./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-complex/safestack_relacy.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a 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_64ec708e-cdb6-4814-8454-eafe77395b29/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ec708e-cdb6-4814-8454-eafe77395b29/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ec708e-cdb6-4814-8454-eafe77395b29/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ec708e-cdb6-4814-8454-eafe77395b29/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-complex/safestack_relacy.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ec708e-cdb6-4814-8454-eafe77395b29/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ec708e-cdb6-4814-8454-eafe77395b29/bin/uautomizer-ZsLfNo2U6R --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 1d61eb304445c3cb39dfadfa4748d680ea5f0f4958f8bc176e8bc3c77c47e674 --- 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-38b53e6 [2022-11-25 18:10:53,945 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 18:10:53,947 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 18:10:53,968 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 18:10:53,969 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 18:10:53,970 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 18:10:53,971 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 18:10:53,973 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 18:10:53,975 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 18:10:53,976 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 18:10:53,977 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 18:10:53,978 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 18:10:53,979 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 18:10:53,980 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 18:10:53,982 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 18:10:53,983 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 18:10:53,984 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 18:10:53,985 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 18:10:53,987 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 18:10:53,990 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 18:10:53,992 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 18:10:53,993 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 18:10:53,995 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 18:10:53,996 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 18:10:54,000 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 18:10:54,000 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 18:10:54,001 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 18:10:54,002 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 18:10:54,003 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 18:10:54,004 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 18:10:54,004 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 18:10:54,005 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 18:10:54,006 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 18:10:54,007 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 18:10:54,008 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 18:10:54,009 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 18:10:54,010 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 18:10:54,010 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 18:10:54,011 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 18:10:54,012 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 18:10:54,013 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 18:10:54,014 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ec708e-cdb6-4814-8454-eafe77395b29/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 18:10:54,054 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 18:10:54,055 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 18:10:54,055 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 18:10:54,055 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 18:10:54,056 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 18:10:54,056 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 18:10:54,057 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 18:10:54,057 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 18:10:54,058 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 18:10:54,058 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 18:10:54,058 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 18:10:54,059 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 18:10:54,059 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 18:10:54,059 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 18:10:54,060 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 18:10:54,060 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 18:10:54,060 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 18:10:54,060 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 18:10:54,061 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 18:10:54,061 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 18:10:54,061 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 18:10:54,062 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 18:10:54,062 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 18:10:54,062 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 18:10:54,066 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 18:10:54,068 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:10:54,068 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 18:10:54,068 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 18:10:54,069 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 18:10:54,069 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 18:10:54,070 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 18:10:54,070 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 18:10:54,070 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 18:10:54,070 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_64ec708e-cdb6-4814-8454-eafe77395b29/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ec708e-cdb6-4814-8454-eafe77395b29/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d61eb304445c3cb39dfadfa4748d680ea5f0f4958f8bc176e8bc3c77c47e674 [2022-11-25 18:10:54,385 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 18:10:54,406 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 18:10:54,408 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 18:10:54,410 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 18:10:54,410 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 18:10:54,411 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ec708e-cdb6-4814-8454-eafe77395b29/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/pthread-complex/safestack_relacy.i [2022-11-25 18:10:57,583 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 18:10:58,012 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 18:10:58,012 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ec708e-cdb6-4814-8454-eafe77395b29/sv-benchmarks/c/pthread-complex/safestack_relacy.i [2022-11-25 18:10:58,044 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ec708e-cdb6-4814-8454-eafe77395b29/bin/uautomizer-ZsLfNo2U6R/data/0370d4f38/27d55a97ef10440496ddb3082f551f19/FLAGe5af41dd1 [2022-11-25 18:10:58,066 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ec708e-cdb6-4814-8454-eafe77395b29/bin/uautomizer-ZsLfNo2U6R/data/0370d4f38/27d55a97ef10440496ddb3082f551f19 [2022-11-25 18:10:58,071 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 18:10:58,072 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 18:10:58,077 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 18:10:58,078 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 18:10:58,081 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 18:10:58,082 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:10:58" (1/1) ... [2022-11-25 18:10:58,083 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4879dec9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:10:58, skipping insertion in model container [2022-11-25 18:10:58,083 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:10:58" (1/1) ... [2022-11-25 18:10:58,090 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 18:10:58,164 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 18:10:59,250 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:10:59,251 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:10:59,254 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:10:59,257 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:10:59,260 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:10:59,263 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:10:59,265 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:10:59,266 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:10:59,268 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:10:59,270 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:10:59,310 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_64ec708e-cdb6-4814-8454-eafe77395b29/sv-benchmarks/c/pthread-complex/safestack_relacy.i[78860,78873] [2022-11-25 18:10:59,320 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:10:59,332 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 18:10:59,396 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:10:59,396 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:10:59,397 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:10:59,398 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:10:59,399 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:10:59,400 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:10:59,401 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:10:59,402 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:10:59,403 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:10:59,404 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:10:59,416 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_64ec708e-cdb6-4814-8454-eafe77395b29/sv-benchmarks/c/pthread-complex/safestack_relacy.i[78860,78873] [2022-11-25 18:10:59,419 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:10:59,551 INFO L208 MainTranslator]: Completed translation [2022-11-25 18:10:59,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:10:59 WrapperNode [2022-11-25 18:10:59,551 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 18:10:59,552 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 18:10:59,553 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 18:10:59,553 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 18:10:59,561 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:10:59" (1/1) ... [2022-11-25 18:10:59,612 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:10:59" (1/1) ... [2022-11-25 18:10:59,653 INFO L138 Inliner]: procedures = 481, calls = 74, calls flagged for inlining = 19, calls inlined = 19, statements flattened = 283 [2022-11-25 18:10:59,654 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 18:10:59,655 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 18:10:59,655 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 18:10:59,655 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 18:10:59,665 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:10:59" (1/1) ... [2022-11-25 18:10:59,666 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:10:59" (1/1) ... [2022-11-25 18:10:59,671 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:10:59" (1/1) ... [2022-11-25 18:10:59,671 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:10:59" (1/1) ... [2022-11-25 18:10:59,686 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:10:59" (1/1) ... [2022-11-25 18:10:59,691 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:10:59" (1/1) ... [2022-11-25 18:10:59,695 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:10:59" (1/1) ... [2022-11-25 18:10:59,697 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:10:59" (1/1) ... [2022-11-25 18:10:59,703 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 18:10:59,704 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 18:10:59,705 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 18:10:59,705 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 18:10:59,706 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:10:59" (1/1) ... [2022-11-25 18:10:59,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:10:59,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ec708e-cdb6-4814-8454-eafe77395b29/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:10:59,749 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ec708e-cdb6-4814-8454-eafe77395b29/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 18:10:59,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ec708e-cdb6-4814-8454-eafe77395b29/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 18:10:59,791 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 18:10:59,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 18:10:59,792 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 18:10:59,792 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 18:10:59,792 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 18:10:59,793 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2022-11-25 18:10:59,793 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2022-11-25 18:10:59,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 18:10:59,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 18:10:59,794 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 18:10:59,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 18:10:59,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 18:10:59,798 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 18:11:00,167 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 18:11:00,169 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 18:11:00,810 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 18:11:00,936 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 18:11:00,936 INFO L300 CfgBuilder]: Removed 7 assume(true) statements. [2022-11-25 18:11:00,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:11:00 BoogieIcfgContainer [2022-11-25 18:11:00,940 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 18:11:00,943 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 18:11:00,943 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 18:11:00,946 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 18:11:00,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:10:58" (1/3) ... [2022-11-25 18:11:00,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3867aa51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:11:00, skipping insertion in model container [2022-11-25 18:11:00,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:10:59" (2/3) ... [2022-11-25 18:11:00,950 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3867aa51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:11:00, skipping insertion in model container [2022-11-25 18:11:00,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:11:00" (3/3) ... [2022-11-25 18:11:00,952 INFO L112 eAbstractionObserver]: Analyzing ICFG safestack_relacy.i [2022-11-25 18:11:00,971 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 18:11:00,972 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 68 error locations. [2022-11-25 18:11:00,972 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 18:11:01,142 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-25 18:11:01,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 339 places, 353 transitions, 714 flow [2022-11-25 18:11:01,413 INFO L130 PetriNetUnfolder]: 19/375 cut-off events. [2022-11-25 18:11:01,413 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 18:11:01,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 381 conditions, 375 events. 19/375 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 860 event pairs, 0 based on Foata normal form. 0/280 useless extension candidates. Maximal degree in co-relation 267. Up to 4 conditions per place. [2022-11-25 18:11:01,427 INFO L82 GeneralOperation]: Start removeDead. Operand has 339 places, 353 transitions, 714 flow [2022-11-25 18:11:01,441 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 339 places, 353 transitions, 714 flow [2022-11-25 18:11:01,446 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:11:01,473 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 339 places, 353 transitions, 714 flow [2022-11-25 18:11:01,482 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 339 places, 353 transitions, 714 flow [2022-11-25 18:11:01,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 339 places, 353 transitions, 714 flow [2022-11-25 18:11:01,588 INFO L130 PetriNetUnfolder]: 19/375 cut-off events. [2022-11-25 18:11:01,588 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 18:11:01,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 381 conditions, 375 events. 19/375 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 860 event pairs, 0 based on Foata normal form. 0/280 useless extension candidates. Maximal degree in co-relation 267. Up to 4 conditions per place. [2022-11-25 18:11:01,601 INFO L119 LiptonReduction]: Number of co-enabled transitions 13440 [2022-11-25 18:11:21,656 INFO L134 LiptonReduction]: Checked pairs total: 26956 [2022-11-25 18:11:21,657 INFO L136 LiptonReduction]: Total number of compositions: 496 [2022-11-25 18:11:21,681 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:11:21,688 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;@2a850cd7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:11:21,688 INFO L358 AbstractCegarLoop]: Starting to check reachability of 124 error locations. [2022-11-25 18:11:21,690 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2022-11-25 18:11:21,691 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:11:21,691 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:11:21,692 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-11-25 18:11:21,692 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 121 more)] === [2022-11-25 18:11:21,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:11:21,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1661, now seen corresponding path program 1 times [2022-11-25 18:11:21,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:11:21,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163342720] [2022-11-25 18:11:21,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:11:21,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:11:21,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:11:21,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:11:22,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:11:22,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163342720] [2022-11-25 18:11:22,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163342720] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:11:22,013 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:11:22,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-25 18:11:22,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910670551] [2022-11-25 18:11:22,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:11:22,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 18:11:22,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:11:22,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 18:11:22,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 18:11:22,065 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 849 [2022-11-25 18:11:22,071 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 113 transitions, 234 flow. Second operand has 2 states, 2 states have (on average 307.5) internal successors, (615), 2 states have internal predecessors, (615), 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) [2022-11-25 18:11:22,072 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:11:22,072 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 849 [2022-11-25 18:11:22,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:11:22,488 INFO L130 PetriNetUnfolder]: 591/1245 cut-off events. [2022-11-25 18:11:22,488 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 18:11:22,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2436 conditions, 1245 events. 591/1245 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 6962 event pairs, 517 based on Foata normal form. 12/513 useless extension candidates. Maximal degree in co-relation 2388. Up to 1185 conditions per place. [2022-11-25 18:11:22,496 INFO L137 encePairwiseOnDemand]: 816/849 looper letters, 74 selfloop transitions, 0 changer transitions 0/80 dead transitions. [2022-11-25 18:11:22,497 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 80 transitions, 316 flow [2022-11-25 18:11:22,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 18:11:22,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-25 18:11:22,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 721 transitions. [2022-11-25 18:11:22,513 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4246171967020024 [2022-11-25 18:11:22,514 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 721 transitions. [2022-11-25 18:11:22,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 721 transitions. [2022-11-25 18:11:22,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:11:22,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 721 transitions. [2022-11-25 18:11:22,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 360.5) internal successors, (721), 2 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:22,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 849.0) internal successors, (2547), 3 states have internal predecessors, (2547), 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) [2022-11-25 18:11:22,539 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 849.0) internal successors, (2547), 3 states have internal predecessors, (2547), 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) [2022-11-25 18:11:22,542 INFO L175 Difference]: Start difference. First operand has 106 places, 113 transitions, 234 flow. Second operand 2 states and 721 transitions. [2022-11-25 18:11:22,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 80 transitions, 316 flow [2022-11-25 18:11:22,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 80 transitions, 316 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 18:11:22,550 INFO L231 Difference]: Finished difference. Result has 76 places, 80 transitions, 168 flow [2022-11-25 18:11:22,553 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=849, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=168, PETRI_PLACES=76, PETRI_TRANSITIONS=80} [2022-11-25 18:11:22,558 INFO L288 CegarLoopForPetriNet]: 106 programPoint places, -30 predicate places. [2022-11-25 18:11:22,558 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 80 transitions, 168 flow [2022-11-25 18:11:22,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 307.5) internal successors, (615), 2 states have internal predecessors, (615), 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) [2022-11-25 18:11:22,566 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:11:22,566 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 18:11:22,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 18:11:22,567 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 121 more)] === [2022-11-25 18:11:22,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:11:22,572 INFO L85 PathProgramCache]: Analyzing trace with hash 53548, now seen corresponding path program 1 times [2022-11-25 18:11:22,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:11:22,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442337739] [2022-11-25 18:11:22,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:11:22,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:11:22,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:11:22,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:11:22,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:11:22,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442337739] [2022-11-25 18:11:22,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442337739] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:11:22,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:11:22,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:11:22,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361423534] [2022-11-25 18:11:22,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:11:22,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:11:22,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:11:22,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:11:22,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:11:22,966 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 849 [2022-11-25 18:11:22,968 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 80 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 299.6666666666667) internal successors, (899), 3 states have internal predecessors, (899), 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) [2022-11-25 18:11:22,968 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:11:22,968 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 849 [2022-11-25 18:11:22,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:11:23,355 INFO L130 PetriNetUnfolder]: 649/1321 cut-off events. [2022-11-25 18:11:23,356 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 18:11:23,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2602 conditions, 1321 events. 649/1321 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 7037 event pairs, 440 based on Foata normal form. 0/597 useless extension candidates. Maximal degree in co-relation 2598. Up to 1033 conditions per place. [2022-11-25 18:11:23,363 INFO L137 encePairwiseOnDemand]: 830/849 looper letters, 82 selfloop transitions, 8 changer transitions 0/94 dead transitions. [2022-11-25 18:11:23,363 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 94 transitions, 379 flow [2022-11-25 18:11:23,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:11:23,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:11:23,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 998 transitions. [2022-11-25 18:11:23,367 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39183352964271695 [2022-11-25 18:11:23,367 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 998 transitions. [2022-11-25 18:11:23,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 998 transitions. [2022-11-25 18:11:23,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:11:23,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 998 transitions. [2022-11-25 18:11:23,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 332.6666666666667) internal successors, (998), 3 states have internal predecessors, (998), 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) [2022-11-25 18:11:23,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 849.0) internal successors, (3396), 4 states have internal predecessors, (3396), 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) [2022-11-25 18:11:23,378 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 849.0) internal successors, (3396), 4 states have internal predecessors, (3396), 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) [2022-11-25 18:11:23,379 INFO L175 Difference]: Start difference. First operand has 76 places, 80 transitions, 168 flow. Second operand 3 states and 998 transitions. [2022-11-25 18:11:23,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 94 transitions, 379 flow [2022-11-25 18:11:23,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 94 transitions, 379 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 18:11:23,383 INFO L231 Difference]: Finished difference. Result has 71 places, 75 transitions, 202 flow [2022-11-25 18:11:23,383 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=849, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=202, PETRI_PLACES=71, PETRI_TRANSITIONS=75} [2022-11-25 18:11:23,384 INFO L288 CegarLoopForPetriNet]: 106 programPoint places, -35 predicate places. [2022-11-25 18:11:23,384 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 75 transitions, 202 flow [2022-11-25 18:11:23,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 299.6666666666667) internal successors, (899), 3 states have internal predecessors, (899), 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) [2022-11-25 18:11:23,386 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:11:23,386 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 18:11:23,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 18:11:23,386 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 121 more)] === [2022-11-25 18:11:23,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:11:23,387 INFO L85 PathProgramCache]: Analyzing trace with hash 53549, now seen corresponding path program 1 times [2022-11-25 18:11:23,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:11:23,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562030828] [2022-11-25 18:11:23,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:11:23,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:11:23,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:11:23,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:11:23,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:11:23,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562030828] [2022-11-25 18:11:23,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562030828] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:11:23,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:11:23,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:11:23,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229028812] [2022-11-25 18:11:23,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:11:23,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:11:23,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:11:23,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:11:23,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:11:23,568 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 302 out of 849 [2022-11-25 18:11:23,569 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 75 transitions, 202 flow. Second operand has 3 states, 3 states have (on average 302.6666666666667) internal successors, (908), 3 states have internal predecessors, (908), 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) [2022-11-25 18:11:23,569 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:11:23,569 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 302 of 849 [2022-11-25 18:11:23,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:11:23,886 INFO L130 PetriNetUnfolder]: 627/1302 cut-off events. [2022-11-25 18:11:23,886 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-11-25 18:11:23,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2772 conditions, 1302 events. 627/1302 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 7070 event pairs, 517 based on Foata normal form. 0/639 useless extension candidates. Maximal degree in co-relation 2766. Up to 1215 conditions per place. [2022-11-25 18:11:23,893 INFO L137 encePairwiseOnDemand]: 845/849 looper letters, 68 selfloop transitions, 2 changer transitions 0/77 dead transitions. [2022-11-25 18:11:23,894 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 77 transitions, 346 flow [2022-11-25 18:11:23,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:11:23,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:11:23,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 975 transitions. [2022-11-25 18:11:23,897 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3828032979976443 [2022-11-25 18:11:23,897 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 975 transitions. [2022-11-25 18:11:23,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 975 transitions. [2022-11-25 18:11:23,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:11:23,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 975 transitions. [2022-11-25 18:11:23,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 325.0) internal successors, (975), 3 states have internal predecessors, (975), 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) [2022-11-25 18:11:23,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 849.0) internal successors, (3396), 4 states have internal predecessors, (3396), 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) [2022-11-25 18:11:23,907 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 849.0) internal successors, (3396), 4 states have internal predecessors, (3396), 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) [2022-11-25 18:11:23,908 INFO L175 Difference]: Start difference. First operand has 71 places, 75 transitions, 202 flow. Second operand 3 states and 975 transitions. [2022-11-25 18:11:23,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 77 transitions, 346 flow [2022-11-25 18:11:23,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 77 transitions, 330 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:11:23,913 INFO L231 Difference]: Finished difference. Result has 72 places, 76 transitions, 200 flow [2022-11-25 18:11:23,914 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=849, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=200, PETRI_PLACES=72, PETRI_TRANSITIONS=76} [2022-11-25 18:11:23,914 INFO L288 CegarLoopForPetriNet]: 106 programPoint places, -34 predicate places. [2022-11-25 18:11:23,915 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 76 transitions, 200 flow [2022-11-25 18:11:23,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 302.6666666666667) internal successors, (908), 3 states have internal predecessors, (908), 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) [2022-11-25 18:11:23,915 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:11:23,916 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 18:11:23,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 18:11:23,916 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 121 more)] === [2022-11-25 18:11:23,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:11:23,917 INFO L85 PathProgramCache]: Analyzing trace with hash 53586, now seen corresponding path program 1 times [2022-11-25 18:11:23,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:11:23,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946563534] [2022-11-25 18:11:23,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:11:23,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:11:23,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:11:24,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:11:24,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:11:24,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946563534] [2022-11-25 18:11:24,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946563534] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:11:24,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:11:24,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:11:24,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601707120] [2022-11-25 18:11:24,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:11:24,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:11:24,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:11:24,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:11:24,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:11:24,233 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 302 out of 849 [2022-11-25 18:11:24,234 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 76 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 302.6666666666667) internal successors, (908), 3 states have internal predecessors, (908), 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) [2022-11-25 18:11:24,234 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:11:24,234 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 302 of 849 [2022-11-25 18:11:24,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:11:24,535 INFO L130 PetriNetUnfolder]: 627/1301 cut-off events. [2022-11-25 18:11:24,535 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 18:11:24,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2692 conditions, 1301 events. 627/1301 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 7040 event pairs, 517 based on Foata normal form. 1/617 useless extension candidates. Maximal degree in co-relation 2685. Up to 1215 conditions per place. [2022-11-25 18:11:24,542 INFO L137 encePairwiseOnDemand]: 846/849 looper letters, 67 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2022-11-25 18:11:24,542 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 76 transitions, 338 flow [2022-11-25 18:11:24,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:11:24,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:11:24,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 973 transitions. [2022-11-25 18:11:24,545 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3820180604632901 [2022-11-25 18:11:24,546 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 973 transitions. [2022-11-25 18:11:24,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 973 transitions. [2022-11-25 18:11:24,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:11:24,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 973 transitions. [2022-11-25 18:11:24,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 324.3333333333333) internal successors, (973), 3 states have internal predecessors, (973), 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) [2022-11-25 18:11:24,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 849.0) internal successors, (3396), 4 states have internal predecessors, (3396), 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) [2022-11-25 18:11:24,555 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 849.0) internal successors, (3396), 4 states have internal predecessors, (3396), 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) [2022-11-25 18:11:24,556 INFO L175 Difference]: Start difference. First operand has 72 places, 76 transitions, 200 flow. Second operand 3 states and 973 transitions. [2022-11-25 18:11:24,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 76 transitions, 338 flow [2022-11-25 18:11:24,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 76 transitions, 334 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-25 18:11:24,559 INFO L231 Difference]: Finished difference. Result has 74 places, 76 transitions, 204 flow [2022-11-25 18:11:24,560 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=849, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=74, PETRI_TRANSITIONS=76} [2022-11-25 18:11:24,560 INFO L288 CegarLoopForPetriNet]: 106 programPoint places, -32 predicate places. [2022-11-25 18:11:24,560 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 76 transitions, 204 flow [2022-11-25 18:11:24,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 302.6666666666667) internal successors, (908), 3 states have internal predecessors, (908), 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) [2022-11-25 18:11:24,561 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:11:24,561 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 18:11:24,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 18:11:24,562 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 121 more)] === [2022-11-25 18:11:24,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:11:24,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1662765, now seen corresponding path program 1 times [2022-11-25 18:11:24,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:11:24,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409370329] [2022-11-25 18:11:24,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:11:24,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:11:24,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:11:24,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:11:24,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:11:24,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409370329] [2022-11-25 18:11:24,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409370329] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:11:24,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625052193] [2022-11-25 18:11:24,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:11:24,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:11:24,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ec708e-cdb6-4814-8454-eafe77395b29/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:11:24,807 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ec708e-cdb6-4814-8454-eafe77395b29/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:11:24,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ec708e-cdb6-4814-8454-eafe77395b29/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 18:11:24,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:11:24,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 18:11:24,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:11:25,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:11:25,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:11:25,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:11:25,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625052193] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:11:25,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:11:25,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-11-25 18:11:25,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272976277] [2022-11-25 18:11:25,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:11:25,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 18:11:25,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:11:25,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 18:11:25,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-25 18:11:26,068 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 849 [2022-11-25 18:11:26,072 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 76 transitions, 204 flow. Second operand has 8 states, 8 states have (on average 300.125) internal successors, (2401), 8 states have internal predecessors, (2401), 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) [2022-11-25 18:11:26,072 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:11:26,072 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 849 [2022-11-25 18:11:26,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:11:26,844 INFO L130 PetriNetUnfolder]: 1250/2560 cut-off events. [2022-11-25 18:11:26,844 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-11-25 18:11:26,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5291 conditions, 2560 events. 1250/2560 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 16468 event pairs, 594 based on Foata normal form. 15/1286 useless extension candidates. Maximal degree in co-relation 5283. Up to 1323 conditions per place. [2022-11-25 18:11:26,859 INFO L137 encePairwiseOnDemand]: 841/849 looper letters, 161 selfloop transitions, 14 changer transitions 0/182 dead transitions. [2022-11-25 18:11:26,859 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 182 transitions, 818 flow [2022-11-25 18:11:26,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:11:26,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 18:11:26,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1971 transitions. [2022-11-25 18:11:26,865 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3869257950530035 [2022-11-25 18:11:26,866 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1971 transitions. [2022-11-25 18:11:26,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1971 transitions. [2022-11-25 18:11:26,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:11:26,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1971 transitions. [2022-11-25 18:11:26,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 328.5) internal successors, (1971), 6 states have internal predecessors, (1971), 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) [2022-11-25 18:11:26,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 849.0) internal successors, (5943), 7 states have internal predecessors, (5943), 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) [2022-11-25 18:11:26,884 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 849.0) internal successors, (5943), 7 states have internal predecessors, (5943), 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) [2022-11-25 18:11:26,884 INFO L175 Difference]: Start difference. First operand has 74 places, 76 transitions, 204 flow. Second operand 6 states and 1971 transitions. [2022-11-25 18:11:26,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 182 transitions, 818 flow [2022-11-25 18:11:26,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 182 transitions, 814 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:11:26,889 INFO L231 Difference]: Finished difference. Result has 80 places, 88 transitions, 291 flow [2022-11-25 18:11:26,889 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=849, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=291, PETRI_PLACES=80, PETRI_TRANSITIONS=88} [2022-11-25 18:11:26,890 INFO L288 CegarLoopForPetriNet]: 106 programPoint places, -26 predicate places. [2022-11-25 18:11:26,890 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 88 transitions, 291 flow [2022-11-25 18:11:26,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 300.125) internal successors, (2401), 8 states have internal predecessors, (2401), 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) [2022-11-25 18:11:26,892 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:11:26,892 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 18:11:26,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ec708e-cdb6-4814-8454-eafe77395b29/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 18:11:27,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ec708e-cdb6-4814-8454-eafe77395b29/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:11:27,098 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 121 more)] === [2022-11-25 18:11:27,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:11:27,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1662728, now seen corresponding path program 1 times [2022-11-25 18:11:27,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:11:27,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357833518] [2022-11-25 18:11:27,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:11:27,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:11:27,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:11:27,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:11:27,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:11:27,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357833518] [2022-11-25 18:11:27,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357833518] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:11:27,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946824335] [2022-11-25 18:11:27,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:11:27,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:11:27,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ec708e-cdb6-4814-8454-eafe77395b29/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:11:27,205 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ec708e-cdb6-4814-8454-eafe77395b29/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:11:27,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ec708e-cdb6-4814-8454-eafe77395b29/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 18:11:27,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:11:27,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 18:11:27,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:11:27,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:11:27,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:11:27,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:11:27,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946824335] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:11:27,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:11:27,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-11-25 18:11:27,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805721258] [2022-11-25 18:11:27,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:11:27,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 18:11:27,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:11:27,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 18:11:27,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-11-25 18:11:27,472 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 300 out of 849 [2022-11-25 18:11:27,475 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 88 transitions, 291 flow. Second operand has 7 states, 7 states have (on average 301.14285714285717) internal successors, (2108), 7 states have internal predecessors, (2108), 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) [2022-11-25 18:11:27,476 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:11:27,476 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 300 of 849 [2022-11-25 18:11:27,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:11:28,001 INFO L130 PetriNetUnfolder]: 1057/2172 cut-off events. [2022-11-25 18:11:28,002 INFO L131 PetriNetUnfolder]: For 44/44 co-relation queries the response was YES. [2022-11-25 18:11:28,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4775 conditions, 2172 events. 1057/2172 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 13345 event pairs, 825 based on Foata normal form. 1/1107 useless extension candidates. Maximal degree in co-relation 4764. Up to 2032 conditions per place. [2022-11-25 18:11:28,014 INFO L137 encePairwiseOnDemand]: 844/849 looper letters, 74 selfloop transitions, 4 changer transitions 0/85 dead transitions. [2022-11-25 18:11:28,014 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 85 transitions, 432 flow [2022-11-25 18:11:28,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:11:28,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:11:28,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1569 transitions. [2022-11-25 18:11:28,020 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3696113074204947 [2022-11-25 18:11:28,020 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1569 transitions. [2022-11-25 18:11:28,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1569 transitions. [2022-11-25 18:11:28,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:11:28,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1569 transitions. [2022-11-25 18:11:28,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 313.8) internal successors, (1569), 5 states have internal predecessors, (1569), 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) [2022-11-25 18:11:28,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 849.0) internal successors, (5094), 6 states have internal predecessors, (5094), 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) [2022-11-25 18:11:28,035 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 849.0) internal successors, (5094), 6 states have internal predecessors, (5094), 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) [2022-11-25 18:11:28,035 INFO L175 Difference]: Start difference. First operand has 80 places, 88 transitions, 291 flow. Second operand 5 states and 1569 transitions. [2022-11-25 18:11:28,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 85 transitions, 432 flow [2022-11-25 18:11:28,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 85 transitions, 422 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-11-25 18:11:28,044 INFO L231 Difference]: Finished difference. Result has 84 places, 85 transitions, 280 flow [2022-11-25 18:11:28,045 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=849, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=280, PETRI_PLACES=84, PETRI_TRANSITIONS=85} [2022-11-25 18:11:28,047 INFO L288 CegarLoopForPetriNet]: 106 programPoint places, -22 predicate places. [2022-11-25 18:11:28,047 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 85 transitions, 280 flow [2022-11-25 18:11:28,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 301.14285714285717) internal successors, (2108), 7 states have internal predecessors, (2108), 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) [2022-11-25 18:11:28,048 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:11:28,049 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1] [2022-11-25 18:11:28,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ec708e-cdb6-4814-8454-eafe77395b29/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 18:11:28,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ec708e-cdb6-4814-8454-eafe77395b29/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-25 18:11:28,260 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 121 more)] === [2022-11-25 18:11:28,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:11:28,261 INFO L85 PathProgramCache]: Analyzing trace with hash 51547277, now seen corresponding path program 2 times [2022-11-25 18:11:28,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:11:28,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719059058] [2022-11-25 18:11:28,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:11:28,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:11:28,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:11:28,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:11:28,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:11:28,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719059058] [2022-11-25 18:11:28,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719059058] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:11:28,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041622101] [2022-11-25 18:11:28,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:11:28,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:11:28,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ec708e-cdb6-4814-8454-eafe77395b29/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:11:28,498 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ec708e-cdb6-4814-8454-eafe77395b29/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:11:28,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ec708e-cdb6-4814-8454-eafe77395b29/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 18:11:28,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 18:11:28,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:11:28,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 18:11:28,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:11:28,675 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 18:11:28,675 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:11:28,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041622101] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:11:28,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 18:11:28,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2022-11-25 18:11:28,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285362050] [2022-11-25 18:11:28,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:11:28,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:11:28,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:11:28,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:11:28,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 18:11:28,842 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 849 [2022-11-25 18:11:28,843 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 85 transitions, 280 flow. Second operand has 3 states, 3 states have (on average 304.0) internal successors, (912), 3 states have internal predecessors, (912), 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) [2022-11-25 18:11:28,843 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:11:28,843 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 849 [2022-11-25 18:11:28,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:11:29,363 INFO L130 PetriNetUnfolder]: 1171/2379 cut-off events. [2022-11-25 18:11:29,363 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-11-25 18:11:29,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5133 conditions, 2379 events. 1171/2379 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 14656 event pairs, 396 based on Foata normal form. 36/1226 useless extension candidates. Maximal degree in co-relation 5120. Up to 1236 conditions per place. [2022-11-25 18:11:29,380 INFO L137 encePairwiseOnDemand]: 842/849 looper letters, 96 selfloop transitions, 10 changer transitions 0/113 dead transitions. [2022-11-25 18:11:29,381 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 113 transitions, 557 flow [2022-11-25 18:11:29,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:11:29,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:11:29,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1005 transitions. [2022-11-25 18:11:29,384 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3945818610129564 [2022-11-25 18:11:29,384 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1005 transitions. [2022-11-25 18:11:29,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1005 transitions. [2022-11-25 18:11:29,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:11:29,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1005 transitions. [2022-11-25 18:11:29,387 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 335.0) internal successors, (1005), 3 states have internal predecessors, (1005), 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) [2022-11-25 18:11:29,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 849.0) internal successors, (3396), 4 states have internal predecessors, (3396), 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) [2022-11-25 18:11:29,393 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 849.0) internal successors, (3396), 4 states have internal predecessors, (3396), 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) [2022-11-25 18:11:29,393 INFO L175 Difference]: Start difference. First operand has 84 places, 85 transitions, 280 flow. Second operand 3 states and 1005 transitions. [2022-11-25 18:11:29,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 113 transitions, 557 flow [2022-11-25 18:11:29,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 113 transitions, 545 flow, removed 2 selfloop flow, removed 4 redundant places. [2022-11-25 18:11:29,398 INFO L231 Difference]: Finished difference. Result has 82 places, 87 transitions, 314 flow [2022-11-25 18:11:29,398 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=849, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=314, PETRI_PLACES=82, PETRI_TRANSITIONS=87} [2022-11-25 18:11:29,399 INFO L288 CegarLoopForPetriNet]: 106 programPoint places, -24 predicate places. [2022-11-25 18:11:29,399 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 87 transitions, 314 flow [2022-11-25 18:11:29,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 304.0) internal successors, (912), 3 states have internal predecessors, (912), 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) [2022-11-25 18:11:29,400 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:11:29,400 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2022-11-25 18:11:29,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ec708e-cdb6-4814-8454-eafe77395b29/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 18:11:29,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ec708e-cdb6-4814-8454-eafe77395b29/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:11:29,606 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 121 more)] === [2022-11-25 18:11:29,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:11:29,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1597967457, now seen corresponding path program 1 times [2022-11-25 18:11:29,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:11:29,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603263472] [2022-11-25 18:11:29,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:11:29,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:11:29,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:11:29,799 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 18:11:29,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:11:29,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603263472] [2022-11-25 18:11:29,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603263472] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:11:29,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:11:29,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:11:29,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200967664] [2022-11-25 18:11:29,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:11:29,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:11:29,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:11:29,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:11:29,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:11:29,997 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 294 out of 849 [2022-11-25 18:11:29,999 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 87 transitions, 314 flow. Second operand has 4 states, 4 states have (on average 295.0) internal successors, (1180), 4 states have internal predecessors, (1180), 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) [2022-11-25 18:11:29,999 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:11:29,999 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 294 of 849 [2022-11-25 18:11:29,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:11:30,476 INFO L130 PetriNetUnfolder]: 964/1996 cut-off events. [2022-11-25 18:11:30,476 INFO L131 PetriNetUnfolder]: For 161/161 co-relation queries the response was YES. [2022-11-25 18:11:30,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4520 conditions, 1996 events. 964/1996 cut-off events. For 161/161 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 12394 event pairs, 276 based on Foata normal form. 0/1027 useless extension candidates. Maximal degree in co-relation 4507. Up to 1200 conditions per place. [2022-11-25 18:11:30,497 INFO L137 encePairwiseOnDemand]: 837/849 looper letters, 107 selfloop transitions, 23 changer transitions 3/140 dead transitions. [2022-11-25 18:11:30,497 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 140 transitions, 748 flow [2022-11-25 18:11:30,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:11:30,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:11:30,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1295 transitions. [2022-11-25 18:11:30,501 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38133097762073026 [2022-11-25 18:11:30,501 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1295 transitions. [2022-11-25 18:11:30,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1295 transitions. [2022-11-25 18:11:30,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:11:30,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1295 transitions. [2022-11-25 18:11:30,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 323.75) internal successors, (1295), 4 states have internal predecessors, (1295), 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) [2022-11-25 18:11:30,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 849.0) internal successors, (4245), 5 states have internal predecessors, (4245), 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) [2022-11-25 18:11:30,513 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 849.0) internal successors, (4245), 5 states have internal predecessors, (4245), 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) [2022-11-25 18:11:30,514 INFO L175 Difference]: Start difference. First operand has 82 places, 87 transitions, 314 flow. Second operand 4 states and 1295 transitions. [2022-11-25 18:11:30,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 140 transitions, 748 flow [2022-11-25 18:11:30,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 140 transitions, 723 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-11-25 18:11:30,518 INFO L231 Difference]: Finished difference. Result has 86 places, 99 transitions, 453 flow [2022-11-25 18:11:30,519 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=849, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=453, PETRI_PLACES=86, PETRI_TRANSITIONS=99} [2022-11-25 18:11:30,519 INFO L288 CegarLoopForPetriNet]: 106 programPoint places, -20 predicate places. [2022-11-25 18:11:30,519 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 99 transitions, 453 flow [2022-11-25 18:11:30,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 295.0) internal successors, (1180), 4 states have internal predecessors, (1180), 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) [2022-11-25 18:11:30,520 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:11:30,520 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2022-11-25 18:11:30,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 18:11:30,520 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 121 more)] === [2022-11-25 18:11:30,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:11:30,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1597967456, now seen corresponding path program 1 times [2022-11-25 18:11:30,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:11:30,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835790278] [2022-11-25 18:11:30,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:11:30,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:11:30,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:11:30,599 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 18:11:30,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:11:30,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835790278] [2022-11-25 18:11:30,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835790278] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:11:30,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:11:30,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:11:30,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656002770] [2022-11-25 18:11:30,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:11:30,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:11:30,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:11:30,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:11:30,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:11:30,703 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 302 out of 849 [2022-11-25 18:11:30,711 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 99 transitions, 453 flow. Second operand has 3 states, 3 states have (on average 303.3333333333333) internal successors, (910), 3 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:30,711 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:11:30,711 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 302 of 849 [2022-11-25 18:11:30,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:11:31,212 INFO L130 PetriNetUnfolder]: 1095/2283 cut-off events. [2022-11-25 18:11:31,212 INFO L131 PetriNetUnfolder]: For 816/816 co-relation queries the response was YES. [2022-11-25 18:11:31,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5753 conditions, 2283 events. 1095/2283 cut-off events. For 816/816 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 13607 event pairs, 427 based on Foata normal form. 0/1467 useless extension candidates. Maximal degree in co-relation 5738. Up to 1158 conditions per place. [2022-11-25 18:11:31,231 INFO L137 encePairwiseOnDemand]: 843/849 looper letters, 137 selfloop transitions, 4 changer transitions 0/148 dead transitions. [2022-11-25 18:11:31,231 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 148 transitions, 860 flow [2022-11-25 18:11:31,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:11:31,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:11:31,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1025 transitions. [2022-11-25 18:11:31,235 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40243423635649783 [2022-11-25 18:11:31,235 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1025 transitions. [2022-11-25 18:11:31,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1025 transitions. [2022-11-25 18:11:31,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:11:31,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1025 transitions. [2022-11-25 18:11:31,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 341.6666666666667) internal successors, (1025), 3 states have internal predecessors, (1025), 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) [2022-11-25 18:11:31,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 849.0) internal successors, (3396), 4 states have internal predecessors, (3396), 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) [2022-11-25 18:11:31,244 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 849.0) internal successors, (3396), 4 states have internal predecessors, (3396), 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) [2022-11-25 18:11:31,245 INFO L175 Difference]: Start difference. First operand has 86 places, 99 transitions, 453 flow. Second operand 3 states and 1025 transitions. [2022-11-25 18:11:31,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 148 transitions, 860 flow [2022-11-25 18:11:31,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 148 transitions, 822 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:11:31,251 INFO L231 Difference]: Finished difference. Result has 87 places, 102 transitions, 449 flow [2022-11-25 18:11:31,251 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=849, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=449, PETRI_PLACES=87, PETRI_TRANSITIONS=102} [2022-11-25 18:11:31,252 INFO L288 CegarLoopForPetriNet]: 106 programPoint places, -19 predicate places. [2022-11-25 18:11:31,252 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 102 transitions, 449 flow [2022-11-25 18:11:31,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 303.3333333333333) internal successors, (910), 3 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:11:31,253 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:11:31,253 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-11-25 18:11:31,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 18:11:31,253 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 121 more)] === [2022-11-25 18:11:31,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:11:31,254 INFO L85 PathProgramCache]: Analyzing trace with hash -2002587630, now seen corresponding path program 2 times [2022-11-25 18:11:31,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:11:31,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972766832] [2022-11-25 18:11:31,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:11:31,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:11:31,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:11:31,417 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:11:31,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:11:31,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972766832] [2022-11-25 18:11:31,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972766832] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:11:31,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227352731] [2022-11-25 18:11:31,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:11:31,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:11:31,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ec708e-cdb6-4814-8454-eafe77395b29/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:11:31,423 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ec708e-cdb6-4814-8454-eafe77395b29/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:11:31,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ec708e-cdb6-4814-8454-eafe77395b29/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 18:11:31,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:11:31,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:11:31,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 18:11:31,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:11:31,629 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:11:31,629 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:11:31,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227352731] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:11:31,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 18:11:31,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 9 [2022-11-25 18:11:31,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61331348] [2022-11-25 18:11:31,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:11:31,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:11:31,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:11:31,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:11:31,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-25 18:11:31,669 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 301 out of 849 [2022-11-25 18:11:31,671 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 102 transitions, 449 flow. Second operand has 5 states, 5 states have (on average 302.2) internal successors, (1511), 5 states have internal predecessors, (1511), 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) [2022-11-25 18:11:31,671 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:11:31,671 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 301 of 849 [2022-11-25 18:11:31,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:11:32,019 INFO L130 PetriNetUnfolder]: 914/1899 cut-off events. [2022-11-25 18:11:32,019 INFO L131 PetriNetUnfolder]: For 695/695 co-relation queries the response was YES. [2022-11-25 18:11:32,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4816 conditions, 1899 events. 914/1899 cut-off events. For 695/695 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 11363 event pairs, 622 based on Foata normal form. 1/1263 useless extension candidates. Maximal degree in co-relation 4800. Up to 1790 conditions per place. [2022-11-25 18:11:32,032 INFO L137 encePairwiseOnDemand]: 847/849 looper letters, 76 selfloop transitions, 3 changer transitions 0/86 dead transitions. [2022-11-25 18:11:32,032 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 86 transitions, 488 flow [2022-11-25 18:11:32,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:11:32,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:11:32,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1570 transitions. [2022-11-25 18:11:32,038 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36984687868080096 [2022-11-25 18:11:32,038 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1570 transitions. [2022-11-25 18:11:32,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1570 transitions. [2022-11-25 18:11:32,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:11:32,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1570 transitions. [2022-11-25 18:11:32,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 314.0) internal successors, (1570), 5 states have internal predecessors, (1570), 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) [2022-11-25 18:11:32,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 849.0) internal successors, (5094), 6 states have internal predecessors, (5094), 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) [2022-11-25 18:11:32,051 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 849.0) internal successors, (5094), 6 states have internal predecessors, (5094), 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) [2022-11-25 18:11:32,051 INFO L175 Difference]: Start difference. First operand has 87 places, 102 transitions, 449 flow. Second operand 5 states and 1570 transitions. [2022-11-25 18:11:32,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 86 transitions, 488 flow [2022-11-25 18:11:32,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 86 transitions, 468 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 18:11:32,055 INFO L231 Difference]: Finished difference. Result has 84 places, 86 transitions, 316 flow [2022-11-25 18:11:32,056 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=849, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=316, PETRI_PLACES=84, PETRI_TRANSITIONS=86} [2022-11-25 18:11:32,056 INFO L288 CegarLoopForPetriNet]: 106 programPoint places, -22 predicate places. [2022-11-25 18:11:32,056 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 86 transitions, 316 flow [2022-11-25 18:11:32,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 302.2) internal successors, (1511), 5 states have internal predecessors, (1511), 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) [2022-11-25 18:11:32,057 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:11:32,057 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-11-25 18:11:32,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ec708e-cdb6-4814-8454-eafe77395b29/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 18:11:32,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ec708e-cdb6-4814-8454-eafe77395b29/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:11:32,264 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 121 more)] === [2022-11-25 18:11:32,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:11:32,264 INFO L85 PathProgramCache]: Analyzing trace with hash -367880592, now seen corresponding path program 1 times [2022-11-25 18:11:32,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:11:32,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883158397] [2022-11-25 18:11:32,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:11:32,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:11:32,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:11:32,528 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 18:11:32,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:11:32,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883158397] [2022-11-25 18:11:32,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883158397] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:11:32,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689035106] [2022-11-25 18:11:32,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:11:32,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:11:32,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ec708e-cdb6-4814-8454-eafe77395b29/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:11:32,531 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ec708e-cdb6-4814-8454-eafe77395b29/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:11:32,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ec708e-cdb6-4814-8454-eafe77395b29/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 18:11:32,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:11:32,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 18:11:32,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:11:32,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 18:11:32,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:11:32,882 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 18:11:32,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689035106] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:11:32,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:11:32,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2022-11-25 18:11:32,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486361541] [2022-11-25 18:11:32,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:11:32,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 18:11:32,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:11:32,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 18:11:32,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-25 18:11:33,802 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 289 out of 849 [2022-11-25 18:11:33,805 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 86 transitions, 316 flow. Second operand has 11 states, 11 states have (on average 290.90909090909093) internal successors, (3200), 11 states have internal predecessors, (3200), 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) [2022-11-25 18:11:33,805 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:11:33,805 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 289 of 849 [2022-11-25 18:11:33,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:11:34,524 INFO L130 PetriNetUnfolder]: 910/2011 cut-off events. [2022-11-25 18:11:34,524 INFO L131 PetriNetUnfolder]: For 673/673 co-relation queries the response was YES. [2022-11-25 18:11:34,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4975 conditions, 2011 events. 910/2011 cut-off events. For 673/673 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 13048 event pairs, 488 based on Foata normal form. 26/1344 useless extension candidates. Maximal degree in co-relation 4962. Up to 1458 conditions per place. [2022-11-25 18:11:34,536 INFO L137 encePairwiseOnDemand]: 838/849 looper letters, 144 selfloop transitions, 16 changer transitions 0/167 dead transitions. [2022-11-25 18:11:34,537 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 167 transitions, 853 flow [2022-11-25 18:11:34,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:11:34,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 18:11:34,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1883 transitions. [2022-11-25 18:11:34,543 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3696505692972124 [2022-11-25 18:11:34,543 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1883 transitions. [2022-11-25 18:11:34,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1883 transitions. [2022-11-25 18:11:34,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:11:34,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1883 transitions. [2022-11-25 18:11:34,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 313.8333333333333) internal successors, (1883), 6 states have internal predecessors, (1883), 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) [2022-11-25 18:11:34,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 849.0) internal successors, (5943), 7 states have internal predecessors, (5943), 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) [2022-11-25 18:11:34,557 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 849.0) internal successors, (5943), 7 states have internal predecessors, (5943), 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) [2022-11-25 18:11:34,557 INFO L175 Difference]: Start difference. First operand has 84 places, 86 transitions, 316 flow. Second operand 6 states and 1883 transitions. [2022-11-25 18:11:34,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 167 transitions, 853 flow [2022-11-25 18:11:34,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 167 transitions, 838 flow, removed 5 selfloop flow, removed 3 redundant places. [2022-11-25 18:11:34,562 INFO L231 Difference]: Finished difference. Result has 89 places, 90 transitions, 382 flow [2022-11-25 18:11:34,563 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=849, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=382, PETRI_PLACES=89, PETRI_TRANSITIONS=90} [2022-11-25 18:11:34,563 INFO L288 CegarLoopForPetriNet]: 106 programPoint places, -17 predicate places. [2022-11-25 18:11:34,564 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 90 transitions, 382 flow [2022-11-25 18:11:34,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 290.90909090909093) internal successors, (3200), 11 states have internal predecessors, (3200), 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) [2022-11-25 18:11:34,565 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:11:34,565 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2022-11-25 18:11:34,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ec708e-cdb6-4814-8454-eafe77395b29/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 18:11:34,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ec708e-cdb6-4814-8454-eafe77395b29/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:11:34,775 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 121 more)] === [2022-11-25 18:11:34,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:11:34,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1480604647, now seen corresponding path program 1 times [2022-11-25 18:11:34,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:11:34,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931674230] [2022-11-25 18:11:34,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:11:34,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:11:34,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:11:34,806 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 18:11:34,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:11:34,862 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 18:11:34,863 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 18:11:34,864 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (123 of 124 remaining) [2022-11-25 18:11:34,865 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (122 of 124 remaining) [2022-11-25 18:11:34,866 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (121 of 124 remaining) [2022-11-25 18:11:34,866 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (120 of 124 remaining) [2022-11-25 18:11:34,866 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (119 of 124 remaining) [2022-11-25 18:11:34,866 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (118 of 124 remaining) [2022-11-25 18:11:34,867 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (117 of 124 remaining) [2022-11-25 18:11:34,867 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (116 of 124 remaining) [2022-11-25 18:11:34,867 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (115 of 124 remaining) [2022-11-25 18:11:34,867 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (114 of 124 remaining) [2022-11-25 18:11:34,867 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (113 of 124 remaining) [2022-11-25 18:11:34,868 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (112 of 124 remaining) [2022-11-25 18:11:34,868 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (111 of 124 remaining) [2022-11-25 18:11:34,868 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (110 of 124 remaining) [2022-11-25 18:11:34,869 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (109 of 124 remaining) [2022-11-25 18:11:34,869 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (108 of 124 remaining) [2022-11-25 18:11:34,869 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (107 of 124 remaining) [2022-11-25 18:11:34,869 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (106 of 124 remaining) [2022-11-25 18:11:34,869 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr32ASSERT_VIOLATIONMEMORY_LEAK (105 of 124 remaining) [2022-11-25 18:11:34,870 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (104 of 124 remaining) [2022-11-25 18:11:34,870 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (103 of 124 remaining) [2022-11-25 18:11:34,870 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (102 of 124 remaining) [2022-11-25 18:11:34,871 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (101 of 124 remaining) [2022-11-25 18:11:34,871 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (100 of 124 remaining) [2022-11-25 18:11:34,871 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (99 of 124 remaining) [2022-11-25 18:11:34,871 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (98 of 124 remaining) [2022-11-25 18:11:34,871 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (97 of 124 remaining) [2022-11-25 18:11:34,871 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (96 of 124 remaining) [2022-11-25 18:11:34,872 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE (95 of 124 remaining) [2022-11-25 18:11:34,872 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr49REQUIRES_VIOLATIONMEMORY_DEREFERENCE (94 of 124 remaining) [2022-11-25 18:11:34,872 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE (93 of 124 remaining) [2022-11-25 18:11:34,872 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE (92 of 124 remaining) [2022-11-25 18:11:34,872 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr52REQUIRES_VIOLATIONMEMORY_DEREFERENCE (91 of 124 remaining) [2022-11-25 18:11:34,872 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr53REQUIRES_VIOLATIONMEMORY_DEREFERENCE (90 of 124 remaining) [2022-11-25 18:11:34,872 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr54REQUIRES_VIOLATIONMEMORY_DEREFERENCE (89 of 124 remaining) [2022-11-25 18:11:34,872 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (88 of 124 remaining) [2022-11-25 18:11:34,872 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (87 of 124 remaining) [2022-11-25 18:11:34,873 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (86 of 124 remaining) [2022-11-25 18:11:34,873 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (85 of 124 remaining) [2022-11-25 18:11:34,873 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr39REQUIRES_VIOLATIONMEMORY_DEREFERENCE (84 of 124 remaining) [2022-11-25 18:11:34,873 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr40REQUIRES_VIOLATIONMEMORY_DEREFERENCE (83 of 124 remaining) [2022-11-25 18:11:34,873 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr41REQUIRES_VIOLATIONMEMORY_DEREFERENCE (82 of 124 remaining) [2022-11-25 18:11:34,873 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr42REQUIRES_VIOLATIONMEMORY_DEREFERENCE (81 of 124 remaining) [2022-11-25 18:11:34,873 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr43REQUIRES_VIOLATIONMEMORY_DEREFERENCE (80 of 124 remaining) [2022-11-25 18:11:34,873 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr44REQUIRES_VIOLATIONMEMORY_DEREFERENCE (79 of 124 remaining) [2022-11-25 18:11:34,874 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr45REQUIRES_VIOLATIONMEMORY_DEREFERENCE (78 of 124 remaining) [2022-11-25 18:11:34,874 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr46REQUIRES_VIOLATIONMEMORY_DEREFERENCE (77 of 124 remaining) [2022-11-25 18:11:34,874 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE (76 of 124 remaining) [2022-11-25 18:11:34,874 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr48REQUIRES_VIOLATIONMEMORY_DEREFERENCE (75 of 124 remaining) [2022-11-25 18:11:34,874 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (74 of 124 remaining) [2022-11-25 18:11:34,874 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (73 of 124 remaining) [2022-11-25 18:11:34,874 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (72 of 124 remaining) [2022-11-25 18:11:34,874 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (71 of 124 remaining) [2022-11-25 18:11:34,875 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (70 of 124 remaining) [2022-11-25 18:11:34,875 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (69 of 124 remaining) [2022-11-25 18:11:34,875 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 124 remaining) [2022-11-25 18:11:34,875 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 124 remaining) [2022-11-25 18:11:34,875 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 124 remaining) [2022-11-25 18:11:34,875 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 124 remaining) [2022-11-25 18:11:34,875 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 124 remaining) [2022-11-25 18:11:34,875 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 124 remaining) [2022-11-25 18:11:34,876 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 124 remaining) [2022-11-25 18:11:34,876 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 124 remaining) [2022-11-25 18:11:34,876 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 124 remaining) [2022-11-25 18:11:34,876 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 124 remaining) [2022-11-25 18:11:34,876 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 124 remaining) [2022-11-25 18:11:34,876 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 124 remaining) [2022-11-25 18:11:34,876 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 124 remaining) [2022-11-25 18:11:34,876 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 124 remaining) [2022-11-25 18:11:34,876 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 124 remaining) [2022-11-25 18:11:34,877 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 124 remaining) [2022-11-25 18:11:34,877 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 124 remaining) [2022-11-25 18:11:34,877 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 124 remaining) [2022-11-25 18:11:34,877 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr32ASSERT_VIOLATIONMEMORY_LEAK (50 of 124 remaining) [2022-11-25 18:11:34,877 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 124 remaining) [2022-11-25 18:11:34,877 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 124 remaining) [2022-11-25 18:11:34,877 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 124 remaining) [2022-11-25 18:11:34,877 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 124 remaining) [2022-11-25 18:11:34,878 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 124 remaining) [2022-11-25 18:11:34,878 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 124 remaining) [2022-11-25 18:11:34,878 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 124 remaining) [2022-11-25 18:11:34,878 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 124 remaining) [2022-11-25 18:11:34,878 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 124 remaining) [2022-11-25 18:11:34,878 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 124 remaining) [2022-11-25 18:11:34,878 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr49REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 124 remaining) [2022-11-25 18:11:34,879 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 124 remaining) [2022-11-25 18:11:34,879 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 124 remaining) [2022-11-25 18:11:34,879 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr52REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 124 remaining) [2022-11-25 18:11:34,879 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr53REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 124 remaining) [2022-11-25 18:11:34,879 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr54REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 124 remaining) [2022-11-25 18:11:34,879 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 124 remaining) [2022-11-25 18:11:34,879 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 124 remaining) [2022-11-25 18:11:34,879 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 124 remaining) [2022-11-25 18:11:34,880 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 124 remaining) [2022-11-25 18:11:34,880 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr39REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 124 remaining) [2022-11-25 18:11:34,880 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr40REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 124 remaining) [2022-11-25 18:11:34,880 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr41REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 124 remaining) [2022-11-25 18:11:34,880 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr42REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 124 remaining) [2022-11-25 18:11:34,880 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr43REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 124 remaining) [2022-11-25 18:11:34,880 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr44REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 124 remaining) [2022-11-25 18:11:34,880 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr45REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 124 remaining) [2022-11-25 18:11:34,881 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr46REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 124 remaining) [2022-11-25 18:11:34,881 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 124 remaining) [2022-11-25 18:11:34,881 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr48REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 124 remaining) [2022-11-25 18:11:34,881 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 124 remaining) [2022-11-25 18:11:34,881 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 124 remaining) [2022-11-25 18:11:34,881 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 124 remaining) [2022-11-25 18:11:34,881 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 124 remaining) [2022-11-25 18:11:34,881 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 124 remaining) [2022-11-25 18:11:34,881 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 124 remaining) [2022-11-25 18:11:34,882 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 124 remaining) [2022-11-25 18:11:34,882 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 124 remaining) [2022-11-25 18:11:34,882 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 124 remaining) [2022-11-25 18:11:34,882 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 124 remaining) [2022-11-25 18:11:34,882 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 124 remaining) [2022-11-25 18:11:34,882 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 124 remaining) [2022-11-25 18:11:34,882 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 124 remaining) [2022-11-25 18:11:34,883 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 124 remaining) [2022-11-25 18:11:34,883 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 124 remaining) [2022-11-25 18:11:34,883 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 124 remaining) [2022-11-25 18:11:34,883 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 124 remaining) [2022-11-25 18:11:34,883 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 124 remaining) [2022-11-25 18:11:34,883 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 124 remaining) [2022-11-25 18:11:34,884 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 124 remaining) [2022-11-25 18:11:34,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-25 18:11:34,884 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:11:34,887 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 18:11:34,887 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-25 18:11:34,980 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 18:11:34,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 570 places, 595 transitions, 1208 flow [2022-11-25 18:11:35,180 INFO L130 PetriNetUnfolder]: 36/667 cut-off events. [2022-11-25 18:11:35,180 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-25 18:11:35,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 681 conditions, 667 events. 36/667 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2562 event pairs, 0 based on Foata normal form. 0/491 useless extension candidates. Maximal degree in co-relation 526. Up to 8 conditions per place. [2022-11-25 18:11:35,192 INFO L82 GeneralOperation]: Start removeDead. Operand has 570 places, 595 transitions, 1208 flow [2022-11-25 18:11:35,203 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 570 places, 595 transitions, 1208 flow [2022-11-25 18:11:35,203 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:11:35,203 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 570 places, 595 transitions, 1208 flow [2022-11-25 18:11:35,203 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 570 places, 595 transitions, 1208 flow [2022-11-25 18:11:35,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 570 places, 595 transitions, 1208 flow [2022-11-25 18:11:35,374 INFO L130 PetriNetUnfolder]: 36/667 cut-off events. [2022-11-25 18:11:35,374 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-25 18:11:35,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 681 conditions, 667 events. 36/667 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2562 event pairs, 0 based on Foata normal form. 0/491 useless extension candidates. Maximal degree in co-relation 526. Up to 8 conditions per place. [2022-11-25 18:11:35,448 INFO L119 LiptonReduction]: Number of co-enabled transitions 147360 [2022-11-25 18:12:11,046 INFO L134 LiptonReduction]: Checked pairs total: 342280 [2022-11-25 18:12:11,046 INFO L136 LiptonReduction]: Total number of compositions: 864 [2022-11-25 18:12:11,048 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:12:11,049 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;@2a850cd7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:12:11,049 INFO L358 AbstractCegarLoop]: Starting to check reachability of 179 error locations. [2022-11-25 18:12:11,050 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2022-11-25 18:12:11,050 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:12:11,050 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:12:11,051 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-11-25 18:12:11,051 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 176 more)] === [2022-11-25 18:12:11,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:12:11,051 INFO L85 PathProgramCache]: Analyzing trace with hash 3313, now seen corresponding path program 1 times [2022-11-25 18:12:11,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:12:11,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732991741] [2022-11-25 18:12:11,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:12:11,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:12:11,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:12:11,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:12:11,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:12:11,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732991741] [2022-11-25 18:12:11,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732991741] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:12:11,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:12:11,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-25 18:12:11,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475680996] [2022-11-25 18:12:11,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:12:11,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 18:12:11,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:12:11,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 18:12:11,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 18:12:11,072 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 506 out of 1459 [2022-11-25 18:12:11,073 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 205 transitions, 428 flow. Second operand has 2 states, 2 states have (on average 506.5) internal successors, (1013), 2 states have internal predecessors, (1013), 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) [2022-11-25 18:12:11,073 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:12:11,074 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 506 of 1459 [2022-11-25 18:12:11,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:12:21,138 INFO L130 PetriNetUnfolder]: 58687/90572 cut-off events. [2022-11-25 18:12:21,138 INFO L131 PetriNetUnfolder]: For 396/396 co-relation queries the response was YES. [2022-11-25 18:12:21,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177565 conditions, 90572 events. 58687/90572 cut-off events. For 396/396 co-relation queries the response was YES. Maximal size of possible extension queue 2705. Compared 716201 event pairs, 51672 based on Foata normal form. 1161/38478 useless extension candidates. Maximal degree in co-relation 158595. Up to 86743 conditions per place. [2022-11-25 18:12:21,674 INFO L137 encePairwiseOnDemand]: 1401/1459 looper letters, 128 selfloop transitions, 0 changer transitions 0/147 dead transitions. [2022-11-25 18:12:21,675 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 147 transitions, 568 flow [2022-11-25 18:12:21,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 18:12:21,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-25 18:12:21,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1198 transitions. [2022-11-25 18:12:21,679 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4105551747772447 [2022-11-25 18:12:21,679 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1198 transitions. [2022-11-25 18:12:21,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1198 transitions. [2022-11-25 18:12:21,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:12:21,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1198 transitions. [2022-11-25 18:12:21,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 599.0) internal successors, (1198), 2 states have internal predecessors, (1198), 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) [2022-11-25 18:12:21,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1459.0) internal successors, (4377), 3 states have internal predecessors, (4377), 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) [2022-11-25 18:12:21,692 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1459.0) internal successors, (4377), 3 states have internal predecessors, (4377), 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) [2022-11-25 18:12:21,692 INFO L175 Difference]: Start difference. First operand has 189 places, 205 transitions, 428 flow. Second operand 2 states and 1198 transitions. [2022-11-25 18:12:21,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 147 transitions, 568 flow [2022-11-25 18:12:21,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 147 transitions, 568 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 18:12:21,697 INFO L231 Difference]: Finished difference. Result has 138 places, 147 transitions, 312 flow [2022-11-25 18:12:21,698 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1459, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=312, PETRI_PLACES=138, PETRI_TRANSITIONS=147} [2022-11-25 18:12:21,699 INFO L288 CegarLoopForPetriNet]: 189 programPoint places, -51 predicate places. [2022-11-25 18:12:21,700 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 147 transitions, 312 flow [2022-11-25 18:12:21,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 506.5) internal successors, (1013), 2 states have internal predecessors, (1013), 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) [2022-11-25 18:12:21,700 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:12:21,701 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 18:12:21,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-25 18:12:21,701 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 176 more)] === [2022-11-25 18:12:21,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:12:21,702 INFO L85 PathProgramCache]: Analyzing trace with hash 106896, now seen corresponding path program 1 times [2022-11-25 18:12:21,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:12:21,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465764067] [2022-11-25 18:12:21,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:12:21,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:12:21,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:12:21,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:12:21,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:12:21,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465764067] [2022-11-25 18:12:21,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465764067] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:12:21,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:12:21,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:12:21,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308356456] [2022-11-25 18:12:21,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:12:21,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:12:21,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:12:21,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:12:21,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:12:22,059 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 499 out of 1459 [2022-11-25 18:12:22,061 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 147 transitions, 312 flow. Second operand has 3 states, 3 states have (on average 499.6666666666667) internal successors, (1499), 3 states have internal predecessors, (1499), 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) [2022-11-25 18:12:22,061 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:12:22,062 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 499 of 1459 [2022-11-25 18:12:22,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:12:31,567 INFO L130 PetriNetUnfolder]: 66145/102350 cut-off events. [2022-11-25 18:12:31,567 INFO L131 PetriNetUnfolder]: For 517/517 co-relation queries the response was YES. [2022-11-25 18:12:31,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200320 conditions, 102350 events. 66145/102350 cut-off events. For 517/517 co-relation queries the response was YES. Maximal size of possible extension queue 2984. Compared 826052 event pairs, 24190 based on Foata normal form. 0/43026 useless extension candidates. Maximal degree in co-relation 200315. Up to 87553 conditions per place. [2022-11-25 18:12:32,055 INFO L137 encePairwiseOnDemand]: 1448/1459 looper letters, 181 selfloop transitions, 6 changer transitions 0/206 dead transitions. [2022-11-25 18:12:32,055 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 206 transitions, 818 flow [2022-11-25 18:12:32,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:12:32,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:12:32,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1689 transitions. [2022-11-25 18:12:32,062 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3858807402330363 [2022-11-25 18:12:32,063 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1689 transitions. [2022-11-25 18:12:32,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1689 transitions. [2022-11-25 18:12:32,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:12:32,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1689 transitions. [2022-11-25 18:12:32,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 563.0) internal successors, (1689), 3 states have internal predecessors, (1689), 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) [2022-11-25 18:12:32,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1459.0) internal successors, (5836), 4 states have internal predecessors, (5836), 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) [2022-11-25 18:12:32,076 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1459.0) internal successors, (5836), 4 states have internal predecessors, (5836), 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) [2022-11-25 18:12:32,077 INFO L175 Difference]: Start difference. First operand has 138 places, 147 transitions, 312 flow. Second operand 3 states and 1689 transitions. [2022-11-25 18:12:32,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 206 transitions, 818 flow [2022-11-25 18:12:32,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 206 transitions, 818 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 18:12:32,081 INFO L231 Difference]: Finished difference. Result has 141 places, 152 transitions, 360 flow [2022-11-25 18:12:32,081 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1459, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=360, PETRI_PLACES=141, PETRI_TRANSITIONS=152} [2022-11-25 18:12:32,083 INFO L288 CegarLoopForPetriNet]: 189 programPoint places, -48 predicate places. [2022-11-25 18:12:32,083 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 152 transitions, 360 flow [2022-11-25 18:12:32,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 499.6666666666667) internal successors, (1499), 3 states have internal predecessors, (1499), 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) [2022-11-25 18:12:32,084 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:12:32,084 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 18:12:32,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-25 18:12:32,085 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 176 more)] === [2022-11-25 18:12:32,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:12:32,085 INFO L85 PathProgramCache]: Analyzing trace with hash 106889, now seen corresponding path program 1 times [2022-11-25 18:12:32,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:12:32,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303238917] [2022-11-25 18:12:32,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:12:32,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:12:32,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:12:32,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:12:32,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:12:32,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303238917] [2022-11-25 18:12:32,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303238917] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:12:32,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:12:32,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:12:32,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535459009] [2022-11-25 18:12:32,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:12:32,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:12:32,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:12:32,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:12:32,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:12:32,191 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 501 out of 1459 [2022-11-25 18:12:32,193 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 152 transitions, 360 flow. Second operand has 3 states, 3 states have (on average 501.6666666666667) internal successors, (1505), 3 states have internal predecessors, (1505), 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) [2022-11-25 18:12:32,193 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:12:32,193 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 501 of 1459 [2022-11-25 18:12:32,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand