./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/mult-flipped-dist.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/mult-flipped-dist.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0d10bf8c0e842192a13f4b6638f03cf57668d5bee07d0b49c4b595de1c605066 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 11:08:46,770 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 11:08:46,771 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 11:08:46,789 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 11:08:46,789 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 11:08:46,790 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 11:08:46,791 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 11:08:46,793 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 11:08:46,794 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 11:08:46,795 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 11:08:46,796 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 11:08:46,797 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 11:08:46,797 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 11:08:46,798 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 11:08:46,799 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 11:08:46,800 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 11:08:46,801 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 11:08:46,802 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 11:08:46,803 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 11:08:46,805 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 11:08:46,806 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 11:08:46,807 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 11:08:46,808 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 11:08:46,809 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 11:08:46,812 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 11:08:46,813 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 11:08:46,813 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 11:08:46,814 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 11:08:46,814 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 11:08:46,815 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 11:08:46,815 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 11:08:46,816 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 11:08:46,817 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 11:08:46,817 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 11:08:46,818 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 11:08:46,818 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 11:08:46,819 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 11:08:46,819 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 11:08:46,819 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 11:08:46,820 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 11:08:46,821 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 11:08:46,822 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 11:08:46,843 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 11:08:46,843 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 11:08:46,843 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 11:08:46,844 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 11:08:46,844 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 11:08:46,844 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 11:08:46,845 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 11:08:46,845 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 11:08:46,845 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 11:08:46,845 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 11:08:46,846 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 11:08:46,846 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 11:08:46,846 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 11:08:46,846 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 11:08:46,846 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 11:08:46,846 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 11:08:46,847 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 11:08:46,847 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 11:08:46,847 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 11:08:46,847 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 11:08:46,847 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 11:08:46,847 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 11:08:46,848 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 11:08:46,848 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 11:08:46,848 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 11:08:46,848 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 11:08:46,848 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 11:08:46,848 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 11:08:46,849 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 11:08:46,849 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 11:08:46,849 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 11:08:46,849 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 11:08:46,849 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 11:08:46,849 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 11:08:46,849 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_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d10bf8c0e842192a13f4b6638f03cf57668d5bee07d0b49c4b595de1c605066 [2022-12-13 11:08:47,011 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 11:08:47,027 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 11:08:47,028 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 11:08:47,029 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 11:08:47,030 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 11:08:47,030 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/mult-flipped-dist.wvr.c [2022-12-13 11:08:49,592 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 11:08:49,743 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 11:08:49,743 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/sv-benchmarks/c/weaver/mult-flipped-dist.wvr.c [2022-12-13 11:08:49,748 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/data/4e8d6f122/1e38433731fc4ad8aa430a0f8834de4c/FLAG4a3cff177 [2022-12-13 11:08:49,758 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/data/4e8d6f122/1e38433731fc4ad8aa430a0f8834de4c [2022-12-13 11:08:49,760 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 11:08:49,761 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 11:08:49,762 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 11:08:49,762 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 11:08:49,764 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 11:08:49,765 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:08:49" (1/1) ... [2022-12-13 11:08:49,766 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14227164 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:08:49, skipping insertion in model container [2022-12-13 11:08:49,766 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:08:49" (1/1) ... [2022-12-13 11:08:49,771 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 11:08:49,783 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 11:08:49,899 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_3913ac0f-150c-4eb1-bb91-acebb5216962/sv-benchmarks/c/weaver/mult-flipped-dist.wvr.c[2135,2148] [2022-12-13 11:08:49,902 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:08:49,910 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 11:08:49,925 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_3913ac0f-150c-4eb1-bb91-acebb5216962/sv-benchmarks/c/weaver/mult-flipped-dist.wvr.c[2135,2148] [2022-12-13 11:08:49,926 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:08:49,938 INFO L208 MainTranslator]: Completed translation [2022-12-13 11:08:49,939 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:08:49 WrapperNode [2022-12-13 11:08:49,939 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 11:08:49,939 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 11:08:49,940 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 11:08:49,940 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 11:08:49,945 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:08:49" (1/1) ... [2022-12-13 11:08:49,952 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:08:49" (1/1) ... [2022-12-13 11:08:49,965 INFO L138 Inliner]: procedures = 22, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 70 [2022-12-13 11:08:49,966 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 11:08:49,966 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 11:08:49,966 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 11:08:49,966 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 11:08:49,974 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:08:49" (1/1) ... [2022-12-13 11:08:49,975 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:08:49" (1/1) ... [2022-12-13 11:08:49,977 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:08:49" (1/1) ... [2022-12-13 11:08:49,977 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:08:49" (1/1) ... [2022-12-13 11:08:49,982 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:08:49" (1/1) ... [2022-12-13 11:08:49,985 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:08:49" (1/1) ... [2022-12-13 11:08:49,987 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:08:49" (1/1) ... [2022-12-13 11:08:49,988 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:08:49" (1/1) ... [2022-12-13 11:08:49,990 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 11:08:49,991 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 11:08:49,991 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 11:08:49,991 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 11:08:49,992 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:08:49" (1/1) ... [2022-12-13 11:08:49,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 11:08:50,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:08:50,019 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 11:08:50,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 11:08:50,054 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 11:08:50,054 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 11:08:50,054 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 11:08:50,054 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 11:08:50,055 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 11:08:50,055 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-13 11:08:50,055 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-13 11:08:50,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 11:08:50,055 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 11:08:50,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 11:08:50,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 11:08:50,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 11:08:50,055 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 11:08:50,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 11:08:50,057 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 11:08:50,135 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 11:08:50,137 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 11:08:50,348 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 11:08:50,354 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 11:08:50,354 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-13 11:08:50,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 11:08:50 BoogieIcfgContainer [2022-12-13 11:08:50,356 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 11:08:50,358 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 11:08:50,358 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 11:08:50,361 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 11:08:50,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 11:08:49" (1/3) ... [2022-12-13 11:08:50,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@310b50e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 11:08:50, skipping insertion in model container [2022-12-13 11:08:50,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:08:49" (2/3) ... [2022-12-13 11:08:50,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@310b50e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 11:08:50, skipping insertion in model container [2022-12-13 11:08:50,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 11:08:50" (3/3) ... [2022-12-13 11:08:50,363 INFO L112 eAbstractionObserver]: Analyzing ICFG mult-flipped-dist.wvr.c [2022-12-13 11:08:50,377 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 11:08:50,378 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2022-12-13 11:08:50,378 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 11:08:50,440 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 11:08:50,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 123 transitions, 270 flow [2022-12-13 11:08:50,533 INFO L130 PetriNetUnfolder]: 7/120 cut-off events. [2022-12-13 11:08:50,533 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 11:08:50,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 120 events. 7/120 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 114 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 73. Up to 2 conditions per place. [2022-12-13 11:08:50,540 INFO L82 GeneralOperation]: Start removeDead. Operand has 126 places, 123 transitions, 270 flow [2022-12-13 11:08:50,545 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 118 places, 115 transitions, 248 flow [2022-12-13 11:08:50,549 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 11:08:50,558 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 118 places, 115 transitions, 248 flow [2022-12-13 11:08:50,560 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 118 places, 115 transitions, 248 flow [2022-12-13 11:08:50,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 118 places, 115 transitions, 248 flow [2022-12-13 11:08:50,590 INFO L130 PetriNetUnfolder]: 7/115 cut-off events. [2022-12-13 11:08:50,590 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 11:08:50,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128 conditions, 115 events. 7/115 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 113 event pairs, 0 based on Foata normal form. 0/95 useless extension candidates. Maximal degree in co-relation 73. Up to 2 conditions per place. [2022-12-13 11:08:50,593 INFO L119 LiptonReduction]: Number of co-enabled transitions 1680 [2022-12-13 11:08:53,041 INFO L134 LiptonReduction]: Checked pairs total: 1732 [2022-12-13 11:08:53,042 INFO L136 LiptonReduction]: Total number of compositions: 111 [2022-12-13 11:08:53,057 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 11:08:53,063 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;@4d04bcbd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 11:08:53,063 INFO L358 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2022-12-13 11:08:53,065 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-12-13 11:08:53,065 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 11:08:53,066 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:08:53,066 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-12-13 11:08:53,067 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-13 11:08:53,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:08:53,071 INFO L85 PathProgramCache]: Analyzing trace with hash 453, now seen corresponding path program 1 times [2022-12-13 11:08:53,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:08:53,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096162642] [2022-12-13 11:08:53,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:08:53,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:08:53,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:08:53,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:08:53,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:08:53,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096162642] [2022-12-13 11:08:53,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096162642] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:08:53,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:08:53,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-12-13 11:08:53,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457155977] [2022-12-13 11:08:53,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:08:53,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 11:08:53,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:08:53,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 11:08:53,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 11:08:53,172 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 234 [2022-12-13 11:08:53,174 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 88 flow. Second operand has 2 states, 2 states have (on average 112.5) internal successors, (225), 2 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:53,174 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:08:53,174 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 234 [2022-12-13 11:08:53,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:08:53,284 INFO L130 PetriNetUnfolder]: 578/785 cut-off events. [2022-12-13 11:08:53,285 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2022-12-13 11:08:53,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1605 conditions, 785 events. 578/785 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 2804 event pairs, 263 based on Foata normal form. 0/363 useless extension candidates. Maximal degree in co-relation 1257. Up to 777 conditions per place. [2022-12-13 11:08:53,290 INFO L137 encePairwiseOnDemand]: 231/234 looper letters, 29 selfloop transitions, 0 changer transitions 0/32 dead transitions. [2022-12-13 11:08:53,291 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 32 transitions, 140 flow [2022-12-13 11:08:53,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 11:08:53,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-12-13 11:08:53,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 256 transitions. [2022-12-13 11:08:53,300 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5470085470085471 [2022-12-13 11:08:53,301 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 256 transitions. [2022-12-13 11:08:53,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 256 transitions. [2022-12-13 11:08:53,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:08:53,304 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 256 transitions. [2022-12-13 11:08:53,306 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 128.0) internal successors, (256), 2 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:53,310 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 234.0) internal successors, (702), 3 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:53,310 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 234.0) internal successors, (702), 3 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:53,311 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 88 flow. Second operand 2 states and 256 transitions. [2022-12-13 11:08:53,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 32 transitions, 140 flow [2022-12-13 11:08:53,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 32 transitions, 128 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-13 11:08:53,315 INFO L231 Difference]: Finished difference. Result has 34 places, 32 transitions, 70 flow [2022-12-13 11:08:53,317 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=70, PETRI_PLACES=34, PETRI_TRANSITIONS=32} [2022-12-13 11:08:53,320 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, -8 predicate places. [2022-12-13 11:08:53,320 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 32 transitions, 70 flow [2022-12-13 11:08:53,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 112.5) internal successors, (225), 2 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:53,320 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:08:53,320 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 11:08:53,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 11:08:53,321 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-13 11:08:53,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:08:53,321 INFO L85 PathProgramCache]: Analyzing trace with hash 444255, now seen corresponding path program 1 times [2022-12-13 11:08:53,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:08:53,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49972779] [2022-12-13 11:08:53,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:08:53,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:08:53,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:08:53,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:08:53,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:08:53,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49972779] [2022-12-13 11:08:53,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49972779] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:08:53,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:08:53,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:08:53,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274097374] [2022-12-13 11:08:53,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:08:53,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:08:53,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:08:53,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:08:53,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:08:53,477 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 234 [2022-12-13 11:08:53,478 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:53,478 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:08:53,479 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 234 [2022-12-13 11:08:53,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:08:53,554 INFO L130 PetriNetUnfolder]: 551/746 cut-off events. [2022-12-13 11:08:53,554 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 11:08:53,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1499 conditions, 746 events. 551/746 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 2604 event pairs, 250 based on Foata normal form. 0/350 useless extension candidates. Maximal degree in co-relation 1496. Up to 737 conditions per place. [2022-12-13 11:08:53,558 INFO L137 encePairwiseOnDemand]: 231/234 looper letters, 26 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2022-12-13 11:08:53,558 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 30 transitions, 120 flow [2022-12-13 11:08:53,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:08:53,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:08:53,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 335 transitions. [2022-12-13 11:08:53,562 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4772079772079772 [2022-12-13 11:08:53,562 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 335 transitions. [2022-12-13 11:08:53,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 335 transitions. [2022-12-13 11:08:53,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:08:53,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 335 transitions. [2022-12-13 11:08:53,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:53,565 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:53,566 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:53,566 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 70 flow. Second operand 3 states and 335 transitions. [2022-12-13 11:08:53,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 30 transitions, 120 flow [2022-12-13 11:08:53,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 30 transitions, 120 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 11:08:53,567 INFO L231 Difference]: Finished difference. Result has 34 places, 30 transitions, 68 flow [2022-12-13 11:08:53,567 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=34, PETRI_TRANSITIONS=30} [2022-12-13 11:08:53,567 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, -8 predicate places. [2022-12-13 11:08:53,567 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 68 flow [2022-12-13 11:08:53,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:53,568 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:08:53,568 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 11:08:53,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 11:08:53,568 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-13 11:08:53,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:08:53,569 INFO L85 PathProgramCache]: Analyzing trace with hash 444254, now seen corresponding path program 1 times [2022-12-13 11:08:53,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:08:53,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014828305] [2022-12-13 11:08:53,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:08:53,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:08:53,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:08:53,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:08:53,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:08:53,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014828305] [2022-12-13 11:08:53,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014828305] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:08:53,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:08:53,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:08:53,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889128879] [2022-12-13 11:08:53,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:08:53,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:08:53,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:08:53,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:08:53,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:08:53,688 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 234 [2022-12-13 11:08:53,689 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:53,689 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:08:53,689 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 234 [2022-12-13 11:08:53,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:08:53,760 INFO L130 PetriNetUnfolder]: 524/707 cut-off events. [2022-12-13 11:08:53,761 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 11:08:53,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1423 conditions, 707 events. 524/707 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 2422 event pairs, 237 based on Foata normal form. 0/337 useless extension candidates. Maximal degree in co-relation 1419. Up to 698 conditions per place. [2022-12-13 11:08:53,763 INFO L137 encePairwiseOnDemand]: 231/234 looper letters, 24 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2022-12-13 11:08:53,763 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 28 transitions, 114 flow [2022-12-13 11:08:53,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:08:53,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:08:53,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 348 transitions. [2022-12-13 11:08:53,765 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49572649572649574 [2022-12-13 11:08:53,765 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 348 transitions. [2022-12-13 11:08:53,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 348 transitions. [2022-12-13 11:08:53,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:08:53,765 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 348 transitions. [2022-12-13 11:08:53,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:53,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:53,768 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:53,768 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 68 flow. Second operand 3 states and 348 transitions. [2022-12-13 11:08:53,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 28 transitions, 114 flow [2022-12-13 11:08:53,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 28 transitions, 113 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:08:53,769 INFO L231 Difference]: Finished difference. Result has 33 places, 28 transitions, 65 flow [2022-12-13 11:08:53,769 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=63, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=33, PETRI_TRANSITIONS=28} [2022-12-13 11:08:53,769 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, -9 predicate places. [2022-12-13 11:08:53,769 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 28 transitions, 65 flow [2022-12-13 11:08:53,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:53,770 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:08:53,770 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 11:08:53,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 11:08:53,770 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-13 11:08:53,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:08:53,770 INFO L85 PathProgramCache]: Analyzing trace with hash 426936961, now seen corresponding path program 1 times [2022-12-13 11:08:53,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:08:53,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815480129] [2022-12-13 11:08:53,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:08:53,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:08:53,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:08:53,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:08:53,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:08:53,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815480129] [2022-12-13 11:08:53,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815480129] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:08:53,824 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:08:53,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:08:53,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746017375] [2022-12-13 11:08:53,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:08:53,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:08:53,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:08:53,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:08:53,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:08:53,857 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 234 [2022-12-13 11:08:53,858 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 28 transitions, 65 flow. Second operand has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:53,858 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:08:53,858 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 234 [2022-12-13 11:08:53,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:08:53,920 INFO L130 PetriNetUnfolder]: 498/669 cut-off events. [2022-12-13 11:08:53,920 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 11:08:53,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1348 conditions, 669 events. 498/669 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 2267 event pairs, 225 based on Foata normal form. 0/325 useless extension candidates. Maximal degree in co-relation 1344. Up to 660 conditions per place. [2022-12-13 11:08:53,924 INFO L137 encePairwiseOnDemand]: 231/234 looper letters, 22 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2022-12-13 11:08:53,925 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 26 transitions, 107 flow [2022-12-13 11:08:53,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:08:53,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:08:53,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 346 transitions. [2022-12-13 11:08:53,927 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4928774928774929 [2022-12-13 11:08:53,927 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 346 transitions. [2022-12-13 11:08:53,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 346 transitions. [2022-12-13 11:08:53,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:08:53,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 346 transitions. [2022-12-13 11:08:53,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:53,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:53,931 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:53,931 INFO L175 Difference]: Start difference. First operand has 33 places, 28 transitions, 65 flow. Second operand 3 states and 346 transitions. [2022-12-13 11:08:53,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 26 transitions, 107 flow [2022-12-13 11:08:53,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 26 transitions, 106 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:08:53,932 INFO L231 Difference]: Finished difference. Result has 32 places, 26 transitions, 62 flow [2022-12-13 11:08:53,932 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=62, PETRI_PLACES=32, PETRI_TRANSITIONS=26} [2022-12-13 11:08:53,932 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, -10 predicate places. [2022-12-13 11:08:53,932 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 26 transitions, 62 flow [2022-12-13 11:08:53,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:53,933 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:08:53,933 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 11:08:53,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 11:08:53,933 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-13 11:08:53,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:08:53,933 INFO L85 PathProgramCache]: Analyzing trace with hash 426936960, now seen corresponding path program 1 times [2022-12-13 11:08:53,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:08:53,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227684229] [2022-12-13 11:08:53,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:08:53,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:08:53,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:08:53,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:08:53,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:08:53,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227684229] [2022-12-13 11:08:53,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227684229] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:08:53,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:08:53,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:08:53,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682186658] [2022-12-13 11:08:53,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:08:53,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:08:53,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:08:53,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:08:53,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:08:53,998 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 234 [2022-12-13 11:08:53,999 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:53,999 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:08:53,999 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 234 [2022-12-13 11:08:53,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:08:54,060 INFO L130 PetriNetUnfolder]: 472/631 cut-off events. [2022-12-13 11:08:54,061 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 11:08:54,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1273 conditions, 631 events. 472/631 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 2098 event pairs, 213 based on Foata normal form. 0/313 useless extension candidates. Maximal degree in co-relation 1269. Up to 622 conditions per place. [2022-12-13 11:08:54,063 INFO L137 encePairwiseOnDemand]: 231/234 looper letters, 20 selfloop transitions, 1 changer transitions 0/24 dead transitions. [2022-12-13 11:08:54,063 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 24 transitions, 100 flow [2022-12-13 11:08:54,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:08:54,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:08:54,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 329 transitions. [2022-12-13 11:08:54,066 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4686609686609687 [2022-12-13 11:08:54,066 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 329 transitions. [2022-12-13 11:08:54,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 329 transitions. [2022-12-13 11:08:54,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:08:54,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 329 transitions. [2022-12-13 11:08:54,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:54,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:54,071 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:54,071 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 62 flow. Second operand 3 states and 329 transitions. [2022-12-13 11:08:54,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 24 transitions, 100 flow [2022-12-13 11:08:54,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 24 transitions, 99 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:08:54,072 INFO L231 Difference]: Finished difference. Result has 31 places, 24 transitions, 59 flow [2022-12-13 11:08:54,072 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=59, PETRI_PLACES=31, PETRI_TRANSITIONS=24} [2022-12-13 11:08:54,073 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, -11 predicate places. [2022-12-13 11:08:54,073 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 24 transitions, 59 flow [2022-12-13 11:08:54,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:54,073 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:08:54,073 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:08:54,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 11:08:54,073 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-13 11:08:54,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:08:54,074 INFO L85 PathProgramCache]: Analyzing trace with hash -2030430003, now seen corresponding path program 1 times [2022-12-13 11:08:54,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:08:54,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973402582] [2022-12-13 11:08:54,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:08:54,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:08:54,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:08:54,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:08:54,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:08:54,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973402582] [2022-12-13 11:08:54,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973402582] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:08:54,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:08:54,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 11:08:54,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277805787] [2022-12-13 11:08:54,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:08:54,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 11:08:54,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:08:54,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 11:08:54,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-13 11:08:54,217 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 234 [2022-12-13 11:08:54,218 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 24 transitions, 59 flow. Second operand has 5 states, 5 states have (on average 95.4) internal successors, (477), 5 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:54,218 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:08:54,218 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 234 [2022-12-13 11:08:54,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:08:54,283 INFO L130 PetriNetUnfolder]: 370/502 cut-off events. [2022-12-13 11:08:54,283 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 11:08:54,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1016 conditions, 502 events. 370/502 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1607 event pairs, 165 based on Foata normal form. 0/265 useless extension candidates. Maximal degree in co-relation 1012. Up to 493 conditions per place. [2022-12-13 11:08:54,286 INFO L137 encePairwiseOnDemand]: 232/234 looper letters, 19 selfloop transitions, 1 changer transitions 0/23 dead transitions. [2022-12-13 11:08:54,286 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 23 transitions, 97 flow [2022-12-13 11:08:54,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:08:54,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:08:54,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 303 transitions. [2022-12-13 11:08:54,288 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43162393162393164 [2022-12-13 11:08:54,288 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 303 transitions. [2022-12-13 11:08:54,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 303 transitions. [2022-12-13 11:08:54,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:08:54,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 303 transitions. [2022-12-13 11:08:54,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:54,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:54,291 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:54,291 INFO L175 Difference]: Start difference. First operand has 31 places, 24 transitions, 59 flow. Second operand 3 states and 303 transitions. [2022-12-13 11:08:54,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 23 transitions, 97 flow [2022-12-13 11:08:54,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 23 transitions, 96 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:08:54,292 INFO L231 Difference]: Finished difference. Result has 31 places, 23 transitions, 58 flow [2022-12-13 11:08:54,292 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=31, PETRI_TRANSITIONS=23} [2022-12-13 11:08:54,293 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, -11 predicate places. [2022-12-13 11:08:54,293 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 23 transitions, 58 flow [2022-12-13 11:08:54,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 95.4) internal successors, (477), 5 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:54,294 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:08:54,294 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:08:54,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 11:08:54,294 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-13 11:08:54,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:08:54,294 INFO L85 PathProgramCache]: Analyzing trace with hash -2030430002, now seen corresponding path program 1 times [2022-12-13 11:08:54,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:08:54,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636264212] [2022-12-13 11:08:54,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:08:54,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:08:54,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:08:54,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:08:54,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:08:54,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636264212] [2022-12-13 11:08:54,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636264212] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:08:54,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:08:54,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:08:54,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540261226] [2022-12-13 11:08:54,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:08:54,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:08:54,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:08:54,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:08:54,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:08:54,422 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 234 [2022-12-13 11:08:54,423 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 23 transitions, 58 flow. Second operand has 4 states, 4 states have (on average 106.75) internal successors, (427), 4 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:54,423 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:08:54,423 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 234 [2022-12-13 11:08:54,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:08:54,470 INFO L130 PetriNetUnfolder]: 268/373 cut-off events. [2022-12-13 11:08:54,470 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 11:08:54,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 759 conditions, 373 events. 268/373 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1121 event pairs, 117 based on Foata normal form. 0/217 useless extension candidates. Maximal degree in co-relation 755. Up to 364 conditions per place. [2022-12-13 11:08:54,472 INFO L137 encePairwiseOnDemand]: 232/234 looper letters, 18 selfloop transitions, 1 changer transitions 0/22 dead transitions. [2022-12-13 11:08:54,472 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 22 transitions, 94 flow [2022-12-13 11:08:54,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:08:54,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:08:54,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 335 transitions. [2022-12-13 11:08:54,474 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4772079772079772 [2022-12-13 11:08:54,474 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 335 transitions. [2022-12-13 11:08:54,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 335 transitions. [2022-12-13 11:08:54,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:08:54,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 335 transitions. [2022-12-13 11:08:54,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:54,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:54,477 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:54,477 INFO L175 Difference]: Start difference. First operand has 31 places, 23 transitions, 58 flow. Second operand 3 states and 335 transitions. [2022-12-13 11:08:54,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 22 transitions, 94 flow [2022-12-13 11:08:54,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 22 transitions, 93 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:08:54,478 INFO L231 Difference]: Finished difference. Result has 31 places, 22 transitions, 57 flow [2022-12-13 11:08:54,478 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=55, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=31, PETRI_TRANSITIONS=22} [2022-12-13 11:08:54,479 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, -11 predicate places. [2022-12-13 11:08:54,479 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 22 transitions, 57 flow [2022-12-13 11:08:54,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 106.75) internal successors, (427), 4 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:54,479 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:08:54,479 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:08:54,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 11:08:54,480 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-13 11:08:54,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:08:54,480 INFO L85 PathProgramCache]: Analyzing trace with hash 65894849, now seen corresponding path program 1 times [2022-12-13 11:08:54,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:08:54,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160202804] [2022-12-13 11:08:54,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:08:54,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:08:54,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:08:54,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:08:54,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:08:54,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160202804] [2022-12-13 11:08:54,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160202804] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:08:54,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:08:54,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:08:54,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188983686] [2022-12-13 11:08:54,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:08:54,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:08:54,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:08:54,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:08:54,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:08:54,737 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 234 [2022-12-13 11:08:54,738 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 22 transitions, 57 flow. Second operand has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:54,738 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:08:54,738 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 234 [2022-12-13 11:08:54,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:08:54,817 INFO L130 PetriNetUnfolder]: 359/506 cut-off events. [2022-12-13 11:08:54,817 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-12-13 11:08:54,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1032 conditions, 506 events. 359/506 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1623 event pairs, 39 based on Foata normal form. 1/304 useless extension candidates. Maximal degree in co-relation 1028. Up to 421 conditions per place. [2022-12-13 11:08:54,820 INFO L137 encePairwiseOnDemand]: 229/234 looper letters, 30 selfloop transitions, 4 changer transitions 1/38 dead transitions. [2022-12-13 11:08:54,820 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 38 transitions, 164 flow [2022-12-13 11:08:54,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:08:54,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:08:54,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 363 transitions. [2022-12-13 11:08:54,821 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5170940170940171 [2022-12-13 11:08:54,821 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 363 transitions. [2022-12-13 11:08:54,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 363 transitions. [2022-12-13 11:08:54,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:08:54,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 363 transitions. [2022-12-13 11:08:54,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:54,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:54,823 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:54,823 INFO L175 Difference]: Start difference. First operand has 31 places, 22 transitions, 57 flow. Second operand 3 states and 363 transitions. [2022-12-13 11:08:54,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 38 transitions, 164 flow [2022-12-13 11:08:54,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 38 transitions, 163 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:08:54,824 INFO L231 Difference]: Finished difference. Result has 33 places, 25 transitions, 82 flow [2022-12-13 11:08:54,824 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=33, PETRI_TRANSITIONS=25} [2022-12-13 11:08:54,824 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, -9 predicate places. [2022-12-13 11:08:54,824 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 25 transitions, 82 flow [2022-12-13 11:08:54,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:54,825 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:08:54,825 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:08:54,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 11:08:54,825 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-13 11:08:54,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:08:54,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1942672697, now seen corresponding path program 1 times [2022-12-13 11:08:54,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:08:54,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689403006] [2022-12-13 11:08:54,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:08:54,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:08:54,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:08:54,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:08:54,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:08:54,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689403006] [2022-12-13 11:08:54,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689403006] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:08:54,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:08:54,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 11:08:54,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001272887] [2022-12-13 11:08:54,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:08:54,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 11:08:54,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:08:54,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 11:08:54,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 11:08:54,973 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 234 [2022-12-13 11:08:54,974 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 25 transitions, 82 flow. Second operand has 5 states, 5 states have (on average 105.8) internal successors, (529), 5 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:54,974 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:08:54,974 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 234 [2022-12-13 11:08:54,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:08:55,139 INFO L130 PetriNetUnfolder]: 495/775 cut-off events. [2022-12-13 11:08:55,139 INFO L131 PetriNetUnfolder]: For 200/200 co-relation queries the response was YES. [2022-12-13 11:08:55,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1815 conditions, 775 events. 495/775 cut-off events. For 200/200 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3437 event pairs, 139 based on Foata normal form. 96/867 useless extension candidates. Maximal degree in co-relation 1810. Up to 388 conditions per place. [2022-12-13 11:08:55,142 INFO L137 encePairwiseOnDemand]: 228/234 looper letters, 54 selfloop transitions, 5 changer transitions 2/62 dead transitions. [2022-12-13 11:08:55,142 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 62 transitions, 304 flow [2022-12-13 11:08:55,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 11:08:55,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 11:08:55,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 570 transitions. [2022-12-13 11:08:55,143 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48717948717948717 [2022-12-13 11:08:55,143 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 570 transitions. [2022-12-13 11:08:55,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 570 transitions. [2022-12-13 11:08:55,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:08:55,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 570 transitions. [2022-12-13 11:08:55,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 114.0) internal successors, (570), 5 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:55,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:55,146 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:55,146 INFO L175 Difference]: Start difference. First operand has 33 places, 25 transitions, 82 flow. Second operand 5 states and 570 transitions. [2022-12-13 11:08:55,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 62 transitions, 304 flow [2022-12-13 11:08:55,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 62 transitions, 298 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:08:55,148 INFO L231 Difference]: Finished difference. Result has 39 places, 28 transitions, 125 flow [2022-12-13 11:08:55,148 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=125, PETRI_PLACES=39, PETRI_TRANSITIONS=28} [2022-12-13 11:08:55,148 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, -3 predicate places. [2022-12-13 11:08:55,148 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 28 transitions, 125 flow [2022-12-13 11:08:55,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 105.8) internal successors, (529), 5 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:55,149 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:08:55,149 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:08:55,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 11:08:55,149 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-13 11:08:55,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:08:55,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1660389315, now seen corresponding path program 1 times [2022-12-13 11:08:55,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:08:55,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552951057] [2022-12-13 11:08:55,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:08:55,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:08:55,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:08:55,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:08:55,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:08:55,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552951057] [2022-12-13 11:08:55,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552951057] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:08:55,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:08:55,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 11:08:55,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719110968] [2022-12-13 11:08:55,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:08:55,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:08:55,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:08:55,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:08:55,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:08:55,250 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 234 [2022-12-13 11:08:55,250 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 28 transitions, 125 flow. Second operand has 4 states, 4 states have (on average 108.5) internal successors, (434), 4 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:55,250 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:08:55,251 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 234 [2022-12-13 11:08:55,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:08:55,370 INFO L130 PetriNetUnfolder]: 461/727 cut-off events. [2022-12-13 11:08:55,370 INFO L131 PetriNetUnfolder]: For 671/735 co-relation queries the response was YES. [2022-12-13 11:08:55,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2258 conditions, 727 events. 461/727 cut-off events. For 671/735 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3065 event pairs, 101 based on Foata normal form. 108/830 useless extension candidates. Maximal degree in co-relation 2250. Up to 454 conditions per place. [2022-12-13 11:08:55,373 INFO L137 encePairwiseOnDemand]: 229/234 looper letters, 39 selfloop transitions, 5 changer transitions 9/55 dead transitions. [2022-12-13 11:08:55,373 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 55 transitions, 329 flow [2022-12-13 11:08:55,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 11:08:55,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 11:08:55,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 464 transitions. [2022-12-13 11:08:55,374 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49572649572649574 [2022-12-13 11:08:55,374 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 464 transitions. [2022-12-13 11:08:55,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 464 transitions. [2022-12-13 11:08:55,375 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:08:55,375 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 464 transitions. [2022-12-13 11:08:55,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:55,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:55,377 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:55,377 INFO L175 Difference]: Start difference. First operand has 39 places, 28 transitions, 125 flow. Second operand 4 states and 464 transitions. [2022-12-13 11:08:55,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 55 transitions, 329 flow [2022-12-13 11:08:55,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 55 transitions, 319 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-12-13 11:08:55,379 INFO L231 Difference]: Finished difference. Result has 43 places, 29 transitions, 147 flow [2022-12-13 11:08:55,379 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=147, PETRI_PLACES=43, PETRI_TRANSITIONS=29} [2022-12-13 11:08:55,379 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 1 predicate places. [2022-12-13 11:08:55,380 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 29 transitions, 147 flow [2022-12-13 11:08:55,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 108.5) internal successors, (434), 4 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:55,380 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:08:55,380 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:08:55,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 11:08:55,380 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-13 11:08:55,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:08:55,380 INFO L85 PathProgramCache]: Analyzing trace with hash 633446787, now seen corresponding path program 1 times [2022-12-13 11:08:55,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:08:55,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231856674] [2022-12-13 11:08:55,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:08:55,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:08:55,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:08:55,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:08:55,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:08:55,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231856674] [2022-12-13 11:08:55,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231856674] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:08:55,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:08:55,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 11:08:55,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360023606] [2022-12-13 11:08:55,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:08:55,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 11:08:55,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:08:55,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 11:08:55,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 11:08:55,491 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 234 [2022-12-13 11:08:55,492 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 29 transitions, 147 flow. Second operand has 5 states, 5 states have (on average 105.8) internal successors, (529), 5 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:55,492 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:08:55,493 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 234 [2022-12-13 11:08:55,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:08:55,681 INFO L130 PetriNetUnfolder]: 655/1076 cut-off events. [2022-12-13 11:08:55,681 INFO L131 PetriNetUnfolder]: For 2862/3002 co-relation queries the response was YES. [2022-12-13 11:08:55,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3487 conditions, 1076 events. 655/1076 cut-off events. For 2862/3002 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4865 event pairs, 178 based on Foata normal form. 108/1151 useless extension candidates. Maximal degree in co-relation 3477. Up to 616 conditions per place. [2022-12-13 11:08:55,685 INFO L137 encePairwiseOnDemand]: 228/234 looper letters, 59 selfloop transitions, 5 changer transitions 4/70 dead transitions. [2022-12-13 11:08:55,685 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 70 transitions, 449 flow [2022-12-13 11:08:55,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 11:08:55,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 11:08:55,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 570 transitions. [2022-12-13 11:08:55,687 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48717948717948717 [2022-12-13 11:08:55,687 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 570 transitions. [2022-12-13 11:08:55,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 570 transitions. [2022-12-13 11:08:55,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:08:55,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 570 transitions. [2022-12-13 11:08:55,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 114.0) internal successors, (570), 5 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:55,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:55,689 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:55,689 INFO L175 Difference]: Start difference. First operand has 43 places, 29 transitions, 147 flow. Second operand 5 states and 570 transitions. [2022-12-13 11:08:55,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 70 transitions, 449 flow [2022-12-13 11:08:55,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 70 transitions, 422 flow, removed 11 selfloop flow, removed 2 redundant places. [2022-12-13 11:08:55,692 INFO L231 Difference]: Finished difference. Result has 47 places, 32 transitions, 187 flow [2022-12-13 11:08:55,692 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=187, PETRI_PLACES=47, PETRI_TRANSITIONS=32} [2022-12-13 11:08:55,693 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 5 predicate places. [2022-12-13 11:08:55,693 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 32 transitions, 187 flow [2022-12-13 11:08:55,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 105.8) internal successors, (529), 5 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:55,693 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:08:55,693 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:08:55,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 11:08:55,693 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-13 11:08:55,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:08:55,693 INFO L85 PathProgramCache]: Analyzing trace with hash -449259343, now seen corresponding path program 2 times [2022-12-13 11:08:55,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:08:55,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162189215] [2022-12-13 11:08:55,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:08:55,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:08:55,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:08:55,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:08:55,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:08:55,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162189215] [2022-12-13 11:08:55,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162189215] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:08:55,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:08:55,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 11:08:55,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344598753] [2022-12-13 11:08:55,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:08:55,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 11:08:55,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:08:55,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 11:08:55,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 11:08:55,797 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 234 [2022-12-13 11:08:55,798 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 32 transitions, 187 flow. Second operand has 5 states, 5 states have (on average 104.8) internal successors, (524), 5 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:55,798 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:08:55,798 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 234 [2022-12-13 11:08:55,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:08:56,009 INFO L130 PetriNetUnfolder]: 951/1573 cut-off events. [2022-12-13 11:08:56,010 INFO L131 PetriNetUnfolder]: For 3482/3662 co-relation queries the response was YES. [2022-12-13 11:08:56,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5782 conditions, 1573 events. 951/1573 cut-off events. For 3482/3662 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 7883 event pairs, 427 based on Foata normal form. 107/1643 useless extension candidates. Maximal degree in co-relation 5770. Up to 821 conditions per place. [2022-12-13 11:08:56,016 INFO L137 encePairwiseOnDemand]: 227/234 looper letters, 60 selfloop transitions, 13 changer transitions 2/77 dead transitions. [2022-12-13 11:08:56,016 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 77 transitions, 589 flow [2022-12-13 11:08:56,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 11:08:56,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 11:08:56,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 561 transitions. [2022-12-13 11:08:56,017 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4794871794871795 [2022-12-13 11:08:56,017 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 561 transitions. [2022-12-13 11:08:56,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 561 transitions. [2022-12-13 11:08:56,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:08:56,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 561 transitions. [2022-12-13 11:08:56,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 112.2) internal successors, (561), 5 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:56,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:56,020 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:56,020 INFO L175 Difference]: Start difference. First operand has 47 places, 32 transitions, 187 flow. Second operand 5 states and 561 transitions. [2022-12-13 11:08:56,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 77 transitions, 589 flow [2022-12-13 11:08:56,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 77 transitions, 569 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 11:08:56,025 INFO L231 Difference]: Finished difference. Result has 53 places, 41 transitions, 318 flow [2022-12-13 11:08:56,025 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=318, PETRI_PLACES=53, PETRI_TRANSITIONS=41} [2022-12-13 11:08:56,025 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 11 predicate places. [2022-12-13 11:08:56,025 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 41 transitions, 318 flow [2022-12-13 11:08:56,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 104.8) internal successors, (524), 5 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:56,026 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:08:56,026 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:08:56,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 11:08:56,026 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-13 11:08:56,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:08:56,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1787306899, now seen corresponding path program 2 times [2022-12-13 11:08:56,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:08:56,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086230014] [2022-12-13 11:08:56,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:08:56,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:08:56,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:08:56,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:08:56,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:08:56,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086230014] [2022-12-13 11:08:56,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086230014] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:08:56,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:08:56,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 11:08:56,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325109603] [2022-12-13 11:08:56,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:08:56,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:08:56,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:08:56,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:08:56,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:08:56,107 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 234 [2022-12-13 11:08:56,108 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 41 transitions, 318 flow. Second operand has 4 states, 4 states have (on average 108.5) internal successors, (434), 4 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:56,108 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:08:56,108 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 234 [2022-12-13 11:08:56,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:08:56,316 INFO L130 PetriNetUnfolder]: 934/1541 cut-off events. [2022-12-13 11:08:56,316 INFO L131 PetriNetUnfolder]: For 5717/6070 co-relation queries the response was YES. [2022-12-13 11:08:56,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6590 conditions, 1541 events. 934/1541 cut-off events. For 5717/6070 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 8129 event pairs, 330 based on Foata normal form. 209/1677 useless extension candidates. Maximal degree in co-relation 6575. Up to 1093 conditions per place. [2022-12-13 11:08:56,323 INFO L137 encePairwiseOnDemand]: 229/234 looper letters, 47 selfloop transitions, 7 changer transitions 12/70 dead transitions. [2022-12-13 11:08:56,323 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 70 transitions, 620 flow [2022-12-13 11:08:56,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 11:08:56,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 11:08:56,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 462 transitions. [2022-12-13 11:08:56,324 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4935897435897436 [2022-12-13 11:08:56,324 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 462 transitions. [2022-12-13 11:08:56,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 462 transitions. [2022-12-13 11:08:56,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:08:56,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 462 transitions. [2022-12-13 11:08:56,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 115.5) internal successors, (462), 4 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:56,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:56,327 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:56,327 INFO L175 Difference]: Start difference. First operand has 53 places, 41 transitions, 318 flow. Second operand 4 states and 462 transitions. [2022-12-13 11:08:56,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 70 transitions, 620 flow [2022-12-13 11:08:56,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 70 transitions, 620 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 11:08:56,330 INFO L231 Difference]: Finished difference. Result has 58 places, 42 transitions, 353 flow [2022-12-13 11:08:56,331 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=353, PETRI_PLACES=58, PETRI_TRANSITIONS=42} [2022-12-13 11:08:56,331 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2022-12-13 11:08:56,331 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 42 transitions, 353 flow [2022-12-13 11:08:56,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 108.5) internal successors, (434), 4 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:56,331 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:08:56,331 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:08:56,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-13 11:08:56,332 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-13 11:08:56,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:08:56,332 INFO L85 PathProgramCache]: Analyzing trace with hash 313198405, now seen corresponding path program 2 times [2022-12-13 11:08:56,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:08:56,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221423916] [2022-12-13 11:08:56,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:08:56,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:08:56,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:08:56,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:08:56,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:08:56,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221423916] [2022-12-13 11:08:56,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221423916] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:08:56,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:08:56,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 11:08:56,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148421432] [2022-12-13 11:08:56,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:08:56,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 11:08:56,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:08:56,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 11:08:56,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 11:08:56,443 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 234 [2022-12-13 11:08:56,444 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 42 transitions, 353 flow. Second operand has 5 states, 5 states have (on average 104.8) internal successors, (524), 5 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:56,444 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:08:56,444 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 234 [2022-12-13 11:08:56,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:08:56,691 INFO L130 PetriNetUnfolder]: 1092/1785 cut-off events. [2022-12-13 11:08:56,691 INFO L131 PetriNetUnfolder]: For 7952/8117 co-relation queries the response was YES. [2022-12-13 11:08:56,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7954 conditions, 1785 events. 1092/1785 cut-off events. For 7952/8117 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 9413 event pairs, 379 based on Foata normal form. 149/1920 useless extension candidates. Maximal degree in co-relation 7936. Up to 960 conditions per place. [2022-12-13 11:08:56,699 INFO L137 encePairwiseOnDemand]: 227/234 looper letters, 76 selfloop transitions, 17 changer transitions 14/109 dead transitions. [2022-12-13 11:08:56,699 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 109 transitions, 1074 flow [2022-12-13 11:08:56,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 11:08:56,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 11:08:56,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 671 transitions. [2022-12-13 11:08:56,701 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4779202279202279 [2022-12-13 11:08:56,701 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 671 transitions. [2022-12-13 11:08:56,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 671 transitions. [2022-12-13 11:08:56,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:08:56,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 671 transitions. [2022-12-13 11:08:56,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 111.83333333333333) internal successors, (671), 6 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:56,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 234.0) internal successors, (1638), 7 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:56,704 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 234.0) internal successors, (1638), 7 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:56,704 INFO L175 Difference]: Start difference. First operand has 58 places, 42 transitions, 353 flow. Second operand 6 states and 671 transitions. [2022-12-13 11:08:56,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 109 transitions, 1074 flow [2022-12-13 11:08:56,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 109 transitions, 1024 flow, removed 18 selfloop flow, removed 2 redundant places. [2022-12-13 11:08:56,710 INFO L231 Difference]: Finished difference. Result has 63 places, 54 transitions, 543 flow [2022-12-13 11:08:56,710 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=543, PETRI_PLACES=63, PETRI_TRANSITIONS=54} [2022-12-13 11:08:56,711 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 21 predicate places. [2022-12-13 11:08:56,711 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 54 transitions, 543 flow [2022-12-13 11:08:56,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 104.8) internal successors, (524), 5 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:56,711 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:08:56,712 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:08:56,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-13 11:08:56,712 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-13 11:08:56,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:08:56,712 INFO L85 PathProgramCache]: Analyzing trace with hash 476667797, now seen corresponding path program 3 times [2022-12-13 11:08:56,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:08:56,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27860818] [2022-12-13 11:08:56,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:08:56,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:08:56,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:08:56,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:08:56,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:08:56,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27860818] [2022-12-13 11:08:56,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27860818] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:08:56,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:08:56,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 11:08:56,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300655865] [2022-12-13 11:08:56,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:08:56,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:08:56,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:08:56,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:08:56,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:08:56,797 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 234 [2022-12-13 11:08:56,798 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 54 transitions, 543 flow. Second operand has 4 states, 4 states have (on average 108.5) internal successors, (434), 4 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:56,798 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:08:56,798 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 234 [2022-12-13 11:08:56,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:08:57,026 INFO L130 PetriNetUnfolder]: 1238/1987 cut-off events. [2022-12-13 11:08:57,026 INFO L131 PetriNetUnfolder]: For 10918/11277 co-relation queries the response was YES. [2022-12-13 11:08:57,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9850 conditions, 1987 events. 1238/1987 cut-off events. For 10918/11277 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 10339 event pairs, 346 based on Foata normal form. 228/2115 useless extension candidates. Maximal degree in co-relation 9830. Up to 1066 conditions per place. [2022-12-13 11:08:57,037 INFO L137 encePairwiseOnDemand]: 229/234 looper letters, 65 selfloop transitions, 21 changer transitions 5/97 dead transitions. [2022-12-13 11:08:57,037 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 97 transitions, 1098 flow [2022-12-13 11:08:57,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 11:08:57,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 11:08:57,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 462 transitions. [2022-12-13 11:08:57,039 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4935897435897436 [2022-12-13 11:08:57,039 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 462 transitions. [2022-12-13 11:08:57,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 462 transitions. [2022-12-13 11:08:57,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:08:57,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 462 transitions. [2022-12-13 11:08:57,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 115.5) internal successors, (462), 4 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:57,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:57,042 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:57,042 INFO L175 Difference]: Start difference. First operand has 63 places, 54 transitions, 543 flow. Second operand 4 states and 462 transitions. [2022-12-13 11:08:57,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 97 transitions, 1098 flow [2022-12-13 11:08:57,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 97 transitions, 1072 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 11:08:57,051 INFO L231 Difference]: Finished difference. Result has 67 places, 67 transitions, 796 flow [2022-12-13 11:08:57,051 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=527, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=796, PETRI_PLACES=67, PETRI_TRANSITIONS=67} [2022-12-13 11:08:57,051 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 25 predicate places. [2022-12-13 11:08:57,052 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 67 transitions, 796 flow [2022-12-13 11:08:57,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 108.5) internal successors, (434), 4 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:57,052 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:08:57,052 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:08:57,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-13 11:08:57,052 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-13 11:08:57,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:08:57,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1074708991, now seen corresponding path program 3 times [2022-12-13 11:08:57,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:08:57,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533261907] [2022-12-13 11:08:57,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:08:57,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:08:57,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:08:57,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:08:57,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:08:57,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533261907] [2022-12-13 11:08:57,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533261907] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:08:57,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:08:57,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 11:08:57,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654136826] [2022-12-13 11:08:57,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:08:57,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:08:57,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:08:57,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:08:57,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:08:57,125 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 234 [2022-12-13 11:08:57,125 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 67 transitions, 796 flow. Second operand has 4 states, 4 states have (on average 108.5) internal successors, (434), 4 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:57,126 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:08:57,126 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 234 [2022-12-13 11:08:57,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:08:57,378 INFO L130 PetriNetUnfolder]: 1177/1812 cut-off events. [2022-12-13 11:08:57,378 INFO L131 PetriNetUnfolder]: For 14768/15161 co-relation queries the response was YES. [2022-12-13 11:08:57,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10302 conditions, 1812 events. 1177/1812 cut-off events. For 14768/15161 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 8984 event pairs, 347 based on Foata normal form. 221/1950 useless extension candidates. Maximal degree in co-relation 10280. Up to 1085 conditions per place. [2022-12-13 11:08:57,392 INFO L137 encePairwiseOnDemand]: 229/234 looper letters, 61 selfloop transitions, 31 changer transitions 14/112 dead transitions. [2022-12-13 11:08:57,392 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 112 transitions, 1470 flow [2022-12-13 11:08:57,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 11:08:57,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 11:08:57,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 461 transitions. [2022-12-13 11:08:57,394 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49252136752136755 [2022-12-13 11:08:57,394 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 461 transitions. [2022-12-13 11:08:57,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 461 transitions. [2022-12-13 11:08:57,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:08:57,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 461 transitions. [2022-12-13 11:08:57,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 115.25) internal successors, (461), 4 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:57,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:57,398 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:57,398 INFO L175 Difference]: Start difference. First operand has 67 places, 67 transitions, 796 flow. Second operand 4 states and 461 transitions. [2022-12-13 11:08:57,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 112 transitions, 1470 flow [2022-12-13 11:08:57,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 112 transitions, 1456 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:08:57,415 INFO L231 Difference]: Finished difference. Result has 70 places, 79 transitions, 1112 flow [2022-12-13 11:08:57,415 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=788, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1112, PETRI_PLACES=70, PETRI_TRANSITIONS=79} [2022-12-13 11:08:57,415 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 28 predicate places. [2022-12-13 11:08:57,416 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 79 transitions, 1112 flow [2022-12-13 11:08:57,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 108.5) internal successors, (434), 4 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:57,416 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:08:57,416 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:08:57,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-13 11:08:57,416 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-13 11:08:57,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:08:57,417 INFO L85 PathProgramCache]: Analyzing trace with hash -418245285, now seen corresponding path program 4 times [2022-12-13 11:08:57,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:08:57,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553599871] [2022-12-13 11:08:57,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:08:57,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:08:57,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:08:57,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:08:57,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:08:57,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553599871] [2022-12-13 11:08:57,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553599871] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:08:57,493 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:08:57,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 11:08:57,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396703932] [2022-12-13 11:08:57,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:08:57,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:08:57,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:08:57,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:08:57,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:08:57,511 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 234 [2022-12-13 11:08:57,511 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 79 transitions, 1112 flow. Second operand has 4 states, 4 states have (on average 108.5) internal successors, (434), 4 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:57,511 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:08:57,511 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 234 [2022-12-13 11:08:57,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:08:57,712 INFO L130 PetriNetUnfolder]: 1091/1644 cut-off events. [2022-12-13 11:08:57,712 INFO L131 PetriNetUnfolder]: For 17941/18215 co-relation queries the response was YES. [2022-12-13 11:08:57,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10426 conditions, 1644 events. 1091/1644 cut-off events. For 17941/18215 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 7496 event pairs, 258 based on Foata normal form. 220/1830 useless extension candidates. Maximal degree in co-relation 10403. Up to 902 conditions per place. [2022-12-13 11:08:57,720 INFO L137 encePairwiseOnDemand]: 229/234 looper letters, 69 selfloop transitions, 48 changer transitions 3/124 dead transitions. [2022-12-13 11:08:57,720 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 124 transitions, 1831 flow [2022-12-13 11:08:57,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 11:08:57,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 11:08:57,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 460 transitions. [2022-12-13 11:08:57,722 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49145299145299143 [2022-12-13 11:08:57,722 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 460 transitions. [2022-12-13 11:08:57,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 460 transitions. [2022-12-13 11:08:57,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:08:57,722 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 460 transitions. [2022-12-13 11:08:57,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 115.0) internal successors, (460), 4 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:57,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:57,725 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:57,725 INFO L175 Difference]: Start difference. First operand has 70 places, 79 transitions, 1112 flow. Second operand 4 states and 460 transitions. [2022-12-13 11:08:57,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 124 transitions, 1831 flow [2022-12-13 11:08:57,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 124 transitions, 1731 flow, removed 27 selfloop flow, removed 3 redundant places. [2022-12-13 11:08:57,743 INFO L231 Difference]: Finished difference. Result has 69 places, 96 transitions, 1497 flow [2022-12-13 11:08:57,743 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=1046, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1497, PETRI_PLACES=69, PETRI_TRANSITIONS=96} [2022-12-13 11:08:57,744 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 27 predicate places. [2022-12-13 11:08:57,744 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 96 transitions, 1497 flow [2022-12-13 11:08:57,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 108.5) internal successors, (434), 4 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:57,744 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:08:57,744 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:08:57,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-13 11:08:57,745 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-13 11:08:57,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:08:57,745 INFO L85 PathProgramCache]: Analyzing trace with hash 305643465, now seen corresponding path program 5 times [2022-12-13 11:08:57,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:08:57,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992797046] [2022-12-13 11:08:57,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:08:57,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:08:57,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:08:57,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:08:57,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:08:57,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992797046] [2022-12-13 11:08:57,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992797046] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:08:57,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:08:57,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 11:08:57,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103521104] [2022-12-13 11:08:57,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:08:57,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 11:08:57,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:08:57,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 11:08:57,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 11:08:57,871 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 234 [2022-12-13 11:08:57,872 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 96 transitions, 1497 flow. Second operand has 5 states, 5 states have (on average 105.8) internal successors, (529), 5 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:57,872 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:08:57,872 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 234 [2022-12-13 11:08:57,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:08:58,100 INFO L130 PetriNetUnfolder]: 1059/1588 cut-off events. [2022-12-13 11:08:58,100 INFO L131 PetriNetUnfolder]: For 18592/18704 co-relation queries the response was YES. [2022-12-13 11:08:58,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10650 conditions, 1588 events. 1059/1588 cut-off events. For 18592/18704 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 7045 event pairs, 277 based on Foata normal form. 136/1706 useless extension candidates. Maximal degree in co-relation 10626. Up to 967 conditions per place. [2022-12-13 11:08:58,108 INFO L137 encePairwiseOnDemand]: 228/234 looper letters, 81 selfloop transitions, 29 changer transitions 10/122 dead transitions. [2022-12-13 11:08:58,108 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 122 transitions, 1974 flow [2022-12-13 11:08:58,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 11:08:58,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 11:08:58,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 552 transitions. [2022-12-13 11:08:58,109 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4717948717948718 [2022-12-13 11:08:58,109 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 552 transitions. [2022-12-13 11:08:58,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 552 transitions. [2022-12-13 11:08:58,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:08:58,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 552 transitions. [2022-12-13 11:08:58,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 110.4) internal successors, (552), 5 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:58,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:58,112 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:58,112 INFO L175 Difference]: Start difference. First operand has 69 places, 96 transitions, 1497 flow. Second operand 5 states and 552 transitions. [2022-12-13 11:08:58,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 122 transitions, 1974 flow [2022-12-13 11:08:58,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 122 transitions, 1903 flow, removed 21 selfloop flow, removed 1 redundant places. [2022-12-13 11:08:58,126 INFO L231 Difference]: Finished difference. Result has 75 places, 95 transitions, 1525 flow [2022-12-13 11:08:58,126 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=1426, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1525, PETRI_PLACES=75, PETRI_TRANSITIONS=95} [2022-12-13 11:08:58,126 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 33 predicate places. [2022-12-13 11:08:58,126 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 95 transitions, 1525 flow [2022-12-13 11:08:58,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 105.8) internal successors, (529), 5 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:58,127 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:08:58,127 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:08:58,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-13 11:08:58,127 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-13 11:08:58,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:08:58,127 INFO L85 PathProgramCache]: Analyzing trace with hash 568405857, now seen corresponding path program 1 times [2022-12-13 11:08:58,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:08:58,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39290853] [2022-12-13 11:08:58,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:08:58,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:08:58,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:08:58,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:08:58,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:08:58,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39290853] [2022-12-13 11:08:58,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39290853] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:08:58,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041552462] [2022-12-13 11:08:58,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:08:58,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:08:58,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:08:58,227 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:08:58,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 11:08:58,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:08:58,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 11:08:58,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:08:58,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:08:58,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:08:58,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:08:58,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041552462] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 11:08:58,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:08:58,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2022-12-13 11:08:58,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749614688] [2022-12-13 11:08:58,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:08:58,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:08:58,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:08:58,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:08:58,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-13 11:08:58,436 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 234 [2022-12-13 11:08:58,437 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 95 transitions, 1525 flow. Second operand has 4 states, 4 states have (on average 108.75) internal successors, (435), 4 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:58,437 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:08:58,437 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 234 [2022-12-13 11:08:58,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:08:58,654 INFO L130 PetriNetUnfolder]: 1030/1470 cut-off events. [2022-12-13 11:08:58,654 INFO L131 PetriNetUnfolder]: For 19434/19704 co-relation queries the response was YES. [2022-12-13 11:08:58,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10656 conditions, 1470 events. 1030/1470 cut-off events. For 19434/19704 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 5818 event pairs, 112 based on Foata normal form. 112/1509 useless extension candidates. Maximal degree in co-relation 10629. Up to 1080 conditions per place. [2022-12-13 11:08:58,663 INFO L137 encePairwiseOnDemand]: 229/234 looper letters, 84 selfloop transitions, 32 changer transitions 1/123 dead transitions. [2022-12-13 11:08:58,663 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 123 transitions, 2042 flow [2022-12-13 11:08:58,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 11:08:58,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 11:08:58,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 457 transitions. [2022-12-13 11:08:58,664 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48824786324786323 [2022-12-13 11:08:58,664 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 457 transitions. [2022-12-13 11:08:58,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 457 transitions. [2022-12-13 11:08:58,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:08:58,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 457 transitions. [2022-12-13 11:08:58,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 114.25) internal successors, (457), 4 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:58,666 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:58,666 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:58,666 INFO L175 Difference]: Start difference. First operand has 75 places, 95 transitions, 1525 flow. Second operand 4 states and 457 transitions. [2022-12-13 11:08:58,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 123 transitions, 2042 flow [2022-12-13 11:08:58,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 123 transitions, 1853 flow, removed 46 selfloop flow, removed 6 redundant places. [2022-12-13 11:08:58,679 INFO L231 Difference]: Finished difference. Result has 71 places, 100 transitions, 1537 flow [2022-12-13 11:08:58,679 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=1360, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1537, PETRI_PLACES=71, PETRI_TRANSITIONS=100} [2022-12-13 11:08:58,679 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 29 predicate places. [2022-12-13 11:08:58,680 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 100 transitions, 1537 flow [2022-12-13 11:08:58,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 108.75) internal successors, (435), 4 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:58,680 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:08:58,680 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:08:58,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 11:08:58,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:08:58,881 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-13 11:08:58,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:08:58,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1174704447, now seen corresponding path program 1 times [2022-12-13 11:08:58,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:08:58,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666411617] [2022-12-13 11:08:58,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:08:58,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:08:58,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:08:59,082 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:08:59,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:08:59,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666411617] [2022-12-13 11:08:59,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666411617] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:08:59,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562262202] [2022-12-13 11:08:59,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:08:59,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:08:59,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:08:59,083 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:08:59,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 11:08:59,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:08:59,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 11:08:59,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:08:59,305 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:08:59,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:08:59,415 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:08:59,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562262202] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:08:59,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:08:59,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 8 [2022-12-13 11:08:59,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383397468] [2022-12-13 11:08:59,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:08:59,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 11:08:59,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:08:59,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 11:08:59,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-12-13 11:08:59,449 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 234 [2022-12-13 11:08:59,450 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 100 transitions, 1537 flow. Second operand has 10 states, 10 states have (on average 106.0) internal successors, (1060), 10 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:59,450 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:08:59,451 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 234 [2022-12-13 11:08:59,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:08:59,878 INFO L130 PetriNetUnfolder]: 1454/2075 cut-off events. [2022-12-13 11:08:59,878 INFO L131 PetriNetUnfolder]: For 23893/24452 co-relation queries the response was YES. [2022-12-13 11:08:59,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13997 conditions, 2075 events. 1454/2075 cut-off events. For 23893/24452 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 8373 event pairs, 48 based on Foata normal form. 160/2109 useless extension candidates. Maximal degree in co-relation 13972. Up to 1471 conditions per place. [2022-12-13 11:08:59,894 INFO L137 encePairwiseOnDemand]: 229/234 looper letters, 126 selfloop transitions, 58 changer transitions 2/196 dead transitions. [2022-12-13 11:08:59,895 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 196 transitions, 2629 flow [2022-12-13 11:08:59,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 11:08:59,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 11:08:59,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1020 transitions. [2022-12-13 11:08:59,897 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4843304843304843 [2022-12-13 11:08:59,897 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1020 transitions. [2022-12-13 11:08:59,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1020 transitions. [2022-12-13 11:08:59,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:08:59,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1020 transitions. [2022-12-13 11:08:59,900 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 113.33333333333333) internal successors, (1020), 9 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:59,903 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 234.0) internal successors, (2340), 10 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:59,904 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 234.0) internal successors, (2340), 10 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:59,904 INFO L175 Difference]: Start difference. First operand has 71 places, 100 transitions, 1537 flow. Second operand 9 states and 1020 transitions. [2022-12-13 11:08:59,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 196 transitions, 2629 flow [2022-12-13 11:08:59,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 196 transitions, 2484 flow, removed 29 selfloop flow, removed 3 redundant places. [2022-12-13 11:08:59,922 INFO L231 Difference]: Finished difference. Result has 79 places, 136 transitions, 2135 flow [2022-12-13 11:08:59,922 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=1407, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2135, PETRI_PLACES=79, PETRI_TRANSITIONS=136} [2022-12-13 11:08:59,922 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 37 predicate places. [2022-12-13 11:08:59,922 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 136 transitions, 2135 flow [2022-12-13 11:08:59,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 106.0) internal successors, (1060), 10 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:08:59,923 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:08:59,923 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:08:59,928 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 11:09:00,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:09:00,124 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-13 11:09:00,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:09:00,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1652446401, now seen corresponding path program 2 times [2022-12-13 11:09:00,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:09:00,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671971835] [2022-12-13 11:09:00,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:09:00,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:09:00,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:09:00,422 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:09:00,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:09:00,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671971835] [2022-12-13 11:09:00,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671971835] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:09:00,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894268256] [2022-12-13 11:09:00,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:09:00,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:09:00,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:09:00,423 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:09:00,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 11:09:00,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:09:00,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:09:00,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 11:09:00,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:09:00,649 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:09:00,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:09:00,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:09:00,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894268256] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:09:00,754 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:09:00,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 8 [2022-12-13 11:09:00,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065319499] [2022-12-13 11:09:00,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:09:00,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 11:09:00,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:09:00,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 11:09:00,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-12-13 11:09:00,797 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 234 [2022-12-13 11:09:00,798 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 136 transitions, 2135 flow. Second operand has 10 states, 10 states have (on average 106.5) internal successors, (1065), 10 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:00,799 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:09:00,799 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 234 [2022-12-13 11:09:00,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:09:01,308 INFO L130 PetriNetUnfolder]: 1788/2565 cut-off events. [2022-12-13 11:09:01,308 INFO L131 PetriNetUnfolder]: For 30426/30945 co-relation queries the response was YES. [2022-12-13 11:09:01,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17684 conditions, 2565 events. 1788/2565 cut-off events. For 30426/30945 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 10786 event pairs, 188 based on Foata normal form. 154/2581 useless extension candidates. Maximal degree in co-relation 17656. Up to 1995 conditions per place. [2022-12-13 11:09:01,320 INFO L137 encePairwiseOnDemand]: 229/234 looper letters, 141 selfloop transitions, 58 changer transitions 2/211 dead transitions. [2022-12-13 11:09:01,320 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 211 transitions, 3024 flow [2022-12-13 11:09:01,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 11:09:01,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 11:09:01,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1016 transitions. [2022-12-13 11:09:01,322 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48243114909781576 [2022-12-13 11:09:01,322 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1016 transitions. [2022-12-13 11:09:01,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1016 transitions. [2022-12-13 11:09:01,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:09:01,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1016 transitions. [2022-12-13 11:09:01,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 112.88888888888889) internal successors, (1016), 9 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:01,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 234.0) internal successors, (2340), 10 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:01,326 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 234.0) internal successors, (2340), 10 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:01,326 INFO L175 Difference]: Start difference. First operand has 79 places, 136 transitions, 2135 flow. Second operand 9 states and 1016 transitions. [2022-12-13 11:09:01,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 211 transitions, 3024 flow [2022-12-13 11:09:01,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 211 transitions, 2770 flow, removed 116 selfloop flow, removed 1 redundant places. [2022-12-13 11:09:01,356 INFO L231 Difference]: Finished difference. Result has 89 places, 155 transitions, 2339 flow [2022-12-13 11:09:01,356 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=1881, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2339, PETRI_PLACES=89, PETRI_TRANSITIONS=155} [2022-12-13 11:09:01,357 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 47 predicate places. [2022-12-13 11:09:01,357 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 155 transitions, 2339 flow [2022-12-13 11:09:01,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 106.5) internal successors, (1065), 10 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:01,357 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:09:01,357 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:09:01,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-13 11:09:01,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-13 11:09:01,558 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-13 11:09:01,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:09:01,558 INFO L85 PathProgramCache]: Analyzing trace with hash 32652491, now seen corresponding path program 3 times [2022-12-13 11:09:01,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:09:01,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054808648] [2022-12-13 11:09:01,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:09:01,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:09:01,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:09:01,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:09:01,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:09:01,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054808648] [2022-12-13 11:09:01,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054808648] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:09:01,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629815186] [2022-12-13 11:09:01,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 11:09:01,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:09:01,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:09:01,748 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:09:01,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 11:09:01,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 11:09:01,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:09:01,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 11:09:01,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:09:01,993 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:09:01,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:09:02,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:09:02,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629815186] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:09:02,104 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:09:02,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 9 [2022-12-13 11:09:02,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278536330] [2022-12-13 11:09:02,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:09:02,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 11:09:02,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:09:02,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 11:09:02,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-12-13 11:09:02,159 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 234 [2022-12-13 11:09:02,160 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 155 transitions, 2339 flow. Second operand has 11 states, 11 states have (on average 106.36363636363636) internal successors, (1170), 11 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:02,161 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:09:02,161 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 234 [2022-12-13 11:09:02,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:09:02,849 INFO L130 PetriNetUnfolder]: 2248/3231 cut-off events. [2022-12-13 11:09:02,850 INFO L131 PetriNetUnfolder]: For 38644/39253 co-relation queries the response was YES. [2022-12-13 11:09:02,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21564 conditions, 3231 events. 2248/3231 cut-off events. For 38644/39253 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 14241 event pairs, 350 based on Foata normal form. 196/3277 useless extension candidates. Maximal degree in co-relation 21532. Up to 2645 conditions per place. [2022-12-13 11:09:02,864 INFO L137 encePairwiseOnDemand]: 229/234 looper letters, 177 selfloop transitions, 58 changer transitions 2/247 dead transitions. [2022-12-13 11:09:02,864 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 247 transitions, 3597 flow [2022-12-13 11:09:02,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 11:09:02,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 11:09:02,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1016 transitions. [2022-12-13 11:09:02,867 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48243114909781576 [2022-12-13 11:09:02,867 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1016 transitions. [2022-12-13 11:09:02,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1016 transitions. [2022-12-13 11:09:02,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:09:02,868 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1016 transitions. [2022-12-13 11:09:02,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 112.88888888888889) internal successors, (1016), 9 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:02,871 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 234.0) internal successors, (2340), 10 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:02,871 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 234.0) internal successors, (2340), 10 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:02,871 INFO L175 Difference]: Start difference. First operand has 89 places, 155 transitions, 2339 flow. Second operand 9 states and 1016 transitions. [2022-12-13 11:09:02,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 247 transitions, 3597 flow [2022-12-13 11:09:02,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 247 transitions, 3350 flow, removed 101 selfloop flow, removed 2 redundant places. [2022-12-13 11:09:02,893 INFO L231 Difference]: Finished difference. Result has 99 places, 191 transitions, 2892 flow [2022-12-13 11:09:02,893 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=2092, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2892, PETRI_PLACES=99, PETRI_TRANSITIONS=191} [2022-12-13 11:09:02,893 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 57 predicate places. [2022-12-13 11:09:02,893 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 191 transitions, 2892 flow [2022-12-13 11:09:02,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 106.36363636363636) internal successors, (1170), 11 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:02,894 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:09:02,894 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:09:02,898 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 11:09:03,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:09:03,096 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-13 11:09:03,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:09:03,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1510118523, now seen corresponding path program 4 times [2022-12-13 11:09:03,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:09:03,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734680310] [2022-12-13 11:09:03,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:09:03,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:09:03,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:09:03,291 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:09:03,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:09:03,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734680310] [2022-12-13 11:09:03,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734680310] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:09:03,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015105315] [2022-12-13 11:09:03,291 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 11:09:03,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:09:03,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:09:03,292 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:09:03,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 11:09:03,410 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 11:09:03,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:09:03,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 11:09:03,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:09:03,507 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:09:03,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:09:03,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:09:03,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015105315] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:09:03,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:09:03,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 7 [2022-12-13 11:09:03,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078161645] [2022-12-13 11:09:03,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:09:03,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 11:09:03,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:09:03,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 11:09:03,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-12-13 11:09:03,632 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 234 [2022-12-13 11:09:03,632 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 191 transitions, 2892 flow. Second operand has 9 states, 9 states have (on average 106.33333333333333) internal successors, (957), 9 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:03,632 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:09:03,632 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 234 [2022-12-13 11:09:03,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:09:04,296 INFO L130 PetriNetUnfolder]: 2556/3683 cut-off events. [2022-12-13 11:09:04,296 INFO L131 PetriNetUnfolder]: For 44540/45151 co-relation queries the response was YES. [2022-12-13 11:09:04,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24361 conditions, 3683 events. 2556/3683 cut-off events. For 44540/45151 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 16670 event pairs, 494 based on Foata normal form. 194/3721 useless extension candidates. Maximal degree in co-relation 24324. Up to 3161 conditions per place. [2022-12-13 11:09:04,314 INFO L137 encePairwiseOnDemand]: 229/234 looper letters, 190 selfloop transitions, 58 changer transitions 2/260 dead transitions. [2022-12-13 11:09:04,314 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 260 transitions, 3928 flow [2022-12-13 11:09:04,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 11:09:04,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 11:09:04,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1010 transitions. [2022-12-13 11:09:04,316 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4795821462488129 [2022-12-13 11:09:04,316 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1010 transitions. [2022-12-13 11:09:04,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1010 transitions. [2022-12-13 11:09:04,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:09:04,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1010 transitions. [2022-12-13 11:09:04,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 112.22222222222223) internal successors, (1010), 9 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:04,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 234.0) internal successors, (2340), 10 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:04,319 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 234.0) internal successors, (2340), 10 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:04,319 INFO L175 Difference]: Start difference. First operand has 99 places, 191 transitions, 2892 flow. Second operand 9 states and 1010 transitions. [2022-12-13 11:09:04,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 260 transitions, 3928 flow [2022-12-13 11:09:04,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 260 transitions, 3626 flow, removed 140 selfloop flow, removed 1 redundant places. [2022-12-13 11:09:04,354 INFO L231 Difference]: Finished difference. Result has 109 places, 210 transitions, 3097 flow [2022-12-13 11:09:04,354 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=2590, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3097, PETRI_PLACES=109, PETRI_TRANSITIONS=210} [2022-12-13 11:09:04,354 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 67 predicate places. [2022-12-13 11:09:04,354 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 210 transitions, 3097 flow [2022-12-13 11:09:04,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 106.33333333333333) internal successors, (957), 9 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:04,355 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:09:04,355 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:09:04,359 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 11:09:04,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:09:04,556 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-13 11:09:04,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:09:04,557 INFO L85 PathProgramCache]: Analyzing trace with hash -400011515, now seen corresponding path program 5 times [2022-12-13 11:09:04,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:09:04,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629940655] [2022-12-13 11:09:04,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:09:04,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:09:04,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:09:04,734 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:09:04,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:09:04,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629940655] [2022-12-13 11:09:04,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629940655] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:09:04,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138679054] [2022-12-13 11:09:04,735 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 11:09:04,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:09:04,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:09:04,736 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:09:04,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 11:09:04,829 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 11:09:04,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:09:04,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 11:09:04,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:09:04,910 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:09:04,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:09:04,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:09:04,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138679054] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:09:04,983 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:09:04,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 8 [2022-12-13 11:09:04,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899165531] [2022-12-13 11:09:04,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:09:04,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 11:09:04,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:09:04,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 11:09:04,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-12-13 11:09:05,019 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 234 [2022-12-13 11:09:05,019 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 210 transitions, 3097 flow. Second operand has 10 states, 10 states have (on average 106.7) internal successors, (1067), 10 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:05,019 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:09:05,019 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 234 [2022-12-13 11:09:05,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:09:05,734 INFO L130 PetriNetUnfolder]: 2930/4227 cut-off events. [2022-12-13 11:09:05,734 INFO L131 PetriNetUnfolder]: For 50345/50986 co-relation queries the response was YES. [2022-12-13 11:09:05,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27481 conditions, 4227 events. 2930/4227 cut-off events. For 50345/50986 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 19714 event pairs, 614 based on Foata normal form. 192/4241 useless extension candidates. Maximal degree in co-relation 27440. Up to 3717 conditions per place. [2022-12-13 11:09:05,755 INFO L137 encePairwiseOnDemand]: 229/234 looper letters, 224 selfloop transitions, 53 changer transitions 2/289 dead transitions. [2022-12-13 11:09:05,755 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 289 transitions, 4442 flow [2022-12-13 11:09:05,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 11:09:05,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 11:09:05,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1008 transitions. [2022-12-13 11:09:05,757 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47863247863247865 [2022-12-13 11:09:05,757 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1008 transitions. [2022-12-13 11:09:05,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1008 transitions. [2022-12-13 11:09:05,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:09:05,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1008 transitions. [2022-12-13 11:09:05,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 112.0) internal successors, (1008), 9 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:05,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 234.0) internal successors, (2340), 10 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:05,759 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 234.0) internal successors, (2340), 10 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:05,759 INFO L175 Difference]: Start difference. First operand has 109 places, 210 transitions, 3097 flow. Second operand 9 states and 1008 transitions. [2022-12-13 11:09:05,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 289 transitions, 4442 flow [2022-12-13 11:09:05,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 289 transitions, 4153 flow, removed 122 selfloop flow, removed 2 redundant places. [2022-12-13 11:09:05,801 INFO L231 Difference]: Finished difference. Result has 119 places, 241 transitions, 3583 flow [2022-12-13 11:09:05,801 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=2808, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3583, PETRI_PLACES=119, PETRI_TRANSITIONS=241} [2022-12-13 11:09:05,802 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 77 predicate places. [2022-12-13 11:09:05,802 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 241 transitions, 3583 flow [2022-12-13 11:09:05,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 106.7) internal successors, (1067), 10 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:05,802 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:09:05,802 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:09:05,806 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 11:09:06,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-13 11:09:06,004 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-13 11:09:06,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:09:06,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1540657839, now seen corresponding path program 6 times [2022-12-13 11:09:06,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:09:06,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908627104] [2022-12-13 11:09:06,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:09:06,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:09:06,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:09:06,198 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:09:06,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:09:06,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908627104] [2022-12-13 11:09:06,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908627104] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:09:06,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503805075] [2022-12-13 11:09:06,198 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 11:09:06,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:09:06,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:09:06,199 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:09:06,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 11:09:06,300 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-13 11:09:06,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:09:06,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 11:09:06,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:09:06,386 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:09:06,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:09:06,468 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:09:06,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503805075] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:09:06,468 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:09:06,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 8 [2022-12-13 11:09:06,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114180482] [2022-12-13 11:09:06,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:09:06,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 11:09:06,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:09:06,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 11:09:06,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-12-13 11:09:06,496 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 234 [2022-12-13 11:09:06,497 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 241 transitions, 3583 flow. Second operand has 10 states, 10 states have (on average 106.6) internal successors, (1066), 10 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:06,497 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:09:06,497 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 234 [2022-12-13 11:09:06,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:09:07,295 INFO L130 PetriNetUnfolder]: 3264/4717 cut-off events. [2022-12-13 11:09:07,295 INFO L131 PetriNetUnfolder]: For 58812/59459 co-relation queries the response was YES. [2022-12-13 11:09:07,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30666 conditions, 4717 events. 3264/4717 cut-off events. For 58812/59459 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 22525 event pairs, 766 based on Foata normal form. 200/4735 useless extension candidates. Maximal degree in co-relation 30620. Up to 4175 conditions per place. [2022-12-13 11:09:07,320 INFO L137 encePairwiseOnDemand]: 229/234 looper letters, 245 selfloop transitions, 53 changer transitions 2/310 dead transitions. [2022-12-13 11:09:07,320 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 310 transitions, 4819 flow [2022-12-13 11:09:07,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 11:09:07,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 11:09:07,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1010 transitions. [2022-12-13 11:09:07,321 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4795821462488129 [2022-12-13 11:09:07,321 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1010 transitions. [2022-12-13 11:09:07,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1010 transitions. [2022-12-13 11:09:07,321 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:09:07,321 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1010 transitions. [2022-12-13 11:09:07,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 112.22222222222223) internal successors, (1010), 9 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:07,323 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 234.0) internal successors, (2340), 10 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:07,323 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 234.0) internal successors, (2340), 10 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:07,324 INFO L175 Difference]: Start difference. First operand has 119 places, 241 transitions, 3583 flow. Second operand 9 states and 1010 transitions. [2022-12-13 11:09:07,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 310 transitions, 4819 flow [2022-12-13 11:09:07,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 310 transitions, 4433 flow, removed 182 selfloop flow, removed 1 redundant places. [2022-12-13 11:09:07,371 INFO L231 Difference]: Finished difference. Result has 129 places, 260 transitions, 3771 flow [2022-12-13 11:09:07,371 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=3197, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3771, PETRI_PLACES=129, PETRI_TRANSITIONS=260} [2022-12-13 11:09:07,372 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 87 predicate places. [2022-12-13 11:09:07,372 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 260 transitions, 3771 flow [2022-12-13 11:09:07,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 106.6) internal successors, (1066), 10 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:07,372 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:09:07,372 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:09:07,376 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 11:09:07,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-13 11:09:07,574 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-13 11:09:07,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:09:07,575 INFO L85 PathProgramCache]: Analyzing trace with hash 566635585, now seen corresponding path program 7 times [2022-12-13 11:09:07,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:09:07,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074250356] [2022-12-13 11:09:07,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:09:07,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:09:07,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:09:07,687 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:09:07,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:09:07,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074250356] [2022-12-13 11:09:07,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074250356] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:09:07,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502430071] [2022-12-13 11:09:07,688 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 11:09:07,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:09:07,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:09:07,689 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:09:07,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 11:09:07,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:09:07,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 11:09:07,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:09:07,807 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:09:07,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:09:07,856 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:09:07,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502430071] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:09:07,856 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:09:07,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2022-12-13 11:09:07,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6928966] [2022-12-13 11:09:07,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:09:07,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 11:09:07,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:09:07,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 11:09:07,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-12-13 11:09:07,931 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 234 [2022-12-13 11:09:07,933 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 260 transitions, 3771 flow. Second operand has 12 states, 12 states have (on average 105.0) internal successors, (1260), 12 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:07,934 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:09:07,934 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 234 [2022-12-13 11:09:07,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:09:09,437 INFO L130 PetriNetUnfolder]: 6120/8962 cut-off events. [2022-12-13 11:09:09,438 INFO L131 PetriNetUnfolder]: For 98020/98283 co-relation queries the response was YES. [2022-12-13 11:09:09,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54582 conditions, 8962 events. 6120/8962 cut-off events. For 98020/98283 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 46631 event pairs, 1202 based on Foata normal form. 179/9073 useless extension candidates. Maximal degree in co-relation 54532. Up to 2503 conditions per place. [2022-12-13 11:09:09,488 INFO L137 encePairwiseOnDemand]: 229/234 looper letters, 397 selfloop transitions, 108 changer transitions 0/509 dead transitions. [2022-12-13 11:09:09,489 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 509 transitions, 7840 flow [2022-12-13 11:09:09,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 11:09:09,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 11:09:09,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1140 transitions. [2022-12-13 11:09:09,491 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48717948717948717 [2022-12-13 11:09:09,491 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1140 transitions. [2022-12-13 11:09:09,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1140 transitions. [2022-12-13 11:09:09,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:09:09,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1140 transitions. [2022-12-13 11:09:09,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 114.0) internal successors, (1140), 10 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:09,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 234.0) internal successors, (2574), 11 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:09,494 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 234.0) internal successors, (2574), 11 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:09,494 INFO L175 Difference]: Start difference. First operand has 129 places, 260 transitions, 3771 flow. Second operand 10 states and 1140 transitions. [2022-12-13 11:09:09,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 509 transitions, 7840 flow [2022-12-13 11:09:09,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 509 transitions, 7231 flow, removed 281 selfloop flow, removed 2 redundant places. [2022-12-13 11:09:09,634 INFO L231 Difference]: Finished difference. Result has 143 places, 313 transitions, 4573 flow [2022-12-13 11:09:09,634 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=3398, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4573, PETRI_PLACES=143, PETRI_TRANSITIONS=313} [2022-12-13 11:09:09,634 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 101 predicate places. [2022-12-13 11:09:09,635 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 313 transitions, 4573 flow [2022-12-13 11:09:09,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 105.0) internal successors, (1260), 12 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:09,635 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:09:09,635 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:09:09,639 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 11:09:09,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-13 11:09:09,837 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-13 11:09:09,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:09:09,838 INFO L85 PathProgramCache]: Analyzing trace with hash -346470857, now seen corresponding path program 8 times [2022-12-13 11:09:09,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:09:09,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866361816] [2022-12-13 11:09:09,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:09:09,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:09:09,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:09:09,996 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:09:09,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:09:09,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866361816] [2022-12-13 11:09:09,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866361816] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:09:09,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547814996] [2022-12-13 11:09:09,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:09:09,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:09:09,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:09:09,998 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:09:09,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 11:09:10,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:09:10,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:09:10,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 11:09:10,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:09:10,117 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:09:10,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:09:10,181 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:09:10,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547814996] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:09:10,182 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:09:10,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-12-13 11:09:10,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682659315] [2022-12-13 11:09:10,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:09:10,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 11:09:10,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:09:10,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 11:09:10,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-12-13 11:09:10,274 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 234 [2022-12-13 11:09:10,275 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 313 transitions, 4573 flow. Second operand has 12 states, 12 states have (on average 104.58333333333333) internal successors, (1255), 12 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:10,275 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:09:10,276 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 234 [2022-12-13 11:09:10,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:09:12,179 INFO L130 PetriNetUnfolder]: 6667/9963 cut-off events. [2022-12-13 11:09:12,179 INFO L131 PetriNetUnfolder]: For 128581/128992 co-relation queries the response was YES. [2022-12-13 11:09:12,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61110 conditions, 9963 events. 6667/9963 cut-off events. For 128581/128992 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 56054 event pairs, 1131 based on Foata normal form. 348/10271 useless extension candidates. Maximal degree in co-relation 61052. Up to 3525 conditions per place. [2022-12-13 11:09:12,248 INFO L137 encePairwiseOnDemand]: 228/234 looper letters, 559 selfloop transitions, 154 changer transitions 0/717 dead transitions. [2022-12-13 11:09:12,248 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 717 transitions, 10776 flow [2022-12-13 11:09:12,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 11:09:12,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 11:09:12,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1348 transitions. [2022-12-13 11:09:12,250 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48005698005698005 [2022-12-13 11:09:12,250 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1348 transitions. [2022-12-13 11:09:12,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1348 transitions. [2022-12-13 11:09:12,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:09:12,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1348 transitions. [2022-12-13 11:09:12,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 112.33333333333333) internal successors, (1348), 12 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:12,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 234.0) internal successors, (3042), 13 states have internal predecessors, (3042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:12,255 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 234.0) internal successors, (3042), 13 states have internal predecessors, (3042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:12,255 INFO L175 Difference]: Start difference. First operand has 143 places, 313 transitions, 4573 flow. Second operand 12 states and 1348 transitions. [2022-12-13 11:09:12,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 717 transitions, 10776 flow [2022-12-13 11:09:12,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 717 transitions, 10699 flow, removed 8 selfloop flow, removed 2 redundant places. [2022-12-13 11:09:12,485 INFO L231 Difference]: Finished difference. Result has 158 places, 405 transitions, 6407 flow [2022-12-13 11:09:12,485 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=4519, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6407, PETRI_PLACES=158, PETRI_TRANSITIONS=405} [2022-12-13 11:09:12,486 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 116 predicate places. [2022-12-13 11:09:12,486 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 405 transitions, 6407 flow [2022-12-13 11:09:12,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 104.58333333333333) internal successors, (1255), 12 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:12,486 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:09:12,486 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:09:12,490 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 11:09:12,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-13 11:09:12,688 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-13 11:09:12,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:09:12,689 INFO L85 PathProgramCache]: Analyzing trace with hash -458317283, now seen corresponding path program 9 times [2022-12-13 11:09:12,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:09:12,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529060653] [2022-12-13 11:09:12,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:09:12,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:09:12,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:09:12,822 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:09:12,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:09:12,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529060653] [2022-12-13 11:09:12,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529060653] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:09:12,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239749816] [2022-12-13 11:09:12,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 11:09:12,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:09:12,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:09:12,824 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:09:12,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 11:09:12,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 11:09:12,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:09:12,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 11:09:12,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:09:12,939 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:09:12,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:09:12,994 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:09:12,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239749816] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:09:12,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:09:12,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-12-13 11:09:12,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14477982] [2022-12-13 11:09:12,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:09:12,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 11:09:12,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:09:12,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 11:09:12,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-12-13 11:09:13,106 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 234 [2022-12-13 11:09:13,108 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 405 transitions, 6407 flow. Second operand has 13 states, 13 states have (on average 102.61538461538461) internal successors, (1334), 13 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:13,108 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:09:13,108 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 234 [2022-12-13 11:09:13,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:09:16,201 INFO L130 PetriNetUnfolder]: 9208/13757 cut-off events. [2022-12-13 11:09:16,201 INFO L131 PetriNetUnfolder]: For 197907/197907 co-relation queries the response was YES. [2022-12-13 11:09:16,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97851 conditions, 13757 events. 9208/13757 cut-off events. For 197907/197907 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 80265 event pairs, 1357 based on Foata normal form. 136/13893 useless extension candidates. Maximal degree in co-relation 97787. Up to 3859 conditions per place. [2022-12-13 11:09:16,318 INFO L137 encePairwiseOnDemand]: 227/234 looper letters, 486 selfloop transitions, 321 changer transitions 0/807 dead transitions. [2022-12-13 11:09:16,318 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 807 transitions, 14136 flow [2022-12-13 11:09:16,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 11:09:16,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-13 11:09:16,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2092 transitions. [2022-12-13 11:09:16,322 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4705353126405758 [2022-12-13 11:09:16,322 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2092 transitions. [2022-12-13 11:09:16,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2092 transitions. [2022-12-13 11:09:16,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:09:16,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2092 transitions. [2022-12-13 11:09:16,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 110.10526315789474) internal successors, (2092), 19 states have internal predecessors, (2092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:16,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 234.0) internal successors, (4680), 20 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:16,329 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 234.0) internal successors, (4680), 20 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:16,329 INFO L175 Difference]: Start difference. First operand has 158 places, 405 transitions, 6407 flow. Second operand 19 states and 2092 transitions. [2022-12-13 11:09:16,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 807 transitions, 14136 flow [2022-12-13 11:09:17,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 807 transitions, 13710 flow, removed 213 selfloop flow, removed 0 redundant places. [2022-12-13 11:09:17,084 INFO L231 Difference]: Finished difference. Result has 188 places, 555 transitions, 10228 flow [2022-12-13 11:09:17,084 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=6177, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=10228, PETRI_PLACES=188, PETRI_TRANSITIONS=555} [2022-12-13 11:09:17,085 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 146 predicate places. [2022-12-13 11:09:17,085 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 555 transitions, 10228 flow [2022-12-13 11:09:17,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 102.61538461538461) internal successors, (1334), 13 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:17,085 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:09:17,085 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:09:17,090 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 11:09:17,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-13 11:09:17,286 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-13 11:09:17,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:09:17,287 INFO L85 PathProgramCache]: Analyzing trace with hash 336497801, now seen corresponding path program 10 times [2022-12-13 11:09:17,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:09:17,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913639360] [2022-12-13 11:09:17,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:09:17,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:09:17,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:09:17,435 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:09:17,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:09:17,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913639360] [2022-12-13 11:09:17,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913639360] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:09:17,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753404665] [2022-12-13 11:09:17,435 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 11:09:17,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:09:17,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:09:17,437 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:09:17,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 11:09:17,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 11:09:17,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:09:17,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 11:09:17,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:09:17,578 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:09:17,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:09:17,647 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:09:17,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753404665] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:09:17,647 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:09:17,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-12-13 11:09:17,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586375409] [2022-12-13 11:09:17,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:09:17,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 11:09:17,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:09:17,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 11:09:17,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-12-13 11:09:17,788 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 234 [2022-12-13 11:09:17,789 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 555 transitions, 10228 flow. Second operand has 16 states, 16 states have (on average 100.875) internal successors, (1614), 16 states have internal predecessors, (1614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:17,789 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:09:17,789 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 234 [2022-12-13 11:09:17,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:09:22,989 INFO L130 PetriNetUnfolder]: 11520/17237 cut-off events. [2022-12-13 11:09:22,989 INFO L131 PetriNetUnfolder]: For 383576/383576 co-relation queries the response was YES. [2022-12-13 11:09:23,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147254 conditions, 17237 events. 11520/17237 cut-off events. For 383576/383576 co-relation queries the response was YES. Maximal size of possible extension queue 659. Compared 105659 event pairs, 741 based on Foata normal form. 500/17737 useless extension candidates. Maximal degree in co-relation 147177. Up to 5121 conditions per place. [2022-12-13 11:09:23,156 INFO L137 encePairwiseOnDemand]: 225/234 looper letters, 839 selfloop transitions, 706 changer transitions 56/1601 dead transitions. [2022-12-13 11:09:23,156 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 1601 transitions, 34018 flow [2022-12-13 11:09:23,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-12-13 11:09:23,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-12-13 11:09:23,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 5396 transitions. [2022-12-13 11:09:23,163 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4521535109770404 [2022-12-13 11:09:23,163 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 5396 transitions. [2022-12-13 11:09:23,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 5396 transitions. [2022-12-13 11:09:23,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:09:23,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 5396 transitions. [2022-12-13 11:09:23,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 105.80392156862744) internal successors, (5396), 51 states have internal predecessors, (5396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:23,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 234.0) internal successors, (12168), 52 states have internal predecessors, (12168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:23,182 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 234.0) internal successors, (12168), 52 states have internal predecessors, (12168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:23,182 INFO L175 Difference]: Start difference. First operand has 188 places, 555 transitions, 10228 flow. Second operand 51 states and 5396 transitions. [2022-12-13 11:09:23,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 1601 transitions, 34018 flow [2022-12-13 11:09:25,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 1601 transitions, 32892 flow, removed 563 selfloop flow, removed 0 redundant places. [2022-12-13 11:09:25,391 INFO L231 Difference]: Finished difference. Result has 269 places, 1000 transitions, 21902 flow [2022-12-13 11:09:25,391 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=9449, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=252, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=21902, PETRI_PLACES=269, PETRI_TRANSITIONS=1000} [2022-12-13 11:09:25,392 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 227 predicate places. [2022-12-13 11:09:25,392 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 1000 transitions, 21902 flow [2022-12-13 11:09:25,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 100.875) internal successors, (1614), 16 states have internal predecessors, (1614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:25,393 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:09:25,393 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:09:25,397 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 11:09:25,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:09:25,594 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-13 11:09:25,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:09:25,596 INFO L85 PathProgramCache]: Analyzing trace with hash 15140509, now seen corresponding path program 11 times [2022-12-13 11:09:25,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:09:25,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481482438] [2022-12-13 11:09:25,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:09:25,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:09:25,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:09:25,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:09:25,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:09:25,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481482438] [2022-12-13 11:09:25,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481482438] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:09:25,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966288243] [2022-12-13 11:09:25,760 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 11:09:25,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:09:25,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:09:25,761 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:09:25,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 11:09:25,836 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:09:25,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:09:25,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 11:09:25,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:09:25,889 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:09:25,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:09:25,966 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:09:25,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966288243] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:09:25,967 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:09:25,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-12-13 11:09:25,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902800477] [2022-12-13 11:09:25,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:09:25,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 11:09:25,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:09:25,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 11:09:25,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-12-13 11:09:26,076 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 234 [2022-12-13 11:09:26,077 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 1000 transitions, 21902 flow. Second operand has 15 states, 15 states have (on average 104.4) internal successors, (1566), 15 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:26,078 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:09:26,078 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 234 [2022-12-13 11:09:26,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:09:34,312 INFO L130 PetriNetUnfolder]: 15739/24494 cut-off events. [2022-12-13 11:09:34,312 INFO L131 PetriNetUnfolder]: For 844117/844812 co-relation queries the response was YES. [2022-12-13 11:09:34,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230397 conditions, 24494 events. 15739/24494 cut-off events. For 844117/844812 co-relation queries the response was YES. Maximal size of possible extension queue 1011. Compared 171669 event pairs, 2479 based on Foata normal form. 587/25024 useless extension candidates. Maximal degree in co-relation 230288. Up to 7469 conditions per place. [2022-12-13 11:09:34,657 INFO L137 encePairwiseOnDemand]: 227/234 looper letters, 974 selfloop transitions, 786 changer transitions 51/1823 dead transitions. [2022-12-13 11:09:34,657 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 1823 transitions, 40808 flow [2022-12-13 11:09:34,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 11:09:34,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-13 11:09:34,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2383 transitions. [2022-12-13 11:09:34,661 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4849409849409849 [2022-12-13 11:09:34,661 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2383 transitions. [2022-12-13 11:09:34,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2383 transitions. [2022-12-13 11:09:34,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:09:34,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2383 transitions. [2022-12-13 11:09:34,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 113.47619047619048) internal successors, (2383), 21 states have internal predecessors, (2383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:34,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 234.0) internal successors, (5148), 22 states have internal predecessors, (5148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:34,669 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 234.0) internal successors, (5148), 22 states have internal predecessors, (5148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:34,669 INFO L175 Difference]: Start difference. First operand has 269 places, 1000 transitions, 21902 flow. Second operand 21 states and 2383 transitions. [2022-12-13 11:09:34,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 1823 transitions, 40808 flow [2022-12-13 11:09:40,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 1823 transitions, 33895 flow, removed 3021 selfloop flow, removed 5 redundant places. [2022-12-13 11:09:40,518 INFO L231 Difference]: Finished difference. Result has 292 places, 1267 transitions, 25837 flow [2022-12-13 11:09:40,519 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=18230, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=993, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=536, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=25837, PETRI_PLACES=292, PETRI_TRANSITIONS=1267} [2022-12-13 11:09:40,519 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 250 predicate places. [2022-12-13 11:09:40,519 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 1267 transitions, 25837 flow [2022-12-13 11:09:40,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 104.4) internal successors, (1566), 15 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:40,519 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:09:40,519 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:09:40,524 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 11:09:40,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:09:40,721 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-13 11:09:40,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:09:40,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1621560017, now seen corresponding path program 12 times [2022-12-13 11:09:40,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:09:40,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076408153] [2022-12-13 11:09:40,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:09:40,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:09:40,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:09:40,835 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:09:40,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:09:40,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076408153] [2022-12-13 11:09:40,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076408153] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:09:40,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925560574] [2022-12-13 11:09:40,835 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 11:09:40,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:09:40,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:09:40,836 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:09:40,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 11:09:40,911 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 11:09:40,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:09:40,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 11:09:40,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:09:40,968 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:09:40,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:09:41,030 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:09:41,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925560574] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:09:41,030 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:09:41,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-12-13 11:09:41,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582410764] [2022-12-13 11:09:41,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:09:41,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 11:09:41,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:09:41,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 11:09:41,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-12-13 11:09:41,153 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 234 [2022-12-13 11:09:41,155 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 1267 transitions, 25837 flow. Second operand has 15 states, 15 states have (on average 101.53333333333333) internal successors, (1523), 15 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:41,155 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:09:41,155 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 234 [2022-12-13 11:09:41,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:09:53,468 INFO L130 PetriNetUnfolder]: 19530/30031 cut-off events. [2022-12-13 11:09:53,468 INFO L131 PetriNetUnfolder]: For 980302/980302 co-relation queries the response was YES. [2022-12-13 11:09:53,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 275358 conditions, 30031 events. 19530/30031 cut-off events. For 980302/980302 co-relation queries the response was YES. Maximal size of possible extension queue 1290. Compared 211323 event pairs, 3224 based on Foata normal form. 834/30865 useless extension candidates. Maximal degree in co-relation 275242. Up to 10319 conditions per place. [2022-12-13 11:09:53,863 INFO L137 encePairwiseOnDemand]: 225/234 looper letters, 990 selfloop transitions, 951 changer transitions 4/1945 dead transitions. [2022-12-13 11:09:53,863 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 1945 transitions, 42945 flow [2022-12-13 11:09:53,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-13 11:09:53,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-12-13 11:09:53,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 4210 transitions. [2022-12-13 11:09:53,869 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46131930747315364 [2022-12-13 11:09:53,869 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 4210 transitions. [2022-12-13 11:09:53,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 4210 transitions. [2022-12-13 11:09:53,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:09:53,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 4210 transitions. [2022-12-13 11:09:53,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 107.94871794871794) internal successors, (4210), 39 states have internal predecessors, (4210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:53,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 234.0) internal successors, (9360), 40 states have internal predecessors, (9360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:53,881 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 234.0) internal successors, (9360), 40 states have internal predecessors, (9360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:09:53,881 INFO L175 Difference]: Start difference. First operand has 292 places, 1267 transitions, 25837 flow. Second operand 39 states and 4210 transitions. [2022-12-13 11:09:53,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 1945 transitions, 42945 flow [2022-12-13 11:10:02,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 1945 transitions, 41028 flow, removed 466 selfloop flow, removed 4 redundant places. [2022-12-13 11:10:02,378 INFO L231 Difference]: Finished difference. Result has 356 places, 1519 transitions, 34061 flow [2022-12-13 11:10:02,379 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=24272, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=736, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=34061, PETRI_PLACES=356, PETRI_TRANSITIONS=1519} [2022-12-13 11:10:02,379 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 314 predicate places. [2022-12-13 11:10:02,379 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 1519 transitions, 34061 flow [2022-12-13 11:10:02,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 101.53333333333333) internal successors, (1523), 15 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:10:02,380 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:10:02,380 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:10:02,384 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 11:10:02,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-12-13 11:10:02,581 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-13 11:10:02,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:10:02,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1930202549, now seen corresponding path program 13 times [2022-12-13 11:10:02,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:10:02,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137893159] [2022-12-13 11:10:02,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:10:02,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:10:02,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:10:02,698 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:10:02,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:10:02,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137893159] [2022-12-13 11:10:02,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137893159] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:10:02,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220921161] [2022-12-13 11:10:02,698 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 11:10:02,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:10:02,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:10:02,699 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:10:02,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 11:10:02,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:10:02,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 11:10:02,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:10:02,826 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:10:02,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:10:02,881 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:10:02,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220921161] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:10:02,881 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:10:02,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-12-13 11:10:02,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069911000] [2022-12-13 11:10:02,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:10:02,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 11:10:02,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:10:02,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 11:10:02,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-12-13 11:10:02,973 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 234 [2022-12-13 11:10:02,974 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 1519 transitions, 34061 flow. Second operand has 15 states, 15 states have (on average 100.86666666666666) internal successors, (1513), 15 states have internal predecessors, (1513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:10:02,975 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:10:02,975 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 234 [2022-12-13 11:10:02,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:10:30,698 INFO L130 PetriNetUnfolder]: 32718/51059 cut-off events. [2022-12-13 11:10:30,698 INFO L131 PetriNetUnfolder]: For 3474039/3474039 co-relation queries the response was YES. [2022-12-13 11:10:31,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 591980 conditions, 51059 events. 32718/51059 cut-off events. For 3474039/3474039 co-relation queries the response was YES. Maximal size of possible extension queue 2327. Compared 401265 event pairs, 826 based on Foata normal form. 1508/52567 useless extension candidates. Maximal degree in co-relation 591832. Up to 18157 conditions per place. [2022-12-13 11:10:31,813 INFO L137 encePairwiseOnDemand]: 225/234 looper letters, 1692 selfloop transitions, 2157 changer transitions 33/3882 dead transitions. [2022-12-13 11:10:31,813 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 3882 transitions, 94147 flow [2022-12-13 11:10:31,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-12-13 11:10:31,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2022-12-13 11:10:31,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 10707 transitions. [2022-12-13 11:10:31,834 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.453033764914953 [2022-12-13 11:10:31,834 INFO L72 ComplementDD]: Start complementDD. Operand 101 states and 10707 transitions. [2022-12-13 11:10:31,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 101 states and 10707 transitions. [2022-12-13 11:10:31,839 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:10:31,839 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 101 states and 10707 transitions. [2022-12-13 11:10:31,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 102 states, 101 states have (on average 106.00990099009901) internal successors, (10707), 101 states have internal predecessors, (10707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:10:31,871 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 102 states, 102 states have (on average 234.0) internal successors, (23868), 102 states have internal predecessors, (23868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:10:31,874 INFO L81 ComplementDD]: Finished complementDD. Result has 102 states, 102 states have (on average 234.0) internal successors, (23868), 102 states have internal predecessors, (23868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:10:31,874 INFO L175 Difference]: Start difference. First operand has 356 places, 1519 transitions, 34061 flow. Second operand 101 states and 10707 transitions. [2022-12-13 11:10:31,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 3882 transitions, 94147 flow [2022-12-13 11:10:58,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 3882 transitions, 88122 flow, removed 2824 selfloop flow, removed 1 redundant places. [2022-12-13 11:10:58,373 INFO L231 Difference]: Finished difference. Result has 521 places, 2777 transitions, 71803 flow [2022-12-13 11:10:58,374 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=31056, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1047, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=101, PETRI_FLOW=71803, PETRI_PLACES=521, PETRI_TRANSITIONS=2777} [2022-12-13 11:10:58,374 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 479 predicate places. [2022-12-13 11:10:58,374 INFO L495 AbstractCegarLoop]: Abstraction has has 521 places, 2777 transitions, 71803 flow [2022-12-13 11:10:58,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 100.86666666666666) internal successors, (1513), 15 states have internal predecessors, (1513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:10:58,375 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:10:58,375 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:10:58,378 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-13 11:10:58,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-12-13 11:10:58,575 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-13 11:10:58,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:10:58,576 INFO L85 PathProgramCache]: Analyzing trace with hash -313211247, now seen corresponding path program 14 times [2022-12-13 11:10:58,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:10:58,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456209376] [2022-12-13 11:10:58,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:10:58,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:10:58,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:10:58,695 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:10:58,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:10:58,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456209376] [2022-12-13 11:10:58,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456209376] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:10:58,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752188336] [2022-12-13 11:10:58,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:10:58,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:10:58,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:10:58,696 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:10:58,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 11:10:58,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:10:58,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:10:58,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 11:10:58,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:10:58,806 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:10:58,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:10:58,869 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:10:58,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752188336] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:10:58,869 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:10:58,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2022-12-13 11:10:58,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985939664] [2022-12-13 11:10:58,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:10:58,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 11:10:58,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:10:58,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 11:10:58,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-12-13 11:10:58,964 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 234 [2022-12-13 11:10:58,965 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 521 places, 2777 transitions, 71803 flow. Second operand has 17 states, 17 states have (on average 100.47058823529412) internal successors, (1708), 17 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:10:58,965 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:10:58,965 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 234 [2022-12-13 11:10:58,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:11:53,050 INFO L130 PetriNetUnfolder]: 40791/63634 cut-off events. [2022-12-13 11:11:53,050 INFO L131 PetriNetUnfolder]: For 8280254/8280254 co-relation queries the response was YES. [2022-12-13 11:11:54,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 931023 conditions, 63634 events. 40791/63634 cut-off events. For 8280254/8280254 co-relation queries the response was YES. Maximal size of possible extension queue 2988. Compared 512490 event pairs, 6381 based on Foata normal form. 1270/64904 useless extension candidates. Maximal degree in co-relation 930808. Up to 29532 conditions per place. [2022-12-13 11:11:55,060 INFO L137 encePairwiseOnDemand]: 226/234 looper letters, 1865 selfloop transitions, 2161 changer transitions 100/4126 dead transitions. [2022-12-13 11:11:55,060 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 557 places, 4126 transitions, 120034 flow [2022-12-13 11:11:55,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-12-13 11:11:55,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-12-13 11:11:55,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 4763 transitions. [2022-12-13 11:11:55,065 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46260683760683763 [2022-12-13 11:11:55,065 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 4763 transitions. [2022-12-13 11:11:55,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 4763 transitions. [2022-12-13 11:11:55,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:11:55,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 4763 transitions. [2022-12-13 11:11:55,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 108.25) internal successors, (4763), 44 states have internal predecessors, (4763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:11:55,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 234.0) internal successors, (10530), 45 states have internal predecessors, (10530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:11:55,078 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 234.0) internal successors, (10530), 45 states have internal predecessors, (10530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:11:55,078 INFO L175 Difference]: Start difference. First operand has 521 places, 2777 transitions, 71803 flow. Second operand 44 states and 4763 transitions. [2022-12-13 11:11:55,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 557 places, 4126 transitions, 120034 flow [2022-12-13 11:13:51,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 544 places, 4126 transitions, 101369 flow, removed 7978 selfloop flow, removed 13 redundant places. [2022-12-13 11:13:51,828 INFO L231 Difference]: Finished difference. Result has 572 places, 3343 transitions, 84719 flow [2022-12-13 11:13:51,830 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=59403, PETRI_DIFFERENCE_MINUEND_PLACES=501, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2768, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1606, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1012, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=84719, PETRI_PLACES=572, PETRI_TRANSITIONS=3343} [2022-12-13 11:13:51,830 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 530 predicate places. [2022-12-13 11:13:51,830 INFO L495 AbstractCegarLoop]: Abstraction has has 572 places, 3343 transitions, 84719 flow [2022-12-13 11:13:51,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 100.47058823529412) internal successors, (1708), 17 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:13:51,830 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:13:51,830 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:13:51,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-12-13 11:13:52,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-12-13 11:13:52,031 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-13 11:13:52,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:13:52,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1175401429, now seen corresponding path program 15 times [2022-12-13 11:13:52,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:13:52,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292930130] [2022-12-13 11:13:52,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:13:52,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:13:52,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:13:52,184 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:13:52,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:13:52,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292930130] [2022-12-13 11:13:52,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292930130] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:13:52,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642967502] [2022-12-13 11:13:52,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 11:13:52,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:13:52,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:13:52,186 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:13:52,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 11:13:52,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 11:13:52,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:13:52,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 11:13:52,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:13:52,312 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:13:52,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:13:52,381 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:13:52,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642967502] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:13:52,381 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:13:52,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-12-13 11:13:52,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246922172] [2022-12-13 11:13:52,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:13:52,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 11:13:52,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:13:52,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 11:13:52,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-12-13 11:13:52,496 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 234 [2022-12-13 11:13:52,497 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 572 places, 3343 transitions, 84719 flow. Second operand has 16 states, 16 states have (on average 100.625) internal successors, (1610), 16 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:13:52,498 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:13:52,498 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 234 [2022-12-13 11:13:52,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:15:18,421 INFO L130 PetriNetUnfolder]: 57208/89563 cut-off events. [2022-12-13 11:15:18,421 INFO L131 PetriNetUnfolder]: For 12397820/12397820 co-relation queries the response was YES. [2022-12-13 11:15:21,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1273388 conditions, 89563 events. 57208/89563 cut-off events. For 12397820/12397820 co-relation queries the response was YES. Maximal size of possible extension queue 4322. Compared 756298 event pairs, 8728 based on Foata normal form. 2598/92161 useless extension candidates. Maximal degree in co-relation 1273149. Up to 31599 conditions per place. [2022-12-13 11:15:21,936 INFO L137 encePairwiseOnDemand]: 226/234 looper letters, 2586 selfloop transitions, 2897 changer transitions 39/5522 dead transitions. [2022-12-13 11:15:21,936 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 624 places, 5522 transitions, 151826 flow [2022-12-13 11:15:21,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-12-13 11:15:21,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2022-12-13 11:15:21,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 5840 transitions. [2022-12-13 11:15:21,944 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4621715732826844 [2022-12-13 11:15:21,944 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 5840 transitions. [2022-12-13 11:15:21,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 5840 transitions. [2022-12-13 11:15:21,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:15:21,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 5840 transitions. [2022-12-13 11:15:21,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 108.14814814814815) internal successors, (5840), 54 states have internal predecessors, (5840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:15:21,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 234.0) internal successors, (12870), 55 states have internal predecessors, (12870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:15:21,964 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 234.0) internal successors, (12870), 55 states have internal predecessors, (12870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:15:21,964 INFO L175 Difference]: Start difference. First operand has 572 places, 3343 transitions, 84719 flow. Second operand 54 states and 5840 transitions. [2022-12-13 11:15:21,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 624 places, 5522 transitions, 151826 flow [2022-12-13 11:18:21,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 619 places, 5522 transitions, 145281 flow, removed 2761 selfloop flow, removed 5 redundant places. [2022-12-13 11:18:22,047 INFO L231 Difference]: Finished difference. Result has 644 places, 4255 transitions, 114823 flow [2022-12-13 11:18:22,049 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=79943, PETRI_DIFFERENCE_MINUEND_PLACES=566, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2014, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=114823, PETRI_PLACES=644, PETRI_TRANSITIONS=4255} [2022-12-13 11:18:22,049 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 602 predicate places. [2022-12-13 11:18:22,049 INFO L495 AbstractCegarLoop]: Abstraction has has 644 places, 4255 transitions, 114823 flow [2022-12-13 11:18:22,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 100.625) internal successors, (1610), 16 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:18:22,050 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:18:22,050 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:18:22,053 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-13 11:18:22,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:18:22,251 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-13 11:18:22,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:18:22,252 INFO L85 PathProgramCache]: Analyzing trace with hash 521123737, now seen corresponding path program 16 times [2022-12-13 11:18:22,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:18:22,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164459345] [2022-12-13 11:18:22,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:18:22,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:18:22,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:18:22,388 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:18:22,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:18:22,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164459345] [2022-12-13 11:18:22,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164459345] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:18:22,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658953899] [2022-12-13 11:18:22,389 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 11:18:22,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:18:22,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:18:22,390 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:18:22,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3913ac0f-150c-4eb1-bb91-acebb5216962/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 11:18:22,447 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 11:18:22,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:18:22,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 11:18:22,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:18:22,490 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:18:22,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:18:22,548 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:18:22,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658953899] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:18:22,549 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:18:22,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2022-12-13 11:18:22,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387154244] [2022-12-13 11:18:22,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:18:22,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 11:18:22,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:18:22,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 11:18:22,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-12-13 11:18:22,646 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 234 [2022-12-13 11:18:22,646 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 644 places, 4255 transitions, 114823 flow. Second operand has 16 states, 16 states have (on average 100.8125) internal successors, (1613), 16 states have internal predecessors, (1613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:18:22,646 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:18:22,646 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 234 [2022-12-13 11:18:22,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:20:39,275 INFO L130 PetriNetUnfolder]: 73161/113914 cut-off events. [2022-12-13 11:20:39,275 INFO L131 PetriNetUnfolder]: For 20157859/20157859 co-relation queries the response was YES. [2022-12-13 11:20:43,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1797337 conditions, 113914 events. 73161/113914 cut-off events. For 20157859/20157859 co-relation queries the response was YES. Maximal size of possible extension queue 5739. Compared 987818 event pairs, 13148 based on Foata normal form. 1770/115684 useless extension candidates. Maximal degree in co-relation 1797073. Up to 65709 conditions per place. [2022-12-13 11:20:44,414 INFO L137 encePairwiseOnDemand]: 225/234 looper letters, 3237 selfloop transitions, 3358 changer transitions 3/6598 dead transitions. [2022-12-13 11:20:44,414 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 706 places, 6598 transitions, 197466 flow [2022-12-13 11:20:44,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-12-13 11:20:44,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2022-12-13 11:20:44,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 6745 transitions. [2022-12-13 11:20:44,420 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4575362908696242 [2022-12-13 11:20:44,420 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 6745 transitions. [2022-12-13 11:20:44,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 6745 transitions. [2022-12-13 11:20:44,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:20:44,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 6745 transitions. [2022-12-13 11:20:44,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 107.06349206349206) internal successors, (6745), 63 states have internal predecessors, (6745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:20:44,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 234.0) internal successors, (14976), 64 states have internal predecessors, (14976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:20:44,436 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 234.0) internal successors, (14976), 64 states have internal predecessors, (14976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:20:44,436 INFO L175 Difference]: Start difference. First operand has 644 places, 4255 transitions, 114823 flow. Second operand 63 states and 6745 transitions. [2022-12-13 11:20:44,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 706 places, 6598 transitions, 197466 flow