./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-ext/26_stack_cas.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_7c96f36c-01b2-4b25-83d2-d14720766143/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c96f36c-01b2-4b25-83d2-d14720766143/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_7c96f36c-01b2-4b25-83d2-d14720766143/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c96f36c-01b2-4b25-83d2-d14720766143/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-ext/26_stack_cas.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c96f36c-01b2-4b25-83d2-d14720766143/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_7c96f36c-01b2-4b25-83d2-d14720766143/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 fa97ad6141e9aa8818b694f4968e766701fe7261f516cd86f7a15e5cf1a3d14d --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 20:40:24,362 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 20:40:24,363 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 20:40:24,376 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 20:40:24,376 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 20:40:24,377 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 20:40:24,378 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 20:40:24,379 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 20:40:24,380 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 20:40:24,380 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 20:40:24,381 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 20:40:24,382 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 20:40:24,382 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 20:40:24,382 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 20:40:24,383 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 20:40:24,384 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 20:40:24,384 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 20:40:24,385 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 20:40:24,386 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 20:40:24,387 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 20:40:24,388 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 20:40:24,389 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 20:40:24,390 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 20:40:24,390 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 20:40:24,393 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 20:40:24,393 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 20:40:24,393 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 20:40:24,394 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 20:40:24,394 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 20:40:24,395 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 20:40:24,395 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 20:40:24,395 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 20:40:24,396 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 20:40:24,396 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 20:40:24,397 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 20:40:24,397 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 20:40:24,398 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 20:40:24,398 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 20:40:24,398 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 20:40:24,398 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 20:40:24,399 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 20:40:24,400 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c96f36c-01b2-4b25-83d2-d14720766143/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 20:40:24,414 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 20:40:24,414 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 20:40:24,415 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 20:40:24,415 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 20:40:24,415 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 20:40:24,415 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 20:40:24,416 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 20:40:24,416 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 20:40:24,420 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 20:40:24,421 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 20:40:24,421 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 20:40:24,422 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 20:40:24,422 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 20:40:24,422 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 20:40:24,422 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 20:40:24,422 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 20:40:24,423 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 20:40:24,423 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 20:40:24,423 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 20:40:24,423 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 20:40:24,423 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 20:40:24,423 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 20:40:24,424 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 20:40:24,424 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 20:40:24,424 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 20:40:24,424 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 20:40:24,424 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 20:40:24,424 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 20:40:24,424 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 20:40:24,425 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 20:40:24,425 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 20:40:24,425 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 20:40:24,425 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 20:40:24,425 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 20:40:24,425 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_7c96f36c-01b2-4b25-83d2-d14720766143/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c96f36c-01b2-4b25-83d2-d14720766143/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fa97ad6141e9aa8818b694f4968e766701fe7261f516cd86f7a15e5cf1a3d14d [2022-12-13 20:40:24,611 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 20:40:24,631 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 20:40:24,633 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 20:40:24,634 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 20:40:24,634 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 20:40:24,635 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c96f36c-01b2-4b25-83d2-d14720766143/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/pthread-ext/26_stack_cas.i [2022-12-13 20:40:27,220 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 20:40:27,388 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 20:40:27,388 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c96f36c-01b2-4b25-83d2-d14720766143/sv-benchmarks/c/pthread-ext/26_stack_cas.i [2022-12-13 20:40:27,396 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c96f36c-01b2-4b25-83d2-d14720766143/bin/uautomizer-uyxdKDjOR8/data/cd0fcd7ab/556793559a074d4a9c9ada57e5164b13/FLAG9d7aeebd6 [2022-12-13 20:40:27,407 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c96f36c-01b2-4b25-83d2-d14720766143/bin/uautomizer-uyxdKDjOR8/data/cd0fcd7ab/556793559a074d4a9c9ada57e5164b13 [2022-12-13 20:40:27,409 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 20:40:27,410 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 20:40:27,411 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 20:40:27,411 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 20:40:27,414 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 20:40:27,415 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 08:40:27" (1/1) ... [2022-12-13 20:40:27,415 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47525c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:40:27, skipping insertion in model container [2022-12-13 20:40:27,416 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 08:40:27" (1/1) ... [2022-12-13 20:40:27,423 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 20:40:27,460 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 20:40:27,679 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_7c96f36c-01b2-4b25-83d2-d14720766143/sv-benchmarks/c/pthread-ext/26_stack_cas.i[31152,31165] [2022-12-13 20:40:27,686 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 20:40:27,695 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 20:40:27,721 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_7c96f36c-01b2-4b25-83d2-d14720766143/sv-benchmarks/c/pthread-ext/26_stack_cas.i[31152,31165] [2022-12-13 20:40:27,724 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 20:40:27,745 INFO L208 MainTranslator]: Completed translation [2022-12-13 20:40:27,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:40:27 WrapperNode [2022-12-13 20:40:27,745 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 20:40:27,746 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 20:40:27,746 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 20:40:27,746 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 20:40:27,751 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:40:27" (1/1) ... [2022-12-13 20:40:27,761 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:40:27" (1/1) ... [2022-12-13 20:40:27,778 INFO L138 Inliner]: procedures = 177, calls = 47, calls flagged for inlining = 16, calls inlined = 19, statements flattened = 189 [2022-12-13 20:40:27,778 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 20:40:27,779 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 20:40:27,779 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 20:40:27,779 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 20:40:27,785 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:40:27" (1/1) ... [2022-12-13 20:40:27,786 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:40:27" (1/1) ... [2022-12-13 20:40:27,788 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:40:27" (1/1) ... [2022-12-13 20:40:27,788 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:40:27" (1/1) ... [2022-12-13 20:40:27,792 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:40:27" (1/1) ... [2022-12-13 20:40:27,794 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:40:27" (1/1) ... [2022-12-13 20:40:27,796 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:40:27" (1/1) ... [2022-12-13 20:40:27,797 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:40:27" (1/1) ... [2022-12-13 20:40:27,799 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 20:40:27,799 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 20:40:27,799 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 20:40:27,799 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 20:40:27,800 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:40:27" (1/1) ... [2022-12-13 20:40:27,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 20:40:27,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c96f36c-01b2-4b25-83d2-d14720766143/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:40:27,826 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c96f36c-01b2-4b25-83d2-d14720766143/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 20:40:27,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c96f36c-01b2-4b25-83d2-d14720766143/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 20:40:27,859 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 20:40:27,860 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-12-13 20:40:27,860 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-12-13 20:40:27,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 20:40:27,860 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 20:40:27,860 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 20:40:27,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 20:40:27,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 20:40:27,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 20:40:27,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 20:40:27,862 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 20:40:27,966 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 20:40:27,968 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 20:40:28,278 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 20:40:28,480 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 20:40:28,480 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-13 20:40:28,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 08:40:28 BoogieIcfgContainer [2022-12-13 20:40:28,483 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 20:40:28,485 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 20:40:28,485 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 20:40:28,488 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 20:40:28,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 08:40:27" (1/3) ... [2022-12-13 20:40:28,489 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b2811cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 08:40:28, skipping insertion in model container [2022-12-13 20:40:28,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:40:27" (2/3) ... [2022-12-13 20:40:28,490 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b2811cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 08:40:28, skipping insertion in model container [2022-12-13 20:40:28,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 08:40:28" (3/3) ... [2022-12-13 20:40:28,491 INFO L112 eAbstractionObserver]: Analyzing ICFG 26_stack_cas.i [2022-12-13 20:40:28,510 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 20:40:28,510 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 42 error locations. [2022-12-13 20:40:28,510 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 20:40:28,580 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 20:40:28,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 170 transitions, 345 flow [2022-12-13 20:40:28,650 INFO L130 PetriNetUnfolder]: 11/186 cut-off events. [2022-12-13 20:40:28,650 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 20:40:28,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191 conditions, 186 events. 11/186 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 378 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 142. Up to 4 conditions per place. [2022-12-13 20:40:28,656 INFO L82 GeneralOperation]: Start removeDead. Operand has 163 places, 170 transitions, 345 flow [2022-12-13 20:40:28,660 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 163 places, 170 transitions, 345 flow [2022-12-13 20:40:28,663 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 20:40:28,670 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 163 places, 170 transitions, 345 flow [2022-12-13 20:40:28,672 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 163 places, 170 transitions, 345 flow [2022-12-13 20:40:28,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 170 transitions, 345 flow [2022-12-13 20:40:28,722 INFO L130 PetriNetUnfolder]: 11/186 cut-off events. [2022-12-13 20:40:28,722 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 20:40:28,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191 conditions, 186 events. 11/186 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 378 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 142. Up to 4 conditions per place. [2022-12-13 20:40:28,726 INFO L119 LiptonReduction]: Number of co-enabled transitions 4712 [2022-12-13 20:40:33,760 INFO L134 LiptonReduction]: Checked pairs total: 10350 [2022-12-13 20:40:33,760 INFO L136 LiptonReduction]: Total number of compositions: 178 [2022-12-13 20:40:33,770 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 20:40:33,774 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;@57b10461, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 20:40:33,774 INFO L358 AbstractCegarLoop]: Starting to check reachability of 82 error locations. [2022-12-13 20:40:33,776 INFO L130 PetriNetUnfolder]: 0/3 cut-off events. [2022-12-13 20:40:33,776 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 20:40:33,776 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:40:33,777 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 20:40:33,777 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2022-12-13 20:40:33,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:40:33,780 INFO L85 PathProgramCache]: Analyzing trace with hash 33840, now seen corresponding path program 1 times [2022-12-13 20:40:33,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:40:33,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634699745] [2022-12-13 20:40:33,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:40:33,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:40:33,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:33,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:40:33,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:40:33,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634699745] [2022-12-13 20:40:33,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634699745] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:40:33,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:40:33,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 20:40:33,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221743257] [2022-12-13 20:40:33,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:40:33,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 20:40:33,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:40:33,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 20:40:33,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 20:40:34,016 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 348 [2022-12-13 20:40:34,019 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 69 transitions, 143 flow. Second operand has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:40:34,019 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:40:34,019 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 348 [2022-12-13 20:40:34,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:40:34,188 INFO L130 PetriNetUnfolder]: 223/507 cut-off events. [2022-12-13 20:40:34,188 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 20:40:34,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1010 conditions, 507 events. 223/507 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2287 event pairs, 118 based on Foata normal form. 0/237 useless extension candidates. Maximal degree in co-relation 977. Up to 262 conditions per place. [2022-12-13 20:40:34,191 INFO L137 encePairwiseOnDemand]: 324/348 looper letters, 72 selfloop transitions, 4 changer transitions 0/78 dead transitions. [2022-12-13 20:40:34,192 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 78 transitions, 313 flow [2022-12-13 20:40:34,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 20:40:34,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 20:40:34,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 459 transitions. [2022-12-13 20:40:34,202 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4396551724137931 [2022-12-13 20:40:34,203 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 459 transitions. [2022-12-13 20:40:34,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 459 transitions. [2022-12-13 20:40:34,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:40:34,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 459 transitions. [2022-12-13 20:40:34,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:40:34,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:40:34,213 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:40:34,214 INFO L175 Difference]: Start difference. First operand has 66 places, 69 transitions, 143 flow. Second operand 3 states and 459 transitions. [2022-12-13 20:40:34,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 78 transitions, 313 flow [2022-12-13 20:40:34,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 78 transitions, 313 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 20:40:34,218 INFO L231 Difference]: Finished difference. Result has 50 places, 50 transitions, 129 flow [2022-12-13 20:40:34,219 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=50, PETRI_TRANSITIONS=50} [2022-12-13 20:40:34,222 INFO L288 CegarLoopForPetriNet]: 66 programPoint places, -16 predicate places. [2022-12-13 20:40:34,222 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 50 transitions, 129 flow [2022-12-13 20:40:34,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:40:34,223 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:40:34,223 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 20:40:34,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 20:40:34,223 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2022-12-13 20:40:34,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:40:34,224 INFO L85 PathProgramCache]: Analyzing trace with hash 33841, now seen corresponding path program 1 times [2022-12-13 20:40:34,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:40:34,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956759401] [2022-12-13 20:40:34,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:40:34,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:40:34,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:34,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:40:34,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:40:34,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956759401] [2022-12-13 20:40:34,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956759401] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:40:34,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:40:34,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 20:40:34,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202320076] [2022-12-13 20:40:34,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:40:34,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 20:40:34,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:40:34,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 20:40:34,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 20:40:34,330 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 348 [2022-12-13 20:40:34,331 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 50 transitions, 129 flow. Second operand has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:40:34,331 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:40:34,331 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 348 [2022-12-13 20:40:34,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:40:34,419 INFO L130 PetriNetUnfolder]: 160/382 cut-off events. [2022-12-13 20:40:34,419 INFO L131 PetriNetUnfolder]: For 132/132 co-relation queries the response was YES. [2022-12-13 20:40:34,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 898 conditions, 382 events. 160/382 cut-off events. For 132/132 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1623 event pairs, 116 based on Foata normal form. 59/297 useless extension candidates. Maximal degree in co-relation 862. Up to 366 conditions per place. [2022-12-13 20:40:34,421 INFO L137 encePairwiseOnDemand]: 346/348 looper letters, 46 selfloop transitions, 1 changer transitions 0/49 dead transitions. [2022-12-13 20:40:34,421 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 49 transitions, 221 flow [2022-12-13 20:40:34,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 20:40:34,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 20:40:34,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 408 transitions. [2022-12-13 20:40:34,423 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39080459770114945 [2022-12-13 20:40:34,423 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 408 transitions. [2022-12-13 20:40:34,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 408 transitions. [2022-12-13 20:40:34,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:40:34,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 408 transitions. [2022-12-13 20:40:34,424 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:40:34,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:40:34,426 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:40:34,426 INFO L175 Difference]: Start difference. First operand has 50 places, 50 transitions, 129 flow. Second operand 3 states and 408 transitions. [2022-12-13 20:40:34,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 49 transitions, 221 flow [2022-12-13 20:40:34,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 49 transitions, 213 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 20:40:34,428 INFO L231 Difference]: Finished difference. Result has 49 places, 49 transitions, 121 flow [2022-12-13 20:40:34,429 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=121, PETRI_PLACES=49, PETRI_TRANSITIONS=49} [2022-12-13 20:40:34,429 INFO L288 CegarLoopForPetriNet]: 66 programPoint places, -17 predicate places. [2022-12-13 20:40:34,429 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 49 transitions, 121 flow [2022-12-13 20:40:34,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:40:34,434 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:40:34,434 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 20:40:34,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 20:40:34,434 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2022-12-13 20:40:34,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:40:34,435 INFO L85 PathProgramCache]: Analyzing trace with hash 32546518, now seen corresponding path program 1 times [2022-12-13 20:40:34,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:40:34,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835990621] [2022-12-13 20:40:34,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:40:34,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:40:34,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:34,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:40:34,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:40:34,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835990621] [2022-12-13 20:40:34,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835990621] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:40:34,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:40:34,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 20:40:34,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994351227] [2022-12-13 20:40:34,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:40:34,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 20:40:34,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:40:34,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 20:40:34,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 20:40:34,616 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 348 [2022-12-13 20:40:34,616 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 49 transitions, 121 flow. Second operand has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:40:34,616 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:40:34,616 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 348 [2022-12-13 20:40:34,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:40:34,768 INFO L130 PetriNetUnfolder]: 158/398 cut-off events. [2022-12-13 20:40:34,768 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-12-13 20:40:34,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 896 conditions, 398 events. 158/398 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1796 event pairs, 108 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 887. Up to 225 conditions per place. [2022-12-13 20:40:34,771 INFO L137 encePairwiseOnDemand]: 343/348 looper letters, 67 selfloop transitions, 3 changer transitions 0/72 dead transitions. [2022-12-13 20:40:34,771 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 72 transitions, 311 flow [2022-12-13 20:40:34,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 20:40:34,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 20:40:34,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 415 transitions. [2022-12-13 20:40:34,773 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3975095785440613 [2022-12-13 20:40:34,774 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 415 transitions. [2022-12-13 20:40:34,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 415 transitions. [2022-12-13 20:40:34,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:40:34,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 415 transitions. [2022-12-13 20:40:34,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:40:34,778 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:40:34,779 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:40:34,779 INFO L175 Difference]: Start difference. First operand has 49 places, 49 transitions, 121 flow. Second operand 3 states and 415 transitions. [2022-12-13 20:40:34,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 72 transitions, 311 flow [2022-12-13 20:40:34,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 72 transitions, 310 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 20:40:34,781 INFO L231 Difference]: Finished difference. Result has 49 places, 49 transitions, 137 flow [2022-12-13 20:40:34,781 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=137, PETRI_PLACES=49, PETRI_TRANSITIONS=49} [2022-12-13 20:40:34,782 INFO L288 CegarLoopForPetriNet]: 66 programPoint places, -17 predicate places. [2022-12-13 20:40:34,782 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 49 transitions, 137 flow [2022-12-13 20:40:34,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:40:34,783 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:40:34,783 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 20:40:34,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 20:40:34,783 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2022-12-13 20:40:34,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:40:34,784 INFO L85 PathProgramCache]: Analyzing trace with hash 32546519, now seen corresponding path program 1 times [2022-12-13 20:40:34,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:40:34,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543571268] [2022-12-13 20:40:34,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:40:34,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:40:34,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:34,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:40:34,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:40:34,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543571268] [2022-12-13 20:40:34,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543571268] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:40:34,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:40:34,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 20:40:34,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341441247] [2022-12-13 20:40:34,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:40:34,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 20:40:34,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:40:34,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 20:40:34,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 20:40:34,941 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 348 [2022-12-13 20:40:34,942 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 49 transitions, 137 flow. Second operand has 4 states, 4 states have (on average 123.0) internal successors, (492), 4 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:40:34,942 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:40:34,942 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 348 [2022-12-13 20:40:34,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:40:35,050 INFO L130 PetriNetUnfolder]: 154/405 cut-off events. [2022-12-13 20:40:35,050 INFO L131 PetriNetUnfolder]: For 57/57 co-relation queries the response was YES. [2022-12-13 20:40:35,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 926 conditions, 405 events. 154/405 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1897 event pairs, 130 based on Foata normal form. 0/232 useless extension candidates. Maximal degree in co-relation 915. Up to 370 conditions per place. [2022-12-13 20:40:35,052 INFO L137 encePairwiseOnDemand]: 345/348 looper letters, 44 selfloop transitions, 1 changer transitions 0/47 dead transitions. [2022-12-13 20:40:35,052 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 47 transitions, 223 flow [2022-12-13 20:40:35,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 20:40:35,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 20:40:35,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 408 transitions. [2022-12-13 20:40:35,054 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39080459770114945 [2022-12-13 20:40:35,054 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 408 transitions. [2022-12-13 20:40:35,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 408 transitions. [2022-12-13 20:40:35,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:40:35,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 408 transitions. [2022-12-13 20:40:35,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:40:35,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:40:35,058 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:40:35,058 INFO L175 Difference]: Start difference. First operand has 49 places, 49 transitions, 137 flow. Second operand 3 states and 408 transitions. [2022-12-13 20:40:35,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 47 transitions, 223 flow [2022-12-13 20:40:35,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 47 transitions, 220 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 20:40:35,060 INFO L231 Difference]: Finished difference. Result has 48 places, 47 transitions, 132 flow [2022-12-13 20:40:35,060 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=48, PETRI_TRANSITIONS=47} [2022-12-13 20:40:35,061 INFO L288 CegarLoopForPetriNet]: 66 programPoint places, -18 predicate places. [2022-12-13 20:40:35,061 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 47 transitions, 132 flow [2022-12-13 20:40:35,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 123.0) internal successors, (492), 4 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:40:35,062 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:40:35,062 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 20:40:35,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 20:40:35,062 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2022-12-13 20:40:35,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:40:35,063 INFO L85 PathProgramCache]: Analyzing trace with hash 32546658, now seen corresponding path program 1 times [2022-12-13 20:40:35,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:40:35,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196155269] [2022-12-13 20:40:35,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:40:35,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:40:35,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:35,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:40:35,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:40:35,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196155269] [2022-12-13 20:40:35,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196155269] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:40:35,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:40:35,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 20:40:35,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394670370] [2022-12-13 20:40:35,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:40:35,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 20:40:35,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:40:35,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 20:40:35,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 20:40:35,182 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 348 [2022-12-13 20:40:35,182 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 47 transitions, 132 flow. Second operand has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:40:35,183 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:40:35,183 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 348 [2022-12-13 20:40:35,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:40:35,269 INFO L130 PetriNetUnfolder]: 144/376 cut-off events. [2022-12-13 20:40:35,269 INFO L131 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2022-12-13 20:40:35,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 857 conditions, 376 events. 144/376 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1724 event pairs, 120 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 845. Up to 344 conditions per place. [2022-12-13 20:40:35,271 INFO L137 encePairwiseOnDemand]: 344/348 looper letters, 41 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2022-12-13 20:40:35,271 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 44 transitions, 210 flow [2022-12-13 20:40:35,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 20:40:35,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 20:40:35,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 397 transitions. [2022-12-13 20:40:35,272 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38026819923371646 [2022-12-13 20:40:35,272 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 397 transitions. [2022-12-13 20:40:35,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 397 transitions. [2022-12-13 20:40:35,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:40:35,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 397 transitions. [2022-12-13 20:40:35,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:40:35,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:40:35,275 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:40:35,275 INFO L175 Difference]: Start difference. First operand has 48 places, 47 transitions, 132 flow. Second operand 3 states and 397 transitions. [2022-12-13 20:40:35,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 44 transitions, 210 flow [2022-12-13 20:40:35,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 44 transitions, 209 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 20:40:35,276 INFO L231 Difference]: Finished difference. Result has 46 places, 44 transitions, 127 flow [2022-12-13 20:40:35,276 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=44, 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=127, PETRI_PLACES=46, PETRI_TRANSITIONS=44} [2022-12-13 20:40:35,276 INFO L288 CegarLoopForPetriNet]: 66 programPoint places, -20 predicate places. [2022-12-13 20:40:35,276 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 44 transitions, 127 flow [2022-12-13 20:40:35,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:40:35,277 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:40:35,277 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 20:40:35,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 20:40:35,277 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2022-12-13 20:40:35,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:40:35,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1008942999, now seen corresponding path program 1 times [2022-12-13 20:40:35,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:40:35,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027476556] [2022-12-13 20:40:35,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:40:35,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:40:35,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:35,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:40:35,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:40:35,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027476556] [2022-12-13 20:40:35,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027476556] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:40:35,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:40:35,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 20:40:35,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625565149] [2022-12-13 20:40:35,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:40:35,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 20:40:35,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:40:35,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 20:40:35,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 20:40:35,403 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 348 [2022-12-13 20:40:35,404 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 44 transitions, 127 flow. Second operand has 4 states, 4 states have (on average 112.25) internal successors, (449), 4 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:40:35,404 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:40:35,404 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 348 [2022-12-13 20:40:35,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:40:35,557 INFO L130 PetriNetUnfolder]: 143/348 cut-off events. [2022-12-13 20:40:35,557 INFO L131 PetriNetUnfolder]: For 51/51 co-relation queries the response was YES. [2022-12-13 20:40:35,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 797 conditions, 348 events. 143/348 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1462 event pairs, 70 based on Foata normal form. 0/202 useless extension candidates. Maximal degree in co-relation 784. Up to 124 conditions per place. [2022-12-13 20:40:35,559 INFO L137 encePairwiseOnDemand]: 339/348 looper letters, 57 selfloop transitions, 8 changer transitions 0/67 dead transitions. [2022-12-13 20:40:35,559 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 67 transitions, 307 flow [2022-12-13 20:40:35,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 20:40:35,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 20:40:35,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 512 transitions. [2022-12-13 20:40:35,560 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.367816091954023 [2022-12-13 20:40:35,560 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 512 transitions. [2022-12-13 20:40:35,560 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 512 transitions. [2022-12-13 20:40:35,561 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:40:35,561 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 512 transitions. [2022-12-13 20:40:35,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 128.0) internal successors, (512), 4 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:40:35,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 348.0) internal successors, (1740), 5 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:40:35,563 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 348.0) internal successors, (1740), 5 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:40:35,563 INFO L175 Difference]: Start difference. First operand has 46 places, 44 transitions, 127 flow. Second operand 4 states and 512 transitions. [2022-12-13 20:40:35,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 67 transitions, 307 flow [2022-12-13 20:40:35,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 67 transitions, 306 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 20:40:35,565 INFO L231 Difference]: Finished difference. Result has 49 places, 44 transitions, 166 flow [2022-12-13 20:40:35,565 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=166, PETRI_PLACES=49, PETRI_TRANSITIONS=44} [2022-12-13 20:40:35,565 INFO L288 CegarLoopForPetriNet]: 66 programPoint places, -17 predicate places. [2022-12-13 20:40:35,565 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 44 transitions, 166 flow [2022-12-13 20:40:35,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 112.25) internal successors, (449), 4 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:40:35,566 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:40:35,566 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-12-13 20:40:35,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 20:40:35,566 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2022-12-13 20:40:35,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:40:35,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1212534078, now seen corresponding path program 1 times [2022-12-13 20:40:35,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:40:35,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484179337] [2022-12-13 20:40:35,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:40:35,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:40:35,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 20:40:35,573 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 20:40:35,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 20:40:35,590 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 20:40:35,590 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 20:40:35,591 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (81 of 82 remaining) [2022-12-13 20:40:35,592 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (80 of 82 remaining) [2022-12-13 20:40:35,592 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (79 of 82 remaining) [2022-12-13 20:40:35,592 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (78 of 82 remaining) [2022-12-13 20:40:35,592 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (77 of 82 remaining) [2022-12-13 20:40:35,593 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (76 of 82 remaining) [2022-12-13 20:40:35,593 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (75 of 82 remaining) [2022-12-13 20:40:35,593 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (74 of 82 remaining) [2022-12-13 20:40:35,593 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (73 of 82 remaining) [2022-12-13 20:40:35,593 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (72 of 82 remaining) [2022-12-13 20:40:35,593 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (71 of 82 remaining) [2022-12-13 20:40:35,593 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (70 of 82 remaining) [2022-12-13 20:40:35,593 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (69 of 82 remaining) [2022-12-13 20:40:35,593 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 82 remaining) [2022-12-13 20:40:35,593 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 82 remaining) [2022-12-13 20:40:35,593 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 82 remaining) [2022-12-13 20:40:35,594 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 82 remaining) [2022-12-13 20:40:35,594 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 82 remaining) [2022-12-13 20:40:35,594 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 82 remaining) [2022-12-13 20:40:35,594 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 82 remaining) [2022-12-13 20:40:35,594 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 82 remaining) [2022-12-13 20:40:35,594 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 82 remaining) [2022-12-13 20:40:35,594 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 82 remaining) [2022-12-13 20:40:35,594 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22ASSERT_VIOLATIONARRAY_INDEX (58 of 82 remaining) [2022-12-13 20:40:35,594 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 82 remaining) [2022-12-13 20:40:35,594 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 82 remaining) [2022-12-13 20:40:35,594 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (55 of 82 remaining) [2022-12-13 20:40:35,595 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 82 remaining) [2022-12-13 20:40:35,595 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 82 remaining) [2022-12-13 20:40:35,595 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err38ASSERT_VIOLATIONMEMORY_LEAK (52 of 82 remaining) [2022-12-13 20:40:35,595 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 82 remaining) [2022-12-13 20:40:35,595 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 82 remaining) [2022-12-13 20:40:35,595 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 82 remaining) [2022-12-13 20:40:35,595 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 82 remaining) [2022-12-13 20:40:35,595 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 82 remaining) [2022-12-13 20:40:35,595 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 82 remaining) [2022-12-13 20:40:35,595 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 82 remaining) [2022-12-13 20:40:35,595 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 82 remaining) [2022-12-13 20:40:35,596 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 82 remaining) [2022-12-13 20:40:35,596 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 82 remaining) [2022-12-13 20:40:35,596 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 82 remaining) [2022-12-13 20:40:35,596 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 82 remaining) [2022-12-13 20:40:35,596 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (39 of 82 remaining) [2022-12-13 20:40:35,596 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 82 remaining) [2022-12-13 20:40:35,596 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 82 remaining) [2022-12-13 20:40:35,596 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 82 remaining) [2022-12-13 20:40:35,596 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 82 remaining) [2022-12-13 20:40:35,596 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 82 remaining) [2022-12-13 20:40:35,596 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 82 remaining) [2022-12-13 20:40:35,596 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 82 remaining) [2022-12-13 20:40:35,596 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 82 remaining) [2022-12-13 20:40:35,597 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 82 remaining) [2022-12-13 20:40:35,597 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 82 remaining) [2022-12-13 20:40:35,597 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 82 remaining) [2022-12-13 20:40:35,597 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 82 remaining) [2022-12-13 20:40:35,597 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 82 remaining) [2022-12-13 20:40:35,597 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 82 remaining) [2022-12-13 20:40:35,597 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 82 remaining) [2022-12-13 20:40:35,597 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 82 remaining) [2022-12-13 20:40:35,597 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 82 remaining) [2022-12-13 20:40:35,597 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 82 remaining) [2022-12-13 20:40:35,597 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 82 remaining) [2022-12-13 20:40:35,597 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 82 remaining) [2022-12-13 20:40:35,597 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 82 remaining) [2022-12-13 20:40:35,598 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 82 remaining) [2022-12-13 20:40:35,598 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22ASSERT_VIOLATIONARRAY_INDEX (16 of 82 remaining) [2022-12-13 20:40:35,598 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 82 remaining) [2022-12-13 20:40:35,598 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 82 remaining) [2022-12-13 20:40:35,598 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (13 of 82 remaining) [2022-12-13 20:40:35,598 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 82 remaining) [2022-12-13 20:40:35,598 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 82 remaining) [2022-12-13 20:40:35,598 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err38ASSERT_VIOLATIONMEMORY_LEAK (10 of 82 remaining) [2022-12-13 20:40:35,598 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 82 remaining) [2022-12-13 20:40:35,598 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 82 remaining) [2022-12-13 20:40:35,598 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 82 remaining) [2022-12-13 20:40:35,598 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 82 remaining) [2022-12-13 20:40:35,599 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 82 remaining) [2022-12-13 20:40:35,599 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 82 remaining) [2022-12-13 20:40:35,599 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 82 remaining) [2022-12-13 20:40:35,599 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 82 remaining) [2022-12-13 20:40:35,599 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 82 remaining) [2022-12-13 20:40:35,599 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 82 remaining) [2022-12-13 20:40:35,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 20:40:35,599 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:40:35,601 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 20:40:35,601 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-13 20:40:35,656 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 20:40:35,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 281 places, 295 transitions, 602 flow [2022-12-13 20:40:35,698 INFO L130 PetriNetUnfolder]: 21/329 cut-off events. [2022-12-13 20:40:35,698 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 20:40:35,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 339 conditions, 329 events. 21/329 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1023 event pairs, 0 based on Foata normal form. 0/218 useless extension candidates. Maximal degree in co-relation 266. Up to 6 conditions per place. [2022-12-13 20:40:35,699 INFO L82 GeneralOperation]: Start removeDead. Operand has 281 places, 295 transitions, 602 flow [2022-12-13 20:40:35,702 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 281 places, 295 transitions, 602 flow [2022-12-13 20:40:35,702 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 20:40:35,703 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 281 places, 295 transitions, 602 flow [2022-12-13 20:40:35,703 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 281 places, 295 transitions, 602 flow [2022-12-13 20:40:35,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 281 places, 295 transitions, 602 flow [2022-12-13 20:40:35,736 INFO L130 PetriNetUnfolder]: 21/329 cut-off events. [2022-12-13 20:40:35,736 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 20:40:35,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 339 conditions, 329 events. 21/329 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1023 event pairs, 0 based on Foata normal form. 0/218 useless extension candidates. Maximal degree in co-relation 266. Up to 6 conditions per place. [2022-12-13 20:40:35,748 INFO L119 LiptonReduction]: Number of co-enabled transitions 40424 [2022-12-13 20:40:41,708 INFO L134 LiptonReduction]: Checked pairs total: 125216 [2022-12-13 20:40:41,708 INFO L136 LiptonReduction]: Total number of compositions: 247 [2022-12-13 20:40:41,710 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 20:40:41,710 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;@57b10461, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 20:40:41,710 INFO L358 AbstractCegarLoop]: Starting to check reachability of 121 error locations. [2022-12-13 20:40:41,711 INFO L130 PetriNetUnfolder]: 0/3 cut-off events. [2022-12-13 20:40:41,711 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 20:40:41,711 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:40:41,711 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 20:40:41,711 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2022-12-13 20:40:41,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:40:41,712 INFO L85 PathProgramCache]: Analyzing trace with hash 55155, now seen corresponding path program 1 times [2022-12-13 20:40:41,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:40:41,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885991014] [2022-12-13 20:40:41,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:40:41,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:40:41,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:41,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:40:41,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:40:41,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885991014] [2022-12-13 20:40:41,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885991014] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:40:41,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:40:41,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 20:40:41,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616172859] [2022-12-13 20:40:41,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:40:41,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 20:40:41,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:40:41,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 20:40:41,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 20:40:41,769 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 542 [2022-12-13 20:40:41,770 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 148 transitions, 308 flow. Second operand has 3 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:40:41,770 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:40:41,770 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 542 [2022-12-13 20:40:41,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:40:43,025 INFO L130 PetriNetUnfolder]: 8892/14762 cut-off events. [2022-12-13 20:40:43,025 INFO L131 PetriNetUnfolder]: For 125/125 co-relation queries the response was YES. [2022-12-13 20:40:43,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28675 conditions, 14762 events. 8892/14762 cut-off events. For 125/125 co-relation queries the response was YES. Maximal size of possible extension queue 779. Compared 119955 event pairs, 7878 based on Foata normal form. 216/6460 useless extension candidates. Maximal degree in co-relation 23847. Up to 13773 conditions per place. [2022-12-13 20:40:43,080 INFO L137 encePairwiseOnDemand]: 511/542 looper letters, 90 selfloop transitions, 1 changer transitions 0/115 dead transitions. [2022-12-13 20:40:43,080 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 115 transitions, 424 flow [2022-12-13 20:40:43,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 20:40:43,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 20:40:43,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 730 transitions. [2022-12-13 20:40:43,082 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4489544895448955 [2022-12-13 20:40:43,082 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 730 transitions. [2022-12-13 20:40:43,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 730 transitions. [2022-12-13 20:40:43,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:40:43,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 730 transitions. [2022-12-13 20:40:43,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 243.33333333333334) internal successors, (730), 3 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:40:43,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 542.0) internal successors, (2168), 4 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:40:43,097 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 542.0) internal successors, (2168), 4 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:40:43,097 INFO L175 Difference]: Start difference. First operand has 139 places, 148 transitions, 308 flow. Second operand 3 states and 730 transitions. [2022-12-13 20:40:43,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 115 transitions, 424 flow [2022-12-13 20:40:43,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 115 transitions, 422 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-12-13 20:40:43,099 INFO L231 Difference]: Finished difference. Result has 112 places, 115 transitions, 242 flow [2022-12-13 20:40:43,099 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=542, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=242, PETRI_PLACES=112, PETRI_TRANSITIONS=115} [2022-12-13 20:40:43,100 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, -27 predicate places. [2022-12-13 20:40:43,100 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 115 transitions, 242 flow [2022-12-13 20:40:43,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:40:43,100 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:40:43,100 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 20:40:43,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 20:40:43,101 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2022-12-13 20:40:43,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:40:43,101 INFO L85 PathProgramCache]: Analyzing trace with hash 55154, now seen corresponding path program 1 times [2022-12-13 20:40:43,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:40:43,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216902917] [2022-12-13 20:40:43,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:40:43,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:40:43,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:43,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:40:43,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:40:43,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216902917] [2022-12-13 20:40:43,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216902917] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:40:43,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:40:43,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 20:40:43,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120363290] [2022-12-13 20:40:43,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:40:43,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 20:40:43,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:40:43,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 20:40:43,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 20:40:43,166 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 542 [2022-12-13 20:40:43,167 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 115 transitions, 242 flow. Second operand has 3 states, 3 states have (on average 195.66666666666666) internal successors, (587), 3 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:40:43,167 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:40:43,167 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 542 [2022-12-13 20:40:43,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:40:45,142 INFO L130 PetriNetUnfolder]: 13382/22827 cut-off events. [2022-12-13 20:40:45,142 INFO L131 PetriNetUnfolder]: For 200/200 co-relation queries the response was YES. [2022-12-13 20:40:45,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44318 conditions, 22827 events. 13382/22827 cut-off events. For 200/200 co-relation queries the response was YES. Maximal size of possible extension queue 1171. Compared 190321 event pairs, 5732 based on Foata normal form. 0/10535 useless extension candidates. Maximal degree in co-relation 44310. Up to 11696 conditions per place. [2022-12-13 20:40:45,213 INFO L137 encePairwiseOnDemand]: 535/542 looper letters, 173 selfloop transitions, 6 changer transitions 0/203 dead transitions. [2022-12-13 20:40:45,213 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 203 transitions, 781 flow [2022-12-13 20:40:45,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 20:40:45,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 20:40:45,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 765 transitions. [2022-12-13 20:40:45,214 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.470479704797048 [2022-12-13 20:40:45,214 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 765 transitions. [2022-12-13 20:40:45,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 765 transitions. [2022-12-13 20:40:45,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:40:45,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 765 transitions. [2022-12-13 20:40:45,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 255.0) internal successors, (765), 3 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:40:45,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 542.0) internal successors, (2168), 4 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:40:45,217 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 542.0) internal successors, (2168), 4 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:40:45,217 INFO L175 Difference]: Start difference. First operand has 112 places, 115 transitions, 242 flow. Second operand 3 states and 765 transitions. [2022-12-13 20:40:45,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 203 transitions, 781 flow [2022-12-13 20:40:45,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 203 transitions, 780 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 20:40:45,219 INFO L231 Difference]: Finished difference. Result has 115 places, 120 transitions, 287 flow [2022-12-13 20:40:45,220 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=542, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=287, PETRI_PLACES=115, PETRI_TRANSITIONS=120} [2022-12-13 20:40:45,220 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, -24 predicate places. [2022-12-13 20:40:45,220 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 120 transitions, 287 flow [2022-12-13 20:40:45,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 195.66666666666666) internal successors, (587), 3 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:40:45,220 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:40:45,220 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 20:40:45,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 20:40:45,220 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2022-12-13 20:40:45,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:40:45,221 INFO L85 PathProgramCache]: Analyzing trace with hash 53051344, now seen corresponding path program 1 times [2022-12-13 20:40:45,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:40:45,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930492097] [2022-12-13 20:40:45,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:40:45,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:40:45,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:45,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:40:45,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:40:45,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930492097] [2022-12-13 20:40:45,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930492097] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:40:45,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:40:45,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 20:40:45,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066836742] [2022-12-13 20:40:45,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:40:45,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 20:40:45,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:40:45,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 20:40:45,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 20:40:45,343 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 542 [2022-12-13 20:40:45,344 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 120 transitions, 287 flow. Second operand has 4 states, 4 states have (on average 195.0) internal successors, (780), 4 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:40:45,344 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:40:45,344 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 542 [2022-12-13 20:40:45,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:40:49,011 INFO L130 PetriNetUnfolder]: 24960/43150 cut-off events. [2022-12-13 20:40:49,011 INFO L131 PetriNetUnfolder]: For 15080/15080 co-relation queries the response was YES. [2022-12-13 20:40:49,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95620 conditions, 43150 events. 24960/43150 cut-off events. For 15080/15080 co-relation queries the response was YES. Maximal size of possible extension queue 2462. Compared 410204 event pairs, 6956 based on Foata normal form. 0/23496 useless extension candidates. Maximal degree in co-relation 95609. Up to 16958 conditions per place. [2022-12-13 20:40:49,166 INFO L137 encePairwiseOnDemand]: 529/542 looper letters, 240 selfloop transitions, 17 changer transitions 0/281 dead transitions. [2022-12-13 20:40:49,166 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 281 transitions, 1178 flow [2022-12-13 20:40:49,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 20:40:49,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 20:40:49,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1029 transitions. [2022-12-13 20:40:49,168 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4746309963099631 [2022-12-13 20:40:49,168 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1029 transitions. [2022-12-13 20:40:49,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1029 transitions. [2022-12-13 20:40:49,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:40:49,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1029 transitions. [2022-12-13 20:40:49,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 257.25) internal successors, (1029), 4 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:40:49,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 542.0) internal successors, (2710), 5 states have internal predecessors, (2710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:40:49,172 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 542.0) internal successors, (2710), 5 states have internal predecessors, (2710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:40:49,172 INFO L175 Difference]: Start difference. First operand has 115 places, 120 transitions, 287 flow. Second operand 4 states and 1029 transitions. [2022-12-13 20:40:49,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 281 transitions, 1178 flow [2022-12-13 20:40:49,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 281 transitions, 1148 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 20:40:49,180 INFO L231 Difference]: Finished difference. Result has 119 places, 136 transitions, 435 flow [2022-12-13 20:40:49,180 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=542, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=435, PETRI_PLACES=119, PETRI_TRANSITIONS=136} [2022-12-13 20:40:49,180 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, -20 predicate places. [2022-12-13 20:40:49,180 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 136 transitions, 435 flow [2022-12-13 20:40:49,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 195.0) internal successors, (780), 4 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:40:49,181 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:40:49,181 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 20:40:49,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 20:40:49,181 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2022-12-13 20:40:49,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:40:49,181 INFO L85 PathProgramCache]: Analyzing trace with hash 53051345, now seen corresponding path program 1 times [2022-12-13 20:40:49,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:40:49,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436636395] [2022-12-13 20:40:49,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:40:49,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:40:49,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:49,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:40:49,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:40:49,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436636395] [2022-12-13 20:40:49,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436636395] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:40:49,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:40:49,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 20:40:49,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047110521] [2022-12-13 20:40:49,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:40:49,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 20:40:49,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:40:49,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 20:40:49,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 20:40:49,304 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 542 [2022-12-13 20:40:49,304 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 136 transitions, 435 flow. Second operand has 4 states, 4 states have (on average 207.0) internal successors, (828), 4 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:40:49,304 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:40:49,304 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 542 [2022-12-13 20:40:49,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:40:53,080 INFO L130 PetriNetUnfolder]: 23218/39901 cut-off events. [2022-12-13 20:40:53,080 INFO L131 PetriNetUnfolder]: For 12948/12948 co-relation queries the response was YES. [2022-12-13 20:40:53,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90293 conditions, 39901 events. 23218/39901 cut-off events. For 12948/12948 co-relation queries the response was YES. Maximal size of possible extension queue 2304. Compared 376023 event pairs, 18618 based on Foata normal form. 400/21008 useless extension candidates. Maximal degree in co-relation 90279. Up to 36444 conditions per place. [2022-12-13 20:40:53,255 INFO L137 encePairwiseOnDemand]: 537/542 looper letters, 107 selfloop transitions, 1 changer transitions 0/132 dead transitions. [2022-12-13 20:40:53,255 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 132 transitions, 643 flow [2022-12-13 20:40:53,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 20:40:53,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 20:40:53,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 709 transitions. [2022-12-13 20:40:53,257 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4360393603936039 [2022-12-13 20:40:53,257 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 709 transitions. [2022-12-13 20:40:53,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 709 transitions. [2022-12-13 20:40:53,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:40:53,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 709 transitions. [2022-12-13 20:40:53,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 236.33333333333334) internal successors, (709), 3 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:40:53,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 542.0) internal successors, (2168), 4 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:40:53,262 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 542.0) internal successors, (2168), 4 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:40:53,262 INFO L175 Difference]: Start difference. First operand has 119 places, 136 transitions, 435 flow. Second operand 3 states and 709 transitions. [2022-12-13 20:40:53,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 132 transitions, 643 flow [2022-12-13 20:40:53,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 132 transitions, 643 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 20:40:53,279 INFO L231 Difference]: Finished difference. Result has 117 places, 132 transitions, 429 flow [2022-12-13 20:40:53,279 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=542, PETRI_DIFFERENCE_MINUEND_FLOW=427, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=429, PETRI_PLACES=117, PETRI_TRANSITIONS=132} [2022-12-13 20:40:53,279 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, -22 predicate places. [2022-12-13 20:40:53,279 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 132 transitions, 429 flow [2022-12-13 20:40:53,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 207.0) internal successors, (828), 4 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:40:53,280 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:40:53,280 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 20:40:53,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 20:40:53,280 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2022-12-13 20:40:53,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:40:53,280 INFO L85 PathProgramCache]: Analyzing trace with hash -557211406, now seen corresponding path program 1 times [2022-12-13 20:40:53,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:40:53,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080476285] [2022-12-13 20:40:53,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:40:53,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:40:53,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:53,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:40:53,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:40:53,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080476285] [2022-12-13 20:40:53,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080476285] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:40:53,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:40:53,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 20:40:53,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559323876] [2022-12-13 20:40:53,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:40:53,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 20:40:53,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:40:53,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 20:40:53,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 20:40:53,425 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 542 [2022-12-13 20:40:53,426 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 132 transitions, 429 flow. Second operand has 4 states, 4 states have (on average 187.5) internal successors, (750), 4 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:40:53,426 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:40:53,426 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 542 [2022-12-13 20:40:53,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:40:57,650 INFO L130 PetriNetUnfolder]: 30164/51994 cut-off events. [2022-12-13 20:40:57,650 INFO L131 PetriNetUnfolder]: For 16495/16495 co-relation queries the response was YES. [2022-12-13 20:40:57,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118078 conditions, 51994 events. 30164/51994 cut-off events. For 16495/16495 co-relation queries the response was YES. Maximal size of possible extension queue 3075. Compared 508554 event pairs, 9100 based on Foata normal form. 0/27426 useless extension candidates. Maximal degree in co-relation 118062. Up to 24854 conditions per place. [2022-12-13 20:40:57,844 INFO L137 encePairwiseOnDemand]: 511/542 looper letters, 226 selfloop transitions, 39 changer transitions 0/286 dead transitions. [2022-12-13 20:40:57,844 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 286 transitions, 1377 flow [2022-12-13 20:40:57,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 20:40:57,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 20:40:57,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 997 transitions. [2022-12-13 20:40:57,846 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4598708487084871 [2022-12-13 20:40:57,846 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 997 transitions. [2022-12-13 20:40:57,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 997 transitions. [2022-12-13 20:40:57,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:40:57,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 997 transitions. [2022-12-13 20:40:57,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 249.25) internal successors, (997), 4 states have internal predecessors, (997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:40:57,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 542.0) internal successors, (2710), 5 states have internal predecessors, (2710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:40:57,849 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 542.0) internal successors, (2710), 5 states have internal predecessors, (2710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:40:57,849 INFO L175 Difference]: Start difference. First operand has 117 places, 132 transitions, 429 flow. Second operand 4 states and 997 transitions. [2022-12-13 20:40:57,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 286 transitions, 1377 flow [2022-12-13 20:40:57,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 286 transitions, 1376 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 20:40:57,870 INFO L231 Difference]: Finished difference. Result has 122 places, 162 transitions, 788 flow [2022-12-13 20:40:57,870 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=542, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=788, PETRI_PLACES=122, PETRI_TRANSITIONS=162} [2022-12-13 20:40:57,871 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, -17 predicate places. [2022-12-13 20:40:57,871 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 162 transitions, 788 flow [2022-12-13 20:40:57,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 187.5) internal successors, (750), 4 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:40:57,871 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:40:57,871 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 20:40:57,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 20:40:57,871 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2022-12-13 20:40:57,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:40:57,872 INFO L85 PathProgramCache]: Analyzing trace with hash -557211405, now seen corresponding path program 1 times [2022-12-13 20:40:57,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:40:57,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557937771] [2022-12-13 20:40:57,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:40:57,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:40:57,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:57,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:40:57,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:40:57,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557937771] [2022-12-13 20:40:57,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557937771] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:40:57,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:40:57,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 20:40:57,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306342399] [2022-12-13 20:40:57,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:40:57,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 20:40:57,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:40:57,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 20:40:57,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 20:40:57,943 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 542 [2022-12-13 20:40:57,944 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 162 transitions, 788 flow. Second operand has 3 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 20:40:57,944 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:40:57,944 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 542 [2022-12-13 20:40:57,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:41:02,405 INFO L130 PetriNetUnfolder]: 24545/42676 cut-off events. [2022-12-13 20:41:02,405 INFO L131 PetriNetUnfolder]: For 27323/27401 co-relation queries the response was YES. [2022-12-13 20:41:02,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112396 conditions, 42676 events. 24545/42676 cut-off events. For 27323/27401 co-relation queries the response was YES. Maximal size of possible extension queue 2513. Compared 413234 event pairs, 17196 based on Foata normal form. 2612/28379 useless extension candidates. Maximal degree in co-relation 112376. Up to 38768 conditions per place. [2022-12-13 20:41:02,612 INFO L137 encePairwiseOnDemand]: 533/542 looper letters, 130 selfloop transitions, 1 changer transitions 0/154 dead transitions. [2022-12-13 20:41:02,612 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 154 transitions, 1034 flow [2022-12-13 20:41:02,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 20:41:02,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 20:41:02,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 695 transitions. [2022-12-13 20:41:02,614 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4274292742927429 [2022-12-13 20:41:02,614 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 695 transitions. [2022-12-13 20:41:02,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 695 transitions. [2022-12-13 20:41:02,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:41:02,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 695 transitions. [2022-12-13 20:41:02,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 20:41:02,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 542.0) internal successors, (2168), 4 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:41:02,617 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 542.0) internal successors, (2168), 4 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:41:02,617 INFO L175 Difference]: Start difference. First operand has 122 places, 162 transitions, 788 flow. Second operand 3 states and 695 transitions. [2022-12-13 20:41:02,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 154 transitions, 1034 flow [2022-12-13 20:41:02,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 154 transitions, 1029 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 20:41:02,644 INFO L231 Difference]: Finished difference. Result has 115 places, 154 transitions, 769 flow [2022-12-13 20:41:02,644 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=542, PETRI_DIFFERENCE_MINUEND_FLOW=767, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=769, PETRI_PLACES=115, PETRI_TRANSITIONS=154} [2022-12-13 20:41:02,644 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, -24 predicate places. [2022-12-13 20:41:02,644 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 154 transitions, 769 flow [2022-12-13 20:41:02,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 20:41:02,645 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:41:02,645 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:41:02,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-13 20:41:02,645 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2022-12-13 20:41:02,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:41:02,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1994489777, now seen corresponding path program 1 times [2022-12-13 20:41:02,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:41:02,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266141659] [2022-12-13 20:41:02,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:41:02,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:41:02,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:41:02,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:41:02,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:41:02,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266141659] [2022-12-13 20:41:02,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266141659] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:41:02,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:41:02,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 20:41:02,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858874481] [2022-12-13 20:41:02,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:41:02,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 20:41:02,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:41:02,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 20:41:02,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 20:41:02,689 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 542 [2022-12-13 20:41:02,690 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 154 transitions, 769 flow. Second operand has 4 states, 4 states have (on average 200.5) internal successors, (802), 4 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:41:02,690 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:41:02,690 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 542 [2022-12-13 20:41:02,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:41:06,917 INFO L130 PetriNetUnfolder]: 26679/46308 cut-off events. [2022-12-13 20:41:06,917 INFO L131 PetriNetUnfolder]: For 28994/29072 co-relation queries the response was YES. [2022-12-13 20:41:06,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122351 conditions, 46308 events. 26679/46308 cut-off events. For 28994/29072 co-relation queries the response was YES. Maximal size of possible extension queue 2668. Compared 448739 event pairs, 15256 based on Foata normal form. 500/28778 useless extension candidates. Maximal degree in co-relation 122330. Up to 35819 conditions per place. [2022-12-13 20:41:07,110 INFO L137 encePairwiseOnDemand]: 531/542 looper letters, 279 selfloop transitions, 11 changer transitions 0/311 dead transitions. [2022-12-13 20:41:07,111 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 311 transitions, 2135 flow [2022-12-13 20:41:07,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 20:41:07,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 20:41:07,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1192 transitions. [2022-12-13 20:41:07,113 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4398523985239852 [2022-12-13 20:41:07,113 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1192 transitions. [2022-12-13 20:41:07,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1192 transitions. [2022-12-13 20:41:07,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:41:07,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1192 transitions. [2022-12-13 20:41:07,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 238.4) internal successors, (1192), 5 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:41:07,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 542.0) internal successors, (3252), 6 states have internal predecessors, (3252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:41:07,118 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 542.0) internal successors, (3252), 6 states have internal predecessors, (3252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:41:07,118 INFO L175 Difference]: Start difference. First operand has 115 places, 154 transitions, 769 flow. Second operand 5 states and 1192 transitions. [2022-12-13 20:41:07,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 311 transitions, 2135 flow [2022-12-13 20:41:07,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 311 transitions, 2134 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 20:41:07,139 INFO L231 Difference]: Finished difference. Result has 122 places, 163 transitions, 866 flow [2022-12-13 20:41:07,139 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=542, PETRI_DIFFERENCE_MINUEND_FLOW=768, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=866, PETRI_PLACES=122, PETRI_TRANSITIONS=163} [2022-12-13 20:41:07,139 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, -17 predicate places. [2022-12-13 20:41:07,139 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 163 transitions, 866 flow [2022-12-13 20:41:07,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 200.5) internal successors, (802), 4 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:41:07,139 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:41:07,139 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-12-13 20:41:07,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-13 20:41:07,140 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 118 more)] === [2022-12-13 20:41:07,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:41:07,140 INFO L85 PathProgramCache]: Analyzing trace with hash -763851596, now seen corresponding path program 1 times [2022-12-13 20:41:07,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:41:07,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86907563] [2022-12-13 20:41:07,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:41:07,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:41:07,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 20:41:07,147 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 20:41:07,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 20:41:07,154 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 20:41:07,154 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 20:41:07,155 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (120 of 121 remaining) [2022-12-13 20:41:07,155 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (119 of 121 remaining) [2022-12-13 20:41:07,155 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (118 of 121 remaining) [2022-12-13 20:41:07,155 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (117 of 121 remaining) [2022-12-13 20:41:07,155 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (116 of 121 remaining) [2022-12-13 20:41:07,155 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (115 of 121 remaining) [2022-12-13 20:41:07,155 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (114 of 121 remaining) [2022-12-13 20:41:07,155 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (113 of 121 remaining) [2022-12-13 20:41:07,155 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (112 of 121 remaining) [2022-12-13 20:41:07,155 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (111 of 121 remaining) [2022-12-13 20:41:07,155 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (110 of 121 remaining) [2022-12-13 20:41:07,155 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (109 of 121 remaining) [2022-12-13 20:41:07,155 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (108 of 121 remaining) [2022-12-13 20:41:07,155 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (107 of 121 remaining) [2022-12-13 20:41:07,156 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (106 of 121 remaining) [2022-12-13 20:41:07,156 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (105 of 121 remaining) [2022-12-13 20:41:07,156 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (104 of 121 remaining) [2022-12-13 20:41:07,156 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (103 of 121 remaining) [2022-12-13 20:41:07,156 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (102 of 121 remaining) [2022-12-13 20:41:07,156 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (101 of 121 remaining) [2022-12-13 20:41:07,156 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (100 of 121 remaining) [2022-12-13 20:41:07,156 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (99 of 121 remaining) [2022-12-13 20:41:07,156 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (98 of 121 remaining) [2022-12-13 20:41:07,156 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22ASSERT_VIOLATIONARRAY_INDEX (97 of 121 remaining) [2022-12-13 20:41:07,156 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (96 of 121 remaining) [2022-12-13 20:41:07,156 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (95 of 121 remaining) [2022-12-13 20:41:07,156 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (94 of 121 remaining) [2022-12-13 20:41:07,156 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (93 of 121 remaining) [2022-12-13 20:41:07,156 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (92 of 121 remaining) [2022-12-13 20:41:07,156 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err38ASSERT_VIOLATIONMEMORY_LEAK (91 of 121 remaining) [2022-12-13 20:41:07,157 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (90 of 121 remaining) [2022-12-13 20:41:07,157 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (89 of 121 remaining) [2022-12-13 20:41:07,157 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (88 of 121 remaining) [2022-12-13 20:41:07,157 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (87 of 121 remaining) [2022-12-13 20:41:07,157 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (86 of 121 remaining) [2022-12-13 20:41:07,157 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (85 of 121 remaining) [2022-12-13 20:41:07,157 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (84 of 121 remaining) [2022-12-13 20:41:07,157 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (83 of 121 remaining) [2022-12-13 20:41:07,157 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (82 of 121 remaining) [2022-12-13 20:41:07,157 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (81 of 121 remaining) [2022-12-13 20:41:07,157 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (80 of 121 remaining) [2022-12-13 20:41:07,157 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (79 of 121 remaining) [2022-12-13 20:41:07,157 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (78 of 121 remaining) [2022-12-13 20:41:07,157 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (77 of 121 remaining) [2022-12-13 20:41:07,157 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (76 of 121 remaining) [2022-12-13 20:41:07,158 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (75 of 121 remaining) [2022-12-13 20:41:07,158 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (74 of 121 remaining) [2022-12-13 20:41:07,158 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (73 of 121 remaining) [2022-12-13 20:41:07,158 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (72 of 121 remaining) [2022-12-13 20:41:07,158 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (71 of 121 remaining) [2022-12-13 20:41:07,158 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (70 of 121 remaining) [2022-12-13 20:41:07,158 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (69 of 121 remaining) [2022-12-13 20:41:07,158 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 121 remaining) [2022-12-13 20:41:07,158 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 121 remaining) [2022-12-13 20:41:07,158 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 121 remaining) [2022-12-13 20:41:07,158 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 121 remaining) [2022-12-13 20:41:07,158 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 121 remaining) [2022-12-13 20:41:07,158 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 121 remaining) [2022-12-13 20:41:07,158 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 121 remaining) [2022-12-13 20:41:07,158 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 121 remaining) [2022-12-13 20:41:07,159 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 121 remaining) [2022-12-13 20:41:07,159 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 121 remaining) [2022-12-13 20:41:07,159 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 121 remaining) [2022-12-13 20:41:07,159 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 121 remaining) [2022-12-13 20:41:07,159 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 121 remaining) [2022-12-13 20:41:07,159 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22ASSERT_VIOLATIONARRAY_INDEX (55 of 121 remaining) [2022-12-13 20:41:07,159 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 121 remaining) [2022-12-13 20:41:07,159 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 121 remaining) [2022-12-13 20:41:07,159 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (52 of 121 remaining) [2022-12-13 20:41:07,159 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 121 remaining) [2022-12-13 20:41:07,159 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 121 remaining) [2022-12-13 20:41:07,159 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err38ASSERT_VIOLATIONMEMORY_LEAK (49 of 121 remaining) [2022-12-13 20:41:07,159 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 121 remaining) [2022-12-13 20:41:07,159 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 121 remaining) [2022-12-13 20:41:07,159 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 121 remaining) [2022-12-13 20:41:07,160 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 121 remaining) [2022-12-13 20:41:07,160 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 121 remaining) [2022-12-13 20:41:07,160 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 121 remaining) [2022-12-13 20:41:07,160 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 121 remaining) [2022-12-13 20:41:07,160 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 121 remaining) [2022-12-13 20:41:07,160 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 121 remaining) [2022-12-13 20:41:07,160 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 121 remaining) [2022-12-13 20:41:07,160 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 121 remaining) [2022-12-13 20:41:07,160 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 121 remaining) [2022-12-13 20:41:07,160 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 121 remaining) [2022-12-13 20:41:07,160 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 121 remaining) [2022-12-13 20:41:07,160 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 121 remaining) [2022-12-13 20:41:07,160 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 121 remaining) [2022-12-13 20:41:07,160 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 121 remaining) [2022-12-13 20:41:07,160 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 121 remaining) [2022-12-13 20:41:07,161 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 121 remaining) [2022-12-13 20:41:07,161 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 121 remaining) [2022-12-13 20:41:07,161 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 121 remaining) [2022-12-13 20:41:07,161 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 121 remaining) [2022-12-13 20:41:07,161 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 121 remaining) [2022-12-13 20:41:07,161 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 121 remaining) [2022-12-13 20:41:07,161 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 121 remaining) [2022-12-13 20:41:07,161 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 121 remaining) [2022-12-13 20:41:07,161 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 121 remaining) [2022-12-13 20:41:07,161 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 121 remaining) [2022-12-13 20:41:07,161 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 121 remaining) [2022-12-13 20:41:07,161 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 121 remaining) [2022-12-13 20:41:07,161 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 121 remaining) [2022-12-13 20:41:07,161 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 121 remaining) [2022-12-13 20:41:07,161 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22ASSERT_VIOLATIONARRAY_INDEX (16 of 121 remaining) [2022-12-13 20:41:07,162 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 121 remaining) [2022-12-13 20:41:07,162 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 121 remaining) [2022-12-13 20:41:07,162 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (13 of 121 remaining) [2022-12-13 20:41:07,162 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 121 remaining) [2022-12-13 20:41:07,162 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 121 remaining) [2022-12-13 20:41:07,162 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err38ASSERT_VIOLATIONMEMORY_LEAK (10 of 121 remaining) [2022-12-13 20:41:07,162 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 121 remaining) [2022-12-13 20:41:07,162 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 121 remaining) [2022-12-13 20:41:07,162 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 121 remaining) [2022-12-13 20:41:07,162 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 121 remaining) [2022-12-13 20:41:07,162 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 121 remaining) [2022-12-13 20:41:07,162 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 121 remaining) [2022-12-13 20:41:07,162 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 121 remaining) [2022-12-13 20:41:07,162 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 121 remaining) [2022-12-13 20:41:07,162 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 121 remaining) [2022-12-13 20:41:07,162 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 121 remaining) [2022-12-13 20:41:07,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-13 20:41:07,163 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:41:07,163 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 20:41:07,163 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-12-13 20:41:07,226 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 20:41:07,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 399 places, 420 transitions, 861 flow [2022-12-13 20:41:07,292 INFO L130 PetriNetUnfolder]: 31/472 cut-off events. [2022-12-13 20:41:07,292 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-13 20:41:07,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 488 conditions, 472 events. 31/472 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1810 event pairs, 0 based on Foata normal form. 0/308 useless extension candidates. Maximal degree in co-relation 390. Up to 8 conditions per place. [2022-12-13 20:41:07,297 INFO L82 GeneralOperation]: Start removeDead. Operand has 399 places, 420 transitions, 861 flow [2022-12-13 20:41:07,306 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 399 places, 420 transitions, 861 flow [2022-12-13 20:41:07,306 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 20:41:07,307 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 399 places, 420 transitions, 861 flow [2022-12-13 20:41:07,307 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 399 places, 420 transitions, 861 flow [2022-12-13 20:41:07,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 399 places, 420 transitions, 861 flow [2022-12-13 20:41:07,366 INFO L130 PetriNetUnfolder]: 31/472 cut-off events. [2022-12-13 20:41:07,366 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-13 20:41:07,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 488 conditions, 472 events. 31/472 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1810 event pairs, 0 based on Foata normal form. 0/308 useless extension candidates. Maximal degree in co-relation 390. Up to 8 conditions per place. [2022-12-13 20:41:07,388 INFO L119 LiptonReduction]: Number of co-enabled transitions 107136 [2022-12-13 20:41:16,043 INFO L134 LiptonReduction]: Checked pairs total: 319403 [2022-12-13 20:41:16,043 INFO L136 LiptonReduction]: Total number of compositions: 355 [2022-12-13 20:41:16,045 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 20:41:16,045 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;@57b10461, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 20:41:16,045 INFO L358 AbstractCegarLoop]: Starting to check reachability of 160 error locations. [2022-12-13 20:41:16,046 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2022-12-13 20:41:16,046 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 20:41:16,046 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:41:16,046 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 20:41:16,046 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 157 more)] === [2022-12-13 20:41:16,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:41:16,047 INFO L85 PathProgramCache]: Analyzing trace with hash 83885, now seen corresponding path program 1 times [2022-12-13 20:41:16,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:41:16,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791628825] [2022-12-13 20:41:16,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:41:16,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:41:16,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:41:16,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:41:16,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:41:16,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791628825] [2022-12-13 20:41:16,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791628825] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:41:16,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:41:16,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 20:41:16,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445102137] [2022-12-13 20:41:16,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:41:16,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 20:41:16,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:41:16,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 20:41:16,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 20:41:16,116 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 285 out of 775 [2022-12-13 20:41:16,117 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 216 transitions, 453 flow. Second operand has 3 states, 3 states have (on average 285.6666666666667) internal successors, (857), 3 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:41:16,117 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:41:16,117 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 285 of 775 [2022-12-13 20:41:16,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:42:15,110 INFO L130 PetriNetUnfolder]: 582979/818701 cut-off events. [2022-12-13 20:42:15,110 INFO L131 PetriNetUnfolder]: For 9883/9883 co-relation queries the response was YES. [2022-12-13 20:42:16,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1609806 conditions, 818701 events. 582979/818701 cut-off events. For 9883/9883 co-relation queries the response was YES. Maximal size of possible extension queue 30549. Compared 7633482 event pairs, 518764 based on Foata normal form. 18667/347535 useless extension candidates. Maximal degree in co-relation 656909. Up to 784300 conditions per place. [2022-12-13 20:42:18,693 INFO L137 encePairwiseOnDemand]: 730/775 looper letters, 136 selfloop transitions, 1 changer transitions 0/169 dead transitions. [2022-12-13 20:42:18,694 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 169 transitions, 633 flow [2022-12-13 20:42:18,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 20:42:18,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 20:42:18,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1036 transitions. [2022-12-13 20:42:18,696 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4455913978494624 [2022-12-13 20:42:18,696 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1036 transitions. [2022-12-13 20:42:18,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1036 transitions. [2022-12-13 20:42:18,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:42:18,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1036 transitions. [2022-12-13 20:42:18,698 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 345.3333333333333) internal successors, (1036), 3 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:42:18,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 775.0) internal successors, (3100), 4 states have internal predecessors, (3100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:42:18,701 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 775.0) internal successors, (3100), 4 states have internal predecessors, (3100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:42:18,701 INFO L175 Difference]: Start difference. First operand has 202 places, 216 transitions, 453 flow. Second operand 3 states and 1036 transitions. [2022-12-13 20:42:18,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 169 transitions, 633 flow [2022-12-13 20:42:18,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 169 transitions, 627 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-12-13 20:42:18,708 INFO L231 Difference]: Finished difference. Result has 163 places, 169 transitions, 355 flow [2022-12-13 20:42:18,708 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=775, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=355, PETRI_PLACES=163, PETRI_TRANSITIONS=169} [2022-12-13 20:42:18,709 INFO L288 CegarLoopForPetriNet]: 202 programPoint places, -39 predicate places. [2022-12-13 20:42:18,709 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 169 transitions, 355 flow [2022-12-13 20:42:18,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 285.6666666666667) internal successors, (857), 3 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:42:18,709 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:42:18,709 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 20:42:18,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-13 20:42:18,709 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 157 more)] === [2022-12-13 20:42:18,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:42:18,710 INFO L85 PathProgramCache]: Analyzing trace with hash 83887, now seen corresponding path program 1 times [2022-12-13 20:42:18,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:42:18,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165759453] [2022-12-13 20:42:18,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:42:18,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:42:18,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:42:18,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:42:18,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:42:18,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165759453] [2022-12-13 20:42:18,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165759453] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:42:18,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:42:18,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 20:42:18,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311811644] [2022-12-13 20:42:18,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:42:18,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 20:42:18,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:42:18,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 20:42:18,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 20:42:18,773 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 775 [2022-12-13 20:42:18,774 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 169 transitions, 355 flow. Second operand has 3 states, 3 states have (on average 274.6666666666667) internal successors, (824), 3 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:42:18,774 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:42:18,774 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 775 [2022-12-13 20:42:18,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:43:56,453 INFO L130 PetriNetUnfolder]: 919230/1318681 cut-off events. [2022-12-13 20:43:56,453 INFO L131 PetriNetUnfolder]: For 8824/8824 co-relation queries the response was YES. [2022-12-13 20:43:58,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2581228 conditions, 1318681 events. 919230/1318681 cut-off events. For 8824/8824 co-relation queries the response was YES. Maximal size of possible extension queue 39864. Compared 12865989 event pairs, 357322 based on Foata normal form. 0/571795 useless extension candidates. Maximal degree in co-relation 2581219. Up to 723220 conditions per place. [2022-12-13 20:44:02,404 INFO L137 encePairwiseOnDemand]: 766/775 looper letters, 263 selfloop transitions, 8 changer transitions 0/303 dead transitions. [2022-12-13 20:44:02,404 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 303 transitions, 1175 flow [2022-12-13 20:44:02,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 20:44:02,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 20:44:02,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1094 transitions. [2022-12-13 20:44:02,407 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47053763440860213 [2022-12-13 20:44:02,407 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1094 transitions. [2022-12-13 20:44:02,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1094 transitions. [2022-12-13 20:44:02,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:44:02,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1094 transitions. [2022-12-13 20:44:02,409 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 364.6666666666667) internal successors, (1094), 3 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:44:02,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 775.0) internal successors, (3100), 4 states have internal predecessors, (3100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:44:02,412 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 775.0) internal successors, (3100), 4 states have internal predecessors, (3100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:44:02,412 INFO L175 Difference]: Start difference. First operand has 163 places, 169 transitions, 355 flow. Second operand 3 states and 1094 transitions. [2022-12-13 20:44:02,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 303 transitions, 1175 flow [2022-12-13 20:44:02,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 303 transitions, 1174 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 20:44:02,417 INFO L231 Difference]: Finished difference. Result has 166 places, 176 transitions, 416 flow [2022-12-13 20:44:02,418 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=775, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=416, PETRI_PLACES=166, PETRI_TRANSITIONS=176} [2022-12-13 20:44:02,418 INFO L288 CegarLoopForPetriNet]: 202 programPoint places, -36 predicate places. [2022-12-13 20:44:02,418 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 176 transitions, 416 flow [2022-12-13 20:44:02,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 274.6666666666667) internal successors, (824), 3 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:44:02,419 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:44:02,419 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 20:44:02,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-13 20:44:02,419 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 157 more)] === [2022-12-13 20:44:02,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:44:02,420 INFO L85 PathProgramCache]: Analyzing trace with hash 80686266, now seen corresponding path program 1 times [2022-12-13 20:44:02,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:44:02,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828743091] [2022-12-13 20:44:02,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:44:02,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:44:02,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:44:02,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:44:02,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:44:02,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828743091] [2022-12-13 20:44:02,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828743091] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:44:02,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:44:02,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 20:44:02,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460783769] [2022-12-13 20:44:02,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:44:02,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 20:44:02,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:44:02,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 20:44:02,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 20:44:02,556 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 775 [2022-12-13 20:44:02,557 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 176 transitions, 416 flow. Second operand has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:44:02,558 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:44:02,558 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 775 [2022-12-13 20:44:02,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand