,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:19:01,504 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:19:01,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:19:01,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:19:01,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:19:01,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 23:19:01,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:19:01,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:19:01,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:19:01,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-10-28 23:19:01,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:19:01,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-10-28 23:19:01,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:19:02,227 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 23:19:02,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:19:02,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494707297] [2021-10-28 23:19:02,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494707297] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:19:02,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374353717] [2021-10-28 23:19:02,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:19:02,228 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:19:02,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:19:02,229 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:19:02,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-28 23:19:02,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:19:02,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 61 conjunts are in the unsatisfiable core [2021-10-28 23:19:02,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:19:02,719 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 17 treesize of output 13 [2021-10-28 23:19:02,863 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 23:19:02,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 9 [2021-10-28 23:19:03,078 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 17 [2021-10-28 23:19:04,031 WARN L860 $PredicateComparison]: unable to prove that (exists ((sll_remove_first_~temp~1.base Int)) (let ((.cse0 (select |c_old(#memory_$Pointer$.base)| |c_sll_remove_first_#in~head.base|))) (and (<= sll_remove_first_~temp~1.base (select (select |c_old(#memory_$Pointer$.base)| (select .cse0 |c_sll_remove_first_#in~head.offset|)) 4)) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_sll_remove_first_#in~head.base| (store .cse0 |c_sll_remove_first_#in~head.offset| sll_remove_first_~temp~1.base)))))) is different from true [2021-10-28 23:19:04,052 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 23:19:04,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-10-28 23:19:04,311 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 23:19:04,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 12 [2021-10-28 23:19:04,317 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 23:19:04,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374353717] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:19:04,318 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:19:04,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 43 [2021-10-28 23:19:04,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874657603] [2021-10-28 23:19:04,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-10-28 23:19:04,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:19:04,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-10-28 23:19:04,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1693, Unknown=1, NotChecked=82, Total=1892 [2021-10-28 23:19:04,321 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand has 44 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 34 states have internal predecessors, (76), 7 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2021-10-28 23:19:08,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:19:08,207 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2021-10-28 23:19:08,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-28 23:19:08,208 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 34 states have internal predecessors, (76), 7 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) Word has length 62 [2021-10-28 23:19:08,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:19:08,209 INFO L225 Difference]: With dead ends: 81 [2021-10-28 23:19:08,209 INFO L226 Difference]: Without dead ends: 81 [2021-10-28 23:19:08,210 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=449, Invalid=4523, Unknown=2, NotChecked=138, Total=5112 [2021-10-28 23:19:08,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-28 23:19:08,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 72. [2021-10-28 23:19:08,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 59 states have internal predecessors, (59), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-10-28 23:19:08,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2021-10-28 23:19:08,214 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 62 [2021-10-28 23:19:08,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:19:08,214 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2021-10-28 23:19:08,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 34 states have internal predecessors, (76), 7 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2021-10-28 23:19:08,215 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2021-10-28 23:19:08,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-10-28 23:19:08,216 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:19:08,216 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-10-28 23:19:08,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-28 23:19:08,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-10-28 23:19:08,427 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting sll_remove_firstErr2REQUIRES_VIOLATION === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-10-28 23:19:08,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:19:08,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1750291722, now seen corresponding path program 2 times [2021-10-28 23:19:08,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:19:08,428 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849529344] [2021-10-28 23:19:08,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:19:08,428 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:19:08,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:19:08,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:19:08,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:19:08,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 23:19:08,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:19:08,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:19:08,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:19:08,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-10-28 23:19:08,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:19:08,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-10-28 23:19:08,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:19:08,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-10-28 23:19:08,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:19:08,551 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-10-28 23:19:08,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:19:08,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849529344] [2021-10-28 23:19:08,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849529344] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:19:08,552 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:19:08,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-28 23:19:08,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546525707] [2021-10-28 23:19:08,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 23:19:08,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:19:08,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 23:19:08,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:19:08,554 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 6 states have internal predecessors, (37), 5 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-28 23:19:08,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:19:08,688 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2021-10-28 23:19:08,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 23:19:08,688 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 6 states have internal predecessors, (37), 5 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 72 [2021-10-28 23:19:08,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:19:08,691 INFO L225 Difference]: With dead ends: 56 [2021-10-28 23:19:08,691 INFO L226 Difference]: Without dead ends: 56 [2021-10-28 23:19:08,692 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-10-28 23:19:08,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-10-28 23:19:08,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-10-28 23:19:08,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 44 states have internal predecessors, (44), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-10-28 23:19:08,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2021-10-28 23:19:08,695 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 72 [2021-10-28 23:19:08,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:19:08,695 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2021-10-28 23:19:08,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 6 states have internal predecessors, (37), 5 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-28 23:19:08,696 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2021-10-28 23:19:08,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-10-28 23:19:08,696 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:19:08,697 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:19:08,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-10-28 23:19:08,697 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr2ASSERT_VIOLATIONMEMORY_LEAK === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-10-28 23:19:08,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:19:08,698 INFO L85 PathProgramCache]: Analyzing trace with hash -359283128, now seen corresponding path program 2 times [2021-10-28 23:19:08,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:19:08,698 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324506245] [2021-10-28 23:19:08,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:19:08,698 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:19:08,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:19:08,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:19:08,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:19:08,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 23:19:08,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:19:09,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:19:09,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:19:10,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-10-28 23:19:10,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:19:10,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-10-28 23:19:10,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:19:11,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-10-28 23:19:11,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:19:12,068 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-28 23:19:12,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:19:12,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324506245] [2021-10-28 23:19:12,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324506245] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:19:12,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683097917] [2021-10-28 23:19:12,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:19:12,069 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:19:12,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:19:12,071 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:19:12,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-28 23:19:12,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:19:12,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:19:12,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 139 conjunts are in the unsatisfiable core [2021-10-28 23:19:12,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:19:12,553 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-10-28 23:19:12,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 21 treesize of output 24 [2021-10-28 23:19:12,677 INFO L354 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2021-10-28 23:19:12,678 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 17 treesize of output 30 [2021-10-28 23:19:13,074 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 13 treesize of output 9 [2021-10-28 23:19:13,079 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 13 treesize of output 9 [2021-10-28 23:19:13,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-10-28 23:19:13,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-10-28 23:19:13,601 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-10-28 23:19:13,602 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 1 case distinctions, treesize of input 41 treesize of output 40 [2021-10-28 23:19:13,614 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-10-28 23:19:13,615 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 1 case distinctions, treesize of input 37 treesize of output 36 [2021-10-28 23:19:14,567 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-28 23:19:14,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2021-10-28 23:19:14,585 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-28 23:19:14,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2021-10-28 23:19:14,836 INFO L354 Elim1Store]: treesize reduction 48, result has 32.4 percent of original size [2021-10-28 23:19:14,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 78 [2021-10-28 23:19:14,866 INFO L354 Elim1Store]: treesize reduction 66, result has 34.7 percent of original size [2021-10-28 23:19:14,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 109 [2021-10-28 23:19:16,554 INFO L354 Elim1Store]: treesize reduction 166, result has 14.0 percent of original size [2021-10-28 23:19:16,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 117 treesize of output 127 [2021-10-28 23:19:19,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 23:19:19,503 INFO L354 Elim1Store]: treesize reduction 170, result has 17.9 percent of original size [2021-10-28 23:19:19,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 214 treesize of output 156 [2021-10-28 23:19:19,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 23:19:19,517 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-28 23:19:19,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 145 treesize of output 143 [2021-10-28 23:19:19,561 INFO L354 Elim1Store]: treesize reduction 82, result has 22.6 percent of original size [2021-10-28 23:19:19,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 127 treesize of output 141 [2021-10-28 23:19:24,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 23:19:24,856 INFO L354 Elim1Store]: treesize reduction 198, result has 7.9 percent of original size [2021-10-28 23:19:24,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 206 treesize of output 166 [2021-10-28 23:19:24,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 23:19:24,890 INFO L354 Elim1Store]: treesize reduction 89, result has 11.0 percent of original size [2021-10-28 23:19:24,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 181 treesize of output 177 [2021-10-28 23:19:24,916 INFO L354 Elim1Store]: treesize reduction 40, result has 34.4 percent of original size [2021-10-28 23:19:24,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 159 treesize of output 159 [2021-10-28 23:19:25,208 INFO L354 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2021-10-28 23:19:25,209 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 97 treesize of output 64 [2021-10-28 23:19:25,216 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 23:19:25,216 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 43 treesize of output 27 [2021-10-28 23:19:25,225 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-28 23:19:25,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683097917] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:19:25,225 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:19:25,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 43] total 80 [2021-10-28 23:19:25,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459307770] [2021-10-28 23:19:25,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-10-28 23:19:25,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:19:25,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-10-28 23:19:25,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=6046, Unknown=0, NotChecked=0, Total=6320 [2021-10-28 23:19:25,230 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 80 states, 78 states have (on average 1.4230769230769231) internal successors, (111), 69 states have internal predecessors, (111), 12 states have call successors, (14), 7 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 11 states have call successors, (12) [2021-10-28 23:19:31,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:19:31,173 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2021-10-28 23:19:31,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-28 23:19:31,174 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 78 states have (on average 1.4230769230769231) internal successors, (111), 69 states have internal predecessors, (111), 12 states have call successors, (14), 7 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 11 states have call successors, (12) Word has length 71 [2021-10-28 23:19:31,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:19:31,175 INFO L225 Difference]: With dead ends: 54 [2021-10-28 23:19:31,175 INFO L226 Difference]: Without dead ends: 54 [2021-10-28 23:19:31,179 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1693 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=559, Invalid=10783, Unknown=0, NotChecked=0, Total=11342 [2021-10-28 23:19:31,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-10-28 23:19:31,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-10-28 23:19:31,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 42 states have (on average 1.0) internal successors, (42), 42 states have internal predecessors, (42), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-10-28 23:19:31,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2021-10-28 23:19:31,182 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 71 [2021-10-28 23:19:31,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:19:31,182 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2021-10-28 23:19:31,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 78 states have (on average 1.4230769230769231) internal successors, (111), 69 states have internal predecessors, (111), 12 states have call successors, (14), 7 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 11 states have call successors, (12) [2021-10-28 23:19:31,183 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2021-10-28 23:19:31,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-10-28 23:19:31,183 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:19:31,184 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:19:31,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-28 23:19:31,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-28 23:19:31,384 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr3ENSURES_VIOLATIONMEMORY_LEAK === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-10-28 23:19:31,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:19:31,384 INFO L85 PathProgramCache]: Analyzing trace with hash -359283063, now seen corresponding path program 1 times [2021-10-28 23:19:31,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:19:31,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457534487] [2021-10-28 23:19:31,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:19:31,385 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:19:31,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:19:31,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:19:31,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:19:31,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 23:19:31,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:19:32,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:19:32,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:19:32,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-10-28 23:19:32,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:19:32,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-10-28 23:19:32,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:19:32,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-10-28 23:19:32,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:19:33,017 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-28 23:19:33,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:19:33,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457534487] [2021-10-28 23:19:33,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457534487] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:19:33,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605234169] [2021-10-28 23:19:33,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:19:33,018 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:19:33,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:19:33,018 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:19:33,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-28 23:19:33,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:19:33,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 98 conjunts are in the unsatisfiable core [2021-10-28 23:19:33,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:19:34,217 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 34 treesize of output 30 [2021-10-28 23:19:34,969 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 17 [2021-10-28 23:19:35,268 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 23:19:35,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 98 treesize of output 56 [2021-10-28 23:19:35,699 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 23:19:35,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 53 [2021-10-28 23:19:35,966 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-28 23:19:35,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605234169] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:19:35,967 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:19:35,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 61 [2021-10-28 23:19:35,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55584916] [2021-10-28 23:19:35,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-10-28 23:19:35,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:19:35,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-10-28 23:19:35,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=3593, Unknown=0, NotChecked=0, Total=3782 [2021-10-28 23:19:35,970 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 62 states, 59 states have (on average 1.8983050847457628) internal successors, (112), 52 states have internal predecessors, (112), 10 states have call successors, (13), 6 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2021-10-28 23:19:38,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:19:38,250 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2021-10-28 23:19:38,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-28 23:19:38,251 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 59 states have (on average 1.8983050847457628) internal successors, (112), 52 states have internal predecessors, (112), 10 states have call successors, (13), 6 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) Word has length 71 [2021-10-28 23:19:38,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:19:38,252 INFO L225 Difference]: With dead ends: 53 [2021-10-28 23:19:38,252 INFO L226 Difference]: Without dead ends: 0 [2021-10-28 23:19:38,254 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1320 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=354, Invalid=5966, Unknown=0, NotChecked=0, Total=6320 [2021-10-28 23:19:38,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-28 23:19:38,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-28 23:19:38,254 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 23:19:38,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-28 23:19:38,254 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 71 [2021-10-28 23:19:38,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:19:38,254 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 23:19:38,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 59 states have (on average 1.8983050847457628) internal successors, (112), 52 states have internal predecessors, (112), 10 states have call successors, (13), 6 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2021-10-28 23:19:38,255 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-28 23:19:38,255 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-28 23:19:38,257 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_createErr0REQUIRES_VIOLATION [2021-10-28 23:19:38,258 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_createErr1REQUIRES_VIOLATION [2021-10-28 23:19:38,258 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr0REQUIRES_VIOLATION [2021-10-28 23:19:38,260 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr1REQUIRES_VIOLATION [2021-10-28 23:19:38,260 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr2REQUIRES_VIOLATION [2021-10-28 23:19:38,260 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr3REQUIRES_VIOLATION [2021-10-28 23:19:38,260 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0REQUIRES_VIOLATION [2021-10-28 23:19:38,261 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1REQUIRES_VIOLATION [2021-10-28 23:19:38,261 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2ASSERT_VIOLATIONMEMORY_LEAK [2021-10-28 23:19:38,261 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3ENSURES_VIOLATIONMEMORY_LEAK [2021-10-28 23:19:38,261 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_remove_firstErr0REQUIRES_VIOLATION [2021-10-28 23:19:38,261 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_remove_firstErr1REQUIRES_VIOLATION [2021-10-28 23:19:38,262 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_remove_firstErr2REQUIRES_VIOLATION [2021-10-28 23:19:38,262 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_remove_firstErr3REQUIRES_VIOLATION [2021-10-28 23:19:38,262 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_remove_firstErr4REQUIRES_VIOLATION [2021-10-28 23:19:38,262 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_remove_firstErr5REQUIRES_VIOLATION [2021-10-28 23:19:38,262 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_remove_firstErr6ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 23:19:38,263 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_remove_firstErr7ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 23:19:38,263 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_remove_firstErr8ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 23:19:38,263 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_remove_firstErr9REQUIRES_VIOLATION [2021-10-28 23:19:38,263 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_remove_firstErr10REQUIRES_VIOLATION [2021-10-28 23:19:38,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-28 23:19:38,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-28 23:19:38,478 INFO L731 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:19:38,479 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 23:19:38,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 11:19:38 BoogieIcfgContainer [2021-10-28 23:19:38,482 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 23:19:38,482 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 23:19:38,482 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 23:19:38,482 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 23:19:38,483 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:18:32" (3/4) ... [2021-10-28 23:19:38,486 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-28 23:19:38,492 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2021-10-28 23:19:38,493 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-10-28 23:19:38,493 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure myexit [2021-10-28 23:19:38,493 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2021-10-28 23:19:38,493 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2021-10-28 23:19:38,493 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure sll_create [2021-10-28 23:19:38,493 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-10-28 23:19:38,494 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure sll_remove_first [2021-10-28 23:19:38,494 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure node_create [2021-10-28 23:19:38,499 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2021-10-28 23:19:38,499 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-10-28 23:19:38,499 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-28 23:19:38,500 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 23:19:38,536 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/witness.graphml [2021-10-28 23:19:38,536 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 23:19:38,537 INFO L168 Benchmark]: Toolchain (without parser) took 67444.91 ms. Allocated memory was 109.1 MB in the beginning and 339.7 MB in the end (delta: 230.7 MB). Free memory was 68.7 MB in the beginning and 175.7 MB in the end (delta: -107.0 MB). Peak memory consumption was 121.8 MB. Max. memory is 16.1 GB. [2021-10-28 23:19:38,537 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 109.1 MB. Free memory is still 86.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:19:38,538 INFO L168 Benchmark]: CACSL2BoogieTranslator took 528.63 ms. Allocated memory is still 109.1 MB. Free memory was 68.5 MB in the beginning and 75.5 MB in the end (delta: -7.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 23:19:38,538 INFO L168 Benchmark]: Boogie Preprocessor took 80.42 ms. Allocated memory is still 109.1 MB. Free memory was 75.5 MB in the beginning and 72.9 MB in the end (delta: 2.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-28 23:19:38,539 INFO L168 Benchmark]: RCFGBuilder took 660.99 ms. Allocated memory is still 109.1 MB. Free memory was 72.9 MB in the beginning and 51.5 MB in the end (delta: 21.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-10-28 23:19:38,539 INFO L168 Benchmark]: TraceAbstraction took 66114.13 ms. Allocated memory was 109.1 MB in the beginning and 339.7 MB in the end (delta: 230.7 MB). Free memory was 51.1 MB in the beginning and 178.4 MB in the end (delta: -127.2 MB). Peak memory consumption was 105.3 MB. Max. memory is 16.1 GB. [2021-10-28 23:19:38,540 INFO L168 Benchmark]: Witness Printer took 54.01 ms. Allocated memory is still 339.7 MB. Free memory was 178.4 MB in the beginning and 175.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:19:38,542 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 109.1 MB. Free memory is still 86.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 528.63 ms. Allocated memory is still 109.1 MB. Free memory was 68.5 MB in the beginning and 75.5 MB in the end (delta: -7.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 80.42 ms. Allocated memory is still 109.1 MB. Free memory was 75.5 MB in the beginning and 72.9 MB in the end (delta: 2.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 660.99 ms. Allocated memory is still 109.1 MB. Free memory was 72.9 MB in the beginning and 51.5 MB in the end (delta: 21.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 66114.13 ms. Allocated memory was 109.1 MB in the beginning and 339.7 MB in the end (delta: 230.7 MB). Free memory was 51.1 MB in the beginning and 178.4 MB in the end (delta: -127.2 MB). Peak memory consumption was 105.3 MB. Max. memory is 16.1 GB. * Witness Printer took 54.01 ms. Allocated memory is still 339.7 MB. Free memory was 178.4 MB in the beginning and 175.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 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: 587]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 587]: 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: 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: 605]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 605]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 609]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 597]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 593]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 593]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 593]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 593]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 594]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 594]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 594]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 594]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 594]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 595]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 595]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 80 locations, 21 error locations. Started 1 CEGAR loops. OverallTime: 66.0s, OverallIterations: 24, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 24.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 904 SDtfs, 1887 SDslu, 5631 SDs, 0 SdLazy, 14037 SolverSat, 523 SolverUnsat, 13 SolverUnknown, 0 SolverNotchecked, 9.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1300 GetRequests, 600 SyntacticMatches, 13 SemanticMatches, 687 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 6963 ImplicationChecksByTransitivity, 31.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=107occurred in iteration=13, InterpolantAutomatonStates: 354, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 24 MinimizatonAttempts, 144 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 34.3s InterpolantComputationTime, 1673 NumberOfCodeBlocks, 1673 NumberOfCodeBlocksAsserted, 37 NumberOfCheckSat, 1638 ConstructedInterpolants, 114 QuantifiedInterpolants, 21724 SizeOfPredicates, 138 NumberOfNonLiveVariables, 3429 ConjunctsInSsa, 542 ConjunctsInUnsatCore, 35 InterpolantComputations, 14 PerfectInterpolantSequences, 358/605 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 21 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-28 23:19:38,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83f8b3fa-3ab0-4be8-a801-ef5537a99826/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...