./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_51-mutexptr_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b40e50-b33c-482c-ae34-cb65959eb018/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b40e50-b33c-482c-ae34-cb65959eb018/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b40e50-b33c-482c-ae34-cb65959eb018/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b40e50-b33c-482c-ae34-cb65959eb018/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_51-mutexptr_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b40e50-b33c-482c-ae34-cb65959eb018/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b40e50-b33c-482c-ae34-cb65959eb018/bin/uautomizer-uyxdKDjOR8 --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 f222d5749b9bb10b4d4c09b2c40e45ee19dec77732a8593ce917652e8ca8a43e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 20:40:56,846 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 20:40:56,849 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 20:40:56,873 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 20:40:56,873 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 20:40:56,875 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 20:40:56,877 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 20:40:56,880 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 20:40:56,882 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 20:40:56,883 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 20:40:56,885 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 20:40:56,886 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 20:40:56,887 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 20:40:56,889 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 20:40:56,890 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 20:40:56,892 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 20:40:56,893 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 20:40:56,895 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 20:40:56,897 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 20:40:56,900 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 20:40:56,903 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 20:40:56,904 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 20:40:56,906 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 20:40:56,907 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 20:40:56,914 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 20:40:56,914 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 20:40:56,915 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 20:40:56,916 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 20:40:56,917 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 20:40:56,918 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 20:40:56,919 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 20:40:56,920 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 20:40:56,921 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 20:40:56,922 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 20:40:56,923 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 20:40:56,924 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 20:40:56,924 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 20:40:56,924 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 20:40:56,925 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 20:40:56,926 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 20:40:56,926 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 20:40:56,927 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b40e50-b33c-482c-ae34-cb65959eb018/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 20:40:56,948 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 20:40:56,948 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 20:40:56,949 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 20:40:56,949 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 20:40:56,950 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 20:40:56,950 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 20:40:56,954 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 20:40:56,955 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 20:40:56,955 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 20:40:56,955 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 20:40:56,955 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 20:40:56,955 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 20:40:56,955 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 20:40:56,956 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 20:40:56,956 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 20:40:56,956 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 20:40:56,956 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 20:40:56,956 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 20:40:56,956 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 20:40:56,957 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 20:40:56,957 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 20:40:56,957 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 20:40:56,957 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 20:40:56,957 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 20:40:56,957 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 20:40:56,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 20:40:56,958 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 20:40:56,958 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 20:40:56,958 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 20:40:56,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 20:40:56,958 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 20:40:56,959 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 20:40:56,959 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 20:40:56,959 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 20:40:56,959 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_62b40e50-b33c-482c-ae34-cb65959eb018/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b40e50-b33c-482c-ae34-cb65959eb018/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f222d5749b9bb10b4d4c09b2c40e45ee19dec77732a8593ce917652e8ca8a43e [2022-12-13 20:40:57,156 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 20:40:57,171 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 20:40:57,173 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 20:40:57,174 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 20:40:57,174 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 20:40:57,175 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b40e50-b33c-482c-ae34-cb65959eb018/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/goblint-regression/28-race_reach_51-mutexptr_racefree.i [2022-12-13 20:40:59,808 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 20:41:00,033 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 20:41:00,034 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b40e50-b33c-482c-ae34-cb65959eb018/sv-benchmarks/c/goblint-regression/28-race_reach_51-mutexptr_racefree.i [2022-12-13 20:41:00,045 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b40e50-b33c-482c-ae34-cb65959eb018/bin/uautomizer-uyxdKDjOR8/data/c8e3c8b07/0aea1909ccb842bea1686cd895f9059f/FLAG77c463a39 [2022-12-13 20:41:00,390 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b40e50-b33c-482c-ae34-cb65959eb018/bin/uautomizer-uyxdKDjOR8/data/c8e3c8b07/0aea1909ccb842bea1686cd895f9059f [2022-12-13 20:41:00,394 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 20:41:00,396 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 20:41:00,397 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 20:41:00,398 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 20:41:00,403 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 20:41:00,404 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 08:41:00" (1/1) ... [2022-12-13 20:41:00,405 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4533c6ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:41:00, skipping insertion in model container [2022-12-13 20:41:00,405 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 08:41:00" (1/1) ... [2022-12-13 20:41:00,416 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 20:41:00,449 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 20:41:00,635 WARN L237 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_62b40e50-b33c-482c-ae34-cb65959eb018/sv-benchmarks/c/goblint-regression/28-race_reach_51-mutexptr_racefree.i[30176,30189] [2022-12-13 20:41:00,652 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 20:41:00,661 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 20:41:00,685 WARN L237 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_62b40e50-b33c-482c-ae34-cb65959eb018/sv-benchmarks/c/goblint-regression/28-race_reach_51-mutexptr_racefree.i[30176,30189] [2022-12-13 20:41:00,691 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 20:41:00,714 INFO L208 MainTranslator]: Completed translation [2022-12-13 20:41:00,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:41:00 WrapperNode [2022-12-13 20:41:00,714 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 20:41:00,715 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 20:41:00,715 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 20:41:00,715 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 20:41:00,720 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:41:00" (1/1) ... [2022-12-13 20:41:00,729 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:41:00" (1/1) ... [2022-12-13 20:41:00,744 INFO L138 Inliner]: procedures = 170, calls = 37, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 88 [2022-12-13 20:41:00,744 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 20:41:00,745 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 20:41:00,745 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 20:41:00,745 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 20:41:00,751 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:41:00" (1/1) ... [2022-12-13 20:41:00,751 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:41:00" (1/1) ... [2022-12-13 20:41:00,753 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:41:00" (1/1) ... [2022-12-13 20:41:00,753 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:41:00" (1/1) ... [2022-12-13 20:41:00,758 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:41:00" (1/1) ... [2022-12-13 20:41:00,761 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:41:00" (1/1) ... [2022-12-13 20:41:00,762 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:41:00" (1/1) ... [2022-12-13 20:41:00,763 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:41:00" (1/1) ... [2022-12-13 20:41:00,765 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 20:41:00,766 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 20:41:00,766 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 20:41:00,766 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 20:41:00,767 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:41:00" (1/1) ... [2022-12-13 20:41:00,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 20:41:00,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b40e50-b33c-482c-ae34-cb65959eb018/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:41:00,790 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b40e50-b33c-482c-ae34-cb65959eb018/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 20:41:00,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b40e50-b33c-482c-ae34-cb65959eb018/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 20:41:00,823 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 20:41:00,823 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 20:41:00,824 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-13 20:41:00,824 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 20:41:00,824 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 20:41:00,824 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-12-13 20:41:00,824 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-12-13 20:41:00,824 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 20:41:00,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 20:41:00,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 20:41:00,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 20:41:00,826 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 20:41:00,929 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 20:41:00,930 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 20:41:01,166 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 20:41:01,173 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 20:41:01,173 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-12-13 20:41:01,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 08:41:01 BoogieIcfgContainer [2022-12-13 20:41:01,175 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 20:41:01,177 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 20:41:01,177 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 20:41:01,179 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 20:41:01,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 08:41:00" (1/3) ... [2022-12-13 20:41:01,180 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75254c68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 08:41:01, skipping insertion in model container [2022-12-13 20:41:01,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:41:00" (2/3) ... [2022-12-13 20:41:01,180 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75254c68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 08:41:01, skipping insertion in model container [2022-12-13 20:41:01,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 08:41:01" (3/3) ... [2022-12-13 20:41:01,181 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_51-mutexptr_racefree.i [2022-12-13 20:41:01,194 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 20:41:01,194 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2022-12-13 20:41:01,194 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 20:41:01,245 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-12-13 20:41:01,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 138 places, 147 transitions, 302 flow [2022-12-13 20:41:01,342 INFO L130 PetriNetUnfolder]: 17/195 cut-off events. [2022-12-13 20:41:01,342 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 20:41:01,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201 conditions, 195 events. 17/195 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 568 event pairs, 0 based on Foata normal form. 0/151 useless extension candidates. Maximal degree in co-relation 96. Up to 4 conditions per place. [2022-12-13 20:41:01,348 INFO L82 GeneralOperation]: Start removeDead. Operand has 138 places, 147 transitions, 302 flow [2022-12-13 20:41:01,353 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 138 places, 147 transitions, 302 flow [2022-12-13 20:41:01,357 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 20:41:01,367 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 138 places, 147 transitions, 302 flow [2022-12-13 20:41:01,370 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 138 places, 147 transitions, 302 flow [2022-12-13 20:41:01,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 138 places, 147 transitions, 302 flow [2022-12-13 20:41:01,403 INFO L130 PetriNetUnfolder]: 17/195 cut-off events. [2022-12-13 20:41:01,403 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 20:41:01,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201 conditions, 195 events. 17/195 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 568 event pairs, 0 based on Foata normal form. 0/151 useless extension candidates. Maximal degree in co-relation 96. Up to 4 conditions per place. [2022-12-13 20:41:01,407 INFO L119 LiptonReduction]: Number of co-enabled transitions 4644 [2022-12-13 20:41:04,765 INFO L134 LiptonReduction]: Checked pairs total: 10316 [2022-12-13 20:41:04,765 INFO L136 LiptonReduction]: Total number of compositions: 136 [2022-12-13 20:41:04,778 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 20:41:04,783 INFO L357 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=PETRI_NET, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@144f655c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 20:41:04,783 INFO L358 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2022-12-13 20:41:04,786 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-12-13 20:41:04,786 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 20:41:04,786 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:41:04,787 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 20:41:04,787 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-13 20:41:04,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:41:04,792 INFO L85 PathProgramCache]: Analyzing trace with hash 17784, now seen corresponding path program 1 times [2022-12-13 20:41:04,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:41:04,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478969516] [2022-12-13 20:41:04,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:41:04,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:41:04,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:41:05,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:41:05,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:41:05,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478969516] [2022-12-13 20:41:05,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478969516] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:41:05,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:41:05,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 20:41:05,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660831065] [2022-12-13 20:41:05,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:41:05,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 20:41:05,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:41:05,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 20:41:05,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 20:41:05,081 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 283 [2022-12-13 20:41:05,083 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 49 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 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) [2022-12-13 20:41:05,084 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:41:05,084 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 283 [2022-12-13 20:41:05,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:41:05,201 INFO L130 PetriNetUnfolder]: 196/458 cut-off events. [2022-12-13 20:41:05,202 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 20:41:05,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 905 conditions, 458 events. 196/458 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2379 event pairs, 169 based on Foata normal form. 16/300 useless extension candidates. Maximal degree in co-relation 853. Up to 380 conditions per place. [2022-12-13 20:41:05,206 INFO L137 encePairwiseOnDemand]: 268/283 looper letters, 42 selfloop transitions, 3 changer transitions 0/50 dead transitions. [2022-12-13 20:41:05,206 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 50 transitions, 198 flow [2022-12-13 20:41:05,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 20:41:05,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 20:41:05,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 440 transitions. [2022-12-13 20:41:05,220 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5182567726737338 [2022-12-13 20:41:05,221 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 440 transitions. [2022-12-13 20:41:05,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 440 transitions. [2022-12-13 20:41:05,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:41:05,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 440 transitions. [2022-12-13 20:41:05,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 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) [2022-12-13 20:41:05,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 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) [2022-12-13 20:41:05,233 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 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) [2022-12-13 20:41:05,235 INFO L175 Difference]: Start difference. First operand has 43 places, 49 transitions, 106 flow. Second operand 3 states and 440 transitions. [2022-12-13 20:41:05,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 50 transitions, 198 flow [2022-12-13 20:41:05,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 50 transitions, 198 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 20:41:05,239 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 88 flow [2022-12-13 20:41:05,241 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2022-12-13 20:41:05,245 INFO L288 CegarLoopForPetriNet]: 43 programPoint places, -2 predicate places. [2022-12-13 20:41:05,245 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 88 flow [2022-12-13 20:41:05,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 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) [2022-12-13 20:41:05,245 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:41:05,246 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 20:41:05,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 20:41:05,246 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-13 20:41:05,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:41:05,246 INFO L85 PathProgramCache]: Analyzing trace with hash 17786, now seen corresponding path program 1 times [2022-12-13 20:41:05,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:41:05,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540759379] [2022-12-13 20:41:05,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:41:05,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:41:05,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:41:05,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:41:05,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:41:05,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540759379] [2022-12-13 20:41:05,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540759379] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:41:05,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:41:05,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 20:41:05,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133891847] [2022-12-13 20:41:05,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:41:05,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 20:41:05,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:41:05,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 20:41:05,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 20:41:05,401 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 283 [2022-12-13 20:41:05,402 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 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) [2022-12-13 20:41:05,402 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:41:05,402 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 283 [2022-12-13 20:41:05,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:41:05,499 INFO L130 PetriNetUnfolder]: 195/445 cut-off events. [2022-12-13 20:41:05,499 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 20:41:05,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 924 conditions, 445 events. 195/445 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2567 event pairs, 0 based on Foata normal form. 0/294 useless extension candidates. Maximal degree in co-relation 868. Up to 412 conditions per place. [2022-12-13 20:41:05,503 INFO L137 encePairwiseOnDemand]: 279/283 looper letters, 44 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2022-12-13 20:41:05,503 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 51 transitions, 208 flow [2022-12-13 20:41:05,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 20:41:05,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 20:41:05,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 432 transitions. [2022-12-13 20:41:05,506 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.508833922261484 [2022-12-13 20:41:05,506 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 432 transitions. [2022-12-13 20:41:05,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 432 transitions. [2022-12-13 20:41:05,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:41:05,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 432 transitions. [2022-12-13 20:41:05,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 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) [2022-12-13 20:41:05,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 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) [2022-12-13 20:41:05,511 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 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) [2022-12-13 20:41:05,511 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 88 flow. Second operand 3 states and 432 transitions. [2022-12-13 20:41:05,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 51 transitions, 208 flow [2022-12-13 20:41:05,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 51 transitions, 202 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 20:41:05,514 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 92 flow [2022-12-13 20:41:05,514 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2022-12-13 20:41:05,515 INFO L288 CegarLoopForPetriNet]: 43 programPoint places, -1 predicate places. [2022-12-13 20:41:05,515 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 92 flow [2022-12-13 20:41:05,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 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) [2022-12-13 20:41:05,516 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:41:05,516 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 20:41:05,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 20:41:05,516 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-13 20:41:05,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:41:05,517 INFO L85 PathProgramCache]: Analyzing trace with hash 530223775, now seen corresponding path program 1 times [2022-12-13 20:41:05,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:41:05,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164113244] [2022-12-13 20:41:05,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:41:05,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:41:05,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:41:05,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:41:05,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:41:05,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164113244] [2022-12-13 20:41:05,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164113244] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:41:05,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998908414] [2022-12-13 20:41:05,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:41:05,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:41:05,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b40e50-b33c-482c-ae34-cb65959eb018/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:41:05,627 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b40e50-b33c-482c-ae34-cb65959eb018/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:41:05,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b40e50-b33c-482c-ae34-cb65959eb018/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 20:41:05,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:41:05,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 20:41:05,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:41:05,749 INFO L350 Elim1Store]: Elim1 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 [2022-12-13 20:41:05,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:41:05,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:41:05,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:41:05,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998908414] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:41:05,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:41:05,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-12-13 20:41:05,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827294282] [2022-12-13 20:41:05,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:41:05,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 20:41:05,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:41:05,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 20:41:05,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-12-13 20:41:06,031 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 283 [2022-12-13 20:41:06,032 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 92 flow. Second operand has 8 states, 8 states have (on average 125.875) internal successors, (1007), 8 states have internal predecessors, (1007), 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) [2022-12-13 20:41:06,033 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:41:06,033 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 283 [2022-12-13 20:41:06,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:41:06,111 INFO L130 PetriNetUnfolder]: 26/81 cut-off events. [2022-12-13 20:41:06,111 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2022-12-13 20:41:06,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191 conditions, 81 events. 26/81 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 220 event pairs, 12 based on Foata normal form. 14/85 useless extension candidates. Maximal degree in co-relation 169. Up to 54 conditions per place. [2022-12-13 20:41:06,112 INFO L137 encePairwiseOnDemand]: 279/283 looper letters, 29 selfloop transitions, 2 changer transitions 0/36 dead transitions. [2022-12-13 20:41:06,112 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 36 transitions, 145 flow [2022-12-13 20:41:06,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 20:41:06,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 20:41:06,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 529 transitions. [2022-12-13 20:41:06,115 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4673144876325088 [2022-12-13 20:41:06,115 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 529 transitions. [2022-12-13 20:41:06,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 529 transitions. [2022-12-13 20:41:06,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:41:06,115 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 529 transitions. [2022-12-13 20:41:06,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 132.25) internal successors, (529), 4 states have internal predecessors, (529), 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) [2022-12-13 20:41:06,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 283.0) internal successors, (1415), 5 states have internal predecessors, (1415), 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) [2022-12-13 20:41:06,120 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 283.0) internal successors, (1415), 5 states have internal predecessors, (1415), 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) [2022-12-13 20:41:06,120 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 92 flow. Second operand 4 states and 529 transitions. [2022-12-13 20:41:06,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 36 transitions, 145 flow [2022-12-13 20:41:06,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 36 transitions, 139 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 20:41:06,122 INFO L231 Difference]: Finished difference. Result has 28 places, 22 transitions, 53 flow [2022-12-13 20:41:06,122 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=53, PETRI_PLACES=28, PETRI_TRANSITIONS=22} [2022-12-13 20:41:06,122 INFO L288 CegarLoopForPetriNet]: 43 programPoint places, -15 predicate places. [2022-12-13 20:41:06,122 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 22 transitions, 53 flow [2022-12-13 20:41:06,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 125.875) internal successors, (1007), 8 states have internal predecessors, (1007), 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) [2022-12-13 20:41:06,123 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:41:06,123 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-12-13 20:41:06,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b40e50-b33c-482c-ae34-cb65959eb018/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 20:41:06,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b40e50-b33c-482c-ae34-cb65959eb018/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:41:06,324 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-12-13 20:41:06,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:41:06,325 INFO L85 PathProgramCache]: Analyzing trace with hash -742931801, now seen corresponding path program 1 times [2022-12-13 20:41:06,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:41:06,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764993108] [2022-12-13 20:41:06,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:41:06,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:41:06,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 20:41:06,341 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 20:41:06,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 20:41:06,365 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 20:41:06,365 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 20:41:06,366 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (24 of 25 remaining) [2022-12-13 20:41:06,368 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 25 remaining) [2022-12-13 20:41:06,368 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 25 remaining) [2022-12-13 20:41:06,369 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 25 remaining) [2022-12-13 20:41:06,369 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 25 remaining) [2022-12-13 20:41:06,369 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 25 remaining) [2022-12-13 20:41:06,369 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 25 remaining) [2022-12-13 20:41:06,369 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (17 of 25 remaining) [2022-12-13 20:41:06,369 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (16 of 25 remaining) [2022-12-13 20:41:06,370 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 25 remaining) [2022-12-13 20:41:06,370 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 25 remaining) [2022-12-13 20:41:06,370 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 25 remaining) [2022-12-13 20:41:06,370 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 25 remaining) [2022-12-13 20:41:06,370 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 25 remaining) [2022-12-13 20:41:06,370 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 25 remaining) [2022-12-13 20:41:06,371 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 25 remaining) [2022-12-13 20:41:06,371 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 25 remaining) [2022-12-13 20:41:06,371 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 25 remaining) [2022-12-13 20:41:06,371 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 25 remaining) [2022-12-13 20:41:06,371 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 25 remaining) [2022-12-13 20:41:06,371 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 25 remaining) [2022-12-13 20:41:06,372 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 25 remaining) [2022-12-13 20:41:06,372 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 25 remaining) [2022-12-13 20:41:06,372 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 25 remaining) [2022-12-13 20:41:06,372 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 25 remaining) [2022-12-13 20:41:06,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 20:41:06,372 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-12-13 20:41:06,375 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 20:41:06,375 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-13 20:41:06,397 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 20:41:06,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 178 places, 192 transitions, 402 flow [2022-12-13 20:41:06,438 INFO L130 PetriNetUnfolder]: 31/318 cut-off events. [2022-12-13 20:41:06,439 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 20:41:06,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 332 conditions, 318 events. 31/318 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1129 event pairs, 0 based on Foata normal form. 0/240 useless extension candidates. Maximal degree in co-relation 197. Up to 8 conditions per place. [2022-12-13 20:41:06,441 INFO L82 GeneralOperation]: Start removeDead. Operand has 178 places, 192 transitions, 402 flow [2022-12-13 20:41:06,444 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 178 places, 192 transitions, 402 flow [2022-12-13 20:41:06,444 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 20:41:06,444 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 178 places, 192 transitions, 402 flow [2022-12-13 20:41:06,444 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 178 places, 192 transitions, 402 flow [2022-12-13 20:41:06,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 178 places, 192 transitions, 402 flow [2022-12-13 20:41:06,480 INFO L130 PetriNetUnfolder]: 31/318 cut-off events. [2022-12-13 20:41:06,480 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 20:41:06,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 332 conditions, 318 events. 31/318 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1129 event pairs, 0 based on Foata normal form. 0/240 useless extension candidates. Maximal degree in co-relation 197. Up to 8 conditions per place. [2022-12-13 20:41:06,490 INFO L119 LiptonReduction]: Number of co-enabled transitions 13932 [2022-12-13 20:41:09,955 INFO L134 LiptonReduction]: Checked pairs total: 36015 [2022-12-13 20:41:09,955 INFO L136 LiptonReduction]: Total number of compositions: 165 [2022-12-13 20:41:09,956 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 20:41:09,957 INFO L357 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=PETRI_NET, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@144f655c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 20:41:09,957 INFO L358 AbstractCegarLoop]: Starting to check reachability of 33 error locations. [2022-12-13 20:41:09,958 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-12-13 20:41:09,958 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 20:41:09,958 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:41:09,958 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 20:41:09,958 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-12-13 20:41:09,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:41:09,958 INFO L85 PathProgramCache]: Analyzing trace with hash 30638, now seen corresponding path program 1 times [2022-12-13 20:41:09,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:41:09,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705166283] [2022-12-13 20:41:09,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:41:09,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:41:09,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:41:10,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:41:10,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:41:10,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705166283] [2022-12-13 20:41:10,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705166283] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:41:10,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:41:10,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 20:41:10,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477652916] [2022-12-13 20:41:10,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:41:10,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 20:41:10,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:41:10,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 20:41:10,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 20:41:10,057 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 357 [2022-12-13 20:41:10,058 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 78 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 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) [2022-12-13 20:41:10,058 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:41:10,058 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 357 [2022-12-13 20:41:10,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:41:10,881 INFO L130 PetriNetUnfolder]: 6218/10663 cut-off events. [2022-12-13 20:41:10,881 INFO L131 PetriNetUnfolder]: For 73/73 co-relation queries the response was YES. [2022-12-13 20:41:10,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20612 conditions, 10663 events. 6218/10663 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 79135 event pairs, 2964 based on Foata normal form. 512/7316 useless extension candidates. Maximal degree in co-relation 2023. Up to 9834 conditions per place. [2022-12-13 20:41:10,921 INFO L137 encePairwiseOnDemand]: 335/357 looper letters, 61 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2022-12-13 20:41:10,921 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 75 transitions, 294 flow [2022-12-13 20:41:10,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 20:41:10,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 20:41:10,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 586 transitions. [2022-12-13 20:41:10,925 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5471521942110178 [2022-12-13 20:41:10,925 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 586 transitions. [2022-12-13 20:41:10,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 586 transitions. [2022-12-13 20:41:10,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:41:10,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 586 transitions. [2022-12-13 20:41:10,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 195.33333333333334) internal successors, (586), 3 states have internal predecessors, (586), 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) [2022-12-13 20:41:10,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 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) [2022-12-13 20:41:10,928 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 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) [2022-12-13 20:41:10,928 INFO L175 Difference]: Start difference. First operand has 67 places, 78 transitions, 174 flow. Second operand 3 states and 586 transitions. [2022-12-13 20:41:10,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 75 transitions, 294 flow [2022-12-13 20:41:10,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 75 transitions, 294 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 20:41:10,929 INFO L231 Difference]: Finished difference. Result has 66 places, 61 transitions, 152 flow [2022-12-13 20:41:10,929 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=66, PETRI_TRANSITIONS=61} [2022-12-13 20:41:10,930 INFO L288 CegarLoopForPetriNet]: 67 programPoint places, -1 predicate places. [2022-12-13 20:41:10,930 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 61 transitions, 152 flow [2022-12-13 20:41:10,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 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) [2022-12-13 20:41:10,930 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:41:10,930 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 20:41:10,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 20:41:10,931 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-12-13 20:41:10,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:41:10,931 INFO L85 PathProgramCache]: Analyzing trace with hash 30639, now seen corresponding path program 1 times [2022-12-13 20:41:10,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:41:10,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8843451] [2022-12-13 20:41:10,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:41:10,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:41:10,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:41:10,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:41:10,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:41:10,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8843451] [2022-12-13 20:41:10,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8843451] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:41:10,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:41:10,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 20:41:10,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059783647] [2022-12-13 20:41:10,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:41:10,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 20:41:10,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:41:10,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 20:41:10,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 20:41:10,995 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 357 [2022-12-13 20:41:10,996 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 61 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 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) [2022-12-13 20:41:10,996 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:41:10,997 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 357 [2022-12-13 20:41:10,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:41:11,849 INFO L130 PetriNetUnfolder]: 5507/9372 cut-off events. [2022-12-13 20:41:11,849 INFO L131 PetriNetUnfolder]: For 463/463 co-relation queries the response was YES. [2022-12-13 20:41:11,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18791 conditions, 9372 events. 5507/9372 cut-off events. For 463/463 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 68073 event pairs, 4769 based on Foata normal form. 0/6220 useless extension candidates. Maximal degree in co-relation 18694. Up to 7588 conditions per place. [2022-12-13 20:41:11,882 INFO L137 encePairwiseOnDemand]: 352/357 looper letters, 69 selfloop transitions, 3 changer transitions 0/84 dead transitions. [2022-12-13 20:41:11,882 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 84 transitions, 342 flow [2022-12-13 20:41:11,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 20:41:11,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 20:41:11,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 559 transitions. [2022-12-13 20:41:11,883 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5219421101774043 [2022-12-13 20:41:11,883 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 559 transitions. [2022-12-13 20:41:11,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 559 transitions. [2022-12-13 20:41:11,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:41:11,884 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 559 transitions. [2022-12-13 20:41:11,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.33333333333334) internal successors, (559), 3 states have internal predecessors, (559), 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) [2022-12-13 20:41:11,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 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) [2022-12-13 20:41:11,886 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 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) [2022-12-13 20:41:11,886 INFO L175 Difference]: Start difference. First operand has 66 places, 61 transitions, 152 flow. Second operand 3 states and 559 transitions. [2022-12-13 20:41:11,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 84 transitions, 342 flow [2022-12-13 20:41:11,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 84 transitions, 340 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 20:41:11,888 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 152 flow [2022-12-13 20:41:11,888 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=65, PETRI_TRANSITIONS=59} [2022-12-13 20:41:11,889 INFO L288 CegarLoopForPetriNet]: 67 programPoint places, -2 predicate places. [2022-12-13 20:41:11,889 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 152 flow [2022-12-13 20:41:11,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 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) [2022-12-13 20:41:11,889 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:41:11,889 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 20:41:11,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 20:41:11,890 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-12-13 20:41:11,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:41:11,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1747642843, now seen corresponding path program 1 times [2022-12-13 20:41:11,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:41:11,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805454171] [2022-12-13 20:41:11,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:41:11,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:41:11,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:41:11,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:41:11,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:41:11,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805454171] [2022-12-13 20:41:11,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805454171] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:41:11,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641062175] [2022-12-13 20:41:11,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:41:11,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:41:11,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b40e50-b33c-482c-ae34-cb65959eb018/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:41:11,948 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b40e50-b33c-482c-ae34-cb65959eb018/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:41:11,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b40e50-b33c-482c-ae34-cb65959eb018/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 20:41:12,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:41:12,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 20:41:12,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:41:12,014 INFO L350 Elim1Store]: Elim1 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 [2022-12-13 20:41:12,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:41:12,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:41:12,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:41:12,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641062175] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:41:12,086 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:41:12,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-12-13 20:41:12,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351958423] [2022-12-13 20:41:12,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:41:12,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 20:41:12,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:41:12,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 20:41:12,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-12-13 20:41:12,281 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 357 [2022-12-13 20:41:12,282 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 59 transitions, 152 flow. Second operand has 8 states, 8 states have (on average 162.875) internal successors, (1303), 8 states have internal predecessors, (1303), 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) [2022-12-13 20:41:12,282 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:41:12,282 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 357 [2022-12-13 20:41:12,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:41:12,488 INFO L130 PetriNetUnfolder]: 866/1641 cut-off events. [2022-12-13 20:41:12,489 INFO L131 PetriNetUnfolder]: For 416/416 co-relation queries the response was YES. [2022-12-13 20:41:12,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3468 conditions, 1641 events. 866/1641 cut-off events. For 416/416 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 10077 event pairs, 143 based on Foata normal form. 195/1537 useless extension candidates. Maximal degree in co-relation 3458. Up to 1038 conditions per place. [2022-12-13 20:41:12,494 INFO L137 encePairwiseOnDemand]: 353/357 looper letters, 67 selfloop transitions, 3 changer transitions 0/81 dead transitions. [2022-12-13 20:41:12,494 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 81 transitions, 322 flow [2022-12-13 20:41:12,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 20:41:12,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 20:41:12,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 879 transitions. [2022-12-13 20:41:12,496 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.492436974789916 [2022-12-13 20:41:12,496 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 879 transitions. [2022-12-13 20:41:12,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 879 transitions. [2022-12-13 20:41:12,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:41:12,496 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 879 transitions. [2022-12-13 20:41:12,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 175.8) internal successors, (879), 5 states have internal predecessors, (879), 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) [2022-12-13 20:41:12,499 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 357.0) internal successors, (2142), 6 states have internal predecessors, (2142), 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) [2022-12-13 20:41:12,499 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 357.0) internal successors, (2142), 6 states have internal predecessors, (2142), 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) [2022-12-13 20:41:12,499 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 152 flow. Second operand 5 states and 879 transitions. [2022-12-13 20:41:12,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 81 transitions, 322 flow [2022-12-13 20:41:12,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 81 transitions, 319 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 20:41:12,502 INFO L231 Difference]: Finished difference. Result has 53 places, 42 transitions, 107 flow [2022-12-13 20:41:12,502 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=107, PETRI_PLACES=53, PETRI_TRANSITIONS=42} [2022-12-13 20:41:12,503 INFO L288 CegarLoopForPetriNet]: 67 programPoint places, -14 predicate places. [2022-12-13 20:41:12,503 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 42 transitions, 107 flow [2022-12-13 20:41:12,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 162.875) internal successors, (1303), 8 states have internal predecessors, (1303), 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) [2022-12-13 20:41:12,504 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:41:12,504 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 20:41:12,508 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b40e50-b33c-482c-ae34-cb65959eb018/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 20:41:12,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b40e50-b33c-482c-ae34-cb65959eb018/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:41:12,705 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-12-13 20:41:12,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:41:12,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1747276315, now seen corresponding path program 1 times [2022-12-13 20:41:12,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:41:12,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897964717] [2022-12-13 20:41:12,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:41:12,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:41:12,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:41:12,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:41:12,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:41:12,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897964717] [2022-12-13 20:41:12,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897964717] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:41:12,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:41:12,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 20:41:12,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336352495] [2022-12-13 20:41:12,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:41:12,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 20:41:12,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:41:12,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 20:41:12,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 20:41:12,926 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 357 [2022-12-13 20:41:12,927 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 42 transitions, 107 flow. Second operand has 4 states, 4 states have (on average 158.25) internal successors, (633), 4 states have internal predecessors, (633), 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) [2022-12-13 20:41:12,927 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:41:12,927 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 357 [2022-12-13 20:41:12,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:41:13,018 INFO L130 PetriNetUnfolder]: 622/1196 cut-off events. [2022-12-13 20:41:13,018 INFO L131 PetriNetUnfolder]: For 460/460 co-relation queries the response was YES. [2022-12-13 20:41:13,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2584 conditions, 1196 events. 622/1196 cut-off events. For 460/460 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 6773 event pairs, 622 based on Foata normal form. 33/1063 useless extension candidates. Maximal degree in co-relation 2573. Up to 1053 conditions per place. [2022-12-13 20:41:13,021 INFO L137 encePairwiseOnDemand]: 352/357 looper letters, 26 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2022-12-13 20:41:13,021 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 38 transitions, 153 flow [2022-12-13 20:41:13,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 20:41:13,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 20:41:13,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 501 transitions. [2022-12-13 20:41:13,023 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4677871148459384 [2022-12-13 20:41:13,023 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 501 transitions. [2022-12-13 20:41:13,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 501 transitions. [2022-12-13 20:41:13,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:41:13,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 501 transitions. [2022-12-13 20:41:13,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 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) [2022-12-13 20:41:13,026 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 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) [2022-12-13 20:41:13,027 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 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) [2022-12-13 20:41:13,027 INFO L175 Difference]: Start difference. First operand has 53 places, 42 transitions, 107 flow. Second operand 3 states and 501 transitions. [2022-12-13 20:41:13,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 38 transitions, 153 flow [2022-12-13 20:41:13,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 38 transitions, 146 flow, removed 1 selfloop flow, removed 3 redundant places. [2022-12-13 20:41:13,028 INFO L231 Difference]: Finished difference. Result has 48 places, 38 transitions, 94 flow [2022-12-13 20:41:13,028 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=48, PETRI_TRANSITIONS=38} [2022-12-13 20:41:13,029 INFO L288 CegarLoopForPetriNet]: 67 programPoint places, -19 predicate places. [2022-12-13 20:41:13,029 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 38 transitions, 94 flow [2022-12-13 20:41:13,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 158.25) internal successors, (633), 4 states have internal predecessors, (633), 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) [2022-12-13 20:41:13,030 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:41:13,030 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:41:13,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 20:41:13,030 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-12-13 20:41:13,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:41:13,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1669007855, now seen corresponding path program 1 times [2022-12-13 20:41:13,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:41:13,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411597905] [2022-12-13 20:41:13,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:41:13,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:41:13,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:41:13,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:41:13,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:41:13,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411597905] [2022-12-13 20:41:13,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411597905] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:41:13,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:41:13,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 20:41:13,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124264315] [2022-12-13 20:41:13,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:41:13,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 20:41:13,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:41:13,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 20:41:13,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 20:41:13,149 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 357 [2022-12-13 20:41:13,150 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 38 transitions, 94 flow. Second operand has 4 states, 4 states have (on average 145.5) internal successors, (582), 4 states have internal predecessors, (582), 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) [2022-12-13 20:41:13,150 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:41:13,150 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 357 [2022-12-13 20:41:13,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:41:13,231 INFO L130 PetriNetUnfolder]: 518/917 cut-off events. [2022-12-13 20:41:13,232 INFO L131 PetriNetUnfolder]: For 152/152 co-relation queries the response was YES. [2022-12-13 20:41:13,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1967 conditions, 917 events. 518/917 cut-off events. For 152/152 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 4116 event pairs, 518 based on Foata normal form. 0/911 useless extension candidates. Maximal degree in co-relation 1957. Up to 883 conditions per place. [2022-12-13 20:41:13,234 INFO L137 encePairwiseOnDemand]: 348/357 looper letters, 24 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2022-12-13 20:41:13,234 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 30 transitions, 128 flow [2022-12-13 20:41:13,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 20:41:13,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 20:41:13,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 464 transitions. [2022-12-13 20:41:13,235 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4332399626517274 [2022-12-13 20:41:13,235 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 464 transitions. [2022-12-13 20:41:13,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 464 transitions. [2022-12-13 20:41:13,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:41:13,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 464 transitions. [2022-12-13 20:41:13,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 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) [2022-12-13 20:41:13,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 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) [2022-12-13 20:41:13,237 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 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) [2022-12-13 20:41:13,237 INFO L175 Difference]: Start difference. First operand has 48 places, 38 transitions, 94 flow. Second operand 3 states and 464 transitions. [2022-12-13 20:41:13,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 30 transitions, 128 flow [2022-12-13 20:41:13,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 30 transitions, 127 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 20:41:13,238 INFO L231 Difference]: Finished difference. Result has 41 places, 30 transitions, 79 flow [2022-12-13 20:41:13,238 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=79, PETRI_PLACES=41, PETRI_TRANSITIONS=30} [2022-12-13 20:41:13,239 INFO L288 CegarLoopForPetriNet]: 67 programPoint places, -26 predicate places. [2022-12-13 20:41:13,239 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 30 transitions, 79 flow [2022-12-13 20:41:13,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 145.5) internal successors, (582), 4 states have internal predecessors, (582), 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) [2022-12-13 20:41:13,239 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:41:13,239 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-12-13 20:41:13,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 20:41:13,239 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-12-13 20:41:13,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:41:13,240 INFO L85 PathProgramCache]: Analyzing trace with hash -129327938, now seen corresponding path program 1 times [2022-12-13 20:41:13,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:41:13,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043386741] [2022-12-13 20:41:13,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:41:13,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:41:13,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 20:41:13,254 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 20:41:13,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 20:41:13,264 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 20:41:13,264 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 20:41:13,265 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (32 of 33 remaining) [2022-12-13 20:41:13,265 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 33 remaining) [2022-12-13 20:41:13,265 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 33 remaining) [2022-12-13 20:41:13,265 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 33 remaining) [2022-12-13 20:41:13,265 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 33 remaining) [2022-12-13 20:41:13,265 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 33 remaining) [2022-12-13 20:41:13,265 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 33 remaining) [2022-12-13 20:41:13,265 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (25 of 33 remaining) [2022-12-13 20:41:13,265 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (24 of 33 remaining) [2022-12-13 20:41:13,266 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 33 remaining) [2022-12-13 20:41:13,266 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 33 remaining) [2022-12-13 20:41:13,266 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 33 remaining) [2022-12-13 20:41:13,266 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 33 remaining) [2022-12-13 20:41:13,266 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 33 remaining) [2022-12-13 20:41:13,266 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 33 remaining) [2022-12-13 20:41:13,266 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 33 remaining) [2022-12-13 20:41:13,266 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 33 remaining) [2022-12-13 20:41:13,266 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 33 remaining) [2022-12-13 20:41:13,267 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 33 remaining) [2022-12-13 20:41:13,267 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 33 remaining) [2022-12-13 20:41:13,267 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 33 remaining) [2022-12-13 20:41:13,267 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 33 remaining) [2022-12-13 20:41:13,267 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 33 remaining) [2022-12-13 20:41:13,267 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 33 remaining) [2022-12-13 20:41:13,267 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 33 remaining) [2022-12-13 20:41:13,267 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 33 remaining) [2022-12-13 20:41:13,267 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 33 remaining) [2022-12-13 20:41:13,268 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 33 remaining) [2022-12-13 20:41:13,268 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 33 remaining) [2022-12-13 20:41:13,268 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 33 remaining) [2022-12-13 20:41:13,268 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 33 remaining) [2022-12-13 20:41:13,268 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 33 remaining) [2022-12-13 20:41:13,268 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 33 remaining) [2022-12-13 20:41:13,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 20:41:13,268 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-12-13 20:41:13,269 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 20:41:13,269 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-12-13 20:41:13,290 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 20:41:13,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 218 places, 237 transitions, 504 flow [2022-12-13 20:41:13,336 INFO L130 PetriNetUnfolder]: 50/484 cut-off events. [2022-12-13 20:41:13,336 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-12-13 20:41:13,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 512 conditions, 484 events. 50/484 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1930 event pairs, 1 based on Foata normal form. 0/362 useless extension candidates. Maximal degree in co-relation 326. Up to 16 conditions per place. [2022-12-13 20:41:13,338 INFO L82 GeneralOperation]: Start removeDead. Operand has 218 places, 237 transitions, 504 flow [2022-12-13 20:41:13,341 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 218 places, 237 transitions, 504 flow [2022-12-13 20:41:13,342 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 20:41:13,342 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 218 places, 237 transitions, 504 flow [2022-12-13 20:41:13,342 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 218 places, 237 transitions, 504 flow [2022-12-13 20:41:13,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 218 places, 237 transitions, 504 flow [2022-12-13 20:41:13,382 INFO L130 PetriNetUnfolder]: 50/484 cut-off events. [2022-12-13 20:41:13,382 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-12-13 20:41:13,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 512 conditions, 484 events. 50/484 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1930 event pairs, 1 based on Foata normal form. 0/362 useless extension candidates. Maximal degree in co-relation 326. Up to 16 conditions per place. [2022-12-13 20:41:13,396 INFO L119 LiptonReduction]: Number of co-enabled transitions 26832 [2022-12-13 20:41:16,761 INFO L134 LiptonReduction]: Checked pairs total: 75667 [2022-12-13 20:41:16,761 INFO L136 LiptonReduction]: Total number of compositions: 197 [2022-12-13 20:41:16,762 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 20:41:16,762 INFO L357 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=PETRI_NET, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@144f655c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 20:41:16,762 INFO L358 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2022-12-13 20:41:16,764 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2022-12-13 20:41:16,764 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 20:41:16,764 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:41:16,764 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 20:41:16,764 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 20:41:16,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:41:16,765 INFO L85 PathProgramCache]: Analyzing trace with hash 45970, now seen corresponding path program 1 times [2022-12-13 20:41:16,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:41:16,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959908401] [2022-12-13 20:41:16,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:41:16,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:41:16,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:41:16,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:41:16,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:41:16,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959908401] [2022-12-13 20:41:16,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959908401] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:41:16,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:41:16,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 20:41:16,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385169843] [2022-12-13 20:41:16,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:41:16,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 20:41:16,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:41:16,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 20:41:16,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 20:41:16,885 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 434 [2022-12-13 20:41:16,886 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 105 transitions, 240 flow. Second operand has 3 states, 3 states have (on average 202.66666666666666) internal successors, (608), 3 states have internal predecessors, (608), 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) [2022-12-13 20:41:16,886 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:41:16,886 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 434 [2022-12-13 20:41:16,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:41:29,733 INFO L130 PetriNetUnfolder]: 129155/193097 cut-off events. [2022-12-13 20:41:29,733 INFO L131 PetriNetUnfolder]: For 2378/2378 co-relation queries the response was YES. [2022-12-13 20:41:29,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 373523 conditions, 193097 events. 129155/193097 cut-off events. For 2378/2378 co-relation queries the response was YES. Maximal size of possible extension queue 6072. Compared 1671530 event pairs, 122473 based on Foata normal form. 10417/146214 useless extension candidates. Maximal degree in co-relation 72006. Up to 178753 conditions per place. [2022-12-13 20:41:30,512 INFO L137 encePairwiseOnDemand]: 404/434 looper letters, 77 selfloop transitions, 2 changer transitions 0/96 dead transitions. [2022-12-13 20:41:30,512 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 96 transitions, 380 flow [2022-12-13 20:41:30,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 20:41:30,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 20:41:30,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 721 transitions. [2022-12-13 20:41:30,514 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.553763440860215 [2022-12-13 20:41:30,514 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 721 transitions. [2022-12-13 20:41:30,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 721 transitions. [2022-12-13 20:41:30,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:41:30,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 721 transitions. [2022-12-13 20:41:30,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 240.33333333333334) internal successors, (721), 3 states have internal predecessors, (721), 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) [2022-12-13 20:41:30,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 434.0) internal successors, (1736), 4 states have internal predecessors, (1736), 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) [2022-12-13 20:41:30,517 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 434.0) internal successors, (1736), 4 states have internal predecessors, (1736), 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) [2022-12-13 20:41:30,517 INFO L175 Difference]: Start difference. First operand has 89 places, 105 transitions, 240 flow. Second operand 3 states and 721 transitions. [2022-12-13 20:41:30,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 96 transitions, 380 flow [2022-12-13 20:41:30,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 96 transitions, 380 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 20:41:30,520 INFO L231 Difference]: Finished difference. Result has 86 places, 80 transitions, 202 flow [2022-12-13 20:41:30,520 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=202, PETRI_PLACES=86, PETRI_TRANSITIONS=80} [2022-12-13 20:41:30,521 INFO L288 CegarLoopForPetriNet]: 89 programPoint places, -3 predicate places. [2022-12-13 20:41:30,521 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 80 transitions, 202 flow [2022-12-13 20:41:30,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 202.66666666666666) internal successors, (608), 3 states have internal predecessors, (608), 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) [2022-12-13 20:41:30,521 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:41:30,521 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 20:41:30,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 20:41:30,522 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 20:41:30,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:41:30,522 INFO L85 PathProgramCache]: Analyzing trace with hash 45972, now seen corresponding path program 1 times [2022-12-13 20:41:30,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:41:30,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231406355] [2022-12-13 20:41:30,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:41:30,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:41:30,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:41:30,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:41:30,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:41:30,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231406355] [2022-12-13 20:41:30,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231406355] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:41:30,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:41:30,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 20:41:30,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912676887] [2022-12-13 20:41:30,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:41:30,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 20:41:30,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:41:30,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 20:41:30,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 20:41:30,592 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 434 [2022-12-13 20:41:30,593 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 80 transitions, 202 flow. Second operand has 3 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 states have internal predecessors, (599), 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) [2022-12-13 20:41:30,593 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:41:30,594 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 434 [2022-12-13 20:41:30,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:41:41,768 INFO L130 PetriNetUnfolder]: 113613/168791 cut-off events. [2022-12-13 20:41:41,768 INFO L131 PetriNetUnfolder]: For 7852/7852 co-relation queries the response was YES. [2022-12-13 20:41:41,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 336064 conditions, 168791 events. 113613/168791 cut-off events. For 7852/7852 co-relation queries the response was YES. Maximal size of possible extension queue 5346. Compared 1438951 event pairs, 97133 based on Foata normal form. 0/123531 useless extension candidates. Maximal degree in co-relation 335956. Up to 134834 conditions per place. [2022-12-13 20:41:42,490 INFO L137 encePairwiseOnDemand]: 429/434 looper letters, 96 selfloop transitions, 3 changer transitions 0/116 dead transitions. [2022-12-13 20:41:42,490 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 116 transitions, 472 flow [2022-12-13 20:41:42,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 20:41:42,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 20:41:42,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 697 transitions. [2022-12-13 20:41:42,492 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5353302611367128 [2022-12-13 20:41:42,493 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 697 transitions. [2022-12-13 20:41:42,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 697 transitions. [2022-12-13 20:41:42,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:41:42,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 697 transitions. [2022-12-13 20:41:42,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 232.33333333333334) internal successors, (697), 3 states have internal predecessors, (697), 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) [2022-12-13 20:41:42,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 434.0) internal successors, (1736), 4 states have internal predecessors, (1736), 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) [2022-12-13 20:41:42,497 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 434.0) internal successors, (1736), 4 states have internal predecessors, (1736), 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) [2022-12-13 20:41:42,498 INFO L175 Difference]: Start difference. First operand has 86 places, 80 transitions, 202 flow. Second operand 3 states and 697 transitions. [2022-12-13 20:41:42,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 116 transitions, 472 flow [2022-12-13 20:41:42,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 116 transitions, 470 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 20:41:42,510 INFO L231 Difference]: Finished difference. Result has 85 places, 78 transitions, 202 flow [2022-12-13 20:41:42,510 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=202, PETRI_PLACES=85, PETRI_TRANSITIONS=78} [2022-12-13 20:41:42,511 INFO L288 CegarLoopForPetriNet]: 89 programPoint places, -4 predicate places. [2022-12-13 20:41:42,511 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 78 transitions, 202 flow [2022-12-13 20:41:42,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 states have internal predecessors, (599), 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) [2022-12-13 20:41:42,511 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:41:42,511 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 20:41:42,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 20:41:42,511 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 20:41:42,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:41:42,512 INFO L85 PathProgramCache]: Analyzing trace with hash -457182956, now seen corresponding path program 1 times [2022-12-13 20:41:42,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:41:42,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673396039] [2022-12-13 20:41:42,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:41:42,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:41:42,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:41:42,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:41:42,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:41:42,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673396039] [2022-12-13 20:41:42,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673396039] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:41:42,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:41:42,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 20:41:42,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476614689] [2022-12-13 20:41:42,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:41:42,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 20:41:42,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:41:42,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 20:41:42,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 20:41:42,667 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 434 [2022-12-13 20:41:42,668 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 78 transitions, 202 flow. Second operand has 4 states, 4 states have (on average 191.25) internal successors, (765), 4 states have internal predecessors, (765), 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) [2022-12-13 20:41:42,668 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:41:42,668 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 434 [2022-12-13 20:41:42,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:41:49,160 INFO L130 PetriNetUnfolder]: 66111/99742 cut-off events. [2022-12-13 20:41:49,161 INFO L131 PetriNetUnfolder]: For 6848/6848 co-relation queries the response was YES. [2022-12-13 20:41:49,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202395 conditions, 99742 events. 66111/99742 cut-off events. For 6848/6848 co-relation queries the response was YES. Maximal size of possible extension queue 2986. Compared 814806 event pairs, 55753 based on Foata normal form. 3880/85856 useless extension candidates. Maximal degree in co-relation 169936. Up to 77989 conditions per place. [2022-12-13 20:41:49,600 INFO L137 encePairwiseOnDemand]: 424/434 looper letters, 83 selfloop transitions, 3 changer transitions 0/103 dead transitions. [2022-12-13 20:41:49,600 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 103 transitions, 424 flow [2022-12-13 20:41:49,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 20:41:49,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 20:41:49,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 858 transitions. [2022-12-13 20:41:49,603 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4942396313364055 [2022-12-13 20:41:49,603 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 858 transitions. [2022-12-13 20:41:49,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 858 transitions. [2022-12-13 20:41:49,603 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:41:49,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 858 transitions. [2022-12-13 20:41:49,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 214.5) internal successors, (858), 4 states have internal predecessors, (858), 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) [2022-12-13 20:41:49,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 434.0) internal successors, (2170), 5 states have internal predecessors, (2170), 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) [2022-12-13 20:41:49,607 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 434.0) internal successors, (2170), 5 states have internal predecessors, (2170), 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) [2022-12-13 20:41:49,607 INFO L175 Difference]: Start difference. First operand has 85 places, 78 transitions, 202 flow. Second operand 4 states and 858 transitions. [2022-12-13 20:41:49,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 103 transitions, 424 flow [2022-12-13 20:41:49,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 103 transitions, 418 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 20:41:49,883 INFO L231 Difference]: Finished difference. Result has 79 places, 71 transitions, 188 flow [2022-12-13 20:41:49,884 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=188, PETRI_PLACES=79, PETRI_TRANSITIONS=71} [2022-12-13 20:41:49,884 INFO L288 CegarLoopForPetriNet]: 89 programPoint places, -10 predicate places. [2022-12-13 20:41:49,884 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 71 transitions, 188 flow [2022-12-13 20:41:49,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 191.25) internal successors, (765), 4 states have internal predecessors, (765), 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) [2022-12-13 20:41:49,884 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:41:49,884 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 20:41:49,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-13 20:41:49,885 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 20:41:49,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:41:49,885 INFO L85 PathProgramCache]: Analyzing trace with hash -457614820, now seen corresponding path program 1 times [2022-12-13 20:41:49,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:41:49,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414181929] [2022-12-13 20:41:49,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:41:49,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:41:49,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:41:49,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:41:49,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:41:49,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414181929] [2022-12-13 20:41:49,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414181929] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:41:49,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413288289] [2022-12-13 20:41:49,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:41:49,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:41:49,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b40e50-b33c-482c-ae34-cb65959eb018/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:41:49,932 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b40e50-b33c-482c-ae34-cb65959eb018/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:41:49,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b40e50-b33c-482c-ae34-cb65959eb018/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 20:41:49,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:41:49,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 20:41:49,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:41:50,002 INFO L350 Elim1Store]: Elim1 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 [2022-12-13 20:41:50,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:41:50,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:41:50,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:41:50,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413288289] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:41:50,062 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:41:50,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-12-13 20:41:50,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713469585] [2022-12-13 20:41:50,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:41:50,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 20:41:50,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:41:50,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 20:41:50,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-13 20:41:50,360 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 434 [2022-12-13 20:41:50,361 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 71 transitions, 188 flow. Second operand has 7 states, 7 states have (on average 200.71428571428572) internal successors, (1405), 7 states have internal predecessors, (1405), 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) [2022-12-13 20:41:50,361 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:41:50,361 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 434 [2022-12-13 20:41:50,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:41:55,849 INFO L130 PetriNetUnfolder]: 62520/92006 cut-off events. [2022-12-13 20:41:55,849 INFO L131 PetriNetUnfolder]: For 7425/7425 co-relation queries the response was YES. [2022-12-13 20:41:55,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193007 conditions, 92006 events. 62520/92006 cut-off events. For 7425/7425 co-relation queries the response was YES. Maximal size of possible extension queue 2530. Compared 718395 event pairs, 170 based on Foata normal form. 13/76416 useless extension candidates. Maximal degree in co-relation 159540. Up to 63763 conditions per place. [2022-12-13 20:41:56,239 INFO L137 encePairwiseOnDemand]: 428/434 looper letters, 160 selfloop transitions, 8 changer transitions 0/185 dead transitions. [2022-12-13 20:41:56,239 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 185 transitions, 764 flow [2022-12-13 20:41:56,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 20:41:56,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 20:41:56,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1366 transitions. [2022-12-13 20:41:56,241 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5245775729646698 [2022-12-13 20:41:56,242 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1366 transitions. [2022-12-13 20:41:56,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1366 transitions. [2022-12-13 20:41:56,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:41:56,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1366 transitions. [2022-12-13 20:41:56,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 227.66666666666666) internal successors, (1366), 6 states have internal predecessors, (1366), 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) [2022-12-13 20:41:56,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 434.0) internal successors, (3038), 7 states have internal predecessors, (3038), 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) [2022-12-13 20:41:56,247 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 434.0) internal successors, (3038), 7 states have internal predecessors, (3038), 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) [2022-12-13 20:41:56,248 INFO L175 Difference]: Start difference. First operand has 79 places, 71 transitions, 188 flow. Second operand 6 states and 1366 transitions. [2022-12-13 20:41:56,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 185 transitions, 764 flow [2022-12-13 20:41:57,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 185 transitions, 758 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 20:41:57,986 INFO L231 Difference]: Finished difference. Result has 82 places, 73 transitions, 210 flow [2022-12-13 20:41:57,986 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=210, PETRI_PLACES=82, PETRI_TRANSITIONS=73} [2022-12-13 20:41:57,986 INFO L288 CegarLoopForPetriNet]: 89 programPoint places, -7 predicate places. [2022-12-13 20:41:57,986 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 73 transitions, 210 flow [2022-12-13 20:41:57,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 200.71428571428572) internal successors, (1405), 7 states have internal predecessors, (1405), 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) [2022-12-13 20:41:57,987 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:41:57,987 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:41:57,992 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b40e50-b33c-482c-ae34-cb65959eb018/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 20:41:58,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b40e50-b33c-482c-ae34-cb65959eb018/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 20:41:58,188 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 20:41:58,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:41:58,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1287773438, now seen corresponding path program 1 times [2022-12-13 20:41:58,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:41:58,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320991105] [2022-12-13 20:41:58,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:41:58,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:41:58,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:41:58,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:41:58,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:41:58,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320991105] [2022-12-13 20:41:58,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320991105] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:41:58,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:41:58,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 20:41:58,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103036798] [2022-12-13 20:41:58,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:41:58,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 20:41:58,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:41:58,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 20:41:58,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 20:41:58,371 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 434 [2022-12-13 20:41:58,372 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 73 transitions, 210 flow. Second operand has 4 states, 4 states have (on average 174.25) internal successors, (697), 4 states have internal predecessors, (697), 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) [2022-12-13 20:41:58,372 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:41:58,372 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 434 [2022-12-13 20:41:58,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:42:03,729 INFO L130 PetriNetUnfolder]: 53214/80798 cut-off events. [2022-12-13 20:42:03,729 INFO L131 PetriNetUnfolder]: For 9451/9451 co-relation queries the response was YES. [2022-12-13 20:42:03,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172853 conditions, 80798 events. 53214/80798 cut-off events. For 9451/9451 co-relation queries the response was YES. Maximal size of possible extension queue 2198. Compared 620895 event pairs, 34062 based on Foata normal form. 1188/71978 useless extension candidates. Maximal degree in co-relation 57575. Up to 46115 conditions per place. [2022-12-13 20:42:04,036 INFO L137 encePairwiseOnDemand]: 406/434 looper letters, 102 selfloop transitions, 17 changer transitions 0/128 dead transitions. [2022-12-13 20:42:04,036 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 128 transitions, 558 flow [2022-12-13 20:42:04,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 20:42:04,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 20:42:04,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 832 transitions. [2022-12-13 20:42:04,038 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4792626728110599 [2022-12-13 20:42:04,038 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 832 transitions. [2022-12-13 20:42:04,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 832 transitions. [2022-12-13 20:42:04,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:42:04,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 832 transitions. [2022-12-13 20:42:04,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 208.0) internal successors, (832), 4 states have internal predecessors, (832), 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) [2022-12-13 20:42:04,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 434.0) internal successors, (2170), 5 states have internal predecessors, (2170), 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) [2022-12-13 20:42:04,042 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 434.0) internal successors, (2170), 5 states have internal predecessors, (2170), 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) [2022-12-13 20:42:04,042 INFO L175 Difference]: Start difference. First operand has 82 places, 73 transitions, 210 flow. Second operand 4 states and 832 transitions. [2022-12-13 20:42:04,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 128 transitions, 558 flow [2022-12-13 20:42:04,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 128 transitions, 549 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-12-13 20:42:04,052 INFO L231 Difference]: Finished difference. Result has 85 places, 84 transitions, 363 flow [2022-12-13 20:42:04,052 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=363, PETRI_PLACES=85, PETRI_TRANSITIONS=84} [2022-12-13 20:42:04,053 INFO L288 CegarLoopForPetriNet]: 89 programPoint places, -4 predicate places. [2022-12-13 20:42:04,053 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 84 transitions, 363 flow [2022-12-13 20:42:04,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 174.25) internal successors, (697), 4 states have internal predecessors, (697), 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) [2022-12-13 20:42:04,053 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:42:04,053 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-13 20:42:04,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-13 20:42:04,053 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 20:42:04,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:42:04,054 INFO L85 PathProgramCache]: Analyzing trace with hash -423561944, now seen corresponding path program 1 times [2022-12-13 20:42:04,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:42:04,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548287204] [2022-12-13 20:42:04,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:42:04,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:42:04,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:42:04,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:42:04,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:42:04,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548287204] [2022-12-13 20:42:04,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548287204] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:42:04,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078140928] [2022-12-13 20:42:04,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:42:04,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:42:04,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b40e50-b33c-482c-ae34-cb65959eb018/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:42:04,094 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b40e50-b33c-482c-ae34-cb65959eb018/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:42:04,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b40e50-b33c-482c-ae34-cb65959eb018/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 20:42:04,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:42:04,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 20:42:04,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:42:04,184 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:42:04,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:42:04,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:42:04,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078140928] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:42:04,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:42:04,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-12-13 20:42:04,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077590377] [2022-12-13 20:42:04,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:42:04,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 20:42:04,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:42:04,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 20:42:04,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-12-13 20:42:04,242 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 434 [2022-12-13 20:42:04,244 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 84 transitions, 363 flow. Second operand has 9 states, 9 states have (on average 204.33333333333334) internal successors, (1839), 9 states have internal predecessors, (1839), 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) [2022-12-13 20:42:04,244 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:42:04,244 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 434 [2022-12-13 20:42:04,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:42:05,316 INFO L130 PetriNetUnfolder]: 8121/12977 cut-off events. [2022-12-13 20:42:05,316 INFO L131 PetriNetUnfolder]: For 10048/10126 co-relation queries the response was YES. [2022-12-13 20:42:05,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34564 conditions, 12977 events. 8121/12977 cut-off events. For 10048/10126 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 87089 event pairs, 139 based on Foata normal form. 1180/14072 useless extension candidates. Maximal degree in co-relation 34554. Up to 7926 conditions per place. [2022-12-13 20:42:05,358 INFO L137 encePairwiseOnDemand]: 431/434 looper letters, 86 selfloop transitions, 4 changer transitions 0/98 dead transitions. [2022-12-13 20:42:05,358 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 98 transitions, 482 flow [2022-12-13 20:42:05,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 20:42:05,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 20:42:05,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1304 transitions. [2022-12-13 20:42:05,360 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.500768049155146 [2022-12-13 20:42:05,360 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1304 transitions. [2022-12-13 20:42:05,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1304 transitions. [2022-12-13 20:42:05,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:42:05,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1304 transitions. [2022-12-13 20:42:05,362 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 217.33333333333334) internal successors, (1304), 6 states have internal predecessors, (1304), 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) [2022-12-13 20:42:05,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 434.0) internal successors, (3038), 7 states have internal predecessors, (3038), 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) [2022-12-13 20:42:05,365 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 434.0) internal successors, (3038), 7 states have internal predecessors, (3038), 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) [2022-12-13 20:42:05,365 INFO L175 Difference]: Start difference. First operand has 85 places, 84 transitions, 363 flow. Second operand 6 states and 1304 transitions. [2022-12-13 20:42:05,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 98 transitions, 482 flow [2022-12-13 20:42:05,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 98 transitions, 468 flow, removed 4 selfloop flow, removed 4 redundant places. [2022-12-13 20:42:05,386 INFO L231 Difference]: Finished difference. Result has 60 places, 43 transitions, 142 flow [2022-12-13 20:42:05,386 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=142, PETRI_PLACES=60, PETRI_TRANSITIONS=43} [2022-12-13 20:42:05,387 INFO L288 CegarLoopForPetriNet]: 89 programPoint places, -29 predicate places. [2022-12-13 20:42:05,387 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 43 transitions, 142 flow [2022-12-13 20:42:05,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 204.33333333333334) internal successors, (1839), 9 states have internal predecessors, (1839), 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) [2022-12-13 20:42:05,388 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:42:05,388 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-12-13 20:42:05,393 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b40e50-b33c-482c-ae34-cb65959eb018/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 20:42:05,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b40e50-b33c-482c-ae34-cb65959eb018/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 20:42:05,589 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-13 20:42:05,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:42:05,590 INFO L85 PathProgramCache]: Analyzing trace with hash -28868441, now seen corresponding path program 1 times [2022-12-13 20:42:05,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:42:05,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951821065] [2022-12-13 20:42:05,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:42:05,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:42:05,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 20:42:05,631 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 20:42:05,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 20:42:05,649 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 20:42:05,649 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 20:42:05,650 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (40 of 41 remaining) [2022-12-13 20:42:05,650 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 41 remaining) [2022-12-13 20:42:05,650 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 41 remaining) [2022-12-13 20:42:05,650 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 41 remaining) [2022-12-13 20:42:05,650 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 41 remaining) [2022-12-13 20:42:05,650 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 41 remaining) [2022-12-13 20:42:05,650 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 41 remaining) [2022-12-13 20:42:05,650 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (33 of 41 remaining) [2022-12-13 20:42:05,651 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (32 of 41 remaining) [2022-12-13 20:42:05,651 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 41 remaining) [2022-12-13 20:42:05,651 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 41 remaining) [2022-12-13 20:42:05,651 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 41 remaining) [2022-12-13 20:42:05,651 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 41 remaining) [2022-12-13 20:42:05,651 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 41 remaining) [2022-12-13 20:42:05,651 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 41 remaining) [2022-12-13 20:42:05,651 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 41 remaining) [2022-12-13 20:42:05,652 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 41 remaining) [2022-12-13 20:42:05,652 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 41 remaining) [2022-12-13 20:42:05,652 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 41 remaining) [2022-12-13 20:42:05,652 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 41 remaining) [2022-12-13 20:42:05,652 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 41 remaining) [2022-12-13 20:42:05,652 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 41 remaining) [2022-12-13 20:42:05,652 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 41 remaining) [2022-12-13 20:42:05,652 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 41 remaining) [2022-12-13 20:42:05,652 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 41 remaining) [2022-12-13 20:42:05,653 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 41 remaining) [2022-12-13 20:42:05,653 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 41 remaining) [2022-12-13 20:42:05,653 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 41 remaining) [2022-12-13 20:42:05,653 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 41 remaining) [2022-12-13 20:42:05,653 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 41 remaining) [2022-12-13 20:42:05,653 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 41 remaining) [2022-12-13 20:42:05,653 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 41 remaining) [2022-12-13 20:42:05,653 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 41 remaining) [2022-12-13 20:42:05,653 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 41 remaining) [2022-12-13 20:42:05,654 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 41 remaining) [2022-12-13 20:42:05,654 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 41 remaining) [2022-12-13 20:42:05,654 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 41 remaining) [2022-12-13 20:42:05,654 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 41 remaining) [2022-12-13 20:42:05,654 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 41 remaining) [2022-12-13 20:42:05,654 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 41 remaining) [2022-12-13 20:42:05,654 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 41 remaining) [2022-12-13 20:42:05,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-13 20:42:05,655 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:42:05,655 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 20:42:05,655 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-12-13 20:42:05,682 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-12-13 20:42:05,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 258 places, 282 transitions, 608 flow [2022-12-13 20:42:05,772 INFO L130 PetriNetUnfolder]: 81/738 cut-off events. [2022-12-13 20:42:05,772 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-12-13 20:42:05,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 793 conditions, 738 events. 81/738 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3323 event pairs, 6 based on Foata normal form. 0/552 useless extension candidates. Maximal degree in co-relation 504. Up to 32 conditions per place. [2022-12-13 20:42:05,777 INFO L82 GeneralOperation]: Start removeDead. Operand has 258 places, 282 transitions, 608 flow [2022-12-13 20:42:05,781 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 258 places, 282 transitions, 608 flow [2022-12-13 20:42:05,781 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 20:42:05,781 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 258 places, 282 transitions, 608 flow [2022-12-13 20:42:05,781 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 258 places, 282 transitions, 608 flow [2022-12-13 20:42:05,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 258 places, 282 transitions, 608 flow [2022-12-13 20:42:05,854 INFO L130 PetriNetUnfolder]: 81/738 cut-off events. [2022-12-13 20:42:05,855 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-12-13 20:42:05,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 793 conditions, 738 events. 81/738 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3323 event pairs, 6 based on Foata normal form. 0/552 useless extension candidates. Maximal degree in co-relation 504. Up to 32 conditions per place. [2022-12-13 20:42:05,876 INFO L119 LiptonReduction]: Number of co-enabled transitions 43688 [2022-12-13 20:42:10,581 INFO L134 LiptonReduction]: Checked pairs total: 129241 [2022-12-13 20:42:10,581 INFO L136 LiptonReduction]: Total number of compositions: 236 [2022-12-13 20:42:10,582 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 20:42:10,583 INFO L357 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=PETRI_NET, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@144f655c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 20:42:10,583 INFO L358 AbstractCegarLoop]: Starting to check reachability of 49 error locations. [2022-12-13 20:42:10,583 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-12-13 20:42:10,583 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 20:42:10,584 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:42:10,584 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 20:42:10,584 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2022-12-13 20:42:10,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:42:10,584 INFO L85 PathProgramCache]: Analyzing trace with hash 63960, now seen corresponding path program 1 times [2022-12-13 20:42:10,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:42:10,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550971951] [2022-12-13 20:42:10,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:42:10,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:42:10,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:42:10,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:42:10,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:42:10,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550971951] [2022-12-13 20:42:10,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550971951] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:42:10,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:42:10,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 20:42:10,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873595808] [2022-12-13 20:42:10,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:42:10,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 20:42:10,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:42:10,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 20:42:10,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 20:42:10,653 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 518 [2022-12-13 20:42:10,653 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 132 transitions, 308 flow. Second operand has 3 states, 3 states have (on average 236.66666666666666) internal successors, (710), 3 states have internal predecessors, (710), 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) [2022-12-13 20:42:10,653 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:42:10,653 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 518 [2022-12-13 20:42:10,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand