./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-ext/36_stack_cas_p0_vs_concur.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a829f1cf-4811-4c48-8651-65b8cf828c40/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a829f1cf-4811-4c48-8651-65b8cf828c40/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_a829f1cf-4811-4c48-8651-65b8cf828c40/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a829f1cf-4811-4c48-8651-65b8cf828c40/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-ext/36_stack_cas_p0_vs_concur.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a829f1cf-4811-4c48-8651-65b8cf828c40/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_a829f1cf-4811-4c48-8651-65b8cf828c40/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 e7fe0631e7f950e2868c8cb954edca4f6de3fdffbf6debba58771511fbac2e8b --- 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 22:29:37,617 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 22:29:37,619 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 22:29:37,637 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 22:29:37,638 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 22:29:37,639 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 22:29:37,640 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 22:29:37,642 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 22:29:37,643 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 22:29:37,644 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 22:29:37,645 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 22:29:37,646 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 22:29:37,646 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 22:29:37,648 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 22:29:37,649 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 22:29:37,650 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 22:29:37,651 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 22:29:37,652 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 22:29:37,653 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 22:29:37,655 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 22:29:37,656 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 22:29:37,658 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 22:29:37,659 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 22:29:37,660 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 22:29:37,663 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 22:29:37,663 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 22:29:37,664 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 22:29:37,665 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 22:29:37,665 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 22:29:37,666 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 22:29:37,666 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 22:29:37,667 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 22:29:37,668 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 22:29:37,669 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 22:29:37,670 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 22:29:37,670 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 22:29:37,670 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 22:29:37,671 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 22:29:37,671 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 22:29:37,672 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 22:29:37,672 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 22:29:37,673 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a829f1cf-4811-4c48-8651-65b8cf828c40/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 22:29:37,695 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 22:29:37,695 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 22:29:37,695 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 22:29:37,695 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 22:29:37,696 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 22:29:37,696 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 22:29:37,697 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 22:29:37,697 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 22:29:37,697 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 22:29:37,697 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 22:29:37,698 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 22:29:37,698 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 22:29:37,698 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 22:29:37,698 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 22:29:37,698 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 22:29:37,698 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 22:29:37,699 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 22:29:37,699 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 22:29:37,699 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 22:29:37,699 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 22:29:37,699 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 22:29:37,700 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 22:29:37,700 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 22:29:37,700 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 22:29:37,700 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 22:29:37,700 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 22:29:37,701 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 22:29:37,701 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 22:29:37,701 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 22:29:37,701 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 22:29:37,701 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 22:29:37,701 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 22:29:37,702 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 22:29:37,702 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 22:29:37,702 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_a829f1cf-4811-4c48-8651-65b8cf828c40/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a829f1cf-4811-4c48-8651-65b8cf828c40/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e7fe0631e7f950e2868c8cb954edca4f6de3fdffbf6debba58771511fbac2e8b [2022-12-13 22:29:37,892 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 22:29:37,909 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 22:29:37,911 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 22:29:37,912 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 22:29:37,912 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 22:29:37,913 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a829f1cf-4811-4c48-8651-65b8cf828c40/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/pthread-ext/36_stack_cas_p0_vs_concur.i [2022-12-13 22:29:40,581 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 22:29:40,783 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 22:29:40,784 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a829f1cf-4811-4c48-8651-65b8cf828c40/sv-benchmarks/c/pthread-ext/36_stack_cas_p0_vs_concur.i [2022-12-13 22:29:40,795 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a829f1cf-4811-4c48-8651-65b8cf828c40/bin/uautomizer-uyxdKDjOR8/data/c73745e47/c36ccf629d8746038825d63aeb02301c/FLAG53e6fadef [2022-12-13 22:29:40,807 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a829f1cf-4811-4c48-8651-65b8cf828c40/bin/uautomizer-uyxdKDjOR8/data/c73745e47/c36ccf629d8746038825d63aeb02301c [2022-12-13 22:29:40,809 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 22:29:40,810 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 22:29:40,811 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 22:29:40,811 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 22:29:40,814 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 22:29:40,814 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 10:29:40" (1/1) ... [2022-12-13 22:29:40,815 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@663c2289 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:29:40, skipping insertion in model container [2022-12-13 22:29:40,815 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 10:29:40" (1/1) ... [2022-12-13 22:29:40,821 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 22:29:40,854 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 22:29:41,107 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_a829f1cf-4811-4c48-8651-65b8cf828c40/sv-benchmarks/c/pthread-ext/36_stack_cas_p0_vs_concur.i[30687,30700] [2022-12-13 22:29:41,112 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 22:29:41,120 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 22:29:41,155 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_a829f1cf-4811-4c48-8651-65b8cf828c40/sv-benchmarks/c/pthread-ext/36_stack_cas_p0_vs_concur.i[30687,30700] [2022-12-13 22:29:41,157 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 22:29:41,183 INFO L208 MainTranslator]: Completed translation [2022-12-13 22:29:41,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:29:41 WrapperNode [2022-12-13 22:29:41,183 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 22:29:41,184 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 22:29:41,184 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 22:29:41,184 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 22:29:41,189 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:29:41" (1/1) ... [2022-12-13 22:29:41,201 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:29:41" (1/1) ... [2022-12-13 22:29:41,222 INFO L138 Inliner]: procedures = 170, calls = 35, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 104 [2022-12-13 22:29:41,222 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 22:29:41,223 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 22:29:41,223 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 22:29:41,223 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 22:29:41,231 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:29:41" (1/1) ... [2022-12-13 22:29:41,231 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:29:41" (1/1) ... [2022-12-13 22:29:41,233 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:29:41" (1/1) ... [2022-12-13 22:29:41,234 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:29:41" (1/1) ... [2022-12-13 22:29:41,239 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:29:41" (1/1) ... [2022-12-13 22:29:41,243 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:29:41" (1/1) ... [2022-12-13 22:29:41,244 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:29:41" (1/1) ... [2022-12-13 22:29:41,246 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:29:41" (1/1) ... [2022-12-13 22:29:41,248 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 22:29:41,249 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 22:29:41,249 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 22:29:41,250 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 22:29:41,250 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:29:41" (1/1) ... [2022-12-13 22:29:41,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 22:29:41,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a829f1cf-4811-4c48-8651-65b8cf828c40/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:29:41,275 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a829f1cf-4811-4c48-8651-65b8cf828c40/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 22:29:41,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a829f1cf-4811-4c48-8651-65b8cf828c40/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 22:29:41,304 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 22:29:41,304 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-12-13 22:29:41,304 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-12-13 22:29:41,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 22:29:41,304 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 22:29:41,304 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 22:29:41,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 22:29:41,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 22:29:41,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 22:29:41,305 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 22:29:41,307 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 22:29:41,417 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 22:29:41,419 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 22:29:41,635 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 22:29:41,737 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 22:29:41,738 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-13 22:29:41,741 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 10:29:41 BoogieIcfgContainer [2022-12-13 22:29:41,742 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 22:29:41,744 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 22:29:41,744 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 22:29:41,747 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 22:29:41,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 10:29:40" (1/3) ... [2022-12-13 22:29:41,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ef5cab8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 10:29:41, skipping insertion in model container [2022-12-13 22:29:41,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:29:41" (2/3) ... [2022-12-13 22:29:41,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ef5cab8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 10:29:41, skipping insertion in model container [2022-12-13 22:29:41,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 10:29:41" (3/3) ... [2022-12-13 22:29:41,750 INFO L112 eAbstractionObserver]: Analyzing ICFG 36_stack_cas_p0_vs_concur.i [2022-12-13 22:29:41,766 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 22:29:41,766 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2022-12-13 22:29:41,766 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 22:29:41,856 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 22:29:41,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 127 places, 133 transitions, 271 flow [2022-12-13 22:29:41,934 INFO L130 PetriNetUnfolder]: 10/149 cut-off events. [2022-12-13 22:29:41,935 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 22:29:41,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 149 events. 10/149 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 316 event pairs, 0 based on Foata normal form. 0/102 useless extension candidates. Maximal degree in co-relation 112. Up to 4 conditions per place. [2022-12-13 22:29:41,941 INFO L82 GeneralOperation]: Start removeDead. Operand has 127 places, 133 transitions, 271 flow [2022-12-13 22:29:41,948 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 127 places, 133 transitions, 271 flow [2022-12-13 22:29:41,951 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 22:29:41,960 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 127 places, 133 transitions, 271 flow [2022-12-13 22:29:41,963 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 127 places, 133 transitions, 271 flow [2022-12-13 22:29:41,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 127 places, 133 transitions, 271 flow [2022-12-13 22:29:41,996 INFO L130 PetriNetUnfolder]: 10/149 cut-off events. [2022-12-13 22:29:41,996 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 22:29:41,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 149 events. 10/149 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 316 event pairs, 0 based on Foata normal form. 0/102 useless extension candidates. Maximal degree in co-relation 112. Up to 4 conditions per place. [2022-12-13 22:29:42,001 INFO L119 LiptonReduction]: Number of co-enabled transitions 3572 [2022-12-13 22:29:44,110 INFO L134 LiptonReduction]: Checked pairs total: 8975 [2022-12-13 22:29:44,111 INFO L136 LiptonReduction]: Total number of compositions: 120 [2022-12-13 22:29:44,125 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 22:29:44,131 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;@72aa2e14, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 22:29:44,131 INFO L358 AbstractCegarLoop]: Starting to check reachability of 62 error locations. [2022-12-13 22:29:44,133 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2022-12-13 22:29:44,133 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 22:29:44,133 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:29:44,133 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 22:29:44,134 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2022-12-13 22:29:44,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:29:44,137 INFO L85 PathProgramCache]: Analyzing trace with hash 20067, now seen corresponding path program 1 times [2022-12-13 22:29:44,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:29:44,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601732063] [2022-12-13 22:29:44,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:29:44,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:29:44,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:29:44,341 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 22:29:44,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:29:44,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601732063] [2022-12-13 22:29:44,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601732063] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:29:44,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:29:44,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 22:29:44,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258025719] [2022-12-13 22:29:44,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:29:44,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 22:29:44,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:29:44,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 22:29:44,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 22:29:44,425 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 253 [2022-12-13 22:29:44,428 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 58 transitions, 121 flow. Second operand has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 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 22:29:44,428 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:29:44,428 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 253 [2022-12-13 22:29:44,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:29:44,514 INFO L130 PetriNetUnfolder]: 100/250 cut-off events. [2022-12-13 22:29:44,514 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 22:29:44,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 490 conditions, 250 events. 100/250 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 987 event pairs, 92 based on Foata normal form. 0/136 useless extension candidates. Maximal degree in co-relation 467. Up to 230 conditions per place. [2022-12-13 22:29:44,517 INFO L137 encePairwiseOnDemand]: 242/253 looper letters, 36 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2022-12-13 22:29:44,517 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 44 transitions, 167 flow [2022-12-13 22:29:44,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 22:29:44,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 22:29:44,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 362 transitions. [2022-12-13 22:29:44,531 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4769433465085639 [2022-12-13 22:29:44,532 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 362 transitions. [2022-12-13 22:29:44,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 362 transitions. [2022-12-13 22:29:44,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:29:44,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 362 transitions. [2022-12-13 22:29:44,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 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 22:29:44,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 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 22:29:44,545 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 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 22:29:44,547 INFO L175 Difference]: Start difference. First operand has 58 places, 58 transitions, 121 flow. Second operand 3 states and 362 transitions. [2022-12-13 22:29:44,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 44 transitions, 167 flow [2022-12-13 22:29:44,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 44 transitions, 167 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 22:29:44,552 INFO L231 Difference]: Finished difference. Result has 47 places, 44 transitions, 95 flow [2022-12-13 22:29:44,554 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=95, PETRI_PLACES=47, PETRI_TRANSITIONS=44} [2022-12-13 22:29:44,557 INFO L288 CegarLoopForPetriNet]: 58 programPoint places, -11 predicate places. [2022-12-13 22:29:44,558 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 44 transitions, 95 flow [2022-12-13 22:29:44,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 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 22:29:44,558 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:29:44,558 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 22:29:44,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 22:29:44,559 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2022-12-13 22:29:44,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:29:44,560 INFO L85 PathProgramCache]: Analyzing trace with hash 20065, now seen corresponding path program 1 times [2022-12-13 22:29:44,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:29:44,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079301249] [2022-12-13 22:29:44,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:29:44,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:29:44,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:29:44,603 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 22:29:44,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:29:44,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079301249] [2022-12-13 22:29:44,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079301249] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:29:44,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:29:44,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 22:29:44,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371170320] [2022-12-13 22:29:44,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:29:44,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 22:29:44,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:29:44,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 22:29:44,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 22:29:44,646 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 253 [2022-12-13 22:29:44,647 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 44 transitions, 95 flow. Second operand has 3 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 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 22:29:44,647 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:29:44,647 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 253 [2022-12-13 22:29:44,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:29:44,777 INFO L130 PetriNetUnfolder]: 157/404 cut-off events. [2022-12-13 22:29:44,778 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 22:29:44,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 791 conditions, 404 events. 157/404 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1597 event pairs, 84 based on Foata normal form. 0/238 useless extension candidates. Maximal degree in co-relation 784. Up to 195 conditions per place. [2022-12-13 22:29:44,779 INFO L137 encePairwiseOnDemand]: 248/253 looper letters, 67 selfloop transitions, 4 changer transitions 0/78 dead transitions. [2022-12-13 22:29:44,779 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 78 transitions, 305 flow [2022-12-13 22:29:44,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 22:29:44,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 22:29:44,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 369 transitions. [2022-12-13 22:29:44,783 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48616600790513836 [2022-12-13 22:29:44,783 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 369 transitions. [2022-12-13 22:29:44,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 369 transitions. [2022-12-13 22:29:44,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:29:44,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 369 transitions. [2022-12-13 22:29:44,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 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 22:29:44,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 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 22:29:44,787 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 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 22:29:44,787 INFO L175 Difference]: Start difference. First operand has 47 places, 44 transitions, 95 flow. Second operand 3 states and 369 transitions. [2022-12-13 22:29:44,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 78 transitions, 305 flow [2022-12-13 22:29:44,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 78 transitions, 304 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 22:29:44,789 INFO L231 Difference]: Finished difference. Result has 50 places, 47 transitions, 124 flow [2022-12-13 22:29:44,789 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=50, PETRI_TRANSITIONS=47} [2022-12-13 22:29:44,789 INFO L288 CegarLoopForPetriNet]: 58 programPoint places, -8 predicate places. [2022-12-13 22:29:44,790 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 47 transitions, 124 flow [2022-12-13 22:29:44,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 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 22:29:44,790 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:29:44,790 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-12-13 22:29:44,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 22:29:44,790 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2022-12-13 22:29:44,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:29:44,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1366309126, now seen corresponding path program 1 times [2022-12-13 22:29:44,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:29:44,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135607935] [2022-12-13 22:29:44,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:29:44,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:29:44,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 22:29:44,801 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 22:29:44,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 22:29:44,821 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 22:29:44,821 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 22:29:44,822 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (61 of 62 remaining) [2022-12-13 22:29:44,823 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 62 remaining) [2022-12-13 22:29:44,824 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 62 remaining) [2022-12-13 22:29:44,824 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 62 remaining) [2022-12-13 22:29:44,824 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 62 remaining) [2022-12-13 22:29:44,824 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 62 remaining) [2022-12-13 22:29:44,824 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 62 remaining) [2022-12-13 22:29:44,825 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 62 remaining) [2022-12-13 22:29:44,825 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 62 remaining) [2022-12-13 22:29:44,825 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (52 of 62 remaining) [2022-12-13 22:29:44,825 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 62 remaining) [2022-12-13 22:29:44,825 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 62 remaining) [2022-12-13 22:29:44,826 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 62 remaining) [2022-12-13 22:29:44,826 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 62 remaining) [2022-12-13 22:29:44,826 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13ASSERT_VIOLATIONARRAY_INDEX (47 of 62 remaining) [2022-12-13 22:29:44,826 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 62 remaining) [2022-12-13 22:29:44,826 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 62 remaining) [2022-12-13 22:29:44,826 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 62 remaining) [2022-12-13 22:29:44,827 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 62 remaining) [2022-12-13 22:29:44,827 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 62 remaining) [2022-12-13 22:29:44,827 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 62 remaining) [2022-12-13 22:29:44,827 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 62 remaining) [2022-12-13 22:29:44,827 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 62 remaining) [2022-12-13 22:29:44,827 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 62 remaining) [2022-12-13 22:29:44,828 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 62 remaining) [2022-12-13 22:29:44,828 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 62 remaining) [2022-12-13 22:29:44,828 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 62 remaining) [2022-12-13 22:29:44,828 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28ASSERT_VIOLATIONMEMORY_LEAK (34 of 62 remaining) [2022-12-13 22:29:44,828 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 62 remaining) [2022-12-13 22:29:44,828 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 62 remaining) [2022-12-13 22:29:44,829 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 62 remaining) [2022-12-13 22:29:44,829 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 62 remaining) [2022-12-13 22:29:44,829 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (29 of 62 remaining) [2022-12-13 22:29:44,829 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 62 remaining) [2022-12-13 22:29:44,829 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 62 remaining) [2022-12-13 22:29:44,829 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 62 remaining) [2022-12-13 22:29:44,830 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 62 remaining) [2022-12-13 22:29:44,830 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 62 remaining) [2022-12-13 22:29:44,830 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 62 remaining) [2022-12-13 22:29:44,830 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 62 remaining) [2022-12-13 22:29:44,830 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 62 remaining) [2022-12-13 22:29:44,831 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (20 of 62 remaining) [2022-12-13 22:29:44,831 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 62 remaining) [2022-12-13 22:29:44,831 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 62 remaining) [2022-12-13 22:29:44,831 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 62 remaining) [2022-12-13 22:29:44,831 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 62 remaining) [2022-12-13 22:29:44,831 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13ASSERT_VIOLATIONARRAY_INDEX (15 of 62 remaining) [2022-12-13 22:29:44,832 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 62 remaining) [2022-12-13 22:29:44,832 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 62 remaining) [2022-12-13 22:29:44,832 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 62 remaining) [2022-12-13 22:29:44,832 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 62 remaining) [2022-12-13 22:29:44,832 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 62 remaining) [2022-12-13 22:29:44,832 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 62 remaining) [2022-12-13 22:29:44,833 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 62 remaining) [2022-12-13 22:29:44,833 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 62 remaining) [2022-12-13 22:29:44,833 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 62 remaining) [2022-12-13 22:29:44,833 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 62 remaining) [2022-12-13 22:29:44,833 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 62 remaining) [2022-12-13 22:29:44,833 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 62 remaining) [2022-12-13 22:29:44,834 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28ASSERT_VIOLATIONMEMORY_LEAK (2 of 62 remaining) [2022-12-13 22:29:44,834 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 62 remaining) [2022-12-13 22:29:44,834 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 62 remaining) [2022-12-13 22:29:44,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 22:29:44,834 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-12-13 22:29:44,836 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 22:29:44,837 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-13 22:29:44,880 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 22:29:44,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 216 places, 228 transitions, 468 flow [2022-12-13 22:29:44,910 INFO L130 PetriNetUnfolder]: 19/262 cut-off events. [2022-12-13 22:29:44,910 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 22:29:44,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272 conditions, 262 events. 19/262 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 909 event pairs, 0 based on Foata normal form. 0/173 useless extension candidates. Maximal degree in co-relation 206. Up to 6 conditions per place. [2022-12-13 22:29:44,911 INFO L82 GeneralOperation]: Start removeDead. Operand has 216 places, 228 transitions, 468 flow [2022-12-13 22:29:44,914 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 216 places, 228 transitions, 468 flow [2022-12-13 22:29:44,914 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 22:29:44,914 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 216 places, 228 transitions, 468 flow [2022-12-13 22:29:44,915 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 216 places, 228 transitions, 468 flow [2022-12-13 22:29:44,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 216 places, 228 transitions, 468 flow [2022-12-13 22:29:44,941 INFO L130 PetriNetUnfolder]: 19/262 cut-off events. [2022-12-13 22:29:44,941 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 22:29:44,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272 conditions, 262 events. 19/262 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 909 event pairs, 0 based on Foata normal form. 0/173 useless extension candidates. Maximal degree in co-relation 206. Up to 6 conditions per place. [2022-12-13 22:29:44,957 INFO L119 LiptonReduction]: Number of co-enabled transitions 25004 [2022-12-13 22:29:47,850 INFO L134 LiptonReduction]: Checked pairs total: 84250 [2022-12-13 22:29:47,851 INFO L136 LiptonReduction]: Total number of compositions: 165 [2022-12-13 22:29:47,853 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 22:29:47,854 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;@72aa2e14, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 22:29:47,854 INFO L358 AbstractCegarLoop]: Starting to check reachability of 91 error locations. [2022-12-13 22:29:47,855 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2022-12-13 22:29:47,855 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 22:29:47,855 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:29:47,855 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 22:29:47,855 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2022-12-13 22:29:47,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:29:47,856 INFO L85 PathProgramCache]: Analyzing trace with hash 35708, now seen corresponding path program 1 times [2022-12-13 22:29:47,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:29:47,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931546125] [2022-12-13 22:29:47,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:29:47,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:29:47,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:29:47,908 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 22:29:47,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:29:47,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931546125] [2022-12-13 22:29:47,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931546125] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:29:47,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:29:47,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 22:29:47,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369265589] [2022-12-13 22:29:47,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:29:47,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 22:29:47,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:29:47,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 22:29:47,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 22:29:47,967 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 393 [2022-12-13 22:29:47,968 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 112 transitions, 236 flow. Second operand has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 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 22:29:47,968 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:29:47,968 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 393 [2022-12-13 22:29:47,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:29:48,924 INFO L130 PetriNetUnfolder]: 5065/9171 cut-off events. [2022-12-13 22:29:48,925 INFO L131 PetriNetUnfolder]: For 98/98 co-relation queries the response was YES. [2022-12-13 22:29:48,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17320 conditions, 9171 events. 5065/9171 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 76770 event pairs, 4687 based on Foata normal form. 0/4180 useless extension candidates. Maximal degree in co-relation 13585. Up to 8036 conditions per place. [2022-12-13 22:29:48,987 INFO L137 encePairwiseOnDemand]: 381/393 looper letters, 66 selfloop transitions, 1 changer transitions 0/96 dead transitions. [2022-12-13 22:29:48,987 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 96 transitions, 338 flow [2022-12-13 22:29:48,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 22:29:48,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 22:29:48,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 612 transitions. [2022-12-13 22:29:48,990 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5190839694656488 [2022-12-13 22:29:48,990 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 612 transitions. [2022-12-13 22:29:48,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 612 transitions. [2022-12-13 22:29:48,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:29:48,991 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 612 transitions. [2022-12-13 22:29:48,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 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 22:29:48,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 393.0) internal successors, (1572), 4 states have internal predecessors, (1572), 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 22:29:48,997 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 393.0) internal successors, (1572), 4 states have internal predecessors, (1572), 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 22:29:48,997 INFO L175 Difference]: Start difference. First operand has 110 places, 112 transitions, 236 flow. Second operand 3 states and 612 transitions. [2022-12-13 22:29:48,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 96 transitions, 338 flow [2022-12-13 22:29:48,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 96 transitions, 336 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-12-13 22:29:48,999 INFO L231 Difference]: Finished difference. Result has 99 places, 96 transitions, 204 flow [2022-12-13 22:29:48,999 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=99, PETRI_TRANSITIONS=96} [2022-12-13 22:29:48,999 INFO L288 CegarLoopForPetriNet]: 110 programPoint places, -11 predicate places. [2022-12-13 22:29:48,999 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 96 transitions, 204 flow [2022-12-13 22:29:49,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 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 22:29:49,000 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:29:49,000 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 22:29:49,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 22:29:49,000 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2022-12-13 22:29:49,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:29:49,000 INFO L85 PathProgramCache]: Analyzing trace with hash 35709, now seen corresponding path program 1 times [2022-12-13 22:29:49,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:29:49,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241017407] [2022-12-13 22:29:49,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:29:49,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:29:49,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:29:49,019 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 22:29:49,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:29:49,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241017407] [2022-12-13 22:29:49,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241017407] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:29:49,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:29:49,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 22:29:49,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602954771] [2022-12-13 22:29:49,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:29:49,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 22:29:49,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:29:49,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 22:29:49,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 22:29:49,079 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 393 [2022-12-13 22:29:49,081 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 96 transitions, 204 flow. Second operand has 3 states, 3 states have (on average 168.66666666666666) internal successors, (506), 3 states have internal predecessors, (506), 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 22:29:49,081 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:29:49,081 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 393 [2022-12-13 22:29:49,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:29:50,514 INFO L130 PetriNetUnfolder]: 7895/14709 cut-off events. [2022-12-13 22:29:50,514 INFO L131 PetriNetUnfolder]: For 173/173 co-relation queries the response was YES. [2022-12-13 22:29:50,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27858 conditions, 14709 events. 7895/14709 cut-off events. For 173/173 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 124310 event pairs, 3419 based on Foata normal form. 0/7260 useless extension candidates. Maximal degree in co-relation 27850. Up to 7272 conditions per place. [2022-12-13 22:29:50,596 INFO L137 encePairwiseOnDemand]: 386/393 looper letters, 125 selfloop transitions, 6 changer transitions 0/160 dead transitions. [2022-12-13 22:29:50,596 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 160 transitions, 599 flow [2022-12-13 22:29:50,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 22:29:50,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 22:29:50,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 636 transitions. [2022-12-13 22:29:50,598 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.539440203562341 [2022-12-13 22:29:50,598 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 636 transitions. [2022-12-13 22:29:50,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 636 transitions. [2022-12-13 22:29:50,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:29:50,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 636 transitions. [2022-12-13 22:29:50,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 212.0) internal successors, (636), 3 states have internal predecessors, (636), 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 22:29:50,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 393.0) internal successors, (1572), 4 states have internal predecessors, (1572), 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 22:29:50,601 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 393.0) internal successors, (1572), 4 states have internal predecessors, (1572), 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 22:29:50,601 INFO L175 Difference]: Start difference. First operand has 99 places, 96 transitions, 204 flow. Second operand 3 states and 636 transitions. [2022-12-13 22:29:50,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 160 transitions, 599 flow [2022-12-13 22:29:50,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 160 transitions, 598 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 22:29:50,603 INFO L231 Difference]: Finished difference. Result has 102 places, 101 transitions, 249 flow [2022-12-13 22:29:50,604 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=249, PETRI_PLACES=102, PETRI_TRANSITIONS=101} [2022-12-13 22:29:50,604 INFO L288 CegarLoopForPetriNet]: 110 programPoint places, -8 predicate places. [2022-12-13 22:29:50,604 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 101 transitions, 249 flow [2022-12-13 22:29:50,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.66666666666666) internal successors, (506), 3 states have internal predecessors, (506), 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 22:29:50,605 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:29:50,605 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:29:50,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 22:29:50,605 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2022-12-13 22:29:50,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:29:50,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1021950166, now seen corresponding path program 1 times [2022-12-13 22:29:50,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:29:50,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185298483] [2022-12-13 22:29:50,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:29:50,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:29:50,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:29:50,689 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 22:29:50,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:29:50,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185298483] [2022-12-13 22:29:50,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185298483] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:29:50,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:29:50,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 22:29:50,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310838538] [2022-12-13 22:29:50,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:29:50,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 22:29:50,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:29:50,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 22:29:50,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 22:29:50,754 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 393 [2022-12-13 22:29:50,755 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 101 transitions, 249 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 22:29:50,756 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:29:50,756 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 393 [2022-12-13 22:29:50,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:29:52,833 INFO L130 PetriNetUnfolder]: 13032/23542 cut-off events. [2022-12-13 22:29:52,833 INFO L131 PetriNetUnfolder]: For 8935/8939 co-relation queries the response was YES. [2022-12-13 22:29:52,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52468 conditions, 23542 events. 13032/23542 cut-off events. For 8935/8939 co-relation queries the response was YES. Maximal size of possible extension queue 1069. Compared 214803 event pairs, 3244 based on Foata normal form. 0/13223 useless extension candidates. Maximal degree in co-relation 52457. Up to 10673 conditions per place. [2022-12-13 22:29:52,959 INFO L137 encePairwiseOnDemand]: 376/393 looper letters, 125 selfloop transitions, 14 changer transitions 0/164 dead transitions. [2022-12-13 22:29:52,959 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 164 transitions, 684 flow [2022-12-13 22:29:52,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 22:29:52,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 22:29:52,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 619 transitions. [2022-12-13 22:29:52,963 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5250212044105174 [2022-12-13 22:29:52,963 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 619 transitions. [2022-12-13 22:29:52,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 619 transitions. [2022-12-13 22:29:52,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:29:52,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 619 transitions. [2022-12-13 22:29:52,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 206.33333333333334) internal successors, (619), 3 states have internal predecessors, (619), 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 22:29:52,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 393.0) internal successors, (1572), 4 states have internal predecessors, (1572), 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 22:29:52,971 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 393.0) internal successors, (1572), 4 states have internal predecessors, (1572), 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 22:29:52,972 INFO L175 Difference]: Start difference. First operand has 102 places, 101 transitions, 249 flow. Second operand 3 states and 619 transitions. [2022-12-13 22:29:52,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 164 transitions, 684 flow [2022-12-13 22:29:53,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 164 transitions, 664 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 22:29:53,029 INFO L231 Difference]: Finished difference. Result has 104 places, 114 transitions, 369 flow [2022-12-13 22:29:53,030 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=369, PETRI_PLACES=104, PETRI_TRANSITIONS=114} [2022-12-13 22:29:53,031 INFO L288 CegarLoopForPetriNet]: 110 programPoint places, -6 predicate places. [2022-12-13 22:29:53,031 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 114 transitions, 369 flow [2022-12-13 22:29:53,031 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 22:29:53,032 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:29:53,032 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:29:53,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 22:29:53,032 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2022-12-13 22:29:53,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:29:53,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1021950167, now seen corresponding path program 1 times [2022-12-13 22:29:53,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:29:53,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857918742] [2022-12-13 22:29:53,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:29:53,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:29:53,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:29:53,121 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 22:29:53,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:29:53,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857918742] [2022-12-13 22:29:53,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857918742] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:29:53,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:29:53,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 22:29:53,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704385815] [2022-12-13 22:29:53,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:29:53,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 22:29:53,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:29:53,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 22:29:53,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 22:29:53,252 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 393 [2022-12-13 22:29:53,253 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 114 transitions, 369 flow. Second operand has 4 states, 4 states have (on average 158.5) internal successors, (634), 4 states have internal predecessors, (634), 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 22:29:53,253 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:29:53,253 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 393 [2022-12-13 22:29:53,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:29:55,313 INFO L130 PetriNetUnfolder]: 11729/20807 cut-off events. [2022-12-13 22:29:55,313 INFO L131 PetriNetUnfolder]: For 7501/7501 co-relation queries the response was YES. [2022-12-13 22:29:55,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50123 conditions, 20807 events. 11729/20807 cut-off events. For 7501/7501 co-relation queries the response was YES. Maximal size of possible extension queue 911. Compared 182590 event pairs, 2806 based on Foata normal form. 1380/12199 useless extension candidates. Maximal degree in co-relation 50112. Up to 9482 conditions per place. [2022-12-13 22:29:55,389 INFO L137 encePairwiseOnDemand]: 375/393 looper letters, 154 selfloop transitions, 16 changer transitions 0/192 dead transitions. [2022-12-13 22:29:55,389 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 192 transitions, 903 flow [2022-12-13 22:29:55,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 22:29:55,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 22:29:55,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 798 transitions. [2022-12-13 22:29:55,391 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5076335877862596 [2022-12-13 22:29:55,391 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 798 transitions. [2022-12-13 22:29:55,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 798 transitions. [2022-12-13 22:29:55,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:29:55,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 798 transitions. [2022-12-13 22:29:55,392 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 199.5) internal successors, (798), 4 states have internal predecessors, (798), 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 22:29:55,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 393.0) internal successors, (1965), 5 states have internal predecessors, (1965), 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 22:29:55,394 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 393.0) internal successors, (1965), 5 states have internal predecessors, (1965), 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 22:29:55,395 INFO L175 Difference]: Start difference. First operand has 104 places, 114 transitions, 369 flow. Second operand 4 states and 798 transitions. [2022-12-13 22:29:55,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 192 transitions, 903 flow [2022-12-13 22:29:55,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 192 transitions, 875 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 22:29:55,408 INFO L231 Difference]: Finished difference. Result has 99 places, 108 transitions, 361 flow [2022-12-13 22:29:55,408 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=361, PETRI_PLACES=99, PETRI_TRANSITIONS=108} [2022-12-13 22:29:55,408 INFO L288 CegarLoopForPetriNet]: 110 programPoint places, -11 predicate places. [2022-12-13 22:29:55,408 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 108 transitions, 361 flow [2022-12-13 22:29:55,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 158.5) internal successors, (634), 4 states have internal predecessors, (634), 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 22:29:55,409 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:29:55,409 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:29:55,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 22:29:55,409 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err8ASSERT_VIOLATIONARRAY_INDEX === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2022-12-13 22:29:55,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:29:55,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1453362779, now seen corresponding path program 1 times [2022-12-13 22:29:55,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:29:55,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359870094] [2022-12-13 22:29:55,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:29:55,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:29:55,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:29:55,565 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 22:29:55,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:29:55,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359870094] [2022-12-13 22:29:55,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359870094] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:29:55,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:29:55,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 22:29:55,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234617476] [2022-12-13 22:29:55,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:29:55,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 22:29:55,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:29:55,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 22:29:55,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 22:29:55,643 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 393 [2022-12-13 22:29:55,644 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 108 transitions, 361 flow. Second operand has 4 states, 4 states have (on average 177.75) internal successors, (711), 4 states have internal predecessors, (711), 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 22:29:55,644 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:29:55,644 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 393 [2022-12-13 22:29:55,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:29:57,343 INFO L130 PetriNetUnfolder]: 11956/21141 cut-off events. [2022-12-13 22:29:57,343 INFO L131 PetriNetUnfolder]: For 7065/7283 co-relation queries the response was YES. [2022-12-13 22:29:57,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49939 conditions, 21141 events. 11956/21141 cut-off events. For 7065/7283 co-relation queries the response was YES. Maximal size of possible extension queue 880. Compared 179658 event pairs, 5237 based on Foata normal form. 0/10538 useless extension candidates. Maximal degree in co-relation 49928. Up to 18557 conditions per place. [2022-12-13 22:29:57,422 INFO L137 encePairwiseOnDemand]: 382/393 looper letters, 104 selfloop transitions, 8 changer transitions 0/139 dead transitions. [2022-12-13 22:29:57,422 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 139 transitions, 673 flow [2022-12-13 22:29:57,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 22:29:57,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 22:29:57,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 803 transitions. [2022-12-13 22:29:57,424 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5108142493638677 [2022-12-13 22:29:57,424 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 803 transitions. [2022-12-13 22:29:57,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 803 transitions. [2022-12-13 22:29:57,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:29:57,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 803 transitions. [2022-12-13 22:29:57,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 200.75) internal successors, (803), 4 states have internal predecessors, (803), 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 22:29:57,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 393.0) internal successors, (1965), 5 states have internal predecessors, (1965), 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 22:29:57,428 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 393.0) internal successors, (1965), 5 states have internal predecessors, (1965), 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 22:29:57,428 INFO L175 Difference]: Start difference. First operand has 99 places, 108 transitions, 361 flow. Second operand 4 states and 803 transitions. [2022-12-13 22:29:57,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 139 transitions, 673 flow [2022-12-13 22:29:57,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 139 transitions, 654 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 22:29:57,435 INFO L231 Difference]: Finished difference. Result has 102 places, 115 transitions, 407 flow [2022-12-13 22:29:57,435 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=407, PETRI_PLACES=102, PETRI_TRANSITIONS=115} [2022-12-13 22:29:57,435 INFO L288 CegarLoopForPetriNet]: 110 programPoint places, -8 predicate places. [2022-12-13 22:29:57,435 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 115 transitions, 407 flow [2022-12-13 22:29:57,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 177.75) internal successors, (711), 4 states have internal predecessors, (711), 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 22:29:57,436 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:29:57,436 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-12-13 22:29:57,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 22:29:57,436 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2022-12-13 22:29:57,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:29:57,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1124846196, now seen corresponding path program 1 times [2022-12-13 22:29:57,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:29:57,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331345553] [2022-12-13 22:29:57,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:29:57,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:29:57,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 22:29:57,445 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 22:29:57,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 22:29:57,452 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 22:29:57,452 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 22:29:57,452 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (90 of 91 remaining) [2022-12-13 22:29:57,452 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (89 of 91 remaining) [2022-12-13 22:29:57,452 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (88 of 91 remaining) [2022-12-13 22:29:57,452 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (87 of 91 remaining) [2022-12-13 22:29:57,452 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (86 of 91 remaining) [2022-12-13 22:29:57,452 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (85 of 91 remaining) [2022-12-13 22:29:57,452 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (84 of 91 remaining) [2022-12-13 22:29:57,453 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (83 of 91 remaining) [2022-12-13 22:29:57,453 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (82 of 91 remaining) [2022-12-13 22:29:57,453 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (81 of 91 remaining) [2022-12-13 22:29:57,453 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (80 of 91 remaining) [2022-12-13 22:29:57,453 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (79 of 91 remaining) [2022-12-13 22:29:57,453 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (78 of 91 remaining) [2022-12-13 22:29:57,453 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (77 of 91 remaining) [2022-12-13 22:29:57,453 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13ASSERT_VIOLATIONARRAY_INDEX (76 of 91 remaining) [2022-12-13 22:29:57,453 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (75 of 91 remaining) [2022-12-13 22:29:57,453 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (74 of 91 remaining) [2022-12-13 22:29:57,453 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (73 of 91 remaining) [2022-12-13 22:29:57,453 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (72 of 91 remaining) [2022-12-13 22:29:57,453 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (71 of 91 remaining) [2022-12-13 22:29:57,454 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (70 of 91 remaining) [2022-12-13 22:29:57,454 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (69 of 91 remaining) [2022-12-13 22:29:57,454 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 91 remaining) [2022-12-13 22:29:57,454 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 91 remaining) [2022-12-13 22:29:57,454 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 91 remaining) [2022-12-13 22:29:57,454 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 91 remaining) [2022-12-13 22:29:57,454 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 91 remaining) [2022-12-13 22:29:57,454 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28ASSERT_VIOLATIONMEMORY_LEAK (63 of 91 remaining) [2022-12-13 22:29:57,454 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 91 remaining) [2022-12-13 22:29:57,454 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 91 remaining) [2022-12-13 22:29:57,454 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 91 remaining) [2022-12-13 22:29:57,454 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 91 remaining) [2022-12-13 22:29:57,454 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (58 of 91 remaining) [2022-12-13 22:29:57,455 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 91 remaining) [2022-12-13 22:29:57,455 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 91 remaining) [2022-12-13 22:29:57,455 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 91 remaining) [2022-12-13 22:29:57,455 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 91 remaining) [2022-12-13 22:29:57,455 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 91 remaining) [2022-12-13 22:29:57,455 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 91 remaining) [2022-12-13 22:29:57,455 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 91 remaining) [2022-12-13 22:29:57,455 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 91 remaining) [2022-12-13 22:29:57,455 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (49 of 91 remaining) [2022-12-13 22:29:57,455 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 91 remaining) [2022-12-13 22:29:57,455 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 91 remaining) [2022-12-13 22:29:57,455 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 91 remaining) [2022-12-13 22:29:57,455 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 91 remaining) [2022-12-13 22:29:57,456 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13ASSERT_VIOLATIONARRAY_INDEX (44 of 91 remaining) [2022-12-13 22:29:57,456 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 91 remaining) [2022-12-13 22:29:57,456 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 91 remaining) [2022-12-13 22:29:57,456 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 91 remaining) [2022-12-13 22:29:57,456 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 91 remaining) [2022-12-13 22:29:57,456 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 91 remaining) [2022-12-13 22:29:57,456 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 91 remaining) [2022-12-13 22:29:57,456 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 91 remaining) [2022-12-13 22:29:57,456 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 91 remaining) [2022-12-13 22:29:57,456 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 91 remaining) [2022-12-13 22:29:57,456 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 91 remaining) [2022-12-13 22:29:57,456 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 91 remaining) [2022-12-13 22:29:57,456 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 91 remaining) [2022-12-13 22:29:57,457 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28ASSERT_VIOLATIONMEMORY_LEAK (31 of 91 remaining) [2022-12-13 22:29:57,457 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 91 remaining) [2022-12-13 22:29:57,457 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 91 remaining) [2022-12-13 22:29:57,457 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 91 remaining) [2022-12-13 22:29:57,457 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 91 remaining) [2022-12-13 22:29:57,457 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 91 remaining) [2022-12-13 22:29:57,457 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 91 remaining) [2022-12-13 22:29:57,457 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 91 remaining) [2022-12-13 22:29:57,457 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 91 remaining) [2022-12-13 22:29:57,457 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 91 remaining) [2022-12-13 22:29:57,457 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 91 remaining) [2022-12-13 22:29:57,457 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (20 of 91 remaining) [2022-12-13 22:29:57,458 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 91 remaining) [2022-12-13 22:29:57,458 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 91 remaining) [2022-12-13 22:29:57,458 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 91 remaining) [2022-12-13 22:29:57,458 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 91 remaining) [2022-12-13 22:29:57,458 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13ASSERT_VIOLATIONARRAY_INDEX (15 of 91 remaining) [2022-12-13 22:29:57,458 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 91 remaining) [2022-12-13 22:29:57,458 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 91 remaining) [2022-12-13 22:29:57,458 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 91 remaining) [2022-12-13 22:29:57,458 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 91 remaining) [2022-12-13 22:29:57,458 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 91 remaining) [2022-12-13 22:29:57,458 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 91 remaining) [2022-12-13 22:29:57,458 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 91 remaining) [2022-12-13 22:29:57,458 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 91 remaining) [2022-12-13 22:29:57,458 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 91 remaining) [2022-12-13 22:29:57,459 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 91 remaining) [2022-12-13 22:29:57,459 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 91 remaining) [2022-12-13 22:29:57,459 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 91 remaining) [2022-12-13 22:29:57,459 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28ASSERT_VIOLATIONMEMORY_LEAK (2 of 91 remaining) [2022-12-13 22:29:57,459 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 91 remaining) [2022-12-13 22:29:57,459 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 91 remaining) [2022-12-13 22:29:57,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 22:29:57,459 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-12-13 22:29:57,460 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 22:29:57,460 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-12-13 22:29:57,516 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 22:29:57,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 305 places, 323 transitions, 667 flow [2022-12-13 22:29:57,566 INFO L130 PetriNetUnfolder]: 28/375 cut-off events. [2022-12-13 22:29:57,567 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-13 22:29:57,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 391 conditions, 375 events. 28/375 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1576 event pairs, 0 based on Foata normal form. 0/244 useless extension candidates. Maximal degree in co-relation 300. Up to 8 conditions per place. [2022-12-13 22:29:57,569 INFO L82 GeneralOperation]: Start removeDead. Operand has 305 places, 323 transitions, 667 flow [2022-12-13 22:29:57,573 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 305 places, 323 transitions, 667 flow [2022-12-13 22:29:57,573 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 22:29:57,573 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 305 places, 323 transitions, 667 flow [2022-12-13 22:29:57,573 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 305 places, 323 transitions, 667 flow [2022-12-13 22:29:57,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 305 places, 323 transitions, 667 flow [2022-12-13 22:29:57,613 INFO L130 PetriNetUnfolder]: 28/375 cut-off events. [2022-12-13 22:29:57,613 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-13 22:29:57,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 391 conditions, 375 events. 28/375 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1576 event pairs, 0 based on Foata normal form. 0/244 useless extension candidates. Maximal degree in co-relation 300. Up to 8 conditions per place. [2022-12-13 22:29:57,630 INFO L119 LiptonReduction]: Number of co-enabled transitions 64296 [2022-12-13 22:30:01,223 INFO L134 LiptonReduction]: Checked pairs total: 188905 [2022-12-13 22:30:01,223 INFO L136 LiptonReduction]: Total number of compositions: 235 [2022-12-13 22:30:01,225 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 22:30:01,225 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;@72aa2e14, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 22:30:01,225 INFO L358 AbstractCegarLoop]: Starting to check reachability of 120 error locations. [2022-12-13 22:30:01,226 INFO L130 PetriNetUnfolder]: 0/3 cut-off events. [2022-12-13 22:30:01,226 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 22:30:01,226 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:30:01,226 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 22:30:01,226 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 117 more)] === [2022-12-13 22:30:01,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:30:01,226 INFO L85 PathProgramCache]: Analyzing trace with hash 56620, now seen corresponding path program 1 times [2022-12-13 22:30:01,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:30:01,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249265875] [2022-12-13 22:30:01,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:30:01,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:30:01,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:30:01,242 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 22:30:01,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:30:01,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249265875] [2022-12-13 22:30:01,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249265875] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:30:01,243 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:30:01,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 22:30:01,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237574647] [2022-12-13 22:30:01,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:30:01,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 22:30:01,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:30:01,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 22:30:01,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 22:30:01,331 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 558 [2022-12-13 22:30:01,331 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 161 transitions, 343 flow. Second operand has 3 states, 3 states have (on average 237.66666666666666) internal successors, (713), 3 states have internal predecessors, (713), 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 22:30:01,332 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:30:01,332 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 558 [2022-12-13 22:30:01,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:31:31,263 INFO L130 PetriNetUnfolder]: 781186/1139506 cut-off events. [2022-12-13 22:31:31,263 INFO L131 PetriNetUnfolder]: For 38195/38195 co-relation queries the response was YES. [2022-12-13 22:31:32,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2236770 conditions, 1139506 events. 781186/1139506 cut-off events. For 38195/38195 co-relation queries the response was YES. Maximal size of possible extension queue 31471. Compared 11290639 event pairs, 316868 based on Foata normal form. 0/488507 useless extension candidates. Maximal degree in co-relation 1373816. Up to 612227 conditions per place. [2022-12-13 22:31:37,031 INFO L137 encePairwiseOnDemand]: 536/558 looper letters, 209 selfloop transitions, 8 changer transitions 0/249 dead transitions. [2022-12-13 22:31:37,031 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 249 transitions, 965 flow [2022-12-13 22:31:37,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 22:31:37,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 22:31:37,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 955 transitions. [2022-12-13 22:31:37,033 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.570489844683393 [2022-12-13 22:31:37,033 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 955 transitions. [2022-12-13 22:31:37,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 955 transitions. [2022-12-13 22:31:37,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:31:37,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 955 transitions. [2022-12-13 22:31:37,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 318.3333333333333) internal successors, (955), 3 states have internal predecessors, (955), 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 22:31:37,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 558.0) internal successors, (2232), 4 states have internal predecessors, (2232), 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 22:31:37,042 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 558.0) internal successors, (2232), 4 states have internal predecessors, (2232), 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 22:31:37,043 INFO L175 Difference]: Start difference. First operand has 159 places, 161 transitions, 343 flow. Second operand 3 states and 955 transitions. [2022-12-13 22:31:37,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 249 transitions, 965 flow [2022-12-13 22:31:37,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 249 transitions, 957 flow, removed 4 selfloop flow, removed 0 redundant places. [2022-12-13 22:31:37,090 INFO L231 Difference]: Finished difference. Result has 147 places, 149 transitions, 361 flow [2022-12-13 22:31:37,090 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=558, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=361, PETRI_PLACES=147, PETRI_TRANSITIONS=149} [2022-12-13 22:31:37,091 INFO L288 CegarLoopForPetriNet]: 159 programPoint places, -12 predicate places. [2022-12-13 22:31:37,091 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 149 transitions, 361 flow [2022-12-13 22:31:37,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 237.66666666666666) internal successors, (713), 3 states have internal predecessors, (713), 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 22:31:37,091 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:31:37,091 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 22:31:37,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 22:31:37,092 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 117 more)] === [2022-12-13 22:31:37,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:31:37,092 INFO L85 PathProgramCache]: Analyzing trace with hash 56621, now seen corresponding path program 1 times [2022-12-13 22:31:37,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:31:37,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974324518] [2022-12-13 22:31:37,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:31:37,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:31:37,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:31:37,117 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 22:31:37,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:31:37,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974324518] [2022-12-13 22:31:37,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974324518] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:31:37,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:31:37,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 22:31:37,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614014389] [2022-12-13 22:31:37,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:31:37,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 22:31:37,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:31:37,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 22:31:37,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 22:31:37,201 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 558 [2022-12-13 22:31:37,202 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 149 transitions, 361 flow. Second operand has 3 states, 3 states have (on average 251.66666666666666) internal successors, (755), 3 states have internal predecessors, (755), 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 22:31:37,203 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:31:37,203 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 558 [2022-12-13 22:31:37,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:32:39,770 INFO L130 PetriNetUnfolder]: 541228/787333 cut-off events. [2022-12-13 22:32:39,770 INFO L131 PetriNetUnfolder]: For 225408/225408 co-relation queries the response was YES. [2022-12-13 22:32:40,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1752554 conditions, 787333 events. 541228/787333 cut-off events. For 225408/225408 co-relation queries the response was YES. Maximal size of possible extension queue 19936. Compared 7427166 event pairs, 461501 based on Foata normal form. 78307/487709 useless extension candidates. Maximal degree in co-relation 1571574. Up to 744741 conditions per place. [2022-12-13 22:32:44,025 INFO L137 encePairwiseOnDemand]: 556/558 looper letters, 115 selfloop transitions, 1 changer transitions 0/148 dead transitions. [2022-12-13 22:32:44,026 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 148 transitions, 591 flow [2022-12-13 22:32:44,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 22:32:44,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 22:32:44,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 863 transitions. [2022-12-13 22:32:44,028 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.515531660692951 [2022-12-13 22:32:44,028 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 863 transitions. [2022-12-13 22:32:44,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 863 transitions. [2022-12-13 22:32:44,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:32:44,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 863 transitions. [2022-12-13 22:32:44,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 287.6666666666667) internal successors, (863), 3 states have internal predecessors, (863), 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 22:32:44,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 558.0) internal successors, (2232), 4 states have internal predecessors, (2232), 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 22:32:44,032 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 558.0) internal successors, (2232), 4 states have internal predecessors, (2232), 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 22:32:44,032 INFO L175 Difference]: Start difference. First operand has 147 places, 149 transitions, 361 flow. Second operand 3 states and 863 transitions. [2022-12-13 22:32:44,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 148 transitions, 591 flow [2022-12-13 22:32:46,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 148 transitions, 575 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 22:32:46,993 INFO L231 Difference]: Finished difference. Result has 146 places, 148 transitions, 345 flow [2022-12-13 22:32:46,994 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=558, PETRI_DIFFERENCE_MINUEND_FLOW=343, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=345, PETRI_PLACES=146, PETRI_TRANSITIONS=148} [2022-12-13 22:32:46,994 INFO L288 CegarLoopForPetriNet]: 159 programPoint places, -13 predicate places. [2022-12-13 22:32:46,994 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 148 transitions, 345 flow [2022-12-13 22:32:46,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 251.66666666666666) internal successors, (755), 3 states have internal predecessors, (755), 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 22:32:46,995 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:32:46,995 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:32:46,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 22:32:46,995 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 117 more)] === [2022-12-13 22:32:46,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:32:46,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1027998064, now seen corresponding path program 1 times [2022-12-13 22:32:46,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:32:46,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569338478] [2022-12-13 22:32:46,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:32:46,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:32:47,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:32:47,016 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 22:32:47,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:32:47,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569338478] [2022-12-13 22:32:47,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569338478] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:32:47,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:32:47,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 22:32:47,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889685467] [2022-12-13 22:32:47,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:32:47,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 22:32:47,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:32:47,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 22:32:47,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 22:32:47,020 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 558 [2022-12-13 22:32:47,021 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 148 transitions, 345 flow. Second operand has 3 states, 3 states have (on average 255.66666666666666) internal successors, (767), 3 states have internal predecessors, (767), 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 22:32:47,021 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:32:47,021 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 558 [2022-12-13 22:32:47,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:33:47,647 INFO L130 PetriNetUnfolder]: 541579/790249 cut-off events. [2022-12-13 22:33:47,647 INFO L131 PetriNetUnfolder]: For 95218/95218 co-relation queries the response was YES. [2022-12-13 22:33:48,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1701707 conditions, 790249 events. 541579/790249 cut-off events. For 95218/95218 co-relation queries the response was YES. Maximal size of possible extension queue 19859. Compared 7506826 event pairs, 376502 based on Foata normal form. 0/369169 useless extension candidates. Maximal degree in co-relation 1701696. Up to 744791 conditions per place. [2022-12-13 22:33:51,676 INFO L137 encePairwiseOnDemand]: 548/558 looper letters, 127 selfloop transitions, 4 changer transitions 0/163 dead transitions. [2022-12-13 22:33:51,676 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 163 transitions, 649 flow [2022-12-13 22:33:51,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 22:33:51,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 22:33:51,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 892 transitions. [2022-12-13 22:33:51,679 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5328554360812425 [2022-12-13 22:33:51,679 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 892 transitions. [2022-12-13 22:33:51,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 892 transitions. [2022-12-13 22:33:51,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:33:51,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 892 transitions. [2022-12-13 22:33:51,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 297.3333333333333) internal successors, (892), 3 states have internal predecessors, (892), 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 22:33:51,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 558.0) internal successors, (2232), 4 states have internal predecessors, (2232), 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 22:33:51,686 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 558.0) internal successors, (2232), 4 states have internal predecessors, (2232), 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 22:33:51,687 INFO L175 Difference]: Start difference. First operand has 146 places, 148 transitions, 345 flow. Second operand 3 states and 892 transitions. [2022-12-13 22:33:51,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 163 transitions, 649 flow [2022-12-13 22:33:51,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 163 transitions, 648 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 22:33:51,714 INFO L231 Difference]: Finished difference. Result has 148 places, 151 transitions, 380 flow [2022-12-13 22:33:51,714 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=558, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=380, PETRI_PLACES=148, PETRI_TRANSITIONS=151} [2022-12-13 22:33:51,714 INFO L288 CegarLoopForPetriNet]: 159 programPoint places, -11 predicate places. [2022-12-13 22:33:51,715 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 151 transitions, 380 flow [2022-12-13 22:33:51,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 255.66666666666666) internal successors, (767), 3 states have internal predecessors, (767), 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 22:33:51,715 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:33:51,715 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:33:51,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 22:33:51,716 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 117 more)] === [2022-12-13 22:33:51,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:33:51,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1027998066, now seen corresponding path program 1 times [2022-12-13 22:33:51,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:33:51,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139160890] [2022-12-13 22:33:51,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:33:51,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:33:51,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:33:51,772 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 22:33:51,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:33:51,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139160890] [2022-12-13 22:33:51,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139160890] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:33:51,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:33:51,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 22:33:51,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380895849] [2022-12-13 22:33:51,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:33:51,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 22:33:51,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:33:51,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 22:33:51,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 22:33:51,868 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 558 [2022-12-13 22:33:51,869 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 151 transitions, 380 flow. Second operand has 3 states, 3 states have (on average 231.66666666666666) internal successors, (695), 3 states have internal predecessors, (695), 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 22:33:51,869 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:33:51,869 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 558 [2022-12-13 22:33:51,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:35:54,092 INFO L130 PetriNetUnfolder]: 966845/1404227 cut-off events. [2022-12-13 22:35:54,092 INFO L131 PetriNetUnfolder]: For 215224/215295 co-relation queries the response was YES. [2022-12-13 22:35:56,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3114380 conditions, 1404227 events. 966845/1404227 cut-off events. For 215224/215295 co-relation queries the response was YES. Maximal size of possible extension queue 39032. Compared 14182372 event pairs, 400043 based on Foata normal form. 0/684318 useless extension candidates. Maximal degree in co-relation 3114367. Up to 749299 conditions per place. [2022-12-13 22:36:01,882 INFO L137 encePairwiseOnDemand]: 539/558 looper letters, 210 selfloop transitions, 18 changer transitions 0/258 dead transitions. [2022-12-13 22:36:01,882 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 258 transitions, 1108 flow [2022-12-13 22:36:01,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 22:36:01,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 22:36:01,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 906 transitions. [2022-12-13 22:36:01,884 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5412186379928315 [2022-12-13 22:36:01,884 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 906 transitions. [2022-12-13 22:36:01,884 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 906 transitions. [2022-12-13 22:36:01,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:36:01,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 906 transitions. [2022-12-13 22:36:01,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 302.0) internal successors, (906), 3 states have internal predecessors, (906), 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 22:36:01,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 558.0) internal successors, (2232), 4 states have internal predecessors, (2232), 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 22:36:01,888 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 558.0) internal successors, (2232), 4 states have internal predecessors, (2232), 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 22:36:01,888 INFO L175 Difference]: Start difference. First operand has 148 places, 151 transitions, 380 flow. Second operand 3 states and 906 transitions. [2022-12-13 22:36:01,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 258 transitions, 1108 flow [2022-12-13 22:36:01,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 258 transitions, 1102 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 22:36:01,900 INFO L231 Difference]: Finished difference. Result has 151 places, 168 transitions, 550 flow [2022-12-13 22:36:01,900 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=558, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=550, PETRI_PLACES=151, PETRI_TRANSITIONS=168} [2022-12-13 22:36:01,901 INFO L288 CegarLoopForPetriNet]: 159 programPoint places, -8 predicate places. [2022-12-13 22:36:01,901 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 168 transitions, 550 flow [2022-12-13 22:36:01,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 231.66666666666666) internal successors, (695), 3 states have internal predecessors, (695), 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 22:36:01,901 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:36:01,901 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:36:01,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-13 22:36:01,901 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 117 more)] === [2022-12-13 22:36:01,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:36:01,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1027998065, now seen corresponding path program 1 times [2022-12-13 22:36:01,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:36:01,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114173073] [2022-12-13 22:36:01,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:36:01,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:36:01,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:36:01,960 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 22:36:01,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:36:01,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114173073] [2022-12-13 22:36:01,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114173073] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:36:01,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:36:01,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 22:36:01,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251644819] [2022-12-13 22:36:01,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:36:01,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 22:36:01,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:36:01,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 22:36:01,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 22:36:02,102 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 558 [2022-12-13 22:36:02,103 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 168 transitions, 550 flow. Second operand has 4 states, 4 states have (on average 227.5) internal successors, (910), 4 states have internal predecessors, (910), 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 22:36:02,103 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:36:02,103 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 558 [2022-12-13 22:36:02,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand